HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Google Scholar Articles by Krupke, C. Articles by Conley, S. P. PubMed Articles by Krupke, C. Articles by Conley, S. P. Agricola Articles by Krupke, C. Articles by Conley, S. P. Related Collections Insect Resistance

NOTES & UNIQUE PHENOMENA

Volunteer Corn Presents New Challenges for Insect Resistance Management

^a Dept. of Entomology, Purdue Univ., West Lafayette, IN 47907
^b Dep. of Botany and Plant Pathology, Purdue Univ, West Lafayette, IN 47907
^c Dep. of Horticulture. and Landscape Architecture, Purdue Univ., W. Lafayette, IN 47907
^d Dep. of Agronomy, Univ. of Wisconsin, Madison, WI 53706

^* Corresponding author (ckrupke{at}purdue.edu).

Genetically-modified (GM) corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] dominate the North American agricultural landscape and are becoming increasingly important as biofuels. However, as herbicide-tolerance and insecticidal traits are often simultaneously expressed by individual plants, glyphosate [N-(phosphonomethyl) glycine]-resistant (GR) volunteer corn is becoming a widespread problem as a weed in corn-soybean rotational systems. We show that these volunteer corn plants not only have herbicide-tolerance genes but also express insecticidal "Bt" protein. We also report high levels of damage to these plants from larvae of the target pest, the western corn rootworm (WCR, Diabrotica virgifera virgifera LeConte). This suggests that volunteer herbicide-tolerant Bt corn has the potential to present problems both for weed management and insect resistance management, as it may facilitate more rapid evolution of Bt resistance in corn rootworm populations.

Abbreviations: Bt, Bacillus thuringiensis • GM, genetically modified • GR, glyphosate resistant/resistance • WCR, western corn rootworm

All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.

Received for publication October 24, 2008.