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Journal articles on the topic 'Potatoes – Africa'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Ndou, Portia, Bridget Taruvinga, and Christian P. du Plooy. "The Viability and Potential of Smallholder Sweet Potato Enterprises as a Food Security Measure in Rural Communities of South Africa." Journal of Agricultural Science 12, no. 9 (2020): 74. http://dx.doi.org/10.5539/jas.v12n9p74.

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The Agricultural Research Council in partnership with the Department of Rural Development and Land Reform are engaged in promoting the establishment of sustainable Sweet Potato Enterprise projects in South Africa. This study sought to investigate the viability of smallholder sweet potato enterprises for the South African rural communities. Formal market surveys and Gross margin analysis were utilised in addressing the research questions. Results of the study indicate that both the sweet potato vine nurseries and growers stand a significant chance to gain considerable amount of income from swee

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2

Thompson, G. J., D. C. A. Hoffman, and P. J. Prins. "A deviant strain of potato virus Y infecting potatoes in South Africa." Potato Research 30, no. 2 (1987): 219–28. http://dx.doi.org/10.1007/bf02357664.

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3

Ozarslandan, A., Z. Devran, N. Mutlu, and I. H. Elekcioglu. "First Report of Columbia Root-Knot Nematode (Meloidogyne chitwoodi) in Potato in Turkey." Plant Disease 93, no. 3 (2009): 316. http://dx.doi.org/10.1094/pdis-93-3-0316c.

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Columbia root-knot nematode, Meloidogyne chitwoodi Golden et al., was identified from potatoes, Solanum tuberosum L., collected from Nigde Province, Turkey in September 2006. Seed potatoes are the most likely source for this introduction. The nematode is currently found to be infecting potatoes grown in the Netherlands, Portugal, Belgium, Germany, the United States, Mexico, South Africa, and Argentina. M. chitwoodi acquired a quarantine status in Europe (1) because of its potential to become established worldwide and its high damage probability. Some countries prohibit import of both seed and

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4

van der Waals, J. E., B. E. Pitsi, C. Marais, and C. K. Wairuri. "First Report of Alternaria alternata Causing Leaf Blight of Potatoes in South Africa." Plant Disease 95, no. 3 (2011): 363. http://dx.doi.org/10.1094/pdis-11-10-0820.

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During recent growing seasons, a new leaf blight was observed on potatoes (Solanum tuberosum L.) in various production regions in South Africa. Symptoms were observed before early blight, from 50 to 60 days after emergence of the potato plants. Typical leaf symptoms were small, circular, brown lesions, first visible on the abaxial sides of leaves. Lesions resembled those of early blight, but were smaller and did not show concentric rings. During favorable environmental conditions, severe infections were seen as coalesced lesions and blighted leaves and stems. Such severe infections occurred in

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5

Muzhinji, Norman, and Jacquie E. van der Waals. "Population Biology and Genetic Variation ofSpongospora subterraneaf. sp.subterranea, the Causal Pathogen of Powdery Scab and Root Galls on Potatoes in South Africa." Phytopathology® 109, no. 11 (2019): 1957–65. http://dx.doi.org/10.1094/phyto-12-18-0467-r.

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Spongospora subterranea f. sp. subterranea, causal agent of powdery scab and root galls of potatoes, occurs worldwide and is responsible for quality and yield losses in potato production in South Africa. Despite being one of the most important potato pathogens in South Africa, little information is available on the genetic structure and diversity of S. subterranea f. sp. subterranea, which could provide insight into the factors shaping its evolution and the role of inoculum sources in disease development. A total of 172 samples were collected from four potato growing regions in South Africa. A

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Thomson, Jennifer A. "The role of biotechnology for agricultural sustainability in Africa." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1492 (2007): 905–13. http://dx.doi.org/10.1098/rstb.2007.2191.

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Sub-Saharan Africa could have a shortfall of nearly 90 Mt of cereals by the year 2025 if current agricultural practices are maintained. Biotechnology is one of the ways to improve agricultural production. Insect-resistant varieties of maize and cotton suitable for the subcontinent have been identified as already having a significant impact. Virus-resistant crops are under development. These include maize resistant to the African endemic maize streak virus and cassava resistant to African cassava mosaic virus. Parasitic weeds such as Striga attack the roots of crops such as maize, millet, sorgh

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Muthoni, Jane, and Hussein Shimelis. "Heat and drought stress and their implications on potato production under dry African tropics." SEPTEMBER 2020, no. 14(9):2020 (September 20, 2020): 1405–14. http://dx.doi.org/10.21475/ajcs.20.14.09.p2402.

