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Effects of refuges on the evolution of resistance to transgenic corn by the western corn rootworm, Diabrotica virgifera virgifera LeConte
- Source :
- Pest Management Science. 72:190-198
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- BACKGROUND Diabrotica virgifera virgifera LeConte is a major pest of corn and causes over a billion dollars of economic loss annually through yield reductions and management costs. Corn producing toxins derived from Bacillus thuringiensis (Bt) has been developed to help manage D. v. virgifera. However, previous studies have demonstrated the ability of this species to evolve resistance to Bt toxins in both laboratory and field settings. RESULTS We used an experimental evolution approach to test the refuge strategies for delaying resistance of D. v. virgifera to corn producing Bt toxin Cry34/35Ab1. In the absence of refuges, D. v. virgifera developed resistance to Bt corn after three generations of selection. In some cases, non-Bt refuges reduced the level of resistance compared with the strain selected in the absence of refuges, but refuge strains did show reduced susceptibility to Bt corn compared with the unselected strain. CONCLUSIONS In this study, non-Bt refuges delayed resistance to Bt corn by D. v. virgifera in some cases but not others. Combining the refuge strategy with pyramids of multiple Bt toxins and applying other pest management strategies will likely be necessary to delay resistance of D. v. virgifera to Bt corn. © 2015 Society of Chemical Industry
- Subjects :
- 0106 biological sciences
0301 basic medicine
Integrated pest management
Genetically modified maize
Resistance (ecology)
biology
Diabrotica virgifera
food and beverages
General Medicine
Genetically modified crops
biology.organism_classification
01 natural sciences
010602 entomology
03 medical and health sciences
030104 developmental biology
Western corn rootworm
Agronomy
Insect Science
Bacillus thuringiensis
PEST analysis
Agronomy and Crop Science
Subjects
Details
- ISSN :
- 1526498X
- Volume :
- 72
- Database :
- OpenAIRE
- Journal :
- Pest Management Science
- Accession number :
- edsair.doi...........decc91c9f340f32da26b157b2cce4ff9