Possible mechanisms of organophosphorus resistance in field strains of cotton leafworm, Spodoptera littoralis (boisd.)

Authors

Plant Protection Dept., Fac. of Agriculture, Tanta Univ., Kafr El-Sheikh, Egypt

10.21608/jpces.1990.460700

Abstract

Comparative biochemical and toxicological studies of Spodoptera littoralis (Boisd.) to the organophosphorus (OP) insecticides were made to detect any changes that might be linked to the development of resistance. The resistant cotton leafworm which originated from the field colonies of Kafr El-Sheikh (KF) & Sharkia (SH) governorate had greatly elevated levels of lipids, non-specific esterases, acid-and alkaline phosphatases than the susceptible strain. On the other hand, acetylcholinesterase activity was significantly lower in resistant larvae and less sensitive to in vitro inhibition with OP insecticides than that of the susceptible strain.
Journal of Pest Control and Environmental Sciences
Volume 2, Issue 1
1990
Pages 179-187

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