Campus Units

Entomology

Document Type

Article

Publication Version

Published Version

Publication Date

4-1-2015

Journal or Book Title

Journal of Economic Entomology

Volume

108

Issue

2

First Page

742

Last Page

751

DOI

10.1093/jee/tou063

Abstract

Transgenic plants have been widely adopted by growers to manage the western corn rootworm, Diabrotica virgifera virgifera LeConte, in field corn. Because of reduced efficacy in some Nebraska fields after repeated use of Cry3Bb1-expressing hybrids, single plant bioassays were conducted in 2012 and 2013 to characterize the susceptibility of western corn rootworm populations to the rootworm-active proteins Cry3Bb1, mCry3A, and Cry34/35Ab1. Results demonstrate that there are heritable differences in susceptibility of Nebraska western corn rootworm populations to rootworm-active Bt traits. Proportional survival and corrected survival data coupled with field histories collectively support the conclusion that a level of field resistance to Cry3Bb1 has evolved in some Nebraska populations in response to selection pressure and that cross-resistance exists between Cry3Bb1 and mCry3A. There was no apparent cross-resistance between Cry34/35Ab1 and either Cry3Bb1 or mCry3A. The potential implications of these results on current and future corn rootworm management strategies are discussed.

Comments

This article is published as Wangila, David S., Aaron J. Gassmann, Jennifer L. Petzold-Maxwell, B. Wade French, and Lance J. Meinke. "Susceptibility of Nebraska western corn rootworm (Coleoptera: Chrysomelidae) populations to Bt corn events." Journal of economic entomology 108, no. 2 (2015): 742-751. doi: 10.1093/jee/tou063. Posted with permission.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted

Language

en

File Format

application/pdf

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