Journal articles: 'Red spider mite'

1

Liburd, Oscar, Lorena Lopez, and Doug Phillips. "Mite Pests of Southern Highbush Blueberry in Florida." EDIS 2020, no. 5 (September 3, 2020): 4. http://dx.doi.org/10.32473/edis-in1284-2020.

Full text

Abstract:

Several mite species attack southern highbush blueberries (SHB), including the southern red mite (Oligonychus ilicis McGregor (Acari: Tetranychidae)), the false spider mite or flat mite (Brevipalpus yothersi Baker) and the blueberry bud mite (Acalitus vaccinii Keifer). The southern red mite is the key mite pest attacking blueberry plants in the southeastern US (Lopez and Liburd 2020). The false spider mite is a secondary leaf feeding mite pest that was reported attacking southern highbush blueberry in 2016 (Akyazi et al. 2017). This publication discusses southern red mites and flat mites on SHB in Florida, including life cycle, damage, and management practices.

APA, Harvard, Vancouver, ISO, and other styles

2

Banerjee, Piu, Arghya Laha, Indrani Samaddar, Himaniv Biswas, Debjani Sarkar, Sovan Roy, Goutam K. Saha, and Sanjoy Podder. "Acaricidal activity of nishinda (Vitex negundo) leaf and garlic (Allium sativum) bulb extract against red spider mite, Oligonychus coﬀeae (Acari: Tetranychidae) in tea plantations of Darjeeling hill, West Bengal, India." Acta Biologica Szegediensis 65, no. 1 (August 21, 2021): 59–64. http://dx.doi.org/10.14232/abs.2021.1.59-64.

Full text

Abstract:

The red spider mite, Oligonychus coffeae (Nietner) serves as a serious threat to the Darjeeling tea plantations affecting the quality of the leaves. Various plant extracts are currently being researched as an alternative to the chemical pesticides to control the red spider mites. In the present study, the leaves of Vitex negundo L. and the bulb of Allium sativum L. were analyzed for their acaricidal activity on the larval, nymphal and adult stages of the mite. Both the extracts were found to have potent activity against red spider mites and may prove to be potential acaricides in future.

APA, Harvard, Vancouver, ISO, and other styles

3

Konopacki, Paweł J., and Wojciech Warabieda. "Assessment of Dimensions in Order to Aid Classification of European Red Mite and Two-Spotted Spider Mite by Means of Digital Imaging of Infected Leaves." Agricultural Engineering 22, no. 4 (December 1, 2018): 15–24. http://dx.doi.org/10.1515/agriceng-2018-0032.

Full text

Abstract:

AbstractThe methods currently used to assess orchard infestation are time-consuming and do not take into account non-adult forms of mites, due to their small size. Advance in digital imaging technology, however, has resulted in the discovery of a more viable method to enable a fast and reliable assessment of orchard infestation. Digital images of infected apple leaves were made and examined for the presence of European red mites and two-spotted spider mites. As well as adult mites, non-adult European red mite forms were also encountered. After extracting all objects considered as mites from the image, imaging software was then used to assess their dimension and shape parameters. Length, width, area, and equivalent diameter were different for all three observed mite groups: adult female European red mites, possible non-adult European red mites and adult two-spotted spider mites. Differences in circularity and elongation were found in adult two-spotted spider mites and various forms of European red mites, while the perimeter was similar in adult European red mites and two-spotted spider mites, and different in the non-adult forms of European red mites. However, as the ranges of 95% prediction intervals for these features overlap, a combination of at least two features as well as employing statistical procedures may greatly increase the probability of appropriate classification of the observed objects as different mites.

APA, Harvard, Vancouver, ISO, and other styles

4

Heinz-Castro, Rapucel Tonantzin Quetzalli, Roberto Arredondo-Valdés, Salvador Ordaz-Silva, Heriberto Méndez-Cortés, Agustín Hernández-Juárez, and Julio Cesar Chacón-Hernández. "Bioacaricidal Potential of Moringa oleifera Ethanol Extract for Tetranychus merganser Boudreaux (Acari: Tetranychidae) Control." Plants 10, no. 6 (May 21, 2021): 1034. http://dx.doi.org/10.3390/plants10061034.

Full text

Abstract:

The Tetranychidae family includes mites causing severe damage to agricultural fields. The red spider mite, Tetranychus merganser Boudreaux (Acari: Tetranychidae), causes severe damage to several plant species grown as cash crops. Current red spider mite control depends mainly on chemical insecticides. There is a need for alternate control measures that are environmentally friendlier than chemical pesticides. The aim of the study was to assess the effects of Moringa oleifera leaf ethanolic extract at different concentrations (0.1, 0.5, 1, 5, 10, 15, and 20% (v/v)) against T. merganser females. Such effects can serve as a basis to include this compound in integrated pest management programs for the control of red spider mites. Mites treated with 20% (v/v) killed 86.67%, 13.70%, and 96.30% at 24, 48, and 72 h, respectively, as compared to the control treatment. Oviposition, egg hatching, and the damage caused by red spider mites were all reduced at high concentrations. Moringa oleifera leaf ethanolic extract can be used as a powerful bioacaricide for the control of T. merganser.

APA, Harvard, Vancouver, ISO, and other styles

5

CHO, S. "673 Allergenicity of spider mites such as citrus red mite, European red mite, and two-spotted spider mite,and its cross-reactivity wit domestic mites." Journal of Allergy and Clinical Immunology 105, no. 1 (January 2000): S226—S227. http://dx.doi.org/10.1016/s0091-6749(00)91101-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Roy, Kusal, Arun Rathod, and M. Soniya Devi. "Bio-efficacy of bifenthrin 8 SC against shoot and fruit borer and red spidermite of okra, Abelmoschus esculentus (L.) Moench." Journal of Applied and Natural Science 9, no. 1 (March 1, 2017): 344–50. http://dx.doi.org/10.31018/jans.v9i1.1194.

Full text

Abstract:

A field study was conducted to evaluate the relative bio-efficacy of bifenthrin 8 SC @60g, 80g, 100g,120g, 140g a.i./ha against shoot and fruit borer and red spider mite of okra, Abelmoschus esculentus (L.) Moench cv. OH -152 at the Central Research Farm of BCKV, Nadia, West Bengal, for two consecutive seasons. Cypermethrin10 EC @70g a.i./ha and dicofol 18.5 EC @500g a.i./ha were used as standard treated check in the experiment. Population of beneficial insects like spider, predatory mites and Braconid parasitoid were also recorded during the time of observation on pests’ infestation. Among treatments, bifenthrin 8 SC @ 100 to 140g a.i./ha was found significantly(p≤0.05) superior over treated check cypermethrin 10 EC @ 70g a.i./ha and dicofol 18.5 EC @ 500g a.i./ha tobring down Earias vittella and red spider mite (Tetranychus urticae) population, respectively, on okra. Bifenthrin 8SC @ 140g a.i./ha recorded maximum fruit yield (82.3 q/ha during kharif 2012 and 53.1q/ha during rabi 2012-13) ofokra. Also, foliar application of bifenthrin 8 SC did not reveal any significant (p≤0.05) adverse effect on population of spider, predatory mite and Braconid parasitoid in okra crop ecosystem. These findings will facilitate the selection of bifenthrin 8 SC as an effective acaro-insecticides for effective control of shoot and fruit borer and red spider mite of okra.

