Pesticide Dissipation under Golf Course Fairway Conditions

摘要: The degradation and vertical movement of pendimethalin, chlorpyrifos, isazofos, metalaxyl were monitored in Kentucky bluegrass (Poa pratensis L.) turf managed as a golf course fairway. Intact turf-soil cores from Mead, NE, on Sharpsburg soil (fine montmorillonitic, mesic Typic Argiudoll) Gilbert, IA, Nicollet loam (fine-loamy, mixed, Aquic Hapludoll) planted to periodically removed 60-cm depth through 113 d after pesticide application. Cores sectioned into verdure, thatch, multiple depths. While verdure contained high concentrations application, precipitation, clipping, reduced the amount plant tissue with time. Thatch was highly retentive pesticides, generally containing most residue throughout monitoring period. Pesticide residues tended be lower at Iowa site where more thatch present. Little chlorpyrifos or pendimethalin moved underlying soil. Isazofos mobile entire column. Soil an average 58% less than over all sampling times, highest 0- 5- 10-cm Average time for 50% dissipation profile (DT 50 ) 16, 12, 10, 7 metalaxyl, respectively. pesticides appeared degrade rapidly turfgrass environment typically reported other agronomic cropping systems. Variability each among indicated non-uniform field.