Monday, 27 October 2003
D0077

This presentation is part of : Student Competition Display Presentations, Section Cd. Behavior and Ecology

The pre- or post-mating dispersal of European corn borer's resistant evolution to Bt-corn

Yang Hu and D. A. Andow. University of Minnesota, Department of Entomology, 219 Hodson Hall, 1980 Folwell Ave, St. Paul, MN

Bt-corns are very efficient to control its main insect pest, European corn borer (Ostrinia nubilis (Hubner)). However, European corn borer will become resistant to the Bt-corn by alteration its population genetic characteristics. Mating behavior relates to the genetic characteristics that change between the parental generation and the next progeny generation. If the parental adults mate before dispersal, it enhances the probability of same genotypes mating events. For example, resistant genotype mates with resistant genotype because they are physical close. This invalidates one of the assumptions of the high dose plus refuge strategy. My objective is to examine the female's pre- or post-mating dispersal behavior during their first emergency night. A model will be constructed to simulate the resistant frequency change based on the females pre- or post-mating dispersal.

Species 1: Lepidoptera Crambidae Ostrinia nubilalis (European corn borer)
Keywords: insecticide resistance, mating behavior

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