APA, Harvard, Vancouver, ISO, and other styles

7

Gautam Kumar Saikia, Kapil Kumar Bhuyan, and Mukul Kumar Deka Subhash Chandra Barua. "Effect of certain indigenous technical knowledge on the management of red spider mite (Oligonychus coffeae) in tea." Journal of Plantation Crops 45, no. 2 (September 21, 2017): 135. http://dx.doi.org/10.19071/jpc.2017.v45.i2.3308.

Full text

Abstract:

An investigation was carried out at Deha Tea Estate, Jorhat, Assam during 2015-16 by using different indigenous technical knowledge (ITK) prevalent among different small tea growers. Fish extract at (0.25, 0.5 and 1%), Polygonum hydropiper at (2.5, 5 and 7.5%) and Azadirachtin (Neemazal-F 5%) were evaluated in field conditions against tea mite. The result showed that fish extract in combination with cow dung, cow urine and water when sprayed at one per cent concentration, significantly reduced red spider mite population (96.5%), percentage of leaves infestation (5.2%) and leaf area infested by the mite (11.6%). P. hydropiper in combination with cow urine and water when sprayed at 7.5 per cent concentration significantly reduced red spider mite population (87.5%), percentage of infestation (9.1%) and leaf area infested by the mite (12.9%). Among all the ITKs, fish extract at one per cent caused higher reduction of infestation of red spider mite followed by P. hydropiper extract at 7.5 per cent. Influence of both the treatments on the management of red spider mite was at par with that of commercial Azadirachtin.

APA, Harvard, Vancouver, ISO, and other styles

8

Shamiyeh, N. B., C. H. Roberts, C. A. Mullins, and R. A. Straw. "Apple, European Red Mite and Twospotted Spider Mite Control, 1995." Arthropod Management Tests 21, no. 1 (January 1, 1996): 46. http://dx.doi.org/10.1093/amt/21.1.46.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Tanigoshi, L. K., J. D. Chamberlain, and T. A. Murray. "Yellow Spider Mite Control on Red Raspberry, 1996." Arthropod Management Tests 22, no. 1 (January 1, 1997): 57. http://dx.doi.org/10.1093/amt/22.1.57a.

Full text

Abstract:

Abstract Six acaricide treatments were evaluated for control of a summer population of YSM in Mt. Vernon, WA on a 6-yr-old ‘Meeker’ planting. Treatments were replicated 4 times on 9 X 30 ft plots arranged in a RCB design. Sprays were applied on 15 Aug with a tractor-mounted (PTO) plot sprayer equipped with 6, 5 gal capacity stainless steel tanks individually valved to an over-the-row boom. The boom was equipped with 13 D4-45 TeeJet nozzles operating at 200 psi to deliver 150 gpa at 2.5 mph. Female counts were periodically made by randomly collecting 20 terminal leaflets from both sides of the row and brushing them onto glass plates with a mite-brushing machine and counting mites.

APA, Harvard, Vancouver, ISO, and other styles

10

Tanigoshi, L. K., and J. D. Chamberlain. "Mcdaniel Spider Mite Control on Red Raspberry, 1997." Arthropod Management Tests 23, no. 1 (January 1, 1998): 55. http://dx.doi.org/10.1093/amt/23.1.55.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Shamiyeh, N. B., B. Gerhardt, C. A. Mullins, and R. A. Straw. "European Red Mite and Twospotted Spider Mite Control on Apple, 1997." Arthropod Management Tests 23, no. 1 (January 1, 1998): 33. http://dx.doi.org/10.1093/amt/23.1.33.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Ravi, Jayasree, Donn T. Johnson, Barbara A. Lewis, and Curt R. Rom. "Differential Interaction of Apple Cultivars and Spider Mites (Acari: Tetranychidae)." HortScience 33, no. 4 (July 1998): 602c—602. http://dx.doi.org/10.21273/hortsci.33.4.602c.

Full text

Abstract:

In 1995, greenhouse and orchard experiments of 11 apple cultivars were conducted in Fayetteville and Clarksville, Ark. Weekly cumulative mite days (CMD) were regressed against leaf bronzing (colorimeter value L) and compared among cultivars. European red mites, Panonychus ulmi and two-spotted spider mites, Tetranychus urticae, were found on leaves. `Liberty', `Royal Gala', and `Stark Spur Red Rome Beauty' had significantly more mites (>1940 CMD) than did `Arkansas Black' (1303), `Jonafree' (1150), and `Northern Spy' (973). A low CMD on `Northern Spy' caused leaves to bronze faster [y = 29.04 + 0.006(x); R2 = 52, P = 0.0002] than did a high CMD on `Liberty' [y = 30.41 + 0.0027(x); R2= 70, P = 0.0001]. Field estimates were made of spider mites/leaf and bronzing from 20 June to 7 Aug. `Stark Spur Red Rome Beauty' and `Stark Spur Law Rome' had significantly more CMD than did `Northern Spy' and `Arkansas Black'. Apple cultivars differed in carrying capacity to mites (susceptibility) and how fast leaves bronze in response to mite feeding. Cultivar differences in hairiness of the lower leaf surface were not correlated to CMD.

APA, Harvard, Vancouver, ISO, and other styles

13

Finn, Chad, and Kirsten Wennstrom. "Twospotted Spider Mite Presence on 40 Rubus Species." HortScience 30, no. 4 (July 1995): 834D—834. http://dx.doi.org/10.21273/hortsci.30.4.834d.

Full text

Abstract:

Twospotted spider mites (Tetranychus urticae Koch) can be a serious pest on Rubus, primarily red raspberry, in the Pacific Northwest. As we expand the Rubus germplasm in our breeding program, we must evaluate new material for its susceptibility or resistance to pests. Populations of 40 Rubus sp., representing the Malachobatus, Idaeobatus, Eubatus, and Anoplobatus, as well as `Meeker' and `Marion', were evaluated for mite presence in either a replicated or observation trial. Fully mature leaves, 10 in the replicated trial and 15 in the nonreplicated trial, were harvested at random from 15 to 60 cm above the soil surface. Mature, motile mites were counted on the lower surface of the leaves using a dissecting microscope. Because leaf size was extremely variable from species to species, leaf area was measured and a mite density calculated. There were significant differences in mite density among the species in the replicated trial. The average mite density was 0.03 mites/cm2, and mite densities were high on one population of R. Iambertianus and R. hunanensis, 2.7 and 1.6 mites/cm2, respectively. In the nonreplicated trial, R. glabratus had the highest mite density (2.3 mites/cm2). A population of R. corchorifolius (1.0 mites/cm2) and R. parviflorus (0.9 mites/cm2) had fairly high mite densities. In both plantings, many of the populations had few or no mites.

