Genetics of spinosad resistance in a multi‐resistant field‐selected population of Plutella xylostella

Pest Management Science - Tập 60 Số 8 - Trang 827-832 - 2004
Ali H. Sayyed1, Dzolkhifli Omar2, Denis J. Wright1
1Department of Biological Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
2Department of Plant Protection, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia

Tóm tắt

Abstract

Resistance to the bacteria‐derived insecticides spinosad (Conserve), abamectin (Vertimec), Bacillus thuringiensis var kurstaki (Btk) (Dipel), B thuringiensis var aizawai (Bta) (Xentari), B thuringiensis crystal endotoxins Cry1Ac and Cry1Ca, and to the synthetic insecticide fipronil was estimated in a freshly‐collected field population (CH1 strain) of Plutella xylostella (L) from the Cameron Highlands, Malaysia. Laboratory bioassays at G1 indicated significant levels of resistance to spinosad, abamectin, Cry1Ac, Btk, Cry1Ca, fipronil and Bta when compared with a laboratory insecticide‐susceptible population. Logit regression analysis of F1 reciprocal crosses indicated that resistance to spinosad in the CH1 population was inherited as a co‐dominant trait. At the highest dose of spinosad tested, resistance was close to completely recessive, while at the lowest dose it was incompletely dominant. A direct test of monogenic inheritance based on a back‐cross of F1 progeny with CH1 suggested that resistance to spinosad was controlled by a single locus. Copyright © 2004 Society of Chemical Industry

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Pest Management Science

Tập 60 Số 8

827-832

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