Efficiency of the Fungi Baeuveria Bassiana, Lecanicillum Muscarium, Metarhizium Acridum, ISARIA Fumorovosea to Control the Lace Bug

Abstract

The laboratory study was conducted in the laboratories of the Department of Plant Protection / Integrated Management of Production and Plant Protection projects. The study aimed to determine and the effectiveness of some biological factors (pathogenic fungi) on the nymphs and adults of the Stephanitis Pyri (Fabricius). The results of the study showed the variation in the rates of killing of fungi on the different stages of the insect S. pyri, as its nymphs were affected for a shorter period of time than the adults. The Metarhizium acridum at a concentration of 1 x 710 spores/ml was superior in its effect on nymphs, so the killing rate was 100%, While the killing rate of Beauveria bassiana was 93.8%, while that of Isaria fumosorosea was 87.5%, and the fungus Lecanicillum muscarium had a killing rate of 75%, with the same concentration as before. As for its effect on the adult role at the same concentration and time period, the killing rate was 70.6, 64.7, 52.9 and 58.8%, respectively, for the mentioned preparations.