Effect of Temperature on the Degradation of Fipronil in Soil

Effect of temperature on the degradation of fipronil was studied in two different soils i.e. in a sandy loam and organic matter rich soil. Increasing the temperature from 4°C to 30°C fipronil degradation was accelerated to a great extent which was more pronounced when soil moisture level was increased. Under 20% field capacity moisture (FCM) half-life of fipronil reduced from nearly 3 months to 43 days with concomitant increase in temperature from 4°C to 30°C. Under submerge condition with increase in temperature from 4°C to 30°C, the half-life was reduced from 61.5 - 90.13 days to about 1 week in both the soils. Soil characteristics did not have any significant effect on fipronil degradation.