Pesticides Liability For Enzymatic Activity Variance In Field Pink Boll Worm, Pectinophora gossypiella (Saunders)

Document Type : Original Article

Authors

1 Department of Zoology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

2 Agricultural Research Center- Central Agricultural Pesticides Lab- Dokki-Giza-Egypt

Abstract

Toxic influence of Chlorpyrifos, Lambda-Cyhalothrin, Methomyl and Spinosad against lab and field moths of the pink bollworm, Pectinophora gossypiella (Saund.) were tested under Laboratory conditions. Methomyl had the superior toxic effect followed by Lambda-Cyhalothrin, Chlorpyrifos and Spinosad (LC50 = 1.16, 2.45, 4.01 and 20.75 ppm respectively) to Lab insects. The field insects from Menoufia Governorate were more tolerant to toxic effect of the tested insecticides especially chlorpyrifos than Bani-Suif Governorate insects. A high significant increase of enzyme activity was determined in Glutathione-S-Transferase (GST) than MFO Cytochrome P450 (PCMAN-demethylase) of Field moths than lab ones. While the depletion in enzyme activity was presented in Acetylcholinesterase enzyme of field insects. These changes in enzymes activity of the field insects may be correlated with their tolerance ability to toxic effect of the tested insecticides.

Keywords

Egyptian Academic Journal of Biological Sciences. A, Entomology
Volume 10, Issue 6
October 2017
Pages 167-177

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