| Modeling evolution of resistance to pyriproxyfen by the sweetpotato whitefly (Homoptera: Aleyrodidae). | |
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MedLine Citation:
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PMID: 16937698 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We used computer simulations to examine evolution of resistance to the insect growth regulator (IGR) pyriproxyfen by the sweetpotato whitefly, Bemisia tabaci (Gennadius), biotype B [=Bemisia argentifolii (Bellows & Perring)]. Consistent with trends seen in cotton (Gossipyium spp.) fields in Arizona and Israel, results suggest that evolution of resistance to pyriproxyfen may occur rapidly in this haplodiploid insect. Similar to results from models of diploid insects, resistance evolved faster with increases in toxin concentration, dominance of resistance in females, the initial frequency of the resistance allele, and the proportion of the region treated with pyriproxyfen. Resistance was delayed by fitness costs associated with resistance. Movement between treated and untreated cotton fields had little effect, probably because untreated cotton leaves provided internal refuges in treated fields and whiteflies were controlled with other insecticides in external refuges. Resistance evolved faster when susceptibility to pyriproxyfen was greater in susceptible males than susceptible females. In contrast, resistance evolved slower when susceptibility to pyriproxyfen was greater in resistant males than resistant females. Results suggest that growers may be able to prolong the usefulness of pyriproxyfen by applying lower toxin concentrations and promoting susceptible populations in refuges. |
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Authors:
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David W Crowder; Yves Carrière; Bruce E Tabashnik; Peter C Ellsworth; Timothy J Dennehy |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of economic entomology Volume: 99 ISSN: 0022-0493 ISO Abbreviation: J. Econ. Entomol. Publication Date: 2006 Aug |
Date Detail:
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Created Date: 2006-08-29 Completed Date: 2006-10-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985127R Medline TA: J Econ Entomol Country: United States |
Other Details:
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Languages: eng Pagination: 1396-406 Citation Subset: IM |
Affiliation:
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Department of Entomology, University of Arizona, Tucson, AZ 85721, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Evolution Female Gene Frequency Genes, Dominant Gossypium / parasitology Hemiptera / genetics* Insecticide Resistance / genetics Insecticides Juvenile Hormones* Locomotion Male Models, Genetic Pyridines* Sex Ratio |
| Chemical | |
Reg. No./Substance:
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0/Insecticides; 0/Juvenile Hormones; 0/Pyridines; 95737-68-1/pyriproxyfen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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