Relationsidp belween permellirin susceptibility and elevaled esterase in clones of cotton aphid (homoptera: aphididae)
1991
Owuso. E.O., ICRISAT Sahelian Center (lSC), B. P. J 2404, Niamey, Niger) | Adjei-Afrryie, F., Department of Resources Science, Kochi University, B.200 Monobe, Nankoku-shi, Kochi 783,Japan
Activities of some hydrolytic enzymes and their relationship to permethrin (a pyrethroid insecticide) susceptibility in the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae), were evaluated in vitro. All esterases studied, i.e. acetylcholinesterases, butyrylcholinesterases, carboxylesterases, and p-nitrophenyl acetate hydrolyzing esterases, exhibited to definite trend in relation to 50 per cent lethal concentration (LCso) values of permethrin. Thus, resistance to permethrin in cotton aphid is likely to be expressed through causes other than elevated esterase activities
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