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1
Kassali, Rabirou, Abayomi Yusuf Oyewale, and Olufemi Adedotun Yesufu. "Analysis of Consumer’s WTP for Cowpea Varieties in Osun State, Nigeria: the Hedonic Pricing Approach." Turkish Journal of Agriculture - Food Science and Technology 6, no. 9 (September 9, 2018): 1120. http://dx.doi.org/10.24925/turjaf.v6i9.1120-1128.1832.
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Analysis of consumer preferences for cowpea varieties in Osun State was carried out with a view to identifying attributes that determine price variation among cowpea varieties and the effect on consumer’s willingness to pay for those varieties. A multistage sampling technique was used to randomly select 240 respondents for the study, comprising 180 cowpea consumers and 60 retailers. Primary data were collected on cowpea varieties, their attributes and the consumer’s willingness to pay for cowpea varieties using well structured questionnaire. Data collected were analysed using both descriptive and inferential statistics. The results showed that out of thirteen varieties found in the area, only nine varieties of cowpea were common in the market. The quality of each variety differs which explained variation in their price. In terms of preference the Oloyin variety is preferred most by 78% of consumers. Weevil resistance had the highest rank among the cowpea attributes. Oloyin had the highest WTP followed by Milk and Drum with ₦303, ₦237 and ₦213 per kg, respectively. Hedonic pricing methods provide a statistical estimate of premiums and discounts for cowpea attributes. Results indicated that weevil resistance was the most important attribute to consumer. Cowpeas with weevil damage tolerance, brown colour, large grain size and short cooking time commanded price premium for almost all the varieties. The consumer discounted prices for insect damage, small size, white colour, smooth skin and grain colour mixed together. The study concludes on the need for breeders and research institutes to incorporate these cowpea attributes that attracted price premium into their cowpea breeding programmes.
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Sombié, Pierre, Moussa Compaoré, Ahmed Coulibaly, Jeremy Ouédraogo, Jean-Baptiste Tignégré, and Martin Kiendrébéogo. "Antioxidant and Phytochemical Studies of 31 Cowpeas (Vigna unguiculata (L. Walp.)) Genotypes from Burkina Faso." Foods 7, no. 9 (September 3, 2018): 143. http://dx.doi.org/10.3390/foods7090143.
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Antioxidant compounds of dietary plants have been widely studied because of their bioactive properties. The objective of this research study was to analyse the health enhancing attributes of 31 cowpeas varieties from Burkina Faso. Significant variations were observed in the phenolic content as well as the antioxidant and anti-lipid peroxidation activities amongst the cowpea varieties. Pearson correlation coefficient analysis showed that the ferric reducing ability (r = 0.954) and anti-lipid peroxidation (r = 0.616) were positively correlated with the total phenolic content. A significant relationship between cowpea ferric reducing ability and anti-lipid peroxidation (r = 0.64) was also revealed. However, nitric oxide scavenging potential was found not to be related to its total phenolic and total flavonoid content. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radicals scavenging potentials were not correlated with the total flavonoid content. The pigmented seeds of cowpea varieties possess higher total phenolic, total flavonoid content, ferric reduction ability, and anti-lipid peroxidation activities than the colourless ones. The results obtained from this study suggest that Burkina Faso cowpea cultivars are rich in phenolic compounds and have significant antioxidant and anti-lipid peroxidation activities. Consumption of the cowpea, particularly of coloured cowpea seed varieties, should be beneficial for chronic human diseases prevention.
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Nkomo, Gabriel V., Moosa M. Sedibe, and Maletsema A. Mofokeng. "Production Constraints and Improvement Strategies of Cowpea (Vigna unguiculata L. Walp.) Genotypes for Drought Tolerance." International Journal of Agronomy 2021 (March 22, 2021): 1–9. http://dx.doi.org/10.1155/2021/5536417.
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Cowpea (Vigna unguiculata L. Walp. L) is an important leguminous crop largely grown by smallholder farmers in sub-Saharan Africa for food security and animal feed. The objective of this study was to review the production constraints and improvement strategies of cowpea genotypes for drought tolerance. Data were analysed through use of literature review from various sources. In sub-Saharan Africa, cowpeas are produced mainly from West Africa, which accounts for 60% of worldwide production. A lot of pests and diseases affect cowpeas, and this often results in total crop loss. Through continuous improvement, many new cultivars are continually being identified and genetically characterised, and it is thus necessary to evaluate these new lines under different environments. There is a need for multidisciplinary collaborations among breeders and other relevant stakeholders such as farmer and extension workers because the improved cultivars must be according to the farmers preferred traits. Due to declining rainfall pattern in sub-Saharan Africa, there is an urgent requirement for cowpea breeding programmes that focus on developing varieties with short maturity, drought, pest, and disease tolerance. The present review discusses the constraints and improvement strategies of cowpea varieties for drought tolerance.
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Izuogu, N. B., T. U. Olajide, E. K. Eifediyi, and C. M. Olajide. "Effect of Root-knot Nematode (Meloidogyne incognita) on the Nodulation of Some Varieties of Cowpea (Vigna unguiculata L. Walp)." Scientia Agriculturae Bohemica 50, no. 2 (June 1, 2019): 104–9. http://dx.doi.org/10.2478/sab-2019-0015.
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Abstract Screenhouse and field trials were conducted at the University of Ilorin, Nigeria in 2013 and 2014 to investigate the effect of root knot nematode (Meloidogyne incognita) on the nodulation of five varieties of cowpea (IT89KD-288, IT82D-994, IT93K-452-1, T89K-391 and TT97 568-18). Half of the experimental plants were inoculated with Meloidogyne incognita eggs (n = 1500) while the remaining half served as uninoculated control plants. Data on growth and yield of cowpea, root gall, nodulation, and nematodes population densities in nodules were collected. Other parameters assessed included colour of dissected infected and uninfected nodules, texture of the nodules and varietal performance of the cowpeas. The results of both screenhouse and field trials were consistent in yield and visual observations of texture and colour. The yield of nematode-free varieties was significantly higher than that of M. incognita-infected ones. Infected nodules were dark brown in colour while the healthy ones were pink. For the field trials, nodulation counts in nematode inoculated plants were inversely proportional to the number of galls in their uninoculated counterparts in some varieties. Of all varieties, IT89KD-288 was most resistant to M. incognita. Due to high cost involved in the management of nematodes, especially with synthetic chemicals, variety IT89KD-288 is recommended for use in nematode endemic areas in Nigeria. Further study needs to be done on the histopathology of the infected and uninfected roots and nodules of these cowpea varieties.
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Kouyaté, Zoumana, Tatiana Krasova-Wade, Inamoud Ibny Yattara, and Marc Neyra. "Effects of Cropping System and Cowpea Variety on Symbiotic Potential and Yields of Cowpea (Vigna unguiculataL. Walp) and Pearl Millet (Pennisetum glaucumL.) in the Sudano-Sahelian Zone of Mali." International Journal of Agronomy 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/761391.
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Many cowpea varieties (Vigna unguiculataL. Walp) have been proposed by research in Mali. None of these varieties were investigated for their symbiotic potential in terms of root nodulation and mycorrhizal infection. An experiment was conducted at Cinzana Research Station, from 2007 to 2009 with an objective to identify a cowpea variety with high symbiotic potential which may improve millet/cowpea cropping global production. Randomized complete block (RCBD) design with a factorial combination of 3 cowpea varieties (IT89KD-374, CZ1-94-23-1, and CZ11-94-5C) and 2 cropping systems (millet/cowpea intercropping and cowpea-millet rotation) was used. On farm test was conducted to evaluate CZ11-94-5C and IT89KD-374 nodulation performance. Cowpea variety CZ11-94-5-C had the highest nodule number and nodule weight. Millet/cowpea alternate rows intercropping (1/1), only, had a significant influence on cowpea root infection rates by mycorrhizae, on the 45th day after emergence. IT89KD-374 gave the best cowpea grain yield (1540 kg ha−1) in sole crop. The highest millet grain yield (1650 kg ha−1) was obtained under CZ11-94-5C-millet rotation. Farmers' fields assessments results confirmed CZ11-94-5C performance on research station. The CZ11-94-5C cowpea variety needs to be more characterized.
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Odeyemi, Ishola, Steve Afolami, and Olufemi Sosanya. "Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea Varieties." Journal of Plant Protection Research 50, no. 3 (September 1, 2010): 321–25. http://dx.doi.org/10.2478/v10045-010-0055-8.
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Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea VarietiesTwo pot experiments and a field study were conducted in a Randomized Complete Block Design (RCBD). The experiments were conducted to determine the effect ofGlomus mosseae, a mycorrhiza fungus, on the reaction of four improved cowpea varieties toMeloidogyne incognita.Cowpea plants were inoculated with a single or a combination of 5 000 eggs ofM. incognitaand 50 g ofG. mosseaeinoculum containing 5 spores/g of soil. The standardized method of screening and reporting resistance of crop germplasm to root-knot nematodes at 60 days after planting, and the modified version of including yield for resistance rating at harvest were used for this study. Root galling due toM. incognitainfection was significantly lower on all the cowpea varieties treated withG. mosseaeand more significantly on IT90K-277-2 and IT89KD-288 in the screenhouse.G. mosseae, suppressed root-knot nematode reproduction on all the varieties compared to cowpea plants infected only byM. incognitaboth in the screenhouse and field experiments. Also,G. mosseaemitigated the damage attributable to the root-knot nematode on all these varieties. Using Gall Index (GI), reproduction factor and yield,G. mosseaewas effective in improving the resistance of the cowpea varieties toM. incognita.IT90K-76 cowpea variety was consistently resistant to the root-knot nematode, while IT90K-277-2 was tolerant withM. incognitainfection but resistant withG. mosseaetreatment. IT90K-941-1 variety was resistant in the screenhouse. The results of this study also confirmedG. mosseaeas a potential bio-control agent forM. incognitaon these cowpea varieties.
