COMPARATIVE STUDIES FOR USING CERTAIN BAITS AS NATURAL CONTROL AGENT AGAINST AGROTIS YPSILON, (LEPIDOPTERA) UNDER LABORATORY AND FIELD CONDITIONS

Quick lime and two other biological control agents: Bacillus thuringiensis, Metarhisium anisopliae and hostathion [triazophos] were used as poisonous pelleted semi-hard cake baits formulations contains of insecticide, sugar cane molasses and wheat brain (2: 1: 4) against the fourth instar larvae of Agrotis ypsilon. in the laboratory and the field. Quick lime was used at 1, 1.2and 1.3 kg, B. thuringiensis at 1x103, 1.5x103 and 1.75x103 spores/ ml and Metarhisium anisopliae at 1x107, 1.5x107 and 1.75x107 spores/ ml and hostathion insecticide at1, 1.5and1.75L. Double concentrations of one of the tested materials, the quick lime, bacterium, fungus and hostathion were used under field conditions. Fourth instar larvae of cut worm insect were allowed to feed on the plants treated with mixture of one of each of quick lime, microbium fungus, and hesitation and in the freely consumption (persistency) with Lc50 of one of each material without plants in the laboratory in the field for 2, 4 and 6 days. Lower amout of hostathion and quick lime semi-hard cake were consumed compared with the other biological control agents and achieved higher mortality. B. thuringiensis and M. anisopliae semi-hard cake achieved moderate mortality within plants or in the freely consumptions.