Effect of crude extracts of mixtures of different plant species in the control of<i>Megalurothrips sjostedti</i>Trybom. and pod setting of cowpea plants

Oparaeke, A. M.

doi:10.1080/03235400500383909

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…The cumulative effects resulting from the use of these synthetic chemical compounds had diverted the attention of most chemists and environmentalists to the search of compounds from natural sources which are directly or indirectly non-toxic to humans, wildlife and the ecosystem. Leaves, seeds, barks and roots of plants have been investigated by many researchers by isolating, identifying and screening for chemical compounds that deter and inhibit growth of pest (Oparaeke, 2007). The objective of the research is to deduce the efficacy of Hyptis suaveolens and Hyptis spicigera extracts on cowpea weevil (Callosobruchus maculatus) in terms of anti-feedant property and mortality rate.…”

Section: Introductionmentioning

confidence: 99%

Pesticidal Effects of Extracts from Hyptis suaveolens and Hyptis spicigera on Cowpea Weevils

Appiah¹,

Valentine²,

Adom³

et al. 2018

IJEAB

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This experimental research was conducted with the view of determining the effectiveness of Hyptis suaveolens and Hyptis spicigera extracts on cowpea seeds in deterring the feeding habit and life span of cowpea weevils. Masses of 400 and 500 grammes of pulverized samples of the two plants, Hyptis suaveolens and Hyptis spicigera were separately extracted by percolation with 2200 millilitres of 95% ethanol respectively. The percolates were evaporated to dryness at room temperature to give crude extracts of both plants which were each subjected to a partition process. Soluble solvent extracts of the two plants were applied on cowpea seeds and subjected to cowpea weevils by two-choice feeding deterrent method. The chloroform soluble extracts were found to be most active extracts of both plants with the least percentage consumption indices and higher percentage mortalities. This was a clear indication that these chloroform soluble extracts contained most of the toxic component(s) of the plants which can be used to protect cowpea seeds to some period of time. The study tasks the Ministry of Food and Agriculture to consider providing funding a nd further research into the use of the pesticides from these plant extracts to maintain the buoyancy of biodiversity as well as the environment in Ghana.

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Section: Introductionmentioning

confidence: 99%

Pesticidal Effects of Extracts from Hyptis suaveolens and Hyptis spicigera on Cowpea Weevils

Appiah¹,

Valentine²,

Adom³

et al. 2018

IJEAB

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show abstract

“…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. However, chemical control is still the most efficient measure for thrips control in cowpea production due to the high activity of synthetic pesticides (Oparaeke et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…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. However, chemical control is still the most efficient measure for thrips control in cowpea production due to the high activity of synthetic pesticides ( Oparaeke et al 2007 ).…”

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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Homemade Preparations of Natural Biopesticides and Applications

Adetunji¹,

Egbuna²,

Tijjani³

et al. 2020

Natural Remedies for Pest, Disease and Weed Control

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Effect of crude extracts of mixtures of different plant species in the control ofMegalurothrips sjostedtiTrybom. and pod setting of cowpea plants

Cited by 3 publications

References 11 publications

Pesticidal Effects of Extracts from Hyptis suaveolens and Hyptis spicigera on Cowpea Weevils

Pesticidal Effects of Extracts from Hyptis suaveolens and Hyptis spicigera on Cowpea Weevils

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

Homemade Preparations of Natural Biopesticides and Applications

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