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United States Department of Agriculture

Agricultural Research Service

Research Project: EVALUATING NON-BT REFUGE NEEDS FOR THE CORN BELT: EFFECTS OF EUROPEAN CORN BORER RESISTANCE ALLELES AND MULTIPLE-TOXIN BT HYBRIDS

Location: Corn Insects and Crop Genetics Research

Project Number: 3625-22000-017-06
Project Type: Trust

Start Date: Feb 01, 2009
End Date: Sep 30, 2013

Objective:
Assess the effects of resistance alleles on the frequency, timing, and survival of interplant movement by European corn borer larvae on single- and multiple-toxin Bt hybrids. Evaluate how resistance allele frequencies influence entry into diapause, overwintering survival, and timing of European corn borer adult emergence.

Approach:
European corn borers resistant to Bt corn will be used to measure the impact of Bt resistance alleles on survival, development, and behavior. Experiments will examine how resistance alleles affect the frequency, timing, and survival of interplant movement by larvae on non-Bt, current Bt hybrids, and pending Bt hybrids ("pyramids"). The effects of Bt resistance alleles on corn borers entry into diapause, winter survival, and timing of adult emergence by overwintering generations also will be assessed.

Last Modified: 9/20/2014
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