ACUTE AND LATENT BIOINSECTICIDAL ACTIVITIES OF PRECOCENES (I AND II) ON DIFFERENT DEVELOPMENTAL STAGES OF THE BERSEEM GRASSHOPPER, EUPREPOCNEMIS PLORANS PLORANS CHARP. AND THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.)

ABDEL KERIM, IBRAHIM A. A.; AMIN, TAREK. R.

doi:10.21608/ejar.2002.304066

ACUTE AND LATENT BIOINSECTICIDAL ACTIVITIES OF PRECOCENES (I AND II) ON DIFFERENT DEVELOPMENTAL STAGES OF THE BERSEEM GRASSHOPPER, EUPREPOCNEMIS PLORANS PLORANS CHARP. AND THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.)

Document Type : Original Article

Authors

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

10.21608/ejar.2002.304066

Abstract

The aim of the this investigation was to study the bioinsecticidal activities of precocenes (I and II) on the berseem grasshopper, Euprepocnemis plorans plorans Charp. and the cotton leafworm, Spodoptera 1i:torahs (Boisd.). Scored percentages for mortalities and abnormalities, as well as, the shortened nymphal duration had occurred due to ecdysitropic effect. The complete sterility resulted from grasshopper treatment proved that the insects were as if chemically allatoectomized by precocene II. Biochemical assays on the latent stages for total protein, total cholesterol, integument chitin and whole body lipids content, in addition to some biochemical parameters indicated that precocenes can play a role as insecticides and/or chemosterilants.