University of California

Managing resistance is critical to future use of pyrethroids and neonicotinoids


Frank G. Zalom
Nick C. Toscano
Frank J. Byrne

Authors Affiliations

R. A. Van Steenwyk is Cooperative Extension Entomologist, Department of Environmental Science, Policy, and Management, UC Berkeley; and F.G. Zalom is Entomologist, Agricultural Experiment Station, and Cooperative Extension Entomologist, Department of Entomology, UC Davis. We gratefully acknowledge the California Department of Food and Agriculture for financial support in the development of the base document, and in publication of this special issue. We also thank the many UC Cooperative Extension Specialists and Farm Advisors who provided technical expertise in the development of alternative scenarios for the specific crops studied.

Publication Information

Hilgardia 59(1):11-15. DOI:10.3733/ca.v059n01p11. January 2005.

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Synthetic pyrethroids and neonicotinoids are the most readily available alternatives to the organophosphate and carbamate insecticides. Pyrethroids have become widely used in California, and problems with insecticide resistance and nontarget impacts have already been identified. Neonicotinoids are a new class of insecticide with uses only now being realized. Managing insecticide resistance will be crucial to preserving these new materials as organophosphate uses are lost.


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Zalom F, Toscano N, Byrne F. 2005. Managing resistance is critical to future use of pyrethroids and neonicotinoids. Hilgardia 59(1):11-15. DOI:10.3733/ca.v059n01p11
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