Ecology, Environment and Conservation Paper

EVALUATION OF SOME ADJUVANTS FOR UVC RAYS PROTECTABILITY FOR BEAUVERIA BASSIANA (BALSAMO) VUILLEMIN

R. S. Jadhav, J. R. Kadam, N. S. Ukey, S. D. Patil and D. R. Kadam

Abstract

The effect of UVC rays on biomass development of Beauveria bassiana (Balsamo) Vuillemin combination with chemicals, vegetable oils and other substrates as adjuvants were evaluated by exposing the combination for 10 to 50 minutes and 2, 3 and 5 hours under laboratory conditions. It was established that the biomass produced by B. bassiana with or without adjuvants in culture medium after exposure to UVC rays decreased with increase in the exposure periods. After 5 hrs UVC rays exposure, the treatment with adjuvant sunflower oil 1.0 per cent maintained its superiority over rest of the treatments and developing highest (6.13 g) biomass/ 40 mL medium of B. bassiana fungal mat. It was at par with sunflower oil 0.5 % (6.07 g). The next effective treatments for the UVC protectability reflecting in fungal biomass production were groundnut oil 1.0 % (5.70 g) and 0.5 % (5.63 g). Treatment with Tween 80 0.5 % (2.63 g), molasses 2.0 % (3.13 g) and Tween 80 1.0 % (zero g) consistently proved to be inefficient for UVC rays protectability for B. bassiana. As adjuvants vegatableoils, ghee and indigo 0.5 % and 1% gave considerable protection to B. bassiana from the UVC rays producing the biomass 4.47 to 6.13 g against 6.20 g and 2.92 g biomass development in the unexposed and exposed control, respectively.