Madras Agricultural Journal
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Effect of Two Organophosphorus Insecticides on Survival of Azotobacter chroococcum Beij. in Soil and their Degradation in vitro

Abstract

The insecticides Disyston (disulfoton) and Dasanit (fensulfothion) at the normal (5 ppm) and the higher (10 ppm) concentrations adversely affected the survival of Azotobacter cells inoculated into soil for 20 days but the population built up thereafter However, the subnormal (2 ppm) level of the insecticides showed no significant effect on the survival of the organism in the soil. The organism degraded the insecticides in vitro in a short period and also utilised them as the sole nutrient scurce.

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