APA, Harvard, Vancouver, ISO, and other styles

14

Bryon, Astrid, Andre H. Kurlovs, Wannes Dermauw, Robert Greenhalgh, Maria Riga, Miodrag Grbić, Luc Tirry, et al. "Disruption of a horizontally transferred phytoene desaturase abolishes carotenoid accumulation and diapause in Tetranychus urticae." Proceedings of the National Academy of Sciences 114, no. 29 (July 3, 2017): E5871—E5880. http://dx.doi.org/10.1073/pnas.1706865114.

Full text

Abstract:

Carotenoids underlie many of the vibrant yellow, orange, and red colors in animals, and are involved in processes ranging from vision to protection from stresses. Most animals acquire carotenoids from their diets because de novo synthesis of carotenoids is primarily limited to plants and some bacteria and fungi. Recently, sequencing projects in aphids and adelgids, spider mites, and gall midges identified genes with homology to fungal sequences encoding de novo carotenoid biosynthetic proteins like phytoene desaturase. The finding of horizontal gene transfers of carotenoid biosynthetic genes to three arthropod lineages was unprecedented; however, the relevance of the transfers for the arthropods that acquired them has remained largely speculative, which is especially true for spider mites that feed on plant cell contents, a known source of carotenoids. Pigmentation in spider mites results solely from carotenoids. Using a combination of genetic approaches, we show that mutations in a single horizontally transferred phytoene desaturase result in complete albinism in the two-spotted spider mite, Tetranychus urticae, as well as in the citrus red mite, Panonychus citri. Further, we show that phytoene desaturase activity is essential for photoperiodic induction of diapause in an overwintering strain of T. urticae, consistent with a role for this enzyme in provisioning provitamin A carotenoids required for light perception. Carotenoid biosynthetic genes of fungal origin have therefore enabled some mites to forgo dietary carotenoids, with endogenous synthesis underlying their intense pigmentation and ability to enter diapause, a key to the global distribution of major spider mite pests of agriculture.

APA, Harvard, Vancouver, ISO, and other styles

15

Addesso, Karla M., Anthony L. Witcher, and Donna C. Fare. "Swirski Mite Controlled-release Sachets as a Pest Management Tool in Container Tree Production." HortTechnology 28, no. 3 (June 2018): 391–98. http://dx.doi.org/10.21273/horttech03934-17.

Full text

Abstract:

Adoption of biological control tools in woody ornamental nursery production has lagged behind other agriculture fields. One of the major obstacles to adoption is lack of information on the efficacy of various biological control agents in nursery production systems. The predatory mite Amblyseius swirskii, sold commercially as “swirski mite,” is a generalist predatory mite that has recently been adopted as a generalist control for a wide range of mite and insect pests, including thrips (Thripidae), whiteflies (Aleyrodidae), eriophyid mites (Eriophyidae), broad mite (Polyphagotarsonemus latus), and spider mites (Tetranychidae). A controlled-release sachet formulation of swirski mite was evaluated in three experiments to determine whether size of the tree, timing of first application, or sun intensity would affect treatment efficacy. Pest numbers on plants was evaluated biweekly for 12 weeks. The swirski mite sachets controlled broad mite and spider mite outbreaks on red maple trees (Acer rubrum) grown in nos. 3 and 15 nursery containers, respectively. Application at the time of red maple rooted cutting transplant was not necessary to achieve summer-long control of pests. No outbreaks of target pests on flowering dogwood (Cornus florida) in no. 5 containers grown under both full sun and shade, but with low levels of broad mite persisting in the shade treatment and thrips persisting in sun. These results suggest that swirski mite is a promising candidate for biological control in woody ornamental nursery production.

APA, Harvard, Vancouver, ISO, and other styles

16

Yimame, Kidist Teferra, and Fikre Dubale Betree. "Verification of Efficacy of Bitoxybacillin/ Bacillus thuringiensis on Red Spider Mite, Tetranychusurticae on Cut Roses." Research on World Agricultural Economy 1, no. 1 (December 1, 2020): 32. http://dx.doi.org/10.36956/rwae.v1i1.240.

Full text

Abstract:

Cut roses industries, new income resource in Ethiopia, most of flower industries are established near and around to Addis Ababa city, especially in west and east Shewa zones, most of flower enterprise established by foreigner, which is enhance global economy and creates jobs opportunity. Red spider mite, Tetranychusurticae is the major obstacles for flower production here in Ethiopia, in order to increase the quality and quantity of flower production need to plan different control strategies. Objective of this study was to evaluate the efficacy of these naturally occurring bacteria in controlling the red spider mite in rose flower farms. This experiment was donning on Menagesh, Gallica flower farm and the variety was Limbo flower, the application time was at flowering stage. Two rounds at the rate of 7ml/l by using Motorized knapsack sprayer for four consecutive months. The analysis of variance on mite count data after the application of Bitoxybacillin (Bt) and Abamectin 1.8%EC showed no significant difference (p>0.05) even after 21 days after the second spray (Table 1). However, the population density of the spider mite in Bt treated plots was very low in all sampling dates compared to the untreated check and Abamectin. The pest population (original data) after three weeks of the Bitoxybacillin applications was 68.1 per stem compared to Abamectin 1.8%EC (125.1) and control (110.57) indicating the registered miticide failed to suppress the mite population in roses. Bitoxybacill, would be advisable to have it registered in Ethiopia as alternative synthetic miticides for the control of red spider mite in Integrated Pest Management program.

APA, Harvard, Vancouver, ISO, and other styles

17

Jin, Peng-Yu, Lu Tian, Lei Chen, and Xiao-Yue Hong. "Spider mites of agricultural importance in China, with focus on species composition during the last decade (2008–2017)." Systematic and Applied Acarology 23, no. 11 (November 5, 2018): 2087. http://dx.doi.org/10.11158/saa.23.11.1.

