Effect of Teflubenzeron and Lufenuron on Some Biological Aspects of Chrysopela carnea (Stephens) Immature Stages

Document Type : Original Article

Authors

1 Economic Entomology& Agricultural Zoology Dept., Faculty of Agriculture, Menoufia University, Egypt.

2 Plant Protection Department, Faculty of Agriculture, Tanta University, Egypt

Abstract

Biological and biochemical effects of LC50 of Growth Regulators (IGR’s) Teflubenzuron and Lufenuron were studied against green Chrysopella carmea (Stephens) under laboratory conditions. Tested compounds were evaluated against fresh first instars by contact and feeding techniques on Corcyra cephalonica egg. LC50s were 43.17 and 28.65 ppm, by contact technique for Teflubenzuron, and Lufenuron, respectively, but when the feeding technique was applied, the LC50s were 31.22 and 16.71 ppm for Teflubenzuron, and Lufenuron, respectively. The biological effects of these compounds were studied on larval and pupal periods which resulted from treated first instar. The obtained results showed prolongation in developmental periods of larval and pupal stages compared with control. The latent effect of these compounds on some biochemical parameters in second instar larvae resulted from treated fresh first instar larvae were analyzed for Phenoloxidase activity, total protein, N-acetyl- glucosamine significance, and chitinase activity. The results showed a significant reduction in all biochemical parameters but chitinase was significantly high compared with control. In general, the tested compounds had significant biological and biochemical effects on immature stages of C. carnea.

Keywords

Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control
Volume 13, Issue 2
December 2021
Pages 209-216

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