Inhibition by insecticides of partially purified carboxylesterase from Aphis gossypii (Homoptera: Aphididae)

Ebenezer O. Owusu, Michio Horiike, Chisato Hirano

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)307-310
Number of pages4
JournalJournal of Economic Entomology
Volume89
Issue number2
DOIs
Publication statusPublished - Apr 1996
Externally publishedYes

Keywords

  • Aphis gassypii
  • carboxylesterase
  • inhibition

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