Full text

Abstract:

Understanding pest species composition and their geographic distribution of important spider mites is fundamental and indispensable to establish an integrated pest management program. From a long-term survey during 2008–2017 in mainland China, we found that Tetranychus truncatus was the most frequently sampled Tetranychus spider mite (48.5%), followed by T. pueraricola (21.2%), T. kanzawai (12.5%), T. urticae (red) (5.7%) and T. urticae (green) (4.5%). Among them, T. truncatus was the major mite pest in the north of China. T. kanzawai was the dominant species in the Middle and Lower Reaches of the Yangtze River Region and T. pueraricola was the most important species in the southwest region. Other common and serious pests include Amphitetranychus viennensis (6.8%) and Panonychus citri (3.8%). This pattern was largely different from that in 2002–2004, when T. urticae (green and red) was believed to be the most serious mite pest. The factors involved in the change of species composition are not clear and need more exploration. We suggested that the increasing corn planting range may be partly responsible for the conversion of dominant species from other spider mites to T. truncatus. Further research on the mechanisms underlying the change of dominant species will help develop integrated management strategies.

APA, Harvard, Vancouver, ISO, and other styles

18

Sonalkar, V. U., S. M. Dadmal, and S. M. Ghawade. "Red spider mite Tetranychus cinabarinus (Boisd.) on watermelon cultivars." Indian Journal of Entomology 80, no. 2 (2018): 481. http://dx.doi.org/10.5958/0974-8172.2018.00052.4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Arbona, Vicent, Miguel G. Ximénez-Embún, Alberto Echavarri-Muñoz, Marcos Martin-Sánchez, Aurelio Gómez-Cadenas, Félix Ortego, and Miguel González-Guzmán. "Early Molecular Responses of Tomato to Combined Moderate Water Stress and Tomato Red Spider Mite Tetranychus evansi Attack." Plants 9, no. 9 (August 31, 2020): 1131. http://dx.doi.org/10.3390/plants9091131.

Full text

Abstract:

Interaction between plants and their environment is changing as a consequence of the climate change and global warming, increasing the performance and dispersal of some pest species which become invasive species. Tetranychus evansi also known as the tomato red spider mite, is an invasive species which has been reported to increase its performance when feeding in the tomato cultivar Moneymaker (MM) under water deficit conditions. In order to clarify the underlying molecular events involved, we examined early plant molecular changes occurring on MM during T. evansi infestation alone or in combination with moderate drought stress. Hormonal profiling of MM plants showed an increase in abscisic acid (ABA) levels in drought-stressed plants while salicylic acid (SA) levels were higher in drought-stressed plants infested with T. evansi, indicating that SA is involved in the regulation of plant responses to this stress combination. Changes in the expression of ABA-dependent DREB2, NCED1, and RAB18 genes confirmed the presence of drought-dependent molecular responses in tomato plants and indicated that these responses could be modulated by the tomato red spider mite. Tomato metabolic profiling identified 42 differentially altered compounds produced by T. evansi attack, moderate drought stress, and/or their combination, reinforcing the idea of putative manipulation of tomato plant responses by tomato red spider mite. Altogether, these results indicate that the tomato red spider mite acts modulating plant responses to moderate drought stress by interfering with the ABA and SA hormonal responses, providing new insights into the early events occurring on plant biotic and abiotic stress interaction.

APA, Harvard, Vancouver, ISO, and other styles

20

Khan, Mehroz, Abdul Ghani Lanjar, Babar Hussain Chang, Aslam Bukero, Ammara Rajput, Fida Hussain Magsi, Raheela Shah, Abdul Waheed Solangi, and Asif Hussain Chang. "Insect Pests Associated With Ornamental Plants." Biological Sciences - PJSIR 62, no. 3 (December 2, 2019): 188–94. http://dx.doi.org/10.52763/pjsir.biol.sci.62.3.2019.188.194.

Full text

Abstract:

The experiment was conducted during winter season 2014-15 at Sindh Agriculture University Nursery, Tandojam, Pakistan. Five ornamental plants viz; ixora, chrysanthemum, vine, sunflower and jasmine were kept under observation. Collection was done once a week through in situ and sweep net methods. Data was collected by examining 10 randomly selected plants of each ornamental plant species. The collected specimens were brought in the laboratory and identified at species level. The results indicated that there were 24 insect species found active on the ornamental plant species during study period. However, aphid, shield bug, flower feeder, white ant, whitefly, red spider mite and mealy bug were found the most active on Ixora. Aphids, leaf miner, flower feeder, green grass hopper, midges, earwigs and whitefly were found associated with Chrysanthemum. Similarly, aphid, blister mite, mealy bug, midges, red mite and whitefly were found active on vine ornamental creeper. The insects found active on sunflower were aphids, butterfly, green grass hopper, hairy caterpillar, head borer, leaf hopper, midges, ground beetle, red spider mite and white ants. Jasmine plant harboured red spider mite, whitefly, jasmine bug, leaf hopper, white ant and green grass hopper. Among beneficial insects such as predators, pollinators and parasitoids, the green lacewing, honey bee, hoverfly, Trichogramma, praying mantis, zigzag beetle and Tachinid fly were the active insects on all ornamental plants kept under observation. Aphids were found frequently occurring on most of the ornamental plants.

APA, Harvard, Vancouver, ISO, and other styles

21

Li, S. Y., and R. Harmsen. "EFFECTS OF LOW APPLICATION RATES OF THE PYRETHROID PP321 ON THE APPLE ORCHARD MITE COMPLEX (ACARI) IN ONTARIO." Canadian Entomologist 124, no. 2 (April 1992): 381–90. http://dx.doi.org/10.4039/ent124381-2.

Full text

Abstract:

AbstractThe impacts of the pyrethroid PP321 on the mite fauna in an apple orchard were studied at the Smithfield Experimental Farm of Agriculture Canada, Ontario, from 1988 to 1989. Two predacious mites, the phytoseiid Amblyseius fallacis (Garman) and the stigmaeid Zetzellia mali (Ewing), were affected by pyrethroid applications. The highest numbers of predators were found in untreated trees, and the lowest numbers were found in the trees treated with the higher rate of the pyrethroid (P < 0.05). Zetzellia mali has roughly the same susceptibility to PP321 as does A. fallacis. Two species of tetranychid phytophagous mites, the European red mite, Panonychus ulmi (Koch), and the twospotted spider mite, Tetranychus urticae Koch, were positively associated with pyrethroid applications. Significantly higher numbers of these mites were found in the pyrethroid-treated trees than in untreated ones (P < 0.05). Another phytophagous mite, the apple rust mite, Aculus schlechtendali (Nalepa) (Eriophyidae), was strongly suppressed by PP321 applications. Lower rate applications of the pyrethroid allowed more predators to survive, and resulted in lower abundances of tetranychid mites than did the higher rate. Therefore, reduced rates of pyrethroids may prove to be compatible with integrated control of spider mites in apple orchards.