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Oladejo, A. S., A. O. Bolaji, I. O. Obisesan, and O. G. Omitogun. "SDS-Page characterization of some elite cowpea (Vigna unguiculata L. Walp) varieties." Nigerian Journal of Biotechnology 36, no. 2 (March 12, 2020): 45–51. http://dx.doi.org/10.4314/njb.v36i2.6.
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The shortcomings of genotype x environment interaction necessitated the use of molecular methods in characterizing many plant species and in determining their phylogenetic relationships. In this study, some selected cowpea lines (27 varieties) from Obafemi Awolowo University, Ile – Ife, the Institute of Agricultural Research (IAR), Samaru, Kaduna and Genetic Resource Centre, IITA, Ibadan were characterized using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) profiling. The protein banding profiles of the 27 cowpea varieties were scored and subjected to cluster analysis using Ward's minimum-variance method (WMVM) for dendrogram grouping. The dendrogram generated from the SDS-PAGE profiles grouped the varieties into seven clusters at 52% similarity coefficient. Hence, the biochemical characterization revealed more precise discrimination among the 27 cowpea varieties studied.
Keywords: Cowpea, electrophoretic banding profiles, dendrogram grouping, total proteins
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Haruna, Abdulai, James Matent Kombiok, Askia Musah Mohamed, Joseph Sarkodie-Addo, Asamoah Larbi, and Nurudeen Abdul Rahman. "Profitability of Cowpea Intercropped With Maize in West Africa Guinea Savanna." Journal of Agricultural Science 10, no. 11 (October 15, 2018): 185. http://dx.doi.org/10.5539/jas.v10n11p185.
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An on-farm trial was conducted over a 2-year period in Tibali in the Savelugu district of Northern region of Ghana to evaluate the productivity and economic returns of hybrid and open pollinated maize (OPV) either in pure stands or intercropped with erect and trailing cowpea. The maize varieties used were medium maturing (110 days) whie the cowpea varieties were early maturiing (70 days). The experiment was conducted in a randomized complete block design with 14 treatments (sole pan53, sole Etubi, sole mamaba, sole obatampa, sole erect cowpea, sole trailing cowpea, erect cowpea + pan53, erect cowpea+etubi, erect cowpea+mamaba, erect cowpea+obatampa, traing cowpea + pan53, traling cowpea+etubi, trailing cowpea+mamaba and trailing cowpea + obatampa) replicated on 10 farms. Intercropping had better productivity and economic returns than sole cropping. Intercropping maize with trailing cowpea type had better productivity and economic return than intercropping with erect type of cowpea. Intercropping the OPV maize with cowpea had better productivity and economic return than intercropping hybrid maize with cowpea. Farmers may either intercrop OPV maize with trailing cowpea type or hybrid maize variety Pan 53 maize with trailing cowpea type for better productivity and economic return.
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Massey, Preeti, and MK Nautiyal. "Development of short duration cowpea varieties." International Journal of Chemical Studies 8, no. 2 (March 1, 2020): 246–48. http://dx.doi.org/10.22271/chemi.2020.v8.i2d.8777.
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Ofuya, T. I., and P. F. Credland. "Differences in the susceptibility of seeds of selected varieties of cowpea to Bruchidius atrolineatus (Coleoptera: Bruchidae)." Bulletin of Entomological Research 85, no. 2 (June 1995): 259–65. http://dx.doi.org/10.1017/s0007485300034349.
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AbstractThe bruchid Bruchidius atrolineatus (Pic) causes significant damage to the stored protein rich seeds of cowpea, Vigna unguiculata, in the West African Sahel. Twenty varieties of cowpea were evaluated for susceptibility to attack by B. atrolineatus in the laboratory. The bruchid showed differential response to the seeds in terms of developmental period, percentage adult emergence, seed weight loss due to feeding by one larva, adult weight at emergence and life-time fecundity of females reared from them. Based on these criteria, IT85F-2205 and IT84S-275-9 were the least susceptible varieties. The development of B. atrolineatus was most significantly delayed in these varieties. The beetle larvae consumed less of their seed material and adults reared from them were smallest and least fecund. The varieties IT87S-1393, IT90K-391 and IT84D-460 also had relatively lower susceptibility to the beetle than others. In a no-choice oviposition experiment, B. atrolineatus females laid equally on all varieties. Percentage egg hatch on the different cowpea varieties did not differ significantly. The results are discussed in relation to previous reports on susceptibility of cowpea and other legumes to bruchids.
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Hassane Bil-Assanou, Issoufou, and Moussa Na Neitoabdoul Rafiou. "EVALUATION MULTI-SITE DE LEFFET DU PARASITISME AU STRIGA GESNERIOIDES (WILLD) VATKE SUR LES TRAITS FONCTIONNELS DES VARIETES DE NIEBE." International Journal of Advanced Research 8, no. 12 (December 31, 2020): 639–49. http://dx.doi.org/10.21474/ijar01/12191.
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Cowpea(Vigna unguiculata (L.) Walp) is a major legume crop in West African farming systems. Although cowpea is a drought tolerant crop, its production level is very low due to biotic constraints such as Strigagesnerioides parasitism. The present study aims to assess the effect of S. gesnerioides(Willd.) Vatkeon photosynthesis efficiency of cowpea varieties. Multilocal trialwas carried out rural areas during the 2017 rainy season to assess the number of Striga emergence likely to cause a change in photosynthetic efficiency on a panel of 26 cowpea varieties and to determine tolerant varieties. The observations were made on six experimental sites along a south-north climatic gradient representative ofMaradi region agro-ecological zones.The results showed a marked decrease of relative chlorophyll content when the number of visible Strigaemergence exceeded five per plant. Likewise, the LEF * PAR saturation curve is higher when the plants showed no visible attack of Striga. The Striga emergence have declined CRC in varieties CS001 and CS127 and led in rapid saturation in variety CS133.
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KAMARA, ALPHA Y., ABDULLAHI I. TOFA, STEPHEN KYEI-BOAHEN, REUBEN SOLOMON, HAKEEM A. AJEIGBE, and NKEKI KAMAI. "EFFECTS OF PLANT DENSITY ON THE PERFORMANCE OF COWPEA IN NIGERIAN SAVANNAS." Experimental Agriculture 54, no. 1 (October 21, 2016): 120–32. http://dx.doi.org/10.1017/s0014479716000715.
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SUMMARYGrain yields of cowpea [Vigna unguiculata (L.) Walp.] in the Nigerian savannas are low even with the cultivation of improved varieties. The recommended spacing for cowpea is 75 × 20 cm with two seeds planted per stand. This corresponds to plant population of 133333 plants ha−1, which may not be sufficient for optimal cowpea yield. Field experiments were conducted to determine plant density effects on cowpea performance in the Northern Guinea and the Sudan savannas of Nigeria and also to determine if genotypes varied in their response to plant density. Four cowpea varieties with contrasting maturity duration were planted in single, double and triple rows on ridges spaced 75 cm apart to achieve corresponding densities of 133333, 266666 and 400000 plants ha−1, respectively. Plant densities of 266666 and 400000 plants ha−1 gave higher crop performance in terms of light interception, biomass production, yield and yield components for all cowpea varieties. Yield increases were related largely to increased pod and seed production but the effect of seed size on yield was relatively minor. Our results provide evidence that the current density of 133333 plants ha−1 used by farmers is not optimum for cowpea production. Smallholder farmers can increase cowpea grain and fodder yields if they use a density of 266666 plants ha−1 in cowpea cultivation. Further yield increases when cowpea is planted at 400000 plants ha−1 may not be sufficient to offset the cost of seed.
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Samson, Alonge, and Alabi Kehinde. "Effect of Alectra Vogelii and Striga Gesnerioides Infestations on the Grain Mineral Elements' Concentration of Cowpea Varieties." Journal of Plant Protection Research 49, no. 1 (March 1, 2009): 105–12. http://dx.doi.org/10.2478/v10045-009-0014-4.
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Effect ofAlectra VogeliiandStriga GesnerioidesInfestations on the Grain Mineral Elements' Concentration of Cowpea VarietiesField trials were conducted in 1999 and 2000 to investigate the effect ofStriga gesnerioidesandAlectra vogeliion the grain mineral elements' concentration of five cowpea varieties at harvest: IT82D-849, IT86D-534, IT89KD-245, KANO 1696 and SAMPEA7. The mineral elements analyzed were: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), manganese (Mn) and zinc (Zn). Obtained data showed that the concentration of most elements was generally reduced in the grains of the cowpea varieties IT82D-849 and IT89KD-245 on bothAlectraandStrigainoculated plots. On the other hand, cowpea varieties KANO1696 and SAMPEA7 showed a tendency towards having increased concentration of about 50% of the element analyzed in each year on bothAlectraandStrigainoculated plots. In both KANO1696 and SAMPEA 7 there was a tendency towards the increase in the grain concentration of Mg and Zn and the decrease in K and Mn onAlectrainoculated plots and the increase in P and Mg but the decrease in Ca and Zn onStrigainoculated plots. The concentration of P in all the varieties in 1999 and 2000 (except IT89KD245 in 2000) was increased onStrigainoculated plots. Also, the concentration of Mg and N was increased in IT82D-849 on bothStrigaandAlectrainoculated plots in 2000. This study showed that,StrigaandAlectrainfestation generally reduced the mineral elements' concentration in the grains of cowpea varieties
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Adigbo, Sunday Ojo, Thomas Oladeji Fabunmi, Anthony Isadeha, Veronica Bola Adigbo, Joy Nwakaego Odedina, and K. Babatunde Korede. "Effects of Preceding Cowpea on the Performance of Maize in Cowpea-Maize Sequential Cropping." Agricultura tropica et subtropica 46, no. 3 (September 1, 2013): 91–96. http://dx.doi.org/10.2478/ats-2013-0016.