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The two most important abiotic factors affecting potato productivity in many areas of the world and especially in the dry African tropics are drought and high temperature. The situation is worsened by global warming. High temperature and drought reduce not only yields but also quality of potatoes. The effects of drought depend on the genotype, timing, duration and severity of the stress; plant emergence and tuberization are two critical periods when water stress most affects the final tuber yield. The susceptibility of potato crops to high temperature largely depends on genotype, development s

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8

Muzhinji, N., J. W. Woodhall, M. Truter, and J. E. van der Waals. "Variation in Fungicide Sensitivity AmongRhizoctoniaIsolates Recovered from Potatoes in South Africa." Plant Disease 102, no. 8 (2018): 1520–26. http://dx.doi.org/10.1094/pdis-09-17-1470-re.

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Rhizoctonia is a major pathogen of potato causing substantial yield losses worldwide. Control of Rhizoctonia diseases is based predominantly on the application of fungicides. However, little is known about the fungicide response variability of different Rhizoctonia anastomosis groups associated with potato diseases in South Africa. A total of 131 Rhizoctonia isolates were obtained from potato growing regions of South Africa from 2012 to 2014 and evaluated for sensitivity to fungicides in vitro and in vivo. The fungicides comprised six chemical formulations and one bio-fungicide representing se

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9

van der Waals, Jacquie E., Lise Korsten, and Bernard Slippers. "Genetic Diversity Among Alternaria solani Isolates from Potatoes in South Africa." Plant Disease 88, no. 9 (2004): 959–64. http://dx.doi.org/10.1094/pdis.2004.88.9.959.

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Genetic diversity among isolates of Alternaria solani, the causal agent of early blight of potato, from various potato-growing regions in South Africa (SA), was determined using virulence assays, vegetative compatibility (VC) tests, and random amplified microsatellite (RAMS) primers. The virulence assays showed low virulence levels for the largest part of the population, but failed to otherwise characterize the population diversity. The VC tests revealed 19 VC groups (VCGs), indicating a relatively high level of diversity among the isolates. There was little correlation between geographic orig

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10

van der Merwe, Johanna J., Teresa A. Coutinho, Lise Korsten, and Jacqueline E. van der Waals. "Pectobacterium carotovorum subsp. brasiliensis causing blackleg on potatoes in South Africa." European Journal of Plant Pathology 126, no. 2 (2009): 175–85. http://dx.doi.org/10.1007/s10658-009-9531-2.

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11

Mahbou Somo Toukam, Gabriel, Gilles Cellier, Emmanuel Wicker, et al. "Broad Diversity of Ralstonia solanacearum Strains in Cameroon." Plant Disease 93, no. 11 (2009): 1123–30. http://dx.doi.org/10.1094/pdis-93-11-1123.

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In 2005, an extensive survey of bacterial wilt in Cameroon collected 110 strains of Ralstonia solanacearum from wilting tomato, potato, pepper, huckleberry (Solanum scabrum), sesame, and amaranth. The genetic diversity and phylogeny of selected strains from Cameroon were assessed by multiplex–polymerase chain reaction (PCR), race 3/biovar 2–specific PCR, and sequence analyses of the mutS and egl genes. These data were compared with those from 33 reference strains covering the known diversity within the R. solanacearum species complex. Strains isolated in Cameroon clustered into three of the fo

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12

Scott, Gregory J., Ricardo Labarta, and Víctor Suarez. "Benchmarking Food Crop Markets in Southern Africa: The Case of Potatoes and Potato Products 1961–2010." American Journal of Potato Research 90, no. 6 (2013): 497–515. http://dx.doi.org/10.1007/s12230-013-9322-3.

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13

Witbooi, Hildegard, L. Kambizi, and O. Oguntibeju. "An alternative health crop for South Africa: Purple potato mini tuber production as affected by water and nutrient stress." African Journal of Food, Agriculture, Nutrition and Development 20, no. 06 (2020): 16818–31. http://dx.doi.org/10.18697/ajfand.94.19850.