APA, Harvard, Vancouver, ISO, and other styles

22

Cameron, J. Scott, Carol A. Hartley, Carl H. Shanks, and Jeannie K. L. Garth. "EFFECT OF TWO-SPOTTED SPIDER MITE FEEDING ON GAS EXCHANGE AND CHLOROPHYLL CHARACTERISTICS OF RED RASPBERRY LEAVES." HortScience 25, no. 9 (September 1990): 1166d—1166. http://dx.doi.org/10.21273/hortsci.25.9.1166d.

Full text

Abstract:

At two-week intervals from 17 June to 15 July, three groups of `Meeker' red raspberry plants were infested with two-spotted spider mites (Tetranychus urticae) in a greenhouse. While populations on individual plants were allowed to develop freely, control plants were kept free of mites with a chemical miticide. Gas exchange measurements were made on 27 July prior to visible mite damage, and on 7 October after injury was apparent. The relationships between mite populations and leaf gas exchange and chlorophyll characteristics were described using a logarithmic function.Physiological responses to mite feeding were observed prior to visible leaf injury. On both dates, CO2 assimilation rates decreased (p ≤ 0.001) with increasing mite numbers per leaflet. On 27 June, a significant relationship (R2 = 0.61***) was found between mite number and mesophyll conductance (gm). On 7 October, significant relationships (p ≤ 0.001) were also observed with gm, stomatal conductance (gs), and transpiration (E). Total chlorophyll content of leaves decreased with increasing mite populations, but chlorophyll a/b ratio and dry weight per leaf unit area were unchanged.

APA, Harvard, Vancouver, ISO, and other styles

23

Mobley, Kendrick N., and Richard P. Marini. "Gas Exchange Characteristics of Apple and Peach Leaves Infested by European Red Mite and Twospotted Spider Mite." Journal of the American Society for Horticultural Science 115, no. 5 (September 1990): 757–61. http://dx.doi.org/10.21273/jashs.115.5.757.

Full text

Abstract:

Greenhouse-grown `Imperial Delicious' apple (Malus domestics Borkh.) and `Redhaven' peach (Prunus persica Batsch.) trees were inoculated during the summer with three densities of European red mite (ERM) (Panonychus ulmi Koch) and twospotted spider mite (TSM) (Tetranychus urticae Koch). As ERM- and TSM-days increased, net photosynthesis (Pn), transpiration (Tr), and total chlorophyll content (TCHL) of apple leaves decreased linearly. At similar densities, TSM was more damaging than ERM to apple leaf gas exchange. Water-use efficiency (WUE) of apple declined similarly with increasing mite-days for both mite species. Specific leaf weight (SLW) of apple increased with TSM-days. Pn, Tr, TCHL, and WUE of peach declined linearly with increasing ERM- and TSM-days, and the rates of decline were similar for both mite species. Mites did not affect peach SLW. These results indicate that greenhouse-grown peach is more tolerant than apple to mite feeding.

APA, Harvard, Vancouver, ISO, and other styles

24

Sewify, Gamal, Wafai Mikhail, Marguerite Rizk, and Dalia Hassan. "Using a Biological Control Method For Controlling Red Spider Mite." Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control 7, no. 1 (December 1, 2015): 115–26. http://dx.doi.org/10.21608/eajbsf.2015.17246.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Labuschagne, L., and H. Wainwright. "BIOLOGICAL CONTROL OF RED SPIDER MITE IN COMMERCIAL BLACKCURRANT PLANTATIONS." Acta Horticulturae, no. 352 (October 1993): 563–68. http://dx.doi.org/10.17660/actahortic.1993.352.82.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Roy, Anita, Dipankar Chakraborti, and Sampa Das. "Effectiveness of garlic lectin on red spider mite of tea." Journal of Plant Interactions 3, no. 3 (September 2008): 157–62. http://dx.doi.org/10.1080/17429140701754195.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

XIE, LIN, HUI MIAO, and XIAO-YUE HONG. "The two-spotted spider mite Tetranychus urticae Koch and the carmine spider mite Tetranychus cinnabarinus (Boisduval) in China mixed in their Wolbachia phylogenetic tree." Zootaxa 1165, no. 1 (April 3, 2006): 33. http://dx.doi.org/10.11646/zootaxa.1165.1.2.

Full text

Abstract:

Two closely-related species Tetranychus urticae Koch and T. cinnabarinus (Boisduval) are important pests in China causing great damage to agricultural crops. Morphological differentiation between these two spider mite species has been very difficult due to intraspecific variation among populations. Molecular data suggest they are two forms of one species. We approach this problem from a different angle, and attempt to differentiate between the two mites using Wolbachia symbionts, which may show co-evolutionary trends with their hosts. All of the 13 populations of T. urticae from China were found to be infected with Wolbachia, with the infection rate ranging from 2.5% to 85%. Among the 25 populations of T. cinnabarinus examined, seven populations (Shenyang, Yinchuan, Binzhou, Wei’xian, Minhang, Chibi and Gaoxiong) were not infected with Wolbachia, and the other 18 populations were infected, at an infection rate from 5% to 77.5%. No correlation was found between species of host plant and Wolbachia infection rate in either mite. Wolbachia wsp gene sequence analysis showed that there are two clades of Wolbachia from the spider mites. In the Con clade, three Wolbachia strains from T. cinnabarinus (red) in China were mixed with those from two T. urticae (green) populations from France. In Ori clade, two sub-clades were visible. In one sub-clade, fifteen Wolbachia strains from T. cinnabarinus (red) were mixed with eight T. urticae (green; six from China and two from USA and France). In another sub-clade, seven Wolbachia strains from Chinese T. urticae populations (green) were mixed with those from one French red form and five green forms from France, Australia and Japan. Therefore, T. urticae and T. cinnabarinus from China are mixed in the phylogenetic tree of their endosymbiont Wolbachia.

APA, Harvard, Vancouver, ISO, and other styles

28

Pandian, Prabhakaran, Radhakrishnan Balakrishnan, Srikumar Kodakkadal Kotian, and Kumar Bastian Suresh. "Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea." Plant Protection Science 53, No. 4 (August 30, 2017): 232–42. http://dx.doi.org/10.17221/23/2015-pps.

Full text

Abstract:

In search for botanicals as an alternative remedy to synthetic chemicals in the pest control of tea plantations, ferns such as Adiantum raddianum, Asplenium aethiopicum, Cyclosorus interruptus, Dicranopteris linearis, Diplazium polypodioides, and Pteridium aquilinum were evaluated against the two major pests of tea, red spider mite Oligonychus coffeae Nietner and tea mosquito bug Helopeltis theivora Waterhouse, which are the foremost seasonal pests in tea fields, causing severe crop loss. Apart from synthetic chemicals, only the neem kernel extract is recommended in tea fields. The aqueous extracts of ferns were screened at different concentrations against these pests under laboratory and field conditions. The extracts of P. aquilinum and D. linearis showed good contact toxicity at a 5% concentration to O. coffeae. The acaricidal activity was observed in the order P. aquilinum > D. linearis > C. interruptus > A. raddianum > D. polypodioides > A. aethiopicum. Under field conditions, the extract of D. linearis and P. aquilinum showed a 50% reduction in the population of red spider mite and caused no phytotoxic effect to tea leaves. But their insecticidal activity was less pronounced against H. theivora. They exhibit antifeedant activity, which was sustained only for 24 hours. The photochemical screening of extracts showed a qualitatively increased level of saponins in P. aquilinum, D. linearis, and C. interruptus. The study shows that the aqueous extracts of D. linearis and P. aquilinum can be incorporated in the mite control programme in tea.

