INFLUENCE OF DIFFERENT CONSTANT TEMPERATURE DEGREES AND HOST PLANTS ON CERTAIN BIOLOGICAL ASPECTS OF THE MELON LADYBIRD BEETLE Epilachna chrysomelina (F.) (COLEOPTERA: COCCINELLIDAE)

Abstract

Laboratory experiments were carried out in the insectory of Economic Entomology Department,Faculty of Agriculture, Mansoura University, under three constant temperature 24±1, 28±1and 32±1 º C and 60.0±5% R.H. The total duration of the immature stages were the shortest (28.3± 2.7 days) when the insect pest reared under constant temperature of 32±1 º C followed by (37.4 ± 2.6 days) at 28 ±1 º C and the longest period was recorded at 24± 1 º