期刊
JOURNAL OF ECONOMIC ENTOMOLOGY
卷 111, 期 3, 页码 1096-1103出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/jee/toy055
关键词
biological control; reduced-risk insecticide; sublethal effects; spinosyn
类别
资金
- National Council of Scientific and Technological Development (CNPq) [301847/2015-0, 202825/2015-9]
- CAPES Foundation (PROEX)
- Minas Gerais State Foundation for Research Aid (FAPEMIG)
- Natural Sciences and Engineering Research Council of Canada [RGPIN-2015-04639]
Insecticides can affect biological control by parasitoids. Here, we examined the lethal and sublethal effects of two conventional insecticides, imidacloprid and lambda-cyhalothrin, and a reduced-risk bioinsecticide, spinosad, on the aphid parasitoid Aphidius colemani Viereck (Hymenoptera: Braconidae). Concentration-mortality curves generated from insecticide residue bioassays found that wasps were nearly 20-fold more susceptible to spinosad than imidacloprid and lambda-cyhalothrin. lmidacloprid and lambda-cyhalothrin compromised adult parasitoid longevity, but not as dramatically as spinosad: concentrations >200 ng spinosad/cm(2) reduced wasp longevity by half. lmidacloprid and lambda-cyhalothrin also compromised aphid parasitism by wasps. Although increasing imidacloprid concentrations led to increased host viability and reduced progeny production, lambdacyhalothrin did not affect viability of parasitized hosts or parasitoid progeny production in a dose-dependent manner. Our results demonstrate that reduced risk bioinsecticide products like spinosad can be more toxic to biological control agents than certain conventional insecticides.
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