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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,*

 

1Department of Zoology, University of the Punjab, Quaid-i-Azam Campus, Lahore
2Faculty of Life Sciences, University of Central Punjab, Lahore

*      Corresponding author: farah.shakoori@yahoo.com

 

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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Pakistan Journal of Zoology

June

Vol. 50, Iss. 3, Pages 799-1198

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