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Effects of refuges on the evolution of resistance to transgenic corn by the western corn rootworm, Diabrotica virgifera virgifera LeConte.
Pest Manag Sci. 2016 Jan; 72(1):190-8.PM

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.

Authors+Show Affiliations

Department of Entomology, Iowa State University, Ames, IA, USA. Department of Biological Sciences, Lock Haven University, Lock Haven, PA, USA.Department of Entomology, Iowa State University, Ames, IA, USA.Department of Entomology, Iowa State University, Ames, IA, USA.USDA-ARS, University of Missouri, Columbia, MO, USA.Department of Entomology, Iowa State University, Ames, IA, USA.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

25652190

Citation

Deitloff, Jennifer, et al. "Effects of Refuges On the Evolution of Resistance to Transgenic Corn By the Western Corn Rootworm, Diabrotica Virgifera Virgifera LeConte." Pest Management Science, vol. 72, no. 1, 2016, pp. 190-8.
Deitloff J, Dunbar MW, Ingber DA, et al. Effects of refuges on the evolution of resistance to transgenic corn by the western corn rootworm, Diabrotica virgifera virgifera LeConte. Pest Manag Sci. 2016;72(1):190-8.
Deitloff, J., Dunbar, M. W., Ingber, D. A., Hibbard, B. E., & Gassmann, A. J. (2016). Effects of refuges on the evolution of resistance to transgenic corn by the western corn rootworm, Diabrotica virgifera virgifera LeConte. Pest Management Science, 72(1), 190-8. https://doi.org/10.1002/ps.3988
Deitloff J, et al. Effects of Refuges On the Evolution of Resistance to Transgenic Corn By the Western Corn Rootworm, Diabrotica Virgifera Virgifera LeConte. Pest Manag Sci. 2016;72(1):190-8. PubMed PMID: 25652190.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of refuges on the evolution of resistance to transgenic corn by the western corn rootworm, Diabrotica virgifera virgifera LeConte. AU - Deitloff,Jennifer, AU - Dunbar,Mike W, AU - Ingber,David A, AU - Hibbard,Bruce E, AU - Gassmann,Aaron J, Y1 - 2015/02/27/ PY - 2014/11/10/received PY - 2015/01/05/revised PY - 2015/01/29/accepted PY - 2015/2/6/entrez PY - 2015/2/6/pubmed PY - 2016/10/13/medline KW - agriculture KW - insect resistance management KW - refuge strategy KW - transgenic crops SP - 190 EP - 8 JF - Pest management science JO - Pest Manag Sci VL - 72 IS - 1 N2 - 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. SN - 1526-4998 UR - https://www.unboundmedicine.com/medline/citation/25652190/Effects_of_refuges_on_the_evolution_of_resistance_to_transgenic_corn_by_the_western_corn_rootworm_Diabrotica_virgifera_virgifera_LeConte_ DB - PRIME DP - Unbound Medicine ER -