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Abstract Field experiment was conducted at the Federal University of Agriculture in 2004/2005, 2005/2006 and 2006/2007 cropping seasons to investigate the effects of cowpea varieties on succeeding of maize crop. The experiment was laid out in split-plot design and the treatment replicated three times. The main plot treatment was sprayed and unsprayed cowpea (Vigna unguculata L.) while variety constituted the subplot treatment (IT90K-76, IT90K-277-2, Drum, Olo, Oloyin, Mallam and Sokoto varieties). Maize variety cv TZESR-W was planted as the test crop in the early cropping season of 2005, 2006 and 2007 on each subplot of the preceding cowpea. The biomass of cowpea in the spray plots were higher than those of unsprayed at 8, 10 WAP in 2004. Olo variety had significantly lower biomass compared to others in 2004. The grain yield of cowpea from the sprayed plots was significantly higher than the unsprayed plots in all the years. IT90K-76 variety had the highest grain yield whereas Mallam and Drum had the lowest in all the years. Maize grain yields from the preceding cowpea plots were significantly higher than that of 0 N kg/ha. The fertilizer equivalent of the preceding varieties of cowpea ranges between 24 and 38 N kg/ha. Thus, preceding cowpea enhances the performance of succeeding maize.
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Olabiyi, Timothy I., and Oladiran J. Ojo. "Impact Assessment of Neem Compost and Trichoderma harzianum Solution in the Control of Root Knot Nematode Disease on Cowpea." International Journal of Phytopathology 5, no. 2 (August 31, 2016): 67–71. http://dx.doi.org/10.33687/phytopath.005.02.1475.
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Efficacy of neem leaf based compost andTrichoderma harzianum solution were assessed on root knot nematode pest of two cowpea varieties at the screen house of the International Institute of Tropical Agriculture (IITA), Ibadan during 2012 planting season. The two cowpea varieties which have been confirmed to be susceptible to root knot nematode, IT96D-610 and IT84S-2246-4 were the test crops. The experimental pots (10kg soil) were inoculated with 5,000 root knot nematode eggs. The treatments were neem compost and T. harzianum solution with application rates of 2 ton/ha and 1x10-7 spores respectively. The pots that were not treated served as the control. Each treatment was replicated 4 times while the statistical design was complete randomized design. Data were collected on the growth and yield of cowpea, and also on the nematode populations in the soil and cowpea root. The results indicated that neem compost and T. harzianum solution significantly increased the growth and yield of IT96D-610 and IT84S-2246-4 cowpea varieties grown in the root knot nematode inoculated soil. The populations of root knot nematode in the soil and cowpea root were significantly reduced. The level of root damage (root gall) was significantly reduced in the neem compost and T. harzianum treated cowpea when compared with the untreated control.
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Ojedokun, Ajibola, and Olufemi Yesufu. "Households' preference for some selected cowpea varieties in Oyo State, Nigeria." Journal on Processing and Energy in Agriculture 24, no. 3-4 (2020): 108–14. http://dx.doi.org/10.5937/jpea24-30030.
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This study was carried out to determine the factors influencing households' preference for some selected cowpea varieties in Oyo State, Nigeria. Primary data were collected from a total of 250 households from five Local Government Areas (LGAs) using the multistage sampling technique. Data were analysed using descriptive statistics and multinomial logit regression model. The study revealed that households mostly preferred the Oloyin variety of cowpea and that households mostly used Oloyin for their different cooking. The age of household head, the primary occupation of household head, years of formal education, income, prices of cowpea varieties, aroma during cooking, ability to tolerate weevil infestation and absence of foreign particles influenced households' preference for cowpea varieties. The study recommends that it is necessary for stakeholders and breeding institutions to give attention to the Oloyin variety if the Agricultural Promotion Policy's aim will be achieved.
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Okonya, Joshua S., and Brigitte L. Maass. "Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results." International Journal of Agronomy 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/515629.
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CowpeaVigna unguiculata(L.) Walp. is an important leafy vegetable and grain legume in Uganda. Unlike in commercial agriculture, where variety mixtures are known to give higher and more stable yields, the performance of cowpea variety mixtures in subsistence agriculture is little known. Mixtures containing up to four cowpea varieties were subjected to all possible 2-way, 3-way, and 4-way combinations. These cowpea varieties and mixtures were grown at three locations in Soroti and Kumi districts in order to assess the relative mixture effect, defined as: Mixture effect (%) = (mixture yield − pure line component average)/pure line component average × 100. Yield data was subjected to one-way ANOVA using the GLM procedure of SYSTAT. PLABSTAT was used to generate ecovalence (Wi) values as a measure of stability with low ecovalence values indicating higher stability. The total cowpea dry matter (DM) yield was in the range of 3.7–6.7 g/m2(leaf) and 12.1–36.7 g/m2(grain), respectively. Mixture effects were between −9.3–14.0% (leaf) and −30.3–21.9% (grain). Yield stability spanned Wi= 0.06–5.30 (leaf) andWi= 4.45–894.84 (grain). The results suggested that yields of cowpea variety mixtures grown in marginal environments were more stable than of single varieties but not all mixtures yielded more than single varieties.
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Haruna, Peter, Aaron T. Asare, and Francis Kusi. "Assessment of Striga gesnerioides (Willd.) Resistance and Genetic Characterization of Forty-Six Cowpea (Vigna unguiculata (L.) Walp.) Genotypes in Ghana." International Journal of Agronomy 2020 (June 23, 2020): 1–9. http://dx.doi.org/10.1155/2020/3635157.
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The parasitic weed, Striga gesnerioides, imposes physiological stress on cowpea (Vigna unguiculata (L.) Walp.) resulting in significant yield loss in the regions of northern Ghana. This warranted identification of resistant cowpeas for sustainable production. The current work aim was to identify Striga-resistant cowpea genotypes and assess their genetic relatedness. Forty-six (46) cowpea genotypes were screened in pots for their reaction to Striga samples obtained from the upper east, upper west, and northern regions of Ghana and validated with C42-2B and 61R-M2 markers involving DNA amplification by PCR assay. Sixteen polymorphic SSR primer pairs were used to assess genetic relatedness among 46 cowpea genotypes. Data were analyzed with PowerMarker V. 3.25 and a dendrogram was generated with MEGA 4. On the whole, 65.2% of the cowpea genotypes had stable resistance to S. gesnerioides from the regions of northern Ghana and 34.8% were susceptible. The C42-2B marker resolved as a single DNA band of 280 bp with segregation efficiency of 80% and 61R-M2 marker as double DNA bands of 320 bp and 380 bp with segregation efficiency of 60% associated with Striga resistance. Sixteen (16) polymorphic SSR primers distinguished all 46 cowpea genotypes into three clusters. Gene diversity ranged from 0.04 to 0.49 with an average of 0.29. The average allele frequency is 0.78, with a mean genetic diversity of 0.29. Polymorphism information content (PIC) varied from 0.08 to 1.00 with an average of 0.55. Therefore, cowpeas with Striga resistance and other desirable traits can be evaluated and released as varieties for farmers to cultivate.
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Mawal, M. R., S. A. Ranade, Y. R. Mawal, S. N. Ranadive, A. Bhattacharya, and P. K. Ranjekar. "Novel application of quantitative immunoassays for screening seed globulins of cowpea varieties*." Bioscience Reports 5, no. 8 (August 1, 1985): 673–81. http://dx.doi.org/10.1007/bf01116999.
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Using antibodies raised in rabbits, radioimmunoassay (RIA) and enzyme-linked immunosorbent assay (ELISA) are standardized for cowpea (var. Pusa Barsati) seed globulins. The RIA, when used to screen three stages of seed development, reveals that maximum globulins are detected at 28 days after flowering. When three different varieties of cowpea are assayed for their globulin content by RIA and ELISA, it is observed that the Bold Grain cowpea has the highest amount of related globulin as compared to two other varieties, namely Pusa Phalgun and Asparagus Bean.
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Ojo, V. O. A., S. J. Olufemi, G. A. Adetokunbo, B. T. Odunaye, B. A. Bakare, and T. A. Adeyemi. "Growth components and chemical composition of some improved dual-purpose cowpea (Vigna unguiculata L. Walp) varieties as influenced by manure application." Nigerian Journal of Animal Production 44, no. 2 (December 26, 2020): 299–310. http://dx.doi.org/10.51791/njap.v44i2.1122.