APA, Harvard, Vancouver, ISO, and other styles

29

Sato, Yukie, Heike Staudacher, and Maurice W. Sabelis. "Why do males choose heterospecific females in the red spider mite?" Experimental and Applied Acarology 68, no. 1 (November 3, 2015): 21–31. http://dx.doi.org/10.1007/s10493-015-9985-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Beers, E. H. "Effect of Experimental and Registered Miticides on Twospotted Spider Mite and European Red Mite, 1996." Arthropod Management Tests 22, no. 1 (January 1, 1997): 1. http://dx.doi.org/10.1093/amt/22.1.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Tanigoshi, L. K., and J. M. Babcock. "Cyhexatin Resistance and Enhancement with Calcium Chloride in Washington State Populations of Spider Mites (Acari: Tetranychidae) on Pome Fruit." Journal of Entomological Science 25, no. 2 (April 1, 1990): 325–35. http://dx.doi.org/10.18474/0749-8004-25.2.325.

Full text

Abstract:

The enhancement of calcium salts, primarily calcium chloride, to the efficacy of cyhexatin in Washington populations of twospotted spider mite (TSSM), Tetranychus urticae Koch, McDaniel spider mite (MSM), Tetranychus mcdanieli McGregor and European red mite (ERM), Panonychus ulmi (Koch) was evaluated in the laboratory and in commercial apple orchards. Laboratory techniques used to test the 50WP, 5F and technical 85% cyhexatin were the slide-dip, leaf disk and leaf spray bioassays. Bioassay responses by various spider mite populations to cyhexatin and calcium salts indicated that the leaf spray method was most appropriate on apple foliage and that calcium chloride increased cyhexatin 50WP toxicity 6-fold for ERM and 31-fold for TSSM. The toxicity of formetanate 92SP, propargite 30WP, dicofol 1.6EC and fenbutatinoxide 4L was not increased by combining with CaCl2. Under field conditions, efficacy trials with ERM and MSM to cyhexatin and cyhexatin + CaCl2 indicated that differences between treatment means were significant, but less effective than were predicted from laboratory bioassays. Inconsistent field control was apparently associated with respective adjuvant/cyhexatin concentrations, tetranychid population susceptibility and physical variables inherently associated with orchard management practices.

APA, Harvard, Vancouver, ISO, and other styles

32

Campbell, Richard J., Kendrick N. Mobley, and Richard P. Marini. "Growing Conditions Influence Mite Damage on Apple and Peach Leaves." HortScience 25, no. 4 (April 1990): 445–48. http://dx.doi.org/10.21273/hortsci.25.4.445.

Full text

Abstract:

The effect of growing conditions on the physiological damage caused by mite feeding was evaluated. Control and twospotted spider mite (Tetranychus urticae Koch)-infested `Imperial Delicious' apple (Malus domestica Borkh.) and `Redhaven' peach [Prunus persica L. (Batsch.)] trees were grown under winter and summer greenhouse conditions. Mite feeding reduced net photosynthesis (Pn) of apple in both winter and summer, with equivalent regression models (Pn on mite days). Total chlorophyll content (TCHL) was decreased, and specific leaf weight (SLW) was increased by mite feeding in both winter and summer. In peach, Pn was also reduced by mite feeding, with equivalent regression models in winter and summer. SLW was unaffected, and TCHL was reduced by mite feeding in both seasons. Transpiration (Tr) of apple and peach was inconsistently affected by mites in winter and summer. In another experiment, control and European red mite (ERM) [Panonychus ulmi (Koch)]-infested `Red-chief Delicious' apple trees were grown in the summer under both greenhouse and field conditions. ERM feeding negatively affected Pn in both the greenhouse and the field, but reductions were less under field conditions. Mites reduced Tr 28% in the greenhouse and 12% in the field. TCHL, SLW, and leaf N content (LFN) were reduced by 16%, 24%, and 26%, respectively, in the greenhouse. In the field, TCHL was not significantly reduced, and SLW and LFN were reduced by 6% and 13%, respectively.

APA, Harvard, Vancouver, ISO, and other styles

33

Roy, Somnath, Guruswami Gurusubramanian, and Senthil Kumar Nachimuthu. "Anti-mite activity ofPolygonum hydropiperL. (Polygonaceae) extracts against tea red spider mite,Oligonychus coffeaeNietner (Tetranychidae: Acarina)." International Journal of Acarology 37, no. 6 (December 2011): 561–66. http://dx.doi.org/10.1080/01647954.2010.531764.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Roy, Somnath, Ananda Mukhopadhyay, and G. Gurusubramanian. "Anti-mite activitiesof Clerodendrum viscosumVentenat (Verbenaceae) extracts on tea red spider mite,Oligonychus coffeaeNietner (Acarina: Tetranychidae)." Archives Of Phytopathology And Plant Protection 44, no. 16 (July 11, 2011): 1550–59. http://dx.doi.org/10.1080/03235408.2010.510827.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Holland, J. M., and R. B. Chapman. "Comparative toxic and sublethal effects of fluvalinate on two-spotted spider mite and European red mite." Experimental and Applied Acarology 19, no. 10 (October 1995): 549–70. http://dx.doi.org/10.1007/bf00048811.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Ferraz, José Cláudio Barros, Cláudia Helena Cysneiros Matos, Carlos Romero Ferreira de Oliveira, Maria das Graças Rosa de Sá, and Antônia Gilciléia Cunha da Conceição. "Acaricidal activity of juazeiro leaf extract against red spider mite in cotton plants." Pesquisa Agropecuária Brasileira 52, no. 7 (July 2017): 493–99. http://dx.doi.org/10.1590/s0100-204x2017000700003.

