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Report
Impact of insecticides on the spider mite destroyer and twospotted spider mite on red raspberries in Washington
Research bulletin (Washington State University. College of Agriculture and Home Economics. Research Center), 1034, Washington State University, College of Agriculture and Home Economics, Research Center
09/1996
Handle:
https://hdl.handle.net/2376/7221
Abstract
The effect of insecticide sprays on numbers of the spider mite destroyer, Stethorus punctum picipes Casey and twospotted spider mites, Tetranychus urticae Koch, in red raspberry fields was studied. Two sprays of malathion had no effect on numbers of Stethorus captured in trap-colonies of spider mites. In contrast, bifenthrin and permethrin applied to raspberry fields destroyed the Stethorus populations and were associated with rapid increases in spider mite numbers. In a field treated with permethrin, Stethorus reappeared after 67 weeks, rapidly increased in numbers, and the spider mite population quickly decreased to virtually zero. Another commercial red raspberry field had large numbers of spider mites in 1987 and 1988 when many synthetic insecticides were used. No such chemicals have been applied since 1988. From 19891992 the mite population was near zero and S. p. picipes was found frequently on leaves and in trap colonies. Thus, Stethorus appeared to control mites.
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Details
- Title
- Impact of insecticides on the spider mite destroyer and twospotted spider mite on red raspberries in Washington
- Creators
- Arthur L. Antonelli (Author)Carl H. Shanks (Author)Bruce D. Congdon (Author)
- Academic Unit
- Publications, WSU Extension
- Series
- Research bulletin (Washington State University. College of Agriculture and Home Economics. Research Center); 1034
- Publisher
- Washington State University, College of Agriculture and Home Economics, Research Center; Pullman, Washington
- Number of pages
- 9
- Grant note
- This research was partially funded by a grant from the Washington Red Raspberry Commission. Research was conducted under Project No. 1957, Washington State University, College of Agriculture and Home Economic Research Center, Pullman, WA 99164-6240.
- Identifiers
- 99900501861301842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Report