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Field experiment was conducted to determine the effect of swine manure application on the growth components and chemical composition of nine varieties of improved dual-purpose cowpea (Vigna unguiculata L. Walp). The experiment was laid out as a 2 x 9 factorial design with two levels of manure application (0kg ha-1 and 5kg ha-1) and nine varieties of improved dual-purpose cowpea at three replicates. Agronomy parameters and dry matter yield of the cowpea were determined six weeks after sowing. Results showed that unfertilized variety IT- 332 recorded highest leaf proportion (57.27) above others. Varieties IT-193 with manure (80.00 cm) and IT-297 without manure (30) recorded significantly higher (P<0.05) values for plant height and leaf number respectively. Dry matter yield of cowpea ranged significantly higher (P<0.05) from 7.20 t ha-1 in variety IT-817 without manure to 14.85 t ha-1 in variety IT-321 with manure. The average crude protein content of improved cowpea varieties ranged significantly (P < 0.05) from 97.69 g kg-1 dry matter in unfertilized IT-817 and IT-834 to 141.17 g kg-1 dry matter in fertilized IT-819. The study showed that application of swine manure into cowpea increased the dry matter yield and chemical composition which is necessary to provide sufficient feed for ruminants that can be used as a supplement during the dry season.
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Simunji, Simunji, Kalaluka L. Munyinda, Obed I. Lungu, Alice M. Mweetwa, and Elijah Phiri. "Optimizing Soil Moisture and Nitrogen Use Efficiency of Some Maize (Zea mays) Varieties under Conservation Farming System." Sustainable Agriculture Research 7, no. 4 (August 9, 2018): 42. http://dx.doi.org/10.5539/sar.v7n4p42.
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In Zambia, small holder farmers depend on producing maize (Zea mays), which is a major staple food for many Zambians. Maize productivity among the smallholder farmers is quite low, giving only 2.3 tons per hectare. The low yields are attributed to insufficient and erratic rain fall, low soil fertility, and poor farming practices. Therefore, the objective of this study was to evaluate the performance of maize genotypes for nitrogen use efficiency and soil moisture utilisation under conservation farming system. The trials were carried out at two sites with different soil types. Three maize varieties i.e. ZMS 606, GV 640 and GV 635 were evaluated in maize – cowpea rotation. Four cowpea varieties used for rotation with maize, i.e. Bubebe Lutembwe, BB 14-16-2-2 and LT 11-3-3-12. BB 14-16-2-2 and LT 11-3-3-12 are mutation-derived lines of Bubebe and Lutembwe cowpea parent varieties respectively. The experimental design used was split plot with three replications. The NUE was significantly (P< 0.05) higher in CF and accounted for 27 % and 15% more than conventional farming system which valued 17% and 3% at Chisamba and Batoka, respectively. while soil moisture content was higher at Batoka than Chisamba in CF system. ZMS 606 and GV 640 varieties were superior over GV 635 for NUE. Cowpea variety BB 14-16-2-2 significantly increased NUE of maize varieties. Therefore, smallholder farmers in Zambia can increase maize productivity in maize - cowpea rotation system due to the increased NUE. Recommendations are made for farmers to select improved nitrogen efficient maize varieties to optimize productivity of maize in conservation farming system.
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Nagre, P. K. "Evaluation of Different Cowpea Varieties and Genotypes." International Journal of Pure & Applied Bioscience 5, no. 3 (August 20, 2017): 329–34. http://dx.doi.org/10.18782/2320-7051.4097.
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OKE, D. B., O. O. TEWE, and B. L. FETUGA. "THE NUTRIENT COMPOSITION OF SOME COWPEA VARIETIES." Nigerian Journal of Animal Production 22, no. 1 (January 6, 2021): 32–36. http://dx.doi.org/10.51791/njap.v22i1.2024.
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Five varieties of cowpea (Vigna unguiculata) were analysed for their proximate composition, major mineral elements and carbohydrate fractions. Values for crude protein ranged from 25.80% to 28.95% while the ether extract, crude fibre, total ash and total carbohydrate had the following values: 1.83 - 2.37%, 3.06 - 4.48%, 5.80 - 7.10% and 50.46 - 55.76% respectively. The average values for phosphorus, calcium, magnesium, potassium and sodium were 0.400%, 0.019%, 0.345%, 1.280% and 0.046% respectively. Ethanol soluble sugars ranged between 4.78g/100g and 6.14/100g while starch contents varied between 32.97g,100g and 44.269100g. Raffinose and stacliyose contents were 1.55 - 2.44g/100g and 3.33-435g/100g respectively.
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OKE, D. B., O. O. TEWE, and B. L. FETUGA. "EFFECT OF COWPEA SEED PROCESSING ON INTESTINAL MICROFLORAL POPULATION OF RATS." Nigerian Journal of Animal Production 23, no. 2 (January 12, 2021): 141–46. http://dx.doi.org/10.51791/njap.v23i2.2262.
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Five cowpea varieties were subjected to autoclaving, cooking, germination and soaking. Soaked samples gave the highest intestinal microfloral population with autoclaved and cooked cowpea seeds having intermediate microbial count values aithough cooking was more effective than autoclaving in reducing microbial population. Germinated samples gave very little microbial population. Intestinal microfloral population was positively correlated (r=0.85; P<0.001) to oligosaccharide concentrations, in the raw cowpea varieties, good nuniber of the antinutritional factors worked complementarily depending on the processing method with the oligosaccharides and thus hai significant effects in promoting microhial growth. Varietal and processing methoris greatly influenced microbial population (P<0.001).
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Khadka, R., and MN Paudel. "Inclusion of grain legumes in rice based systems in the mid-hills of central Nepal." Agronomy Journal of Nepal 1 (February 3, 2013): 61–66. http://dx.doi.org/10.3126/ajn.v1i0.7543.
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Grain legumes are the important crops for improving soil condition and dietary status of humans. These crops could improve both soil and human health if grown in the prevailing farming systems. Keeping these view in mind, participatory varietals selection (PVS) on lentil (Lens esculents L.), mung bean (Vigna radiata ) and cowpea (Vigna ungiculuta) was conducted in the central mid hills (Ramechha and Sindhuli districts) of Nepal. Five varieties of lentil (ILL 7982, ILL 6829, ILL 7537, ILL 7723 and Simal), four of mung bean (VC 3960, Kalyan, Pratiksha and Farmers' Local) and cowpea (Surya, Prakash, IT 86-2089-5F and America) were tested at different locations of those districts under rice-wheat-fallow and rice-fallow-maize systems during 2007 to 2009. All of those varieties were tested in farmers’ field condition keeping farmers as a replication in RCB design with ten replications for each crop. Agronomic practices were performed by farmers as and when necessary. Among the tested varieties of lentil, ILL 7982 produced the highest grain yield of 1347 kg/ha whereas Sital produced the lowest grain yield of 1003kg/ha. Similarly for mung bean, the variety VC 3960 gave the highest grain yield of 1145kg/ha and Pratiksha produced the lowest grain yield of 975 kg/ha. Likewise, among the tested varieties of cowpea, America gave the highest pod yield of 5320 kg/ha and Prakash gave the lowest pod yield of 3400 kg/ha. These varieties were identified suitable for further promotion in different cropping patterns such as rice-lentil- maize, rice-maize/mung bean, ricemaize/ cowpea systems. Simple economic analysis of the cropping systems under question indicated that inclusion of legumes in the systems seemed highly lucrative compared to maize and wheat. Therefore, it is anticipated that integration of legumes in the systems could enrich soil as well as it would be beneficial to farmers because of nutritional status attractive price in the market of these crops. DOI: http://dx.doi.org/10.3126/ajn.v1i0.7543 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.61-66
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Jackai, L. E. N., and S. Oghiakhe. "Pod wall trichomes and resistance of two wild cowpea, Vigna vexillata, accessions to Maruca testualis (Geyer) (Lepidoptera: Pyralidae) and Clavigralla tomentosicollis Stål (Hemiptera: Coreidae)." Bulletin of Entomological Research 79, no. 4 (November 1989): 595–605. http://dx.doi.org/10.1017/s0007485300018745.
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AbstractExperiments were conducted to investigate the role of pubescence in the resistance of two wild cowpea varieties, TVNu 72 and TVNu 73, to feeding and damage caused by two cowpea pests, Maruca testulalis (Geyer) and Clavigralla tomentosicollis Stål. The fine structure of the trichomes was also studied by electron microscopy in order to try to determine the role played by trichomes in the resistance of these varieties to both pests. Feeding and development were deterred in both insects on pods of TVNu 72 and TVNu 73 with or without trichomes compared to the susceptible variety, IT84E-124. In M. testulalis, the same effect was observed on seeds and flowers. However, M. testulalis larvae fed and developed better, as indicated by the higher growth index values, when trichomes were removed. Growth index estimates showed a 13-fold decrease when trichomes were left intact on both TVNu 72 and TVNu 73 compared to the cultivated susceptible control. It was concluded that resistance to M. testulalis was based on trichomes in the first instance (as a first line of defence) and phytochemicals. Survival of C. tomentosicollis nymphs was not affected by trichome removal even though adult feeding damage was slightly increased. This is explained in line with previous reports which indicate that phytochemicals may be the principal factor in the resistance of TVNu 72 and TVNu 73 to this species. Glandular and non-glandular trichomes were found to be present on both the cultivated and wild cowpea. Trichomes in the two types of cowpea differ significantly only in trichome number (susceptible cultivated cowpeas have more) and non-glandular trichome length (those on wild cowpea are ca 20 times longer). Trichome length and angle to pod surface seemed to be more important than density per se.
