Comparative Toxic Effects of Methamidophos and Cypermethrin on Cholinesterase Enzyme of Callosobruchus analis

Comparative Toxic Effects of Methamidophos and Cypermethrin on Cholinesterase Enzyme of Callosobruchus analis

Nighat Gul, M. Farhanullah Khan, Afaq Ahmad Siddiqui and M. Arshad Azmi

http://dx.doi.org/10.6000/1927-5129.2012.08.02.27

Abstract: In the present study the cholinesterase inhibition was observed as 65% and 12, for methamidophos and cypermethrin, respectively. LC50 values were found as 16 and 2.2, µg/cm2 for methamidophos, cypermethrin, respectively against Callosobruchus analis by the filter paper impregnation method after 24 hours of treatment. The order of efficacy was found as cypermethrin > methamidophos.

Keywords: Toxicity, Cholinesterase, Callosobruchus analis, Methamidophos and Cypermethrin