Journal of Economic Entomology (2006) 99, 927-930

Timothy M. Nowatzki, Xuguo Zhou, Lance J. Meinke, Ty Vaughn and Blair D. Siegfried (2006)
Effect of Bacillus thuringiensis Cry3Bb1 protein on the feeding behavior and longevity of adult western corn rootworms (Coleoptera: Chrysomelidae)
Journal of Economic Entomology 99 (3), 927-930
Abstract: The first transgenic corn hybrids expressing the Bacillus thuringiensis (Bt) Cry3Bb1 protein to control corn rootworm (Diabrotica spp.) larvae were registered for commercial use in 2003. This study was conducted to investigate the effect of Cry3Bb1 protein in combination with a cucurbitacin bait on adult feeding and longevity of both organophosphate-resistant and -susceptible western corn rootworms, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae). In choice and no-choice tests, possible repellency to the Bt protein was quantified by comparing beetle consumption of cellulose disks treated with three concentrations of Bt in combination with a feeding stimulant (Invite EC) to disks treated with stimulant alone. A lethal-time assay also was conducted to examine survival of beetles exposed to Bt protein in their diet. Results from these assays indicate that adult rootworms are not significantly deterred by the presence of Cry3Bb1 on the treated discs and that ingestion of toxin does not adversely affect adult longevity.
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Database assignments for author(s): Blair D. Siegfried

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Diabrotica virgifera	Maize/corn (Zea mays)	U.S.A. (mid N)
Bacillus thuringiensis genes in crops (entomopathogen)	Diabrotica virgifera	Maize/corn (Zea mays)	U.S.A. (mid N)
Bacillus thuringiensis Cry3B-toxin (entomopathogen)	Diabrotica virgifera	Maize/corn (Zea mays)	U.S.A. (mid N)