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Food security in South Africa ranks as one of the top ten priorities in the country. Potato is a fundamental staple food crop in South Africa, providing essential nutrition. While there are several cultivars currently in production for the potato market, there is a need to explore cultivars that are available, but not utilised within the country. Pigmented potatoes are not regarded as high value on the South African market;however,yield prospects as well as health-promoting benefits could have a positive contribution on the South African Gross Domestic Product (GDP) and on the population’s hea

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M.D, Toungos, Kwaga Y.D, and Zambua B.W. "YIELD MAXIMIZATION OF SWEET POTATOES (Ipomoea batatas [L.] Lam) WHITE VS RED CULTIVARS IN YOLA, ADAMAWA STATE OF NIGERIA." International Journal of Research -GRANTHAALAYAH 7, no. 8 (2019): 250–57. http://dx.doi.org/10.29121/granthaalayah.v7.i8.2019.666.

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A Field experiment was conducted during the 2018 cropping season, at the Teaching and Research Farm of the Department of Agriculture Federal College of Education, (FCE) Yola. Yola is located in Northern Guinea Savanna Zone at latitude 9o14’ North and longitude 12o38’ East and altitude of 158m above sea level. The treatments for experiment consist of two potato cultivars (White and Red) which vines were obtained from the open market in Yola and slips prepared from previous year’s tubers. Complete Randomized Block Design (CRBD) was used and the treatments were replicated three (3) times. Both s

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15

Fisher, Madeline. "Two new varieties of Orange Sweet Potatoes show promise in South Africa." CSA News 60, no. 8 (2015): 10. http://dx.doi.org/10.2134/csa2015-60-8-2.

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16

Jordaan, Estiene, and J. E. van der Waals. "Streptomyces species associated with common scab lesions of potatoes in South Africa." European Journal of Plant Pathology 144, no. 3 (2015): 631–43. http://dx.doi.org/10.1007/s10658-015-0801-x.

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17

Hlerema, I. N., B. Taruvinga, S. M. Laurie, P. Ndou, B. Eiasu, and C. P. Du Plooy. "Cost Effectiveness and Influence of Storage Bag Type on the Quality of Sweet Potato Vines." Journal of Agricultural Science 10, no. 9 (2018): 47. http://dx.doi.org/10.5539/jas.v10n9p47.

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Sweet potatoes present an opportunity for improving food security and income generation in South Africa. The yield of sweet potatoes is highly dependent on the quality of sweet vines used in production. This study aimed at identifying the most cost effective and best storage bag type, between polyethylene and hessian bags, to prolong vine storage. Three bag treatments namely polyethylene bag without holes, polyethylene bag with 12 holes and dry hessian with vines from sweet potato cultivar “Bophelo” were stored for 3, 6, 9, 12 and 15 days at ambient temperature during summer. The costs effecti

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18

Dube, J. P., M. Truter, and J. E. van der Waals. "First Report of Resistance to QoI Fungicides in Alternaria alternata Isolates from Potato in South Africa." Plant Disease 98, no. 10 (2014): 1431. http://dx.doi.org/10.1094/pdis-03-14-0225-pdn.

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Since the first report of brown spot of potatoes (Solanum tuberosum) caused by Alternaria alternata (Fr.) Keissl in South Africa (3), disease intensity has steadily increased. No fungicides are registered for control of brown spot of potatoes in South Africa but growers attempt to control the disease with products registered for early blight, which include various QoI fungicides. Failure to control brown spot with QoI fungicides led to an investigation on putative development of resistance among A. alternata populations. In the summer of 2012, diseased leaves were collected from five potato gr

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19

Machakaire, A. T. B., J. M. Steyn, D. O. Caldiz, and A. J. Haverkort. "Forecasting Yield and Tuber Size of Processing Potatoes in South Africa Using the LINTUL-Potato-DSS Model." Potato Research 59, no. 3 (2016): 195–206. http://dx.doi.org/10.1007/s11540-016-9321-0.

