EFFECT OF ORGANOPHOSPHATE PESTICIDES ON PHOSPHATASE ACTIVITY OF ASPERGILLUS AWAMORI KC316117 ISOLATED FROM SIMILIPAL BIOSPHERE RESERVE SOILSANTANU K. JENA, KUMANANDA TAYUNG AND CHANDI C. RATHAbstract Five organophosphate pesticides (Chlorpyriphos, Dimethoate, Monocrotophos, Trozophos and Profenofos) were used in this investigation to find out the effect on phosphate solubilising activity of the fungus Aspergillus awamori KC316117 isolated from Similipal Biosphere Reserve soil. The pesticides, Chlorpyriphos inhibited the growth and phosphatase activity at low concentration (0.02%). Surprisingly, Dimethoate (0.015%-0.06%) in the medium inhibited phosphates activity but did not affect growth of the fungus. Monocrotophos was found to have less effect on enzyme production. On the other hand, Trizophos and Profenofos were found to be moderately effective on the production of phosphatase and growth of the test fungus.
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