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Umogbai, V. I., and A. Shehu. "Development and Performance Evaluation of a Manually Operated Cowpea Thresher." Advanced Materials Research 62-64 (February 2009): 239–46. http://dx.doi.org/10.4028/www.scientific.net/amr.62-64.239.
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Threshing is one of the major problems associated with cowpea production in Nigeria. In spite of the food and nutritional importance of the crop to human diet, its threshing has been and remains a serious problem to the farmers. The techniques for threshing cowpea in most rural areas are still the traditional methods of seed separation which are uneconomical, labourous and time consuming. A manually operated cowpea thresher to stimulate manual threshing has been designed, fabricated and tested. The thresher was fabricated using locally available materials at the engineering workshop of the University of Agriculture, Makurdi. Two varieties of cowpea (B301 and C70) were tested on the thresher for performance evaluation in terms of thresher efficiency and mechanical (visible) damage. The test results revealed that for optimum performance, the thresher should operate at a cylinder speed of between 60-75rpm at a feed rate of 24kg/hr.94%-97% threshing efficiency was achieved for the two varieties of cowpea. The cost of production is N15,686:00
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Nkomo, Gabriel Vusanimuzi, MM Sedibe, and MA Mofokeng'. "Farmers’ production constraints, perceptions and preferences of cowpeas in Buhera district, Zimbabwe." African Journal of Food, Agriculture, Nutrition and Development 20, no. 06 (October 31, 2020): 16832–57. http://dx.doi.org/10.18697/ajfand.94.19795.
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Many smallholder farmers face crop production constraints, especially under rapidly changing climatic conditions. A survey was carried out to assess farmers’ production constraints, traits, and preferred cowpea varieties. A semi-structured questionnaire was used in a survey of Buhera District, Zimbabwe, in March and April of 2018. Women farmers dominated the survey as they were 52% of the surveyed population, while men occupied 48% of the total population. Eighty-three percent of farmers cited the shortage, unavailability, and cost of fertiliser. Sixteen per cent of farmers acknowledged that they do not have access to quality seeds, and 1% cited labour as the major constraint in cowpea production. Cowpea yield varied from 100 to 500 kg/ha. However, 48% of farmers harvested 200 kg/ha.As for abiotic factors, farmers ranked heat (86%), drought (10%), and soil fertility (4%) as the most important abiotic factors.Ninety-one percent of farmers ranked rust as the most destructive disease, while 2% ranked storage rot, 1% ranked anthracnose, and 1% ranked downy mildew. Eighty-one percent of farmers cited aphids as the main pests, while 3% ranked thrips, 3% ranked legume borers, and 2% ranked pod borers as other pests.Fifty-two percent of farmers preferred varieties that are resistant to diseases such as rust, whereas 48% were not concerned about diseases.As for qualitative traits, 50% of farmers had no specific colour preference, 32% preferred white colour, 14% preferred brown colour, 3% preferred red colour, and 1% preferred tan colour. For quantitative traits, such as grain size, pod size, plant height, and head size, the preferences of farmers varied. Ninety-nine percent of the farmers interviewed preferred cowpea varieties that are bred for drought tolerance, as Buhera District is frequented by intermittent droughts. Farmers’ experience in growing cowpeas ranged from 5 to 30 years. The top ranked accessions were CBC1, IT 18, and Chibundi Chitsvuku,while the least ranked was Kangorongondo. Identified constraints to cowpea farming included lack of education,insect pests, diseases, drought, weeds, harvesting difficulties and a lack of agriculture extension advice. The survey showed that there is a need to breed for biotic factors such as pests and diseases and abiotic factors such as drought and moisture stress.
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Akanwe Asiwe, Joseph Nwafor. "Yield and Economic Assessments of Five Cowpea Varieties in Cowpea-Maize Strip Intercropping in Limpopo Province, South Africa." International Journal of Agriculture and Biology 25, no. 01 (January 1, 2021): 27–32. http://dx.doi.org/10.17957/ijab/15.1634.
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Farmers‟ traditional cropping practice in Limpopo Province is to mix and broadcast crops at planting without definite row arrangement. Although this practice is very easy and cost-saving, it leads to low plant density, hinders farm input application, and results in low crop yields and poor return on investment. Strip intercropping, where crops are planted with definite row arrangement, reduces inter-species competition, optimises plant population, and increases crop yield. Five cowpea varieties i.e. „TVu 13464‟, „IT86D-1010‟, „Glenda‟, „IT82E-16‟ and „IT87K-499-35‟ and maize was grown under strip intercropping, monocropping, and mixed intercropping as a control during two seasons. During both years, significant interactions were obtained between the cowpea varieties and the cropping systems in most of the variables measured. Cowpea sown in the strip intercropping performed better compared those sown in mixed intercropping. Cowpea varieties „IT86D-1010‟, „IT82E-16‟ and „IT87K-499-35‟ harvested more grain yield under monocropping and strip intercropping than under mixed intercropping. The land equivalent ratio (LER) of strip intercropping during the two seasons ranged between 1.25 and 2.29 and was higher compared to mixed intercropping, which ranged between 0.50 and 1.32. In conclusion, cowpea varieties „IT86D-1010‟, „IT82E-16‟ and „IT87K-499-35‟ sown with maize as strip intercropping resulted more profits under intercropping systems and were recommended for cultivation by farmers in the Limpopo region with low rainfall. Moreover, grain yield, LER, and net profit achieved by strip intercropping was three-fold more than mixed intercropping. © 2021 Friends Science Publishers
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Simões-Araújo, Jean Luiz, Norma Gouvêa Rumjanek, and Márcia Margis-Pinheiro. "Small heat shock proteins genes are differentially expressed in distinct varieties of common bean." Brazilian Journal of Plant Physiology 15, no. 1 (April 2003): 33–41. http://dx.doi.org/10.1590/s1677-04202003000100005.
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Plants respond to temperature stress by synthesizing a set of heat shock proteins (HSPs), which may be responsible for the acquisition of thermotolerance. In this study, the induction of small HSPs (sHSPs) in eight common bean varieties was evaluated by Northern blot analysis using the W HSP 16.9 cDNA as heterologous probe. Cowpea was used, as a positive control since this plant, as opposed to common bean, is known to grow well under high temperature regimes such as that found in the Brazilian semi-arid region. After the growth period, the plants were submitted to two h of heat shock at 40 ºC. All varieties tested were able to induce sHSP mRNAs that hybridized with W HSP 16.9 probe. However, significant kinetic differences were found when comparing different varieties. SHSP mRNA levels induced after heat shock in cowpea was higher than the levels observed on the bean varieties displaying the highest expression of these proteins. Besides, the sHSP expression was also assessed at the protein accumulation level by Western-blot analysis for cowpea and both IPA 7 and Negro Argel varieties of bean plants. The revealed protein pattern confirmed that sHSPs are differentially expressed in distinct varieties of common bean according their heat stress tolerance.
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Dingha, Beatrice N., Paul C. Omaliko, Barbara A. Amoah, Louis E. Jackai, and Deepak Shrestha. "Evaluation of Cowpea (Vigna unguiculata) in an Intercropping System as Pollinator Enhancer for Increased Crop Yield." Sustainability 13, no. 17 (August 26, 2021): 9612. http://dx.doi.org/10.3390/su13179612.
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Production of pollinator-dependent crops (PDCs) is increasing. However, pollinators are declining partly due to loss of floral resources. There is urgency to mitigate this decline and the potential risks to the production of PDCs and food security. One way is by promoting farming systems that enhance flower-rich habitats. In a two-year study, Pinkeye Purple Hull and Whippoorwill cowpea varieties attractive to pollinators were intercropped with three PDCs (squash, okra, and watermelon). We evaluated whether cowpea intercrop increases the abundance and diversity of pollinators, other beneficial insects, and crop yield, and decreases the abundance of the brown marmorated stink bug (BMSB). Diverse pollinators were recorded in both years for a total of 80,379, representing seven pollinator families (Andrenidae, Apidae, Crabronidae, Formicidae, Halictidae, Tachinidae, and Vespidae) captured in pan traps, six families (Apidae, Crabronidae, Halictidae, Pyralidae, Tachinidae, and Vespidae) from sticky traps, and five pollinator types (bumble bees, carpenter bees, honeybees, butterflies and moths, and wasps) through direct visual count. Pollinator abundance and diversity was highest on the cowpea-intercropped treatments than controls. PDCs intercropped with cowpea recorded more beneficial insects than BMSB. Okra, squash, and watermelon intercrops produced 7%, 27%, and 54% more fruits than the control, respectively. Our findings indicate that intercropping cowpeas with PDCs attracted more and diverse pollinators and resulted in increased crop yield. However, to optimize pollination, factors such as planting dates to synchronize the flowering of both cowpeas and PDCs should be taken into consideration.
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OLIVEIRA, GLAUCE PORTELA DE, DRYELLE SIFUENTES PALLAORO, ELISANGELA CLARETE CAMILI, and ÂNDREA CARLA DALMOLIN. "PHYSICAL AND BROMATOLOGICAL CHARACTERISTICS OF COWPEA VARIETIES PREFERRED BY Callosobruchus maculatus (COLEOPTERA: BRUCHIDAE) 1." Revista Caatinga 31, no. 2 (June 2018): 515–22. http://dx.doi.org/10.1590/1983-21252018v31n229rc.