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20

Ximba, S. P. F., J. D. Ibaba, and A. Gubba. "Potato virus Y strains infecting potatoes in the Msinga district in the province of KwaZulu-Natal, South Africa." Crop Protection 96 (June 2017): 188–94. http://dx.doi.org/10.1016/j.cropro.2017.02.010.

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21

Hagenimana, Vital, and Jan Low. "Potential of Orange-fleshed Sweet Potatoes for Raising Vitamin A Intake in Africa." Food and Nutrition Bulletin 21, no. 4 (2000): 414–18. http://dx.doi.org/10.1177/156482650002100414.

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22

Olusanya, NR, U. Kolanisi, A. Van Onselen, and N. Ngobese. "Preparation, storage, and utilization of mahewu (a non-alcoholic maize meal beverage) in Ntambanana, South Africa." African Journal of Food, Agriculture, Nutrition and Development 21, no. 02 (2021): 17492–508. http://dx.doi.org/10.18697/ajfand.97.18855.

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Maize is among the top three grain crops in the world. In Africa, especially Southern Africa,maize is the basic ingredient in fermented soft porridge known as Mahewu. Mahewu is a refreshing drink, produced at the household level using various practices and ingredients as a fermentation enhancer. The underprivileged consume Mahewuas the main meal of the day and hence, Mahewuisasource of dietary nutrients for many populations in Africa and South Africa. The ingredient and practices of making Mahewudiffer from one ethnic group to another. However, some of the indigenous practices are not well rep

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23

Darroch, MAG, and T. Mushayanyama. "Smallholder farmers’ perceptions of factors that constrain the competitiveness of a formal organic crop supply chain in KwaZulu Natal, South Africa." South African Journal of Economic and Management Sciences 9, no. 4 (2014): 498–520. http://dx.doi.org/10.4102/sajems.v9i4.1049.

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The 48 organic-certified members of the Ezemvelo Farmers’ Organisation in KwaZulu-Natal were surveyed during October-November 2004 to assess what factors they perceive constrain the competitiveness of a formal supply chain that markets their amadumbe, potatoes and sweet potatoes. They identified uncertain climate, tractor not available when needed, delays in payments for crops sent to the pack-house, lack of cash and credit to finance inputs, and more work than the family can handle as the current top five constraints. Principal Component Analysis further identified three valid institutional d

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24

Bruijn, G. H. de, and L. O. Fresco. "The importance of cassava in world food production." Netherlands Journal of Agricultural Science 37, no. 1 (1989): 21–34. http://dx.doi.org/10.18174/njas.v37i1.16651.

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The assumption that the importance of cassava in expanding food production in developing countries is increasing is questioned. Data for a 22-year period indicated that the only tuber crop gaining in importance on a world scale was potatoes. Cassava production had lagged behind population growth in Africa and the relative increase in production was lower than that of maize. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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25

Koua, Gisele, Thierry Zoue, Rose-Monde Megnanou, and Sebastien Niamke. "Nutritive Profile and Provitamin A Value of Sweet Potatoes Flours (Ipomoea batatas Lam) Consumed in Côte d’Ivoire." Journal of Food Research 7, no. 5 (2018): 36. http://dx.doi.org/10.5539/jfr.v7n5p36.

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Sweet potato is an important food security crop in Sub-Saharan Africa. In Côte d’Ivoire, the roots are widely consumed as supplementary staple food or secondary food. The present study is conducted to highlight the nutritive composition, antinutrients and β-carotene contents of local sweet potatoes consumed in Côte d’Ivoire. The nutritive properties and antinutritive factors of these sweet potatoes were investigated using standard methods. Results confirmed the energetic value (363±1.63-374.08±0.56 kcal/100 g DM) of whole sweet potato flour, mainly due to its high carbohydrate content (86.75±0

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Zarka, Kelly A., Ria Greyling, Inge Gazendam, et al. "Insertion and Characterization of the cry1Ia1 Gene in the Potato Cultivar Spunta for Resistance to Potato Tuber Moth." Journal of the American Society for Horticultural Science 135, no. 4 (2010): 317–24. http://dx.doi.org/10.21273/jashs.135.4.317.

