Given, in part, on 13 December 13 2010 at the 58th Annual Meeting of the Entomological Society of America in San Diego, California.
Effects of Cry34/35Ab1 corn on the survival and development of western corn rootworm, Diabrotica virgifera virgifera†
Version of Record online: 29 OCT 2012
© 2012 Society of Chemical Industry
Pest Management Science
Volume 69, Issue 6, pages 709–716, June 2013
How to Cite
Rudeen, M. L. and Gassmann, A. J. (2013), Effects of Cry34/35Ab1 corn on the survival and development of western corn rootworm, Diabrotica virgifera virgifera. Pest. Manag. Sci., 69: 709–716. doi: 10.1002/ps.3425
- Issue online: 10 MAY 2013
- Version of Record online: 29 OCT 2012
- Accepted manuscript online: 19 SEP 2012 03:37AM EST
- Manuscript Accepted: 19 SEP 2012
- Manuscript Revised: 24 AUG 2012
- Manuscript Received: 17 APR 2012
- Bacillus thuringiensis;
- blended refuge;
- developmental delay;
- feeding preference;
- insect resistance management
The western corn rootworm, Diabrotica virgifera virgifera LeConte, is a major agricultural pest that is managed with transgenic corn, Zea mays L., expressing genes from Bacillus thuringiensis Berliner (Bt). The effects of Bt corn producing Cry34/35Ab1 (event DAS-59122–7) and entomopathogens on the survival and development of larval D. v. virgifera were examined in laboratory, field and greenhouse experiments.
Larvae preferred non-Bt over Bt corn in a laboratory experiment, and there was higher recovery from non-Bt corn than from Bt corn in a field experiment. In a greenhouse study, survival at 17 days did not differ significantly among non-Bt corn, Bt corn and a blend of Bt and non-Bt corn, but development was delayed on Bt corn. Older larvae fed non-Bt corn had lower survival when entomopathogenic nematodes were added, but no other effects of pathogen were detected.
Bt corn producing Cry34/35Ab1 delayed larval development of D. v. virgifera and deterred feeding. In a mixture of Bt and non-Bt corn, larval development and survival were similar to non-Bt corn alone, suggesting that non-Bt plants in a blended refuge or a pure stand may produce a similar number of adult insects, and that timing of adult emergence may also be similar. © 2012 Society of Chemical Industry