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ABSTRACT Cowpea is an herbaceous legume susceptible to several insects and diseases; and the beetle Callosobruchus maculatus is the main pest causing direct losses in the production of this crop. The objective of this work was to assess the physical and bromatological characteristics of beans of cowpea varieties (Bico-de-Ouro, BRS-Novaera, BRS-Guariba and BRS-Tumucumaque) preferred by C. maculatus. Adults of C. maculatus were obtained from a storage unit of cowpea beans. The physical and bromatological characteristics and attractiveness of cowpea beans to insects were evaluated in laboratory. The preferences for oviposition with no choice and attraction to cowpea beans by C. maculatus are not related to the high protein content or physical characteristics of the bean seed coat (thickness and fiber content), since the insects were more attracted to beans of the variety Bico-de-Ouro, which had low crude protein content, the thickest seed coat and high NDF content.
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Messina, Frank J., J. A. A. Renwick, and Joyce L. Barmore. "RESISTANCE TO APHIS CRACCIVORA (HOMOPTERA:APHIDIDAE) IN SELECTED VARIETIES OF COWPEA." Journal of Entomological Science 20, no. 2 (April 1, 1985): 263–69. http://dx.doi.org/10.18474/0749-8004-20.2.263.
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Nearly 200 varieties of cowpea, Vigna unguiculata (L.) Walp, were screened for resistance to the cowpea aphid, Aphis craccivora Koch. Three varieties known to be resistant in West Africa were highly susceptible to an aphid population from the southern United States. Four other varieties, however, inhibited growth of the southern United States population both in the laboratory and in the field. Life-table comparisons using a resistant and a susceptible variety revealed a three-fold difference in the intrinsic rate of increase and a more than twenty-fold difference in the net reproductive rate. High nymphal mortality and low fecundity on resistant plants were largely responsible for these differences.
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Echendu, T. N. C., and A. E. Akingbohungbe. "Intensive free-choice and no-choice cohort tests for evaluating resistance to Maruca testulalis (Lepidoptera: Pyralidae) in cowpea." Bulletin of Entomological Research 80, no. 3 (September 1990): 289–93. http://dx.doi.org/10.1017/s0007485300050483.
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AbstractA method for intensive screening of cowpea for resistance to Maruca testulalis (Geyer) is described. It is capable of ensuring uniform infestation and thus eliminating problems due to escapes. Four cowpea varieties earlier identified from field screening trials as resistant (TVU 946, TVU 1896 AG, H 51–1 and 2 AK) and three susceptible varieties (Ife Brown, H 144–1 and 58–185) were screened using this method. The results confirmed the status of the resistant varieties. Some effects on M. testulalis included, non preference for oviposition and larval feeding, and antibiosis manifested by reduced final larval instar weight, elongated pupal period and smaller sized emerging adult females.
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Baidoo, P. K., and M. B. Mochiah. "Varietal Susceptibility of Improved Cowpea Vigna unguiculata (L.) (Walp.) Cultivars to Field and Storage Pests." Sustainable Agriculture Research 3, no. 2 (March 26, 2014): 69. http://dx.doi.org/10.5539/sar.v3n2p69.
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<p>Cowpea, <em>Vigna unguiculata</em> is widely cultivated in the tropics and subtropics as food for man and livestock. The crop is highly prone to pests and diseases which limit its production. Resistant cowpea varieties have become increasingly important in the management of both field and storage pests. Three improved cowpea varieties and one local variety were screened for their susceptibility to field and storage pests. The experiment was conducted in a randomized complete block design with four treatments and three replications. The different pests infesting the plants were identified and counted. Aphids and thrips were scored on a scale of 0-5, depending on the levels of infestations. Natural enemies’ numbers, leaf damage, pod damage and yield were assessed. <em>Callosobruchus maculatus</em> infestations during storage and weight reduction were determined over a six week period. Aphids and <em>M. sjostedti</em> score, <em>M. virtrata</em> and <em>Empoasca</em> sp. numbers did not differ significantly; however, significantly more pod sucking bubs attacked the local variety than the improved varieties. Natural enemies’ numbers on the various cultivars did not differ significantly. Yield was however significantly better in the improved varieties. The local variety suffered the largest weight reduction (20.91%) during storage while Nhyira suffered the least weight reduction of 4.23%. The use of improved varieties and application of pests’ control measures will increase cowpea production in Ghana.</p>
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Akanwe Asiwe, Joseph Nwafor. "Productivity of Phosphorus Fertilization in Cowpea-Maize Strip Intercropping under Rainfed Conditions." International Journal of Agriculture and Biology 26, no. 02 (August 1, 2021): 270–76. http://dx.doi.org/10.17957/ijab/15.1834.
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Crop yields are declined due to low soil fertility, insufficient soil water availability and poorly managed cropping systems in Limpopo province of South Africa. Phosphorus (P) is a major essential nutrient element required by crops for enhanced growth and development. Interactions between different rates of P fertilization and strip intercropping system have not been studied in detail under rainfed conditions in semi-arid region of Limpopo province. Therefore, this study was conducted to assess the performance of four cowpea varieties at four levels (0, 15, 30, 45 kg P ha-1) of P fertilization in a cowpea-maize intercropping system in a split-split plot design during two seasons. Significant interactions were obtained between variety and phosphorus application as well as variety and cropping system for 90% physiological maturity, root mass and grain yield in both seasons. P levels significantly influenced and enhanced grain yield, land equivalent ratio, profit and benefit cost ratio achieved. PAN311 and TVu13464 matured earlier across P levels and they were selected promising cowpea varieties based on their early maturity and high yield. Land equivalent ratio values were greater than 1.0, which indicated performance and advantage of an intercropping system over monocropping system in land utilisation. The optimum P level for cowpea-maize strip intercropping was at 30 kg P ha-1 based on yield and financial return. The results showed that P application enhanced the productivity of the cowpea varieties in cowpea-maize strip intercropping in the semi-arid environment of Limpopo province. © 2021 Friends Science Publishers
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Sombie, Pierre A. E. D., Ibrahim Ouedraogo, Jean Baptiste D. L. S. Tignegré, Adama Hilou, Tinga J. Ouedraogo, and Martin Kiendrébéogo. "Genotypic Variation of Mineral Elements and Phytate Levels of Thirty Cowpeas (Vigna unguiculata L. Walp.) Varieties Cultivated in Burkina Faso." Journal of Food Chemistry and Nutrition 6, no. 1 (July 15, 2018): 13–20. http://dx.doi.org/10.33687/jfcn.006.01.2343.
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Cowpea is consumed as a staple food in many developing countries. The present study was undertaken to determine the variation in mineral elements and phytate concentrations in 30 cowpeas seeds varieties consumed in Burkina Faso. The composition of the thirty cowpeas seeds in total mineral varies from 5.08 % ± 0.00 to 3.55 % ± 0.08. The genotype CR06-07 showed the high content of total mineral (ashes) and the genotype Kondesyoungo local, the low content of ashes. IT81D-994 showed the high content of iron (7.07 ± 0.057 mg/100g of seeds dw), zinc (4.42 ± 0.012 mg/100 g of seeds dw), magnesium (239.80 ± 1.192 mg/100 g of seeds dw), calcium (123.39 ± 2.31 mg /100 g of seeds dw) and potassium (1201.97 ± 25.66 mg/100 g of seeds dw). Na and Se levels in the seeds showed about 4.5-fold and 7.6-fold variations between the cowpeas varieties. The genotype komcallé showed the high content of sodium (5.45 ± 0.20 mg/100 g of seeds dw) and the genotype KVx 414-22-2 had the high content of selenium (0.006 ± 0.0002 mg/100 g of seeds dw). The phytate content of the cowpeas genotypes varied from 555.61 ± 7.48 for TVU 14676 to 13.50 ± 1.14 mg/100 g of seeds dw for KVx 30-309-6G. The [Phy]/[Fe], [Phy]/[Zn], [Phy]/[Ca] and [Phy] x [Ca]/[Zn] ratios showed that the phytate content might compromise the Fe, Zn and Ca bioavailability in some cowpeas varieties. This study indicates that the cowpeas varieties might be considered as mineral source suitable for animal and human consumption.
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Ekhuemelo, C., H. U. Igbor, and S. J. Ocheje. "Screening of Cowpea (Vigna unguiculata ( L.)Walp) Varieties for Resistance to Leaf Spot in Southern Guinea Savannah Agro- Ecology of Nigeria." Nigerian Journal of Biotechnology 36, no. 2 (March 12, 2020): 9–20. http://dx.doi.org/10.4314/njb.v36i2.2.
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Five cowpea varieties (Vigna unguiculata (L.) Walp) namely UAM 09 1055-6, UAM 09 1051-1, IT 99k-573-1-1, IT 90k-277-2 and IT 99k-573-2-1 were investigated for fungi associated with the seed, leaf spot disease incidence and severity in Makurdi (07o 45’- 7o 50’N and 08o 45’ - 08o 50’E ; 98 m)and Otobi (7°07’ - 7°11'N and 8° 05- 8°10'E) in Benue State, Nigeria under natural infection. The effect ofleaf spot incidence and severity on the growth and yield of cowpea varieties were also evaluated. Fungi associated with the seeds and leaf spot lesions were isolated and identified. Diseased leaf samples from the study locations were found to be infected with Fusarium verticillioides, Curvularia lunata, Aspergillus tamarii Kite, Lasiodiplodia theobromae, Aspergillus flavus Link and Aspergillus niger van Tiegh, Pythium spp, Fusarium solani, Macrophomina phaseolina and Phoma sp. Otobi field had significantly higher incidence and severity of leaf spot disease than the Makurdi field. Cowpea variety IT 99k-573-1-1, IT 99k-573-2-1 and IT 90k-277-2 were classified as moderately resistant in Makurdi with a mean incidence of 22.23%, 16.97% and 16.67% respectively while varieties UAM 09 1051-1 and UAM 09 1055-6 were classified as Moderately susceptible and Highly susceptible with mean leaf spot incidence of 41.67% and 99.17% respectively. In Otobi, all the cowpea varieties screened were classified as Susceptible to leaf spot incidence with the exception of variety IT 90k-277-2 which was classified as moderately susceptible to leaf spot disease.