Full text

Abstract:

Abstract: The objective of this work was to evaluate the toxicity, repellency, efficiency, and phytotoxicity of the aqueous extract of juazeiro (Ziziphus joazeiro) leaves in the control of the red spider mite, Tetranychus ludeni, on cotton plant. For toxicity evaluation, T. ludeni adult females were put on cotton leaf discs sprayed with the juazeiro extract. The repellent effect was verified in arenas that contained cotton leaf discs treated or not with the aqueous extract. The control efficiency of the juazeiro extract was evaluated by the infestation of cotton plants by adult female mites, followed by spraying with the extract. Measured LC50 was 3.54% (m/v), with 76.47% mortality and repellent effect. There was control efficiency for 120 hours, with 78.02% average, without significant difference between the evaluation intervals. Cotton plants did not show phytotoxicity. The juazeiro aqueous extract shows potential as an alternative control of T. ludeni on cotton plant due to its high toxicity, repellent effect, and efficiency in causing mortality, without being phytotoxic to cotton plants.

APA, Harvard, Vancouver, ISO, and other styles

37

Warabieda, Wojciech, and Mike Solomon. "Influence of leaf pubescence on the behavior of the two-spotted spider mite (Tetranychus urticae) and the European red mite (Panonychus ulmi)." Acta Agrobotanica 56, no. 1-2 (2013): 109–15. http://dx.doi.org/10.5586/aa.2003.011.

Full text

Abstract:

Movement behavior of two mite species: two-spotted spider mite (Tetranychus urticae) and European red mite (Panonychus ulmi) on leaves of some apple cultivars (´Greensleeves´, ´Spartan' and SA 455-2 selection) with different density of pubescence was analysed. Assessment of the leaf pubescence density was performed using an originally developed quick method based on digital pubescence mage analysis. For P.ulmi, both stop time and average speed did not depend on kind of leaf. In contrary. T.urticae revealed higher movement activity on slight pubescent leaves compared to leaves with high leaf hair density.

APA, Harvard, Vancouver, ISO, and other styles

38

Mazid, Salma, J. C. Kalita, and R. C. Rajkhowa. "Biocontrol potential ofPenicillium citrinumandPenicillium chrysogenumagainst red spider mite,Oligonychus coffeaenietner infesting tea." Journal of Entomological Research 40, no. 1 (2016): 43. http://dx.doi.org/10.5958/0974-4576.2016.00008.6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Chandra Sekhar, D., D. Jagdishwar Reddy, S. J. Rahman, A. Ranga Reddy, and V. V. Narendranath. "ECOLOGY AND MANAGEMENT OF RED SPIDER MITE, TETRANYCHUS URTICAE KOCH ON GRAPE." Acta Horticulturae, no. 785 (May 2008): 335–42. http://dx.doi.org/10.17660/actahortic.2008.785.42.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Baruah, Novonita. "Myco-Biocontrol of Red Spider Mite (Oligonychus Coffeae,Nietner) Using Metarhizium Anisopliae." International Journal for Research in Applied Science and Engineering Technology V, no. X (October 30, 2017): 1800–1804. http://dx.doi.org/10.22214/ijraset.2017.10264.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Cuthbertson, A. G. S., and A. K. Murchie. "European red spider mite - an environmental consequence of persistent chemical pesticide application." International Journal of Environmental Science & Technology 2, no. 3 (September 2005): 287–90. http://dx.doi.org/10.1007/bf03325888.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Dutta, NK, SN Alam, MK Uddin, M. Mahmudunnabi, and MF Khatun. "Population abundance of red spider mite in different vegetables along with its spatial distribution and chemical control in brinjal (Solanum melongena L.)." Bangladesh Journal of Agricultural Research 37, no. 3 (October 7, 2012): 399–404. http://dx.doi.org/10.3329/bjar.v37i3.12083.

Full text

Abstract:

Population abundance of red spider mite, Tetranychus urticae Koch., was studied in cucmber, ribbed gourd, bitter gourd, snake gourd, aroids and teasle gourd and efficacy of four new acaricides were tested against this pest in brinjal at the farmers field of Norsingdi during 2009-2010. At the same time, the spatial distribution of this pest in brinjal crop was also studied. Results indicated that all the surveyed vegetables except bitter gourd were attacked by the mite with varying levels of infestation. However, the highest mite population per leaf was observed in brinjal (32.27) which was followed by cucumber (16.08) and teasle gourd (7.2). Mites were most densely populated in the lower canopy region in the brinjal plant. Among the tested acaricides, Lakad 1.8 EC (Abamectin) provided the highest (83.4%) reduction of mite population over control, although the other acaricides also gave good control of this pest. Bangladesh J. Agril. Res. 37(3): 399-404, September 2012 DOI: http://dx.doi.org/10.3329/bjar.v37i3.12083

APA, Harvard, Vancouver, ISO, and other styles

43

Roy, Somnath, Anjali Km Prasad, Gautam Handique, and Bipanchi Deka. "Susceptibility to acaricides and detoxifying enzyme activities in the red spider mite, Oligonychus coffeae Nietner (Acari: Tetranychidae)." Acarologia 58, no. 3 (June 1, 2018): 647–54. http://dx.doi.org/10.24349/acarologia/20184261.

Full text

Abstract:

Susceptibility of red spider mite, Oligonychus coffeae Nietner (Acari: Tetranychidae), collected from conventionally-managed (synthetic acaricide usage) versus an organicallymanaged (no acaricide usage) tea plantations in Assam, India, to five synthetic acaricides was determined in laboratory bioassays. Activity of three principal detoxifying enzymes of these mite populations was also assayed. The median lethal concentrations (LC50) of ethion, dicofol, propargite, fenpropathrin, and fenazaquin were 1049.75, 599.21, 232.03, 11.44, and 6.75 ppm, respectively. Field rates of these acaricides were compared with 95% lethal concentration (LC95 in ppm) values, and a decrease in the susceptibility of the test population to ethion, propargite, dicofol and fenpropathrin was observed. There was no change for fenazaquin which was effective at lower doses than the recommended dose. Of all the acaricides tested, fenazaquin was the most toxic and ethion was the least toxic. General esterases (GEs), glutathione- S-transferase (GST), and cytochrome P450 monooxygenases exhibited a higher activity in mite population from the conventionallymanaged tea plantation as compared with the activity in mites from the organicallymanaged tea plantation. These findings may be helpful in the selection of acaricides and in developing resistance management strategies for an effective management program for this major tea pest.

APA, Harvard, Vancouver, ISO, and other styles

44

Mutisya, Daniel, E. Banhawy, and Evelyn Cheramgoi. "Positive Yield Impact of Predacious Mites in Tea Production Areas of Kenya." Sustainable Agriculture Research 7, no. 3 (April 26, 2018): 1. http://dx.doi.org/10.5539/sar.v7n3p1.

