Productivity and resistance of okra (Abelmoschus spp.) to the cotton aphid Aphis gossypii glover (Hemiptera: Aphididae) under tropical conditions

Abang, Albert Fomumbod; Srinivasan, Ramasamy; Hanna, Rachid; Fotso, Apollin Kuate; Kekeunou, Sévilor; Tenkouano, A.; Bilong, Charles-Félix Bilong

doi:10.1007/s42690-020-00193-w

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…However, the variability in the response in contrasting environments, especially with respect to the local varieties, provides a highly relevant set of database on the effects of genotype and location on 10 okra accessions. The accessions evaluated in this study are a combination of aphid-resistant accessions identi ed following a series of previous screening in one environment (Abang et al 2014b(Abang et al , 2020, all with signi cant contributions to food, nutritional security, and sustainable livelihoods in diverse agroecological landscape of Central Africa. The Central African agro-ecology is represented in the four agroecologies where the germplasms representing the genotypes tested, were evaluated (Robiglio and Sinclair 2011).…”

Section: Discussionmentioning

confidence: 99%

“…The Plant Genetic Resources Conservation Unit, Southern Regional Plant Introduction Station, University of Georgia, USDA-ARS (2971 accessions); is the biggest sector for public collections of Abelmoschus germplasm; WorldVeg currently has 1873 okra accessions, while the Agricultural Plant Genetic Resources Conservation and Research Centre in Sudan follows (Scha eitner et al 2021). Several studies have been conductive with accessions from WorldVeg for resistance to pests of okra such as Aphis gossypii, a notorious okra pests (Abang et al 2014a(Abang et al , 2016(Abang et al , 2018(Abang et al , 2020. WorldVeg gene bank also offers a broader pool of okra required for a robust screening for desirable horticultural traits, yield and resistance to pests and diseases.…”

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confidence: 99%

“…It is only in West and Central Africa where 10% of world production(Iwu 2014) is obtained, that common A, esculentus and the West African A. caillei are both grown. Both species can now be found at equal percentage in the market (Grubben and Denton 2004) as A. caillei is now replacing A, esculentus in the tropical-humid regions because of its adapts better and tolerates more biotic stresses(Siemonsma 1982).VI060794 is A. caillei and could produce the highest yield in all locations and seasons than other accessions, but not signi cantly different from the farmers' varieties Abang et al (2020). recently revealed that local okra germplasms in Cameroon are dominated by A. caillei and were more productive than the A. esculentus.…”

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confidence: 99%

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New okra germplasm for the management of aphids in the diverse ecological landscape of Central Africa

Abang,

Sriniva,

Kekeunu

et al. 2023

Preprint

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Ten okra accessions reported as resistant to aphids were compared in four agro-ecological zones of Cameroon with local varieties used by farmers under field conditions. This study was carried out over two seasons (March - July and September - December 2014) in four locations, representing four Cameroon agro-ecologies. The essence was to evaluate yield performance and test resistance to Aphis gossypii under different agro-ecologies. Aphid populations and yield parameters were evaluated. The R software package metan was activated to do analysis of stability using the multiple environment data. For all data, Breeding Values were predicted using Linear mixed model by performing best linear unbiased prediction on each genotype and for genotype by location interactions. The area under infestation pressure curve was calculated using aphid count data and the values used to estimate mean and standard deviation, and subjected to resistance analysis. For aphid abundance the lowest breeding value (-2.20) was for the Local and the highest (+ 2.33) for the most susceptible improved genotype. Two of the genotypes, Local (the most susceptible) and VI060794 (one of the moderately resistant) had the highest yield prediction per hectare and pods per plant. Dissemination of high-yielding and aphid resistant genotypes such as VI060794 stands the change of alleviating poverty and nutrient security within the sub region of Central Africa through reduction in cost of production from use of pesticide. The superior performance of VI060794 across ecological zones could be integrated in IPM of aphids and breeding to improve the performance of local germplasms.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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New okra germplasm for the management of aphids in the diverse ecological landscape of Central Africa

Abang,

Sriniva,

Kekeunu

et al. 2023

Preprint

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“…Damage caused by A. gossypii includes reduction in yield and fruit quality as well as virus transmission 1,2 . The high infestation and severity of damage by this pest has led to rampant use of chemical insecticides for its control 3,4 . Consequently, A. gossypiis has developed resistance to a wide range of insecticides, including organophosphates, carbamates, pyrethroids and neonicotinoids 5‐10 .…”

Section: Introductionmentioning

confidence: 99%

An insecticide phenotypic resistance diagnostic kit for cotton aphid Aphis gossypii Glover (Hemiptera Aphididae)

Huang

Yang

et al. 2022

Pest Management Science

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Background: Aphis gossypii is a notorious pest worldwide, and evidence of resistance of A. gossypii to various insecticides has been documented. Diagnostic tools for the rapid and accurate assessment of insecticide resistance are urgently needed to implement effective pest control and insecticide resistance management strategies.Results: Using this diagnostic kit based on the glass vial bioassay, detection results can be obtained in 3 h and the values of 897.86, 133.57, 12 037.45, 2849.26, 19 457.33 and 215.60 ng/cm 2 were finally identified as the actual diagnostic doses of imidacloprid, acetamiprid, thiamethoxam, nitenpyram, dinotefuran and sulfoxaflor, respectively. The regression equation between mortalities under diagnostic doses and actual resistance ratios tested by the leaf-dipping method were conducted in different strains of A. gossypii, and the diagnostic mortality of A. gossypii was negatively correlated with the resistance ratio to imidacloprid (r = −0.986, P = 0.002), acetamiprid (r = −0.964, P = 0.008), thiamethoxam (r = −0.930, P = 0.022), nitenpyram (r = −0.950, P = 0.013), dinotefuran (r = −0.976, P = 0.004) and sulfoxaflor (r = −0.937, P = 0.019). Moreover, four A. gossypii field populations were selected to apply the diagnostic kit in the field.Conclusions: A diagnostic kit based on the glass vial bioassay for the rapid detection of resistance to imidacloprid, acetamiprid, thiamethoxam, nitenpyram, dinotefuran and sulfoxaflor in A. gossypii was developed. The insecticide diagnostic kit for A. gossypii can be a useful screening tool to determine effective insecticides quickly and accurately.

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Abundance of natural enemies and aphids in okra crops (Abelmoschus esculentus - Malvaceae) diversified with Tithonia rotundifolia (Asteraceae)

Guimarães DONATTI-RICALDE,

de Carvalho SILVA,

Perrone RICALDE

et al. 2023

Biological Control

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Productivity and resistance of okra (Abelmoschus spp.) to the cotton aphid Aphis gossypii glover (Hemiptera: Aphididae) under tropical conditions

Cited by 6 publications

References 27 publications

New okra germplasm for the management of aphids in the diverse ecological landscape of Central Africa

New okra germplasm for the management of aphids in the diverse ecological landscape of Central Africa

An insecticide phenotypic resistance diagnostic kit for cotton aphid Aphis gossypii Glover (Hemiptera Aphididae)

Abundance of natural enemies and aphids in okra crops (Abelmoschus esculentus - Malvaceae) diversified with Tithonia rotundifolia (Asteraceae)

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