THE BIO-EFFECT OF NPV VIRUS, DELTAMETHRIN AND THEIR BINARY MIXTURE ON SOME BIOLOGICAL FEATURES OF THE COTTON LEAFWORM Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)

Document Type : Original Article

Author

Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

Abstract

The present work was carried out under laboratory conditions in order to evaluate resistance building up of a cotton leafworm Spodopte­ra littoralis (Boisd.) laboratory susceptible strain to commercial formula­tions of Deltamethrin, Nuclear Polyhedrosis Virus and their binary mix­tures as indicated by certain biological aspects. The obtained results showed that no resistance have been achieved after 8 successive generations for the three tested treatments. The three formulations displayed latent effect which took place during the larval stages up to moth emergence. The data reveals that larval du­ration, pupal duration, pupal weight, adult longevity, mortality rates, sex ratio and reproductive potentiality were strongly affected. The simulta­neous effect of these tested formulations was greatly governed; the bi­nary mixture demonstrated mild effect in this respect.

Files

Share

How to cite

Statistics