Toxicity of Avermectins to Diamondback Moth (Lepidoptera: Plutellidae) Populations: Implications for Susceptibility Monitoring
نویسندگان
چکیده
J. Econ.Entomol.89(1): 33-38 (1996) ABSTRACT The susceptibility of diamondback moth, Plutella xylostella (L.), larvae to 2 avermectins, abamectin and MK-243 (4"-epi-methylamino-4"deoxyavermectinBI hydrochloride), was assessed through toxicityevaluations of 17-19 geographicallydiverse populations. Both avennectins were very potent to 3rd-instar diamondbackmoth; LC50s for abamectin and MK-243 ranged from 0.4 to 44.0 ng (AI)/ml and 0.2 to 8.0 ng (AI)/ml, respectively.Although most populations showed resistance to methomyl and permethrin, the populations were not resistant to abamectin or MK-243. Pairwise correlations indicated lack of cross or multiple resishmcebetween the avermectins and methomyl and permethrin. This informationwill serve as 1maid for resistance monitoring programs and permit comparative changes in susceptibility during commercial use. Such data are necessary to assist in decisions to recommend product lise appropriately in the context of resistance management.
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Monitoring of diamondback moth (Lepidoptera: Plutellidae) resistance to spinosad, indoxacarb, and emamectin benzoate.
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