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Resurgence of the cotton bollworm Helicoverpa armigera in northern Greece associated with insecticide resistance

Insect Science 2013年第4期20卷 505-512页

作者： George K. Mironidis Despina Kapantaidaki maria bentila Evangelia Morou M. Savopoulou-Soultani John Vontas Laboratory of Applied Zoology and Parasitology Faculty of Agriculture Aristotle University of Thessaloniki Thessaloniki Faculty of Applied Biology and Biotechnology Department of Biology University of Crete Heraklion Greece

Helicoverpa armigera has been controlled effectively with chemical insec- ticides in the major cotton crop production areas of northern Greece for many years. However, a resurgence of the pest was observed in 2010, which significantly affected crop production. During a 4-year survey （2007-2010）, we examined the insecticide re- sistance status of 1-1. armigera populations from two major and representative cotton production areas in northern Greece against seven insecticides （chlorpyrifos, diazinon, methomyl, alpha-cypermethrin, cypermethrin, gamma-cyhalothrin and endosulfan）. Full dose-response bioassays on third instar larvae were performed by topical application. Lethal doses at 50% were estimated by probit analysis and resistance factors （RF） were calculated, compared to a susceptible laboratory reference stra^a. Resistance levels were relatively moderate until 2009, with resistance ratios below 10-fold for organophosphates and carbamates and up to 16-fold for the pyrethroid alpha-cypermethrin. However, resis- tance rose to 46- and 81-fold for chlorpyrifos and alpha-cypermethrin, respectively in 2010, when the resurgence of the pest was observed. None of the known pyrethroid resistance mutations were found in the pyrethroid-resistant insects. The possible association between resistance and H. armigera resurgence in Greece is discussed.

关键词： bioassay carbamates cotton field endosulfan organophospates pyrethroids

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