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Susceptibility of Plutella xylostella (Lepidoptera: Plutellidae) to emamectin benzoate and lambda-cyhalothrin in the greater Accra region of Ghana


Botwe, PK and Vincent, EY and Ebenezer, OO, Susceptibility of Plutella xylostella (Lepidoptera: Plutellidae) to emamectin benzoate and lambda-cyhalothrin in the greater Accra region of Ghana, International Journal of Agricultural Science Research, 1, (1) pp. 10-15. ISSN 2327-3321 (2012) [Refereed Article]

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2012 Academe Research Journals

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Plutella xylostella is a serious pest of brassicae and a threat to cabbage production in Ghana. Following complaints of farmers about the failure of insecticides to control the diamondback moth, we investigated the susceptibility of the diamondback moth to emamectin benzoate and lambda-cyhalothrin insecticides which are commonly used in the diamondback moth control in the greater region of Accra, Ghana. We also investigated the carboxylesterases levels in these populations of the Diamondback moth. Five populations of P. xylostella were collected from greenhouses and outdoor crops at Haatso farm, University of Ghana farm, Korle-Bu farm, Dzorwulu farm, Opeibea farm and bred in the laboratory for two generations and the progeny used for laboratory bioassay using topical application and compared with a reference susceptible strain. Protein levels of the individual strains were determined and carboxylesterase activities were measured using a spectrophotometer at 600 nm. P. xylostella collected in Opeibea farm exhibited the highest level of resistance of 62.4-fold and 10.5-fold for lambda-cyhalothrin and Emamectin benzoate respectively while the carboxylesterase activity levels ranged from 7.8 to 79.2 nmol/ 10 min/ μg protein in the various populations with Dzorwulu population exhibiting the highest level of activity. The current findings have serious implications for brassica production in Ghana considering the fact that farmers rely mainly on insecticides for diamondback moth control. A coordinated resistance management program needs to be implemented with the involvement of pesticide industry, local pesticide regulatory authorities, scientists and farmers.

Item Details

Item Type:Refereed Article
Keywords:Plutella xylostella, Emamectin benzoate, lambda-cyhalothrin, insecticide resistance, brassica, diamondback moth
Research Division:Environmental Sciences
Research Group:Pollution and contamination
Research Field:Pollution and contamination not elsewhere classified
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Control of pests, diseases and exotic species in terrestrial environments
UTAS Author:Botwe, PK (Mr Paul Botwe)
ID Code:110895
Year Published:2012
Deposited By:Zoology
Deposited On:2016-08-22
Last Modified:2016-10-17

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