Abstract
A 1.0-ha cotton field in Nantong city (Jiangsu province, P.R.C.) was selected to monitor the movement and fate of aldicarb residues in soil and to check whether it will pollute the ground-water. The field measurement results showed that > 90% of the total aldicarb applied had been dissipated within 60 days and no detectable level of aldicarb residues was found in any of the soil profiles 120 days after the aldicarb was applied. The maximum leaching depth of aldicarb in soil was 0.60 m. None of the 20 observation wells in and around the study site had any detectable aldicarb residues during the entire experimental period. The PRZM model was used to simulate the movement of aldicarb in soil using the input data including soil properties, meteorological data and agriculture practices at the study site. Results predicted by the PRZM model agreed fairly well with those of the field measurements. Under the conditions of this experiment, the application of aldicarb to the cotton fields did not result in groundwater contamination. The results suggest that the PRZM model can be used to estimate the possibility of aldicarb leaching into groundwater and its effects on groundwater in other areas of China that have similar soil properties.
Published Version
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