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Potato tuber moth (Phthorimaea operculella) is a serious pest of potatoes in tropical and subtropical regions of the world, including South Africa. The cry1Ia1 gene (from Bacillus thuringiensis) under the control of the 35S cauliflower mosaic virus promoter was transformed into the potato (Solanum tuberosum) cultivar Spunta to develop a cultivar with resistance to potato tuber moth for release in South Africa. Two transformation events, ‘SpuntaG2’ and ‘SpuntaG3’, were selected and subjected to extensive molecular analyses as required by the regulatory agencies of South Africa. Southern hybridi

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Scott, Gregory J., Ricardo Labarta, and Víctor Suarez. "Booms, Busts, and Emerging Markets for Potatoes in East and Central Africa 1961–2010." Potato Research 56, no. 3 (2013): 205–36. http://dx.doi.org/10.1007/s11540-013-9240-2.

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28

Onkendi, E. M., and L. N. Moleleki. "Distribution and genetic diversity of root-knot nematodes (Meloidogynespp.) in potatoes from South Africa." Plant Pathology 62, no. 5 (2013): 1184–92. http://dx.doi.org/10.1111/ppa.12035.

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Muzhinji, Norman, James W. Woodhall, Mariette Truter, and Jacquie E. van der Waals. "Population genetic structure of Rhizoctonia solani AG 3-PT from potatoes in South Africa." Fungal Biology 120, no. 5 (2016): 701–10. http://dx.doi.org/10.1016/j.funbio.2016.02.009.

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30

Haugerud, Angelique, and Michael P. Collinson. "Plants, Genes and People: Improving the Relevance of Plant Breeding in Africa." Experimental Agriculture 26, no. 3 (1990): 341–62. http://dx.doi.org/10.1017/s0014479700018500.

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SUMMARYPlant breeders cannot respond to every quirk of farmers' circumstances but the relevance of breeding research in poor nations can be improved. Recent innovations in germplasm screening programmes for developing nations highlight important differences in selection criteria between farmers and scientists, and among farmers themselves. Drawing on the authors' African experience with International Agricultural Research Centres working on maize and potatoes, the paper explores how breeding programmes benefit from an understanding of farmers' own detailed knowledge about the crop varieties th

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Zimudzi, J., T. A. Coutinho, and J. E. van der Waals. "Pathogenicity of Fungi Isolated from Atypical Skin Blemishes on Potatoes in South Africa and Zimbabwe." Potato Research 60, no. 2 (2017): 119–44. http://dx.doi.org/10.1007/s11540-017-9345-0.

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Onkendi, E. M., and L. N. Moleleki. "Corrigendum: Distribution and genetic diversity of root-knot nematodes (Meloidogynespp.) in potatoes from South Africa." Plant Pathology 62, no. 5 (2013): 1192. http://dx.doi.org/10.1111/ppa.12053.

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Hermann, Yéboué Kouamé, Amoikon Kouakou Ernest, Kouamé Konan Joël, Zoho Bi Foua Guy Alexendre, and Essé Sonia Estelle. "EVALUATION OF NUTRITIONAL EFFECTS AND DIGESTIVE BALANCE OF THREE CASSAVA-DISHES COMMONLY CONSUMED IN CÔTE D'IVOIRE AT WISTAR RATS." International Journal of Research -GRANTHAALAYAH 6, no. 11 (2018): 50–58. http://dx.doi.org/10.29121/granthaalayah.v6.i11.2018.1088.

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Valuing local dishes can help eradicate undernourishment in west Africa. In this context, the aim of this study is to evaluate in wistar rat nutritional effects and digestive balance of attiéké, attoukpou and placali, three cassava-dishes, commonly consumed in Côte d'Ivoire. For this purpose, 5 diets were composed to conduct growth and digestive balance experiments in wistar rats. Staple foods of the five diets are cassava-based foods (attiéké, attoukpou and placali), potatoes starch and sucrose. Four diets contain 45% of starch from different foods (attiéké, attoukpou, placali and potato). Th

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Penjkin, Roman, Ljudmila Doroskina, and Aleksej Smirnov. "Development of forecasting elements for minimization of fungicide treatment in potato protection against early blight in Moscow region." Zbornik Matice srpske za prirodne nauke, no. 124 (2013): 227–40. http://dx.doi.org/10.2298/zmspn1324227p.

