Latent Effect of Certain Ovicidal Compounds LC50 on Some Biological and Biochemical Parameters of Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)

Document Type : Original Article

Authors

1 Economic Entomology and Agricultural Zoology Department, Faculty of Agriculture, Menoufia University, Egypt.

2 Plant Protection Research Institute, Agric. Res. Center, Dokki,Giza, Egypt

Abstract

Latent effect of LC50 of Growth Regulators (IGR’s)(Teflubenzuron, Lufenuron, and Flufenoxuron ) against pink bollworm Pectinophora gossypiella (Saund.) under laboratory conditions was studied. Tested compounds were evaluated against one-day-old eggs of P. gossypiella. LC50s were 33.17, 18.65, and 14.36 mg/liter, for Teflubenzuron, Lufenuron, and Flufenoxuron, respectively. The biological effect of these compounds on larvae, pupae, and adult emergence resulted from treated eggs was studied. The obtained results showed prolongation in development periods of larval and pupal stages resulted from treated eggs compared with control. Results indicated prolongation in adult females and males’ longevities, there was also a significant reduction in the number of eggs laid by each female and percentages of hatchability of these eggs compared with control. The latent effect of these compounds on some biochemical parameters in larvae resulted from treated eggs was analyzed for total protein, Free-amino acid,   chitinase activity, N-acetyl- glucosamine and Phenoloxidase activity. The results showed significant reduction in all biochemical parameters but chitinase was significantly high compared with control. In general, the tested compounds had latent significant biological and biochemical effects on the pink boll worm.

Keywords

Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control
Volume 11, Issue 3
December 2019
Pages 171-180

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