Abstract
Inhibition of partially purified carboxylesterase from a dichlorvos selected (E-D-R) strain of cotton apbid, Aphis gossypii (Clover), by selected insecticides was demonstrated in vitro. Regeneration of active enzymes was not observed up to 5 h after removal of excess inhibitor. This result indicates that pesticides hydrolysis is not a likely resistance mechanism in A. gossypii. Carboxylesterases from this aphid seem likely to bind permanently to inhibitors, rendering them ineffective and thus protecting the active sites of pesticide inhibition. Of 2 organophosphate and 2 carbamate insecticides tested, dichlorvos was most inhibitory. The order of toxicity ranked dichlorvos > naled > carbaryl > m-tolyl carbamate.
Original language | English |
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Pages (from-to) | 307-310 |
Number of pages | 4 |
Journal | Journal of Economic Entomology |
Volume | 89 |
Issue number | 2 |
DOIs | |
Publication status | Published - Apr 1996 |
Externally published | Yes |
Keywords
- Aphis gassypii
- carboxylesterase
- inhibition