Relationship of Insecticide Resistance to Carboxylesterases In Aphis gossypii (Homoptera: Aphididae) from Midsouth Cotton

Authors: O'BRIEN, P. J.; ABDEL-AAL, Y. A.; OTTEA, J. A.; GRAVES, J. B.

Source: Journal of Economic Entomology, Volume 85, Number 3, June 1992 , pp. 651-657(7)

Publisher: Entomological Society of America

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Laboratory assays were done to quantify proportions of phenotypes in laboratory colonies resistant to several classes of insecticides in the cotton aphid, Aphis gossypii Glover. Resistance to a carbamate (aldicarb), an organochlorine (endosulfan), an organophosphate (chlorpyrifos), and a pyrethroid (bifenthrin) was documented. Significant declines in numbers of individuals resistant to bifenthrin and endosulfan but not for chlorpyrifos occurred during a 5-mo interval after the first bioassays. Resistance ratios between clonal susceptible and resistant cotton aphid colonies for chlorpyrifos indicated a significant 4-fold difference in LCso estimates for the two colonies. Spectrophotometric analyses indicated Significantly higher carboxylesterase activity in resistant aphids compared with susceptible aphids. Results from isoelectric polyacrylamide focusing gel techniques also showed differences in carboxylesterases, both in differences in banding patterns and in expression of comigrating bands.

Document Type: Research Article

Publication date: June 1, 1992

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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