Incidence of Flowerbud Thrips, <i>Megalurothrips Sjostedti</i> Trybom (Thysanoptera: Thripidae) on Resistant and Susceptible Cowpea Cultivars Intercropped with Maize

Gethi, M.; Mueke, J. M.

doi:10.1080/00128325.1995.11663263

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Maize could have also created a micro‐environment that reduced the thrips population because of reduced light reaching the canopy or it acted as unsuitable host plant. These results are in line with those of Gethi & Mueke (1995) where intercropping maize and cowpea gave a greater reduction in thrips population than on the monocrop of cowpea. However, they differ with those made by Coll & Bottrell (1995) where densities of thrips did not differ significantly in mono and diculture plots of beans and maize.…”

Section: Discussionmentioning

confidence: 99%

Cropping system influences Tomato spotted wilt virus disease development, thrips population and yield of tomato (Lycopersicon esculentum)

Ramkat

Wangai

Ouma

et al. 2008

Annals of Applied Biology

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Yield of tomato is limited by many diseases including Tomato spotted wilt virus disease. This study was conducted in the field at Kenya Agriculture Research Institute Njoro, Kenya, in 2004 and 2006 to determine the effect of intercropping on disease development, thrips population and yield of tomato variety Cal J grown under four intercrop systems involving kale, onion, maize and sole tomato. The experimental design was a Randomised Complete Block Design (RCBD) replicated three times. Disease scores on tomato-maize differed significantly from tomato-kale and tomato-onion in both years of the study. Maize cropping system had a low significant thrips population from the other cropping systems. Tomato-maize intercrop produced the lowest fruit weights and marketable yield in 2004 and 2006, while yield of onion, kale and maize in intercrops were not significantly different from their monocrops. Land equivalent ratio was >1 in all the cropping systems.

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Section: Discussionmentioning

confidence: 99%

Cropping system influences Tomato spotted wilt virus disease development, thrips population and yield of tomato (Lycopersicon esculentum)

Ramkat

Wangai

Ouma

et al. 2008

Annals of Applied Biology

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“…In addition, M. usitatus can also transmit a variety of plant viruses ( Prasada Rao et al 2003 , Sonali Shukla et al 2005 ). Current control measures for thrips in cowpea management include cultivation of resistant varieties ( Alabi et al 2003 , Abudulai et al 2006 , Omo-Ikerodah et al 2008 , Togola et al 2019 ), interplanting with graminaceous crops, such as corn and sorghum ( Kyamanywa and Tukahirwa 1988 , Gethi and Mueke 1995 , Adati et al 2007 ), and physical and chemical trapping technologies ( Abtew et al 2015 , Diabate et al 2019a , 2019b , Liu et al 2020 ). Biocontrol methods, such as the use of predatory insects and mites ( Gitonga et al 2002 , Liu et al 2018 ), pathogenic microorganisms ( Wu et al 2021 ), and botanical pesticides ( Oparaeke et al 2006 , 2007 , Oparaeke 2007 ), have also been implemented to control thrips during cowpea cultivation.…”

Section: Introductionmentioning

confidence: 99%

Assessing the effectiveness of imidacloprid and thiamethoxam via root irrigation against Megalurothrips usitatus (Thysanoptera: Thripidae) and its residual effects on cowpea

Yu,

Tariq,

Guo

et al. 2023

Journal of Economic Entomology

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Systemic neonicotinoid insecticides (NEOs) applied by seed-treatment or root application have emerged as a prevalent strategy for early-season insect pest management. This research investigated the effectiveness of imidacloprid and thiamethoxam, administered through root irrigation, in managing thrips in cowpea [Vigna unguiculata (Linn.) Walp.], and the residual properties of both insecticides in cowpea and soil. The results show that thrips density depends on the application rate of insecticides. At the maximum application rate (1,500 µg/ml, active ingredient), imidacloprid and thiamethoxam controlled thrips densities below the economic injury level (EIL, the EIL of thrips on cowpea was 7/flower) for 20 days and 25 days with the density of 6.90 and 6.93/flower at the end of the periods, respectively. Imidacloprid and thiamethoxam residues decreased gradually over time and decreased sharply after 15 days after treatment (DAT), the 2 insecticides were not detected (<0.001 mg/kg) at 45 DAT. According to our findings, the application of imidacloprid and thiamethoxam via root irrigation proved residual control lasting up to 20–25 days for controlling thrips damage at experimental rates, with a strong association to their residual presence in cowpea (0.6223 < R2 < 0.9545). Considering the persistence of the imidacloprid and thiamethoxam, the maximum tested application rate (1,500 µg/ml) was recommended. As the residues of imidacloprid and thiamethoxam were undetectable in cowpea pods at all tested rates, it may be suggested that the use of each insecticide is safe for consumers and effective against thrips, and could be considered for integrated thrips management in the cowpea ecosystem.

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Thrips in genusMegalurothrips(Thysanoptera: Thripidae): biodiversity, bioecology, and IPM

Tang

Guo

et al. 2023

Journal of Integrated Pest Management

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Currently, there are a total of 15 thrips species in the genus Megalurothrips (Thysanoptera: Thripidae). Megalurothrips sjostedti Trybom and Megalurothrips usitatus (Bagnall) are the most economically important pest species because of the serious damage they can do to leguminous crops, especially cowpea, which is an important grain crop for Africa and a vegetable crop for the rest of the world. Megalurothrips sjostedti is only distributed in Africa, while M. usitatus is widely spread in subtropical and tropical regions of the world and is more invasive. Nigeria is the only area where both thrips species are shared. Inexplicably, M. usitatus does not seriously damage cowpea in Africa. Bioecological characteristics indicated that M. usitatus adapts to a wider temperature and humidity range, which may result in its current geographic distribution. Since the 2010s, M. usitatus has received more attention and research. The integrated pest management (IPM) strategy of both thrips as case studies was reviewed in this paper, along with multiple complementary tactics, including agronomic measures, physical-chemical lure control, biological control, and chemical control, and insecticide resistance. Lessons have been learned from both M. sjostedti and M. usitatus, as well as from another widespread invasive thrips species, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), thus enhancing our overall understanding of the biology, ecology, and IPM practices of M. sjostedti and M. usitatus.

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Incidence of Flowerbud Thrips, Megalurothrips Sjostedti Trybom (Thysanoptera: Thripidae) on Resistant and Susceptible Cowpea Cultivars Intercropped with Maize

Cited by 3 publications

References 9 publications

Cropping system influences Tomato spotted wilt virus disease development, thrips population and yield of tomato (Lycopersicon esculentum)

Cropping system influences Tomato spotted wilt virus disease development, thrips population and yield of tomato (Lycopersicon esculentum)

Assessing the effectiveness of imidacloprid and thiamethoxam via root irrigation against Megalurothrips usitatus (Thysanoptera: Thripidae) and its residual effects on cowpea

Thrips in genusMegalurothrips(Thysanoptera: Thripidae): biodiversity, bioecology, and IPM

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