Full text

Abstract:

Tea agro ecosystems are least disturbed in comparison to other crop systems due to the plant canopy type. A survey on predacious mites’ abundance and impact on leaf yield in different tea production areas was carried out in 2014-2015 in Kenya. Major pest species were the red spider mite Oligonychus coffeae and the yellow thrip, Scirtothrips dorsalis. The red crevice mite, Brevipalpus phoenicis was found in few areas and in low numbers. Predacious mites of Phytoseiidae Family were highest at 5.8 and 6.8 mites per sample during dry and wet seasons, respectively. Phytoseiid abundance during the dry and wet seasons did not differ much within most sample sites. Presence of phytoseiid mites in combination with NPK-fertilizer-high altitude led to the strongest correlation to leaf yield than any other combination variable. High phytoseiid density- high altitude was third with positive impact to yield increase after high altitude combined with NPK-fertilizer. The findings here show contributory positive impact of phytoseiids in tea leaf yield in an agro eco-system.

APA, Harvard, Vancouver, ISO, and other styles

45

Altincicek, Boran, Jennifer L. Kovacs, and Nicole M. Gerardo. "Horizontally transferred fungal carotenoid genes in the two-spotted spider mite Tetranychus urticae." Biology Letters 8, no. 2 (September 14, 2011): 253–57. http://dx.doi.org/10.1098/rsbl.2011.0704.

Full text

Abstract:

Carotenoids are organic pigments commonly synthesized by plants, algae and some micro-organisms. Through absorption of light energy, carotenoids facilitate photosynthesis and provide protection against photo-oxidation. While it was presumed that all carotenoids in animals were sequestered from their diets, aphids were recently shown to harbour genomic copies of functional carotenoid biosynthesis genes that were acquired via horizontal gene transfer from fungi. Our search of available animal transcripts revealed the presence of two related genes in the two-spotted spider mite Tetranychus urticae . Phylogenetic analyses suggest that the T. urticae genes were transferred from fungi into the spider mite genome, probably in a similar manner as recently suggested for aphids. The genes are expressed in both green and red morphs, with red morphs exhibiting higher levels of gene expression. Additionally, there appear to be changes in the expression of these genes during diapause. As carotenoids are associated with diapause induction in these animals, our results add to recent findings highlighting the importance of eukaryotic horizontal gene transfer in the ecology and evolution of higher animals.

APA, Harvard, Vancouver, ISO, and other styles

46

Tomimori, Daichi, Munetaka Hosokawa, Shinichi Aoki, and Masahiro Osakabe. "Effects of Growth Phase and Ultraviolet-B Pretreatment in Perilla Leaves on the Two-Spotted Spider Mite." Environmental Entomology 49, no. 4 (May 27, 2020): 886–94. http://dx.doi.org/10.1093/ee/nvaa055.

Full text

Abstract:

Abstract Perilla, Perilla frutescens (L.) Britton var. crispa (Thunb.) H. Deane, is traditionally cultivated as an edible/medicinal crop in East Asia. Its essential oil contains many bioactive compounds that are expected to have high pharmacological functionality, as well as antimicrobial and insecticidal activity. Spider mites are a major pest group for perilla cultivation. The two-spotted spider mite, Tetranychus urticae Koch, possesses divergent detoxification enzymes and has developed resistance against most acaricides. The essential oil content of perilla halves from the pre-flowering phase to the flowering phase, and ultraviolet (UV)-B radiation generally increases defense compounds. To clarify the effects of this change in essential oil content and the effects of UV-B pretreatment, we investigated the developmental success and egg production of T. urticae on leaves from the preflowering and flowering phases cultivated with and without nighttime UV-B irradiation. Both the parameters significantly increased on leaves from the flowering phase in comparison with that from the preflowering phase, suggesting that constitutively produced essential oil provided protection against mite pests in a growth phase-specific manner. The defense system also extended the developmental period of mites on red perilla leaves, but not on green perilla leaves, in preflowering phase. Although egg production was lower on red perilla leaves pretreated with UV-B, no negative effects were caused on the developmental success and duration on red and green perilla and the egg production on green perilla by UV-B pretreatment. Our findings reveal a significant impact of investment allocation of perilla plants and a small contribution of UV-B irradiation to the plant defense system.

APA, Harvard, Vancouver, ISO, and other styles

47

Roy, Somnath, Narayanannair Muraleedharan, Gautam Handique, Azizur Rahman, and Archita Barua. "Aqueous extracts of Duranta repens (Verbenaceae) as an alternative to control tea red spider mite, Oligonychus coffeae (Acari: Tetranychidae)." International Journal of Tropical Insect Science 36, no. 02 (March 16, 2016): 82–90. http://dx.doi.org/10.1017/s1742758416000047.

Full text

Abstract:

AbstractWe evaluated an aqueous extract ofDuranta repensL. in the laboratory against the tea red spider mite,Oligonychus coffeaeNietner, to determine its effect on adult mortality, viability of eggs, oviposition deterrence and repellent properties. We also evaluated the same extract in the field to determine its effect on mite populations. The direct spray method was used in the laboratory at concentrations of 2, 4, 6, 8 and 10 g/l. Mortality ofO. coffeaewas dependent on both concentration and time after application. Deposition of eggs by adult mites on treated leaf surfaces decreased and the viability of eggs was also reduced. Its bioefficacy was comparable to that of the commonly used commercial neem oil formulation (azadirachtin 0.03EC). In addition, different concentrations of the aqueous extract ofD. repensalso exhibited repellent properties against adult mites. In the field, the application of the aqueous extract ofD. repensreduced the mite population and its bioefficacy was comparable to that of the synthetic pesticide Propargite 57 EC. No phytotoxic effect was observed when tea bushes were sprayed with different concentrations ofD. repens. Tea samples were taint free. Treatment of plants with the extract did not affect the quality (appearance of liquor, flavour, taint and taste) of made tea. Availability and distribution of this plant in and around tea growing areas of Assam, along with its processing, and the possibility of includingD. repensextracts in the current IPM programme are discussed.

APA, Harvard, Vancouver, ISO, and other styles

48

Jensen, A., and D. S. Mingochi. "CHEMICAL CONTROL OF RED SPIDER MITE (TETRANYCHUS URTICAE KOCH) ON TOMATOES IN ZAMBIA." Acta Horticulturae, no. 218 (January 1988): 275–80. http://dx.doi.org/10.17660/actahortic.1988.218.33.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Ganai, Suheel Ahmad, Hafeez Ahmad, Devinder Sharma, Sonika Sharma, Thanlass Norboo, Nadeya Khaliq, and Divya Chaand. "Seasonal incidence of red spider mite, Tetranychus urticae Koch infesting marigold in Jammu." Indian Journal of Entomology 80, no. 2 (2018): 524. http://dx.doi.org/10.5958/0974-8172.2018.00096.2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Roy, S., G. Handique, F. R. Bora, and A. Rahman. "Evaluation of certain nonconventional plant based oils against red spider mite of tea." Journal of Environmental Biology 39, no. 1 (January 1, 2018): 1–4. http://dx.doi.org/10.22438/jeb/39/1/mrn-491.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Red spider mite'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles