Civil Engineering Department, Kansas State University, Manhattan, KS, 66506, 913-532-1583
Pesticides are applied to grasses on golf courses, home lawns, sports complexes, industrial parks and other areas to improve turf quality. Current public concern has focused attention on the environmental effects of chemical applications to turfgrass areas. The objective of this research was to investigate the fate of pendimethalin, chlorpyrifos, isazofos and metalaxyl when applied to a Kentucky bluegrass turf established on 50 cm undisturbed soil columns. The macropore system in the soil remained intact. This study was conducted using a heavy and a light irrigation regime. The heavy irrigation regime consisted of four 2.54 cm applications spread over the four week test period. The light irrigation regime consisted of sixteen 0.63 cm applications spread over the four week test period. The author conducted this research while in graduate school at Iowa State University. Average isazofos, chlorpyrifos, metalaxyl and pendimethalin recovery from soil columns under the heavy irrigation regime, plus that collected in the leachate, averaged 8.8,11.5, 23.8 and 7.9%, respectively. Isazofos, chlorpyrifos, metalaxyl and pendimethalin recovery from soil columns under the light irrigation regime, plus that collected in the leachate, averaged 3.4, 6.6, 13.9 and 4.6%, respectively. On average 6.3, 0.5, 7.7 and 0.2% of the applied isazofos, chlorpyrifos, metalaxyl and pendimethalin, respectively, were found in leachate from undisturbed soil columns under the heavy irrigation in contrast to 0.4, 0.0, 0.2 and 0.0% from undisturbed soil columns under the light irrigation. From this research, it was concluded that irrigation practices can have an impact on the movement of pesticides through soil profiles.
environment, urban, insecticide, herbicide, fungicide
This paper is from the Proceedings of the 10th Annual Conference on Hazardous Waste Research 1995, published in hard copy and on the Web by the Great Plains/Rocky Mountain Hazardous Substance Research Center.