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Insecticide resistance in Bemisia tabaci from Cyprus

Insect Science 2011年第1期18卷 30-39页

作者： Vassilis Vassiliou maria emmanouilidou Andreas Perrakis Evangelia Morou John Vontas Anastasia Tsagkarakou Emmanouil Roditakis Agricultural Research Institute Nicosia Cyprus Faculty of Biotechnology and Appfied Biology Department of Biology University of Crete Herakfion Greece National Agricultural Research Foundation (N.AG.RE.F.) Plant Protection Institute of Heraklion Heraklion Greece

A comprehensive study on the Bemisia tabaci （biotype B） resistance to neonicotinoid insecticides imidacloprid, acetamiprid and thiamethoxam, and pyrethroid bifenthrin was conducted in Cyprus. The resistance level to eight field-collected B. tabaci populations was investigated. The activities of enzymes involved in metabolic detoxification and the frequencies ofpyrethroid and organophosphates target site resistance mutations were determined. Moderate to high levels of resistance were detected for imidacloprid （re- sistance factor [RF] 77-392） and thiamethoxam （RF 50-164） while low resistance levels were observed for acetamiprid （RF 7-12）. Uniform responses by the Cypriot whiteflies could be observed against all neonicotinoid insecticides. No cross-resistance between the neonicotinoids was detected as well as no association with the activity of the P450 microsomal oxidases. Only imidacloprid resistance correlated with carboxylesterase activity. Low to extremely high resistance was observed for insecticide bifenthrin （RF 49 1 243） which was associated with the frequency of the resistant allele in the sodium channel gene but not with the activity of the detoxification enzymes. Finally, the F331W mutation in the acetylcholinesterase enzyme acel gene was fixed in all B. tabaci populations from Cyprus.

关键词： acetamiprid B biotype Bemisia tabaci bifenthrin Cyprus imidacloprid insecticide resistance thiamethoxam

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