405DYNAMICS OF CATALASE IN THE HAEMOLYMPH OF SILKWORM BOMBYX MORI L. DURING THE PROGRESS OF FUNGAL PATHOGEN BEAUVERIA BASSIANA (BALS.) VUILLDecreased trend of catalase activity was recorded in haemolymph of both inoculated (3.56 to 1.36 units/mg protein/min) and control (3.95 to 1.94 units/mg protein/min) from 1st day to 6th day of the 5th instar silkworm larvae. However, Significant reduction of enzyme activity was noticed in the inoculated larvae compared to control. The results of the present study very clearly indicated the activity of catalase in haemolymph of the silkworm Bombyx mori and its relation to larval resistance.rajitha.keerthi@gmail.comResearch512014 Beauveria bassiana,Bombyx mori,Catalase,HaemolymphRajitha K,Savithri GDepartment of Sericulture, Sri Padmavati Mahila Visvavidyalayam, Tirupati-517502, Andhra Pradesh, India,Department of Sericulture, Sri Padmavati Mahila Visvavidyalayam, Tirupati-517502, Andhra Pradesh, India