Effect of Turfgrass on Soil Mobility and Dissipation of Cyproconazole

摘要: Previous studies of pesticide fate in turfgrass have found less mobility and more rapid dissipation compared with using the same applied to bare soil. Few direct comparisons vs. soil been conducted. The persistence cyproconazole [α-(4-chlorophenyl)-α-(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol] on (Flanagan silt loam; fine, smectitic, mesic Aquertic, Argiudoll) turf containing varying levels organic matter was examined under field conditions. Twenty-centimeter-diameter polyvinyl chloride (PVC) cylinders were installed either creeping bentgrass (Agrostis palustris Huds.), or where 33, 67, 100% thatch plant material had removed. Cyproconazole at 403 g a.i. ha ' 15 July 1996 8 1997. Replicate sampling removed 2 h after treatment (HAT) 4, 8, 16, 32, 64, 128 d (DAT). Cylinder cores sectioned into depths assayed for by gas chromatography, On all days, increasing amount surface decreased 0- 1-, 1- 3-, 3- 5-, 5- 15-cm core sections. detected a full stand 4 32 DAT 1 11%, respectively, that residues never exceeded 20 μg kg 15- 30-cm section any treatment. half-life from 129 12 turf. movement below 5 cm reduced amounts thatch, as little one-third greatly cyproconazole. Application results than is typically reported other agronomic crops.