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Early blight of potato (the agent is imperfect fungus Alternaria alternata (Fr.) Keissl.) is a serious disease of potatoes under hot conditions. This disease is important in the regions of Eastern and Southern Europe, Asia and Africa. It is controlled with intensive application of fungicides commonly used against late blight. However, currently fungicides cause undesirable damage to humans and the environment. Elements of forecasting the early blight have been developed in order to minimize the dosage of fungicides. Primary symptoms (chloroses and necroses) and the potential of pathogen natura

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Alpern, Stanley B. "The European Introduction of Crops into West Africa in Precolonial Times." History in Africa 19 (1992): 13–43. http://dx.doi.org/10.2307/3171994.

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Historians of West Africa seem generally to agree that the main benefit conferred on the region by early European visitors, particularly the Portuguese, was the introduction of new crops. These crops are said to have improved diets and accelerated population growth, to the point, some would argue, that human losses through the slave trade were more than offset by the enhanced ability to feed people. Usually a few crops are cited, and the subject is not pursued very far, even in economic history texts, though the societies under study were overwhelmingly agricultural. Usually, too, American cro

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van der Waals, J. E., F. D. N. Denner, N. van Rij, and L. Korsten. "Evaluation of PLANT-Plus, a decision support system for control of early blight on potatoes in South Africa." Crop Protection 22, no. 6 (2003): 821–28. http://dx.doi.org/10.1016/s0261-2194(03)00049-8.

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McLeod, A., and S. Coertze. "First Report of Phytophthora infestans on Petunia × hybrida in South Africa." Plant Disease 90, no. 12 (2006): 1550. http://dx.doi.org/10.1094/pd-90-1550b.

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Phytophthora infestans is known worldwide as the destructive, late blight pathogen of potatoes and tomatoes. However, erratic reports dating back to 1856 also have shown it to be pathogenic on petunia (Petunia × hybrida), although it has not been regarded as an important pathogen on this host (4). Recently, reports from North America showed that P. infestans is of commercial importance in greenhouse-grown petunias (2), and that late blight-infected petunias may serve as inoculum to tomatoes growing in the same greenhouse (1,2). In the Western Cape Province of South Africa, two petunia samples

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Zhang, Xiaoyu, George A. Cavender, Kristina R. Lewandowski, Ginnefer O. Cox, and Chad M. Paton. "Sensory Analysis of a Processed Food Intended for Vitamin A Supplementation." Foods 9, no. 2 (2020): 232. http://dx.doi.org/10.3390/foods9020232.

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Provitamin A and pre-formed vitamin A compounds are essential micronutrients for humans. However, vitamin A deficiency (VAD) affects the health status of nearly 50% of populations in Southeast Asia and sub-Saharan Africa and is especially pronounced in preschool children and pregnant women. The objective of this research was to determine an acceptable flavor/ingredient combination to produce a palatable food product that incorporates sweet potatoes, peanut paste, and chickpeas. We sought to determine the acceptability of the three product formulations and to determine the influence of demograp

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Muzhinji, N., J. W. Woodhall, M. Truter, and J. E. van der Waals. "Elephant Hide and Growth Cracking on Potato Tubers Caused by Rhizoctonia solani AG3-PT in South Africa." Plant Disease 98, no. 4 (2014): 570. http://dx.doi.org/10.1094/pdis-08-13-0815-pdn.

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Rhizoctonia solani consists of 13 anastomosis groups (AGs) designated AG1 to 13. AG3-PT is considered the predominant AG in potatoes (4) and is associated with quantitative and qualitative yield losses. Qualitative losses are typically associated with the tuber blemish disease, black scurf. However, atypical tuber blemishes such as elephant hide consisting of corky lesions on the tuber surface (2) have also been attributed to Rhizoctonia. Such atypical blemishes are not considered specific to Rhizoctonia, making direct-cause effect estimates difficult (1). Koch's postulates for the elephant hi

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Chimphango, Annie F. A., and Johann F. Görgens. "Postharvest technology for advancing sustainable bioenergy production for food processing." British Food Journal 117, no. 12 (2015): 2850–62. http://dx.doi.org/10.1108/bfj-07-2014-0259.

