Deltamethrin Induced Changes in the Activities of Various Esterases in Deltamethrin-Resistant Populations of Trogoderma granarium
Deltamethrin Induced Changes in the Activities of Various Esterases in Deltamethrin-Resistant Populations of Trogoderma granarium
Ambrina Hafiz1, Tanzeela Riaz2 and Farah Rauf Shakoori1,*
ABSTRACT
The present study was aimed to evaluate the toxic effects of deltamethrin on the level of various esterases in deltamethrin-resistant populations of Trogoderma granarium collected from some godowns of Punjab. The level of various esterases like total esterases, cholinesterase, acetylcholinesterase, arylesterase and carboxylesterase in 4th, 6th instar larvae and adult beetles of deltamethrin-resistant populations’ viz., Gujranwala, Okara and D.G. Khan was significantly increased as compared to susceptible population of T. granarium (population never exposed to any kind of insecticide/fumigant since 2001). Different developmental stages possessed different levels of esterase activities. Based on the level of activities the adult beetles were more susceptible to deltamethrin than 4th and 6th instar larvae. The increased level of esterases contributes towards resistance against pesticide in stored grain pests.
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August 2018
Vol. 50, Iss. 4, Pages 1199-1600