Key words: Cowpea, leaf spot, screening, resistant, susceptible.
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Marfo, K. O. "Evolving insect pest resistant cowpea varieties in Ghana." International Journal of Tropical Insect Science 6, no. 03 (June 1985): 385–88. http://dx.doi.org/10.1017/s1742758400004677.
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Fatokun, Christian A., Ousmane Boukar, and Satoru Muranaka. "Evaluation of cowpea (Vigna unguiculata (L.) Walp.) germplasm lines for tolerance to drought." Plant Genetic Resources 10, no. 3 (August 9, 2012): 171–76. http://dx.doi.org/10.1017/s1479262112000214.
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Cowpea is an important grain legume crop in sub-Saharan Africa (SSA) where, on a worldwide basis, the bulk is produced and consumed. The dry savanna area of SSA is where cowpea is mostly grown under rain-fed conditions. The crop is therefore prone to drought which may occur early, mid and/or late in the cropping season. Compared with many other crops, cowpea is drought tolerant, even though drought is still a major constraint limiting its productivity in SSA. Increasing the level of drought tolerance in existing cowpea varieties grown by farmers would enable them to obtain more and stable yield from their cowpea fields. As a first step towards enhancing drought tolerance in existing cowpea varieties, 1288 lines were selected randomly from cowpea germplasm collections maintained at the International Institute of Tropical Agriculture, and evaluated for their drought tolerance at Ibadan. Drought was imposed by withdrawal of irrigation from 5 weeks after sowing. On average, drought reduced the number of days to flower by 12 d, and the mean grain yield per plant was also reduced by 67.28%. A few of the cowpea lines stayed green for up to 6 weeks after irrigation was stopped, even though some of these produced no pods when the study was terminated. Further evaluation in the screenhouse of 142 selected drought-tolerant lines helped to identify six lines that could be potential parents for developing breeding lines with enhanced drought tolerance.
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Silva, Fernando Henrique Alves da, Salvador Barros Torres, Sara Monaliza Costa Carvalho, Manuela Bai, and Welder de Araújo Rangel Lopes. "PHYSICAL AND PHYSIOLOGICAL ATTRIBUTES OF SAVED COWPEA SEEDS USED IN THE BRAZILIAN SEMI-ARID REGION." Revista Caatinga 32, no. 1 (March 2019): 113–20. http://dx.doi.org/10.1590/1983-21252019v32n112rc.
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ABSTRACT This study evaluated the physical and physiological attributes of saved cowpea seeds (Vigna unguiculata L. Walp.) used in the Brazilian semi-arid area and compared them with certified seed varieties. The study tested 37 saved seed samples from the state of Rio Grande do Norte and two varieties of certified seeds (“BRS Guariba” and “BRS Pujante”) from the production field of Embrapa Products and Market, Petrolina, PE, Brazil. The seeds were tested for moisture, hectoliter weight, weight of 1,000 seeds, and physical purity to evaluate the physical quality. Germination, first germination count, field emergence, emergence rate index, shoot dry mass, and accelerated aging were tested for physiological quality. The saved cowpea seeds showed great differences, suggesting the influence of genetic variability and different growing environments. The use of saved cowpea seeds by small farmers in the semi-arid areas of Northeastern Brazil is impractical, because these seeds have inferior physical and physiological qualities compared to certified cowpea seeds.
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Ujianto, Lestari, NFN Idris, and Uyek M. Yakop. "Kajian Heritabilitas dan Heterosis pada Persilangan antara Kacang Tunggak dengan Kacang Panjang." Buletin Plasma Nutfah 18, no. 1 (October 11, 2016): 9. http://dx.doi.org/10.21082/blpn.v18n1.2012.p9-17.
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<p>Study of Heritability and Heterosis on Hybridization between Cowpea and Longbean. Lestari Ujianto, Idris, and Uyek M. Yakop. The objectives of this research were to study the success rate of crossing and heritability on interspecific hybridization between several NTB local varieties of cowpea and several varieties of long bean. This research consisted of 3 stages i.e. (1) hybridization between cowpea and long bean; (2) evaluation of F1 generation; (3) backcrossing between F1 with both parents. The observed data is analyzed to estimate the degree of crossability, value of broad sense heritability, coefficient of genetic variance. The result of this research indicated that: (1) interspecific crossing between cowpea NTB local varieties and long bean have different degree of successful with range 31 to 57% as well as on back crossing degree of successful with range 35 to 61%; (2) the characteristic of pod length and plant height indicated the high broad sense heritability value, and (3) there was hybrid vigor for diameter of pods on all cross combinations with heterosis and heterobeltiosis values ranging 11.4-27.0% and10.1-18.9% respectively.</p><p> </p><p><strong>Abstrak</strong></p><p><strong></strong>Tujuan penelitian adalah untuk mengkaji tingkat keberhasilan persilangan, pendugaan gejala heterosis dan daya waris sifat pada persilangan antarspesies beberapa varietas kacang tunggak lokal NTB dengan beberapa varietas kacang panjang. Penelitian terdiri atas tiga tahap kegiatan, yaitu (1) persilangan kacang tunggak dan kacang panjang; (2) evaluasi hasil persilangan antara kacang tunggak dan kacang panjang; (3) silang balik antara hasil persilangan yang unggul dengan kedua tetuanya. Data hasil pengamatan dianalisis untuk menduga tingkat keberhasilan persilangan, pendugaan nilai heritabilitas arti luas, dan pendugaan koefisien keragaman genetik. Hasil dari penelitian menunjukkan bahwa (1) persilangan antarspesies kacang tunggak varietas lokal NTB dengan kacang panjang memiliki tingkat keberhasilan persilangan yang berbeda berkisar antara 31-57%. Demikian juga untuk silang balik tingkat keberhasilan persilangannya berkisar antara 35-61%; (2) sifat panjang polong dan tinggi tanaman menunjukkan nilai duga heritabilitas arti luas yang tinggi; (3) terdapat vigor hibrida untuk diameter polong pada semua pasangan persilangan dengan nilai heterosis berkisar antara 11,4-27,0% dan nilai heterobeltiosis 10,1-18,9%.</p>
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Mohammed, Z. S., A. I. Matinja, H. Tijjani, A. Abdullahi, M. A. Dangambo, and J. Salihu. "Quantitative determination of water soluble vitamins, minerals and proximate compositions of three varieties of beans in Bauchi State Nigeria." Global Journal of Pure and Applied Sciences 25, no. 2 (September 6, 2019): 123–33. http://dx.doi.org/10.4314/gjpas.v25i2.1.
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The quantitative determination of water soluble vitamins, minerals and proximate compositions of three varieties of beans in Bauchi State, Nigeria, was carried out in this study. Three varieties of beans which includes one of the most commonly consumed species of cowpea (Vigna unguiculata) locally called Kanannade, the least consumed (most rare) specie of cowpea (Vigna unguiculata) locally called gayan-gayan and soybean (Glycine max) locally called waken soya found in Bauchi State, Nigeria were analysed. Results for the determination of the proximate composition shows that soybean (Glycine max) among three different samples had the highest protein content (34.21 %), ash content (3.11 %), Crude fat (25.30 %). While Cowpea (kanannade) has the highest Carbohydrate content (58.04 %) and Cowpea (gayan-gayan) has the highest Moisture contents (12.43 %) respectively. Soya bean has the highest contents of vitamin (B1, B3, and B6) for the three water soluble vitamins analysed although the values obtained were less than the recommended dietary allowance recommended by the World Health Organization (WHO). In the Mineral composition of the two species of cowpea beans (Vigna unguiculata), and soybean analysed, soybean had the highest content of most of the mineral elements. The concentration of potassium was found to be very much higher than all the other mineral elements that were determined in all the samples. The results from this analysis shows that the three varieties of beans analyzed were found to be rich in minerals and highly nutritious.Keywords: Vigna unguiculata, Glycine max, vitamins, minerals and proximate composition
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Timitey, A., L. Adinsi, YE Madodé, F. Cissé, N. Akissoé, and DJ Hounhouigan. "Pratiques de production et caracteristiques physiques et chimiques du shô basi, un couscous de niebe (Vigna unguiculata) produit au Mali." African Journal of Food, Agriculture, Nutrition and Development 21, no. 02 (March 24, 2021): 17509–28. http://dx.doi.org/10.18697/ajfand.97.19475.