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Purpose – Agricultural food residues (agro-residues) receive low economic returns and experience disposal problems. The food production and processing is often not configured to supply agro-residues for production of bioenergy needed in food processing. The feasibility of utilising agro-residues through advances in postharvest technology for sustainable bioenergy conversion is reviewed. The paper aims to discuss this issue. Design/methodology/approach – Agro-residues from maize, sugarcane and potatoes in five African countries were assessed from secondary data to identify suitable conversion t

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Siwela, Muthulisi, Kirthee Pillay, Laurencia Govender, et al. "Biofortified Crops for Combating Hidden Hunger in South Africa: Availability, Acceptability, Micronutrient Retention and Bioavailability." Foods 9, no. 6 (2020): 815. http://dx.doi.org/10.3390/foods9060815.

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In many poorer parts of the world, biofortification is a strategy that increases the concentration of target nutrients in staple food crops, mainly by genetic manipulation, to alleviate prevalent nutrient deficiencies. We reviewed the (i) prevalence of vitamin A, iron (Fe) and zinc (Zn) deficiencies; (ii) availability of vitamin A, iron and Zn biofortified crops, and their acceptability in South Africa. The incidence of vitamin A and iron deficiency among children below five years old is 43.6% and 11%, respectively, while the risk of Zn deficiency is 45.3% among children aged 1 to 9 years. Des

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Onkendi, Edward M., and Lucy N. Moleleki. "Detection of Meloidogyne enterolobii in potatoes in South Africa and phylogenetic analysis based on intergenic region and the mitochondrial DNA sequences." European Journal of Plant Pathology 136, no. 1 (2013): 1–5. http://dx.doi.org/10.1007/s10658-012-0142-y.

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Okonya, Joshua Sikhu, Heidy Gamarra, Anastase Nduwayezu, Astere Bararyenya, Jürgen Kroschel, and Jan Kreuze. "Serological survey and metagenomic discovery of potato viruses in Rwanda and Burundi reveals absence of PVY in Burundi and first report of TRV in potatoes in sub-Saharan Africa." Virus Research 302 (September 2021): 198487. http://dx.doi.org/10.1016/j.virusres.2021.198487.

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Chakona, Gamuchirai, and Charlie Shackleton. "Food Taboos and Cultural Beliefs Influence Food Choice and Dietary Preferences among Pregnant Women in the Eastern Cape, South Africa." Nutrients 11, no. 11 (2019): 2668. http://dx.doi.org/10.3390/nu11112668.

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A well-nourished and healthy population is a central tenet of sustainable development. In South Africa, cultural beliefs and food taboos followed by some pregnant women influence their food consumption, which impacts the health of mothers and children during pregnancy and immediately afterwards. We documented food taboos and beliefs amongst pregnant isiXhosa women from five communities in the Kat River Valley, South Africa. A mixed-methods approach was used, which was comprised of questionnaire interviews with 224 women and nine focus group discussions with 94 participants. Overall, 37% of the

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Subbotin, Sergei A., Javier Franco, Rinus Knoetze, Tatiana V. Roubtsova, Richard M. Bostock, and Ignacio Cid del Prado Vera. "DNA barcoding, phylogeny and phylogeography of the cyst nematode species from the genus Globodera (Tylenchida: Heteroderidae)." Nematology 22, no. 3 (2020): 269–97. http://dx.doi.org/10.1163/15685411-00003305.

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Summary Globodera presently contains 13 valid and three as yet undescribed species. Three species, G. rostochiensis, G. pallida and G. ellingtonae, the potato cyst nematodes (PCN), cause significant economic losses on potatoes around the world. In our study we provide comprehensive phylogenetic analyses of 455 ITS rRNA, 219 COI and 164 cytb gene sequences of 11 valid and two undescribed species of Globodera using Bayesian inference, maximum likelihood and statistical parsimony. New 205 COI, 116 cytb and 21 ITS rRNA gene sequences were obtained from 148 populations of these species collected fr

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Ngadze, Elizabeth, David Icishahayo, Teresa A. Coutinho, and Jacquie E. van der Waals. "Role of Polyphenol Oxidase, Peroxidase, Phenylalanine Ammonia Lyase, Chlorogenic Acid, and Total Soluble Phenols in Resistance of Potatoes to Soft Rot." Plant Disease 96, no. 2 (2012): 186–92. http://dx.doi.org/10.1094/pdis-02-11-0149.

