Impact of some bio-insecticides on certain biological aspects of pulvinaria tenuivalvata [newstead] [fam.: Coccidae, order: Homoptera] infesting sugar-cane

ABSTRACT

The red-striped soft scale insect, [R.S.S.S] Pulvinaria tenuivalvata attacking sugar-cane at Attfieh region, Giza Governorate is recently considered an important economic insect pest of sugar-cane in Egypt. Laboratory evaluation of different extracts of the spicked centaury, Centaurium spicatum on the biological aspects of P. tenuivalvata was studied. Petroleum ether extract proved the most effective extract on all insect stages. The impact of the most effective extract, mineral oil, and biocide on the biological aspects of P. tenuivalvata under laboratory and field conditions was studied. The tested compounds are effective against soft scale insect, P. tenuivalvata on sugar-cane leaves and they increased sugar-cane yield significantly, at Attfieh region