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In West Africa, cowpea is processed into several end-products among which the most consumed in Mali is a steamed granulated product known as cowpea couscous or Shô basi, in Bambara. Organoleptic properties ofShô basi are variable, probably as a consequence of the diversity of the practices of production. This study aims at determining these practices, their constraints and the physico-chemical characteristics of Shô basi as sold on Malian markets. A survey using focus group discussions, and involving eighteen (18) Shô basi production cooperatives, each gathering 8 to 32 members, was conducted in South Mali. The information collected was related to cowpea varieties used for production, flow diagrams, constraints of production, and quality criteria of the end-products. Eighteen (18) Shô basi samples were collected from the interviewed groups and used for the determination of the physical and chemical properties of Shô basi. Results showed that most of the processors were married, non or moderately literate and aged between 20 and 59 years women. The main cowpea varieties used for the production are sangaraka and wilibali, both from the species Vigna unguiculata. Both varieties of cowpea are characterized by a white or cream color. Shô basi is produced using a single process with two major technological variants. One involves a wet total dehulling (VDT), whereas the second involves a dry partial dehulling (VDP) of cowpea seeds. Regardless of the technological variant and cowpea variety used, interviewees indicated that a good qualityShô basi must have a light color, a soft mouthfeel texture, a homogeneous granule size and lacking beany flavor. Protein(25,0g/100g) and polyphenol (24,3mg/100g)contents as well as swelling level were similar for Shô basi from both variants. However, Shô basi from technology involving partial dehulling (VDP) was less bright, richer in fiber and minerals, and contained more fine granules thanShô basi involving whole dehulling(VDT). Cowpea dehulling, flour granulation, steam cooking and drying are the mean constraints for quality standardization and large-scale production of Shô basi in Mali.
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Ishikawa, Haruki, Issa Drabo, Batieno B. Joseph, Satoru Muranaka, Christian Fatokun, and Ousmane Boukar. "Characteristics of farmers’ selection criteria for cowpea (Vigna unguiculata) varieties differ between north and south regions of Burkina Faso." Experimental Agriculture 56, no. 1 (July 18, 2019): 94–103. http://dx.doi.org/10.1017/s001447971900019x.
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SummaryComparative analysis of preferences and key criteria for selecting cowpea (Vigna unguiculata L. Walp.) varieties was conducted using the data collected from farmers’ participatory varietal selection (FPVS) activities conducted over 3 years with a total of 2401 farmers (1230 male and 1171 female) in 13 villages in Tougouri department in northern region and Tiéfora department in southern region of Burkina Faso in West Africa. Over the 3 years, farmer criteria for variety selection remained basically stable, but some variations among the regions and years were noticed. Grain yield was the most common and the most important criterion for farmers’ choice in both regions. Farmers in Tougouri (north) put more emphasis on early maturity (90%) and drought resistance (19.7%) as selection criteria than farmers in Tiéfora (south). Farmers in Tiéfora placed statistically significant importance on seed colour and plant type, while farmers in Tougouri did not, and for these selection criteria, there were only slight differences between genders in both areas. Results of stepwise multiple regression indicated that maturity and seed colour in the north, and seed size and seed colour in the south were the most important selection factors for farmers to select cowpea varieties. Improved varieties should have sufficiently good yield to be accepted, but other favoured traits may differ by target region as a reflection of local and regional market demands as well as deep-rooted cultural preferences. Understanding local and regional differences in selection criteria for cowpea varieties is necessary to improve the acceptance of newly released improved varieties. Preferences identified in the participatory activities could inform further development of cowpea breeding strategies for north and south regions of Burkina Faso.
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Enciso Garay, Cipriano Ramón, Cesar Caballero Mendoza, Daniel González, Jenny Dueck Toews, José Maria González Balbuena, Victoria Rossmary Santacruz Oviedo, and Fanni Ruiz. "Producción de variedades de poroto en dos localidades del Chaco Central." Investigación Agraria 17, no. 1 (June 1, 2015): 18–26. http://dx.doi.org/10.18004/investig.agrar.2015.junio.18-26.
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Rajendiran, K., L. Gowsalya, and J. Sudaroli Sudha. "In Vitro Screening of Stem Explants of In Situ Uv-B Irradiated Cowpea Varieties for Germplasm Storage." International Journal of Applied Sciences and Biotechnology 4, no. 1 (March 31, 2016): 44–52. http://dx.doi.org/10.3126/ijasbt.v4i1.14573.
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Even though seeds form the natural progenies of all sexually reproducing plants, change in climate makes it mandatory to device in vitro methods for selecting germplasm for conservation and regeneration. An experiment was conducted to induct callus in stem explants (nodal region from third node from top of canopy) harvested on 30 days after seed germination from in situ control and supplementary ultraviolet-B irradiated (UV-B = 2 hours daily @ 12.2 kJ m-2 d-1; ambient = 10 kJ m-2 d-1) three varieties of cowpea (Vigna unguiculata (L.) Walp.) viz. Gowmathi, Fola and NS-634 to assess their response to in vitro culture. Axillary bud initiation occurred only from GOWMATHI control stem explants, while callus induction occurred in GOWMATHI and FOLA control stem explants. Stem explants harvested from all the three UV-B stressed cowpea varieties did not proliferate callus. The nodal stem explants of the three varieties of cowpea are not the suitable materials for germplasm preservation for growing in UV-B elevated climate.Int J Appl Sci Biotechnol, Vol 4(1): 44-52
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FREITAS, THAISY GARDÊNIA GURGEL DE, PAULO SÉRGIO LIMA E. SILVA, JÚLIO CÉSAR DOVALE, ÍTALO NUNES SILVA, and EDICLEIDE MACEDO DA SILVA. "GRAIN YIELD AND PATH ANALYSIS IN THE EVALUATION OF COWPEA LANDRACES." Revista Caatinga 32, no. 2 (June 2019): 302–11. http://dx.doi.org/10.1590/1983-21252019v32n202rc.
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ABSTRACT Cowpea is a staple food in the Northeast of Brazil, thus, genetic improvement of this species is important. Samples of cowpea landraces were collected in the State of Rio Grande do Norte, Brazil, and the most promising ones were evaluated in the present study. The objective was to identify the most productive varieties and the characteristics that have greater direct effect on grain yield, for breeding purposes. Twelve landraces were evaluated using a randomized block design with five replications, in two experiments-one in the dry season, and other in the rainy season. However, water irrigation was used in both experiments, due to the almost total absence of rainfall in the rainy season. The Baraúna, and Carnaubais cowpea varieties were the most productive in both experiments. Campo Grande was the best variety found in the experiment carried out in the dry season. José da Penha, Lagoa de Pedra, Umarizal, and Upanema were the best varieties in the experiment carried out in the rainy season. The number of pods per plant was the characteristic that had greater direct effect on grain yield.
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Gnankambary, Karidiatou, Nerbéwendé Sawadogo, Zakaria Diéni, Téyouré Benoit Joseph Batieno, Jean Baptiste De Salle Tignegré, Mahamadou Sawadogo, and Tinga Jeremy Ouédraogo. "Assessment of Cowpea (Vigna unguiculata (L.) Walp.) Mutant Lines for Drought Tolerance." International Journal of Agronomy 2020 (October 10, 2020): 1–9. http://dx.doi.org/10.1155/2020/8823498.
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Cowpea provides the cheapest source of protein with an average range of protein content of 23–30%. However, cowpea growth, development, and yield are greatly affected by drought during flowering and pod filling in the sub-Sahelian areas. The best way to cope with this situation is to develop drought-tolerant cowpea varieties. The objective of this study was therefore to evaluate cowpea lines developed through mutagenesis using gamma radiation to assess their reaction under optimal and water-stressed conditions. The response of ten mutants-irradiated Moussa local was then evaluated in pots arranged in a split plot design in a screen house. Two conditions were applied with optimum and water-stressed conditions. The stress was applied for two weeks at flowering. Two cowpea varieties Gorom local (drought-tolerant) and Moussa local (susceptible) nonirradiated were used as checks. Thereafter, field trials under two different sowing dates were conducted to identify the best tolerant mutant line(s) using agromorphological and tolerance indicators. The results indicated that mutant lines (MoussaM51-4P10 and MoussaM43-20P14) exhibited better stress tolerance and produced higher yield under water stress conditions. Stress Tolerance Index (STI) was better to select cowpea mutant tolerant with higher yielding under moderate stress (SI = 35%). The study confirmed that water stress has a negative effect on cowpea seeds production and on leaf chlorophyll content. The high temperature during experiment increased water stress effect mainly on non-irradiated checks (Gorom local and Moussa local).
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Ouedraogo, Adelaїde P., Agyemang Danquah, Jean-Baptiste Tignegre, Benoit J. Batieno, Herve Bama, Dieudonne Ilboudo, Jeremy T. Ouedraogo, Jonathan N. Ayertey, and Kwadwo Ofori. "Participatory Rural Appraisal on Cowpea Production Constraints and Farmers’ Management Practices in Burkina Faso." Modern Applied Science 14, no. 11 (October 15, 2020): 9. http://dx.doi.org/10.5539/mas.v14n11p9.
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Success of cowpea cultivation requires a strong understanding of production constraints in order to overcome them. It is thus useful to know whether smallholder cowpea growers use modern or indigenous means to overcome these challenges. We completed a participatory rural appraisal (PRA) study to identify current cowpea production constraints and management practices in Burkina Faso. We interviewed 481 cowpea growers (219 women and 262 men) and used a mixed-method design of collecting both qualitative and quantitative data. The results showed that water scarcity, damage due to insects, plant diseases, striga, lack of training, and marketing challenges are the main constraints to cowpea production. Among insects reducing cowpea yield, growers identified aphids as a major pest. However, growers often did not know the biology and incidence of insects in their fields. This study also identified local resistant cowpea varieties in various locations.