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Pectobacterium atrosepticum, P. carotovorum subsp. brasiliensis, and Dickeya spp. cause soft rot of potato (Solanum tuberosum) worldwide. Plants respond to bacterial invasion by activating defense responses associated with accumulation of several enzymes and inhibitors, which prevent pathogen infection. This study focused on the role of polyphenol oxidase (PPO), peroxidase (POD), phenylalanine ammonia lyase (PAL), chlorogenic acid, and total soluble phenols in imparting resistance to soft rot pathogens. Seven and 11 varieties grown by farmers in South Africa and Zimbabwe, respectively, were us

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Emmaculate, Sanya, Okoth M. Wandayi, Abong G. Ooko, and Mugalavai V. Kadenyeka. "Nutrient and Anti-Nutrient Composition of Extruded Cereal Flours Fortified with Grain Amaranth, Baobab and Orange-fleshed Sweet Potato Powder." Journal of Food Research 9, no. 6 (2020): 21. http://dx.doi.org/10.5539/jfr.v9n6p21.

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A majority of households in Sub-Saharan Africa utilize cereal-based flours in the preparation of most of their staples. However, the micronutrient contents of these cereal-based flours are low with higher levels of anti-nutrients. Food to food fortification is being used as an alternative to improve the micronutrient content of the cereal-based flours. This study sought to develop an extruded composite flour using sorghum and maize as the cereal base and baobab, grain amaranth and orange-fleshed sweet potatoes as the fortificants. A completely randomized design in factorial arrangement with in

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Francis, Ardath, Stephen J. Darbyshire, Anne Légère, and Marie-Josée Simard. "The Biology of Canadian Weeds. 151. Erodium cicutarium (L.) L'Hér. ex Aiton." Canadian Journal of Plant Science 92, no. 7 (2012): 1359–80. http://dx.doi.org/10.4141/cjps2012-076.

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Francis, A., Darbyshire, S. J., Légère, A. and Simard, M.-J. 2012. The Biology of Canadian Weeds. 151. Erodium cicutarium (L.) L'Hér. ex Aiton. Can. J. Plant Sci. 92: 1359–1380. Stork's bill, Erodium cicutarium, is an annual weed of the geranium family (Geraniaceae), native to Mediterranean Europe, North Africa and western Asia. It has spread widely to temperate regions of both hemispheres, in particular to semi-arid ranges and prairies where it is frequently a dominant weed. In western Canada, it has increased in importance as a weed of cereal, canola, legume, sugarbeet and potato crops, part

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Matthiessen, J. N., and S. E. Learmonth. "Spatial sampling of insects, plant parts and insect attacks in the soil of potato crops." Bulletin of Entomological Research 83, no. 4 (1993): 607–12. http://dx.doi.org/10.1017/s0007485300040037.

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AbstractA method was devised for spatial sampling within the soil in potato crops where the soil insects African black beetle, Heteronychus arator (Fabricius) (Coleoptera: Scarabaeidae) and whitefringed weevil, Graphognathus leucoloma (Boheman) (Coleoptera: Curculionidae) are pests. The number and position of potato plant parts, the soil insects, and their attacks on potatoes were defined within the hilled-up soil profile of sections of the planting rows. Neither potato tubers, nor insects nor insect attacks were uniformly distributed. Tubers occurred mainly in the middle of the hill, while th

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Kimaru, S. L., D. C. Kilalo, J. W. Kimenju, and W. M. Muiru. "Detection of Potato virus Y associated with African nightshade leafy vegetable (Solanum scabrum miller) in Kenya." Agricultural Science and Technology 12, no. 3 (2020): 255–59. http://dx.doi.org/10.15547/ast.2020.03.040.

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Abstract. The African nightshades (ANS) have been part of the food systems in sub-Saharan Africa for generations. They are particularly attractive to small scale farmers because the risks of crop losses are much lower compared to the exotic vegetables. Plant viruses are economically important pathogens affecting African nightshade production. More than 200 plant viruses are reported to infest solanaceous family crops. This study was carried out to detect Potato virus Y associated with African nightshade. Symptomatic leaf samples were obtained from four agro-ecological zones in Kenya. The viral

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