Effect of Turfgrass on Soil Mobility and Dissipation of Several Pesticides
type: CreativeWork
description: The mobility and dissipation of several pesticides applied to turfgrass and bare soil was studied under field conditions. Cyproconazole [alpha-(4-chlorophenyl)-alpha-(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol] was applied to bare soil (Flanagan silt loam) and creeping bentgrass (Agrostis palustris Huds.) turf containing varying levels of organic matter at 403 g ai ha--1. Ethofumesate [(+/-)-2-ethoxy-2,3-dihydro-3,3- dimethylbenzofuran-5-yl methansulfonate] was applied to bentgrass and bare soil at 840 g ai ha--1. Halofenozide (N-4-chlorobenzoyl- N'-benzoyl-N' -tert-butylhydrazine) was applied to bentgrass, tall fescue ( Festuca arundinacea Schreb.), and bare soil at 1680 g ai ha --1. Mefanoxam [(R)-2-(2,6-dimethylphenyl)-methoxyacetylamino]-propionic acid methyl ester] and propiconazole (1-[[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]methyl]-1 H-1,2,4-triazole) were applied to bentgrass and bare soil under different irrigation schedules at 770 g ai ha--1 and 1540 g ai ha --1, respectively. Sampling cylinders were installed prior to treatment and then removed two hours after treatment and 4, 8, 16, 32, and 64 days after treatment (DAT) and the cores sectioned into depths. Extracts were assayed by HPLC or gas chromatography yielding pesticide detection limits of 0.01 to 0.04 mg kg--1. Cyproconazole leaching in turfgrass at 4 and 32 DAT was 1% and 11%, respectively, of that in bare soil. The half-life (t1/2) was 129 days in bare soil and 12 days in bentgrass. Ethofumesate leaching in bentgrass was reduced by at least 95% compared to bare soil and the t1/2 was 51 days in bare soil and 3 days in bentgrass. Leaching of halofenozide in turfgrass and bare soil were similar 32 and 64 DAT and the t1/2 exceeded 64 days. The t1/2 of mefanoxam was 5--6 days in turf and 7--8 days in bare soil and residues were found in the 15--30 cm soil layer at 4, 8, 16, 32, and 64 DAT, regardless of surface organic matter. Little propiconazole leaching was observed and the t1/2 wa…
abstract: The mobility and dissipation of several pesticides applied to turfgrass and bare soil was studied under field conditions. Cyproconazole [alpha-(4-chlorophenyl)-alpha-(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol] was applied to bare soil (Flanagan silt loam) and creeping bentgrass (Agrostis palustris Huds.) turf containing varying levels of organic matter at 403 g ai ha--1. Ethofumesate [(+/-)-2-ethoxy-2,3-dihydro-3,3- dimethylbenzofuran-5-yl methansulfonate] was applied to bentgrass and bare soil at 840 g ai ha--1. Halofenozide (N-4-chlorobenzoyl- N'-benzoyl-N' -tert-butylhydrazine) was applied to bentgrass, tall fescue ( Festuca arundinacea Schreb.), and bare soil at 1680 g ai ha --1. Mefanoxam [(R)-2-(2,6-dimethylphenyl)-methoxyacetylamino]-propionic acid methyl ester] and propiconazole (1-[[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]methyl]-1 H-1,2,4-triazole) were applied to bentgrass and bare soil under different irrigation schedules at 770 g ai ha--1 and 1540 g ai ha --1, respectively. Sampling cylinders were installed prior to treatment and then removed two hours after treatment and 4, 8, 16, 32, and 64 days after treatment (DAT) and the cores sectioned into depths. Extracts were assayed by HPLC or gas chromatography yielding pesticide detection limits of 0.01 to 0.04 mg kg--1. Cyproconazole leaching in turfgrass at 4 and 32 DAT was 1% and 11%, respectively, of that in bare soil. The half-life (t1/2) was 129 days in bare soil and 12 days in bentgrass. Ethofumesate leaching in bentgrass was reduced by at least 95% compared to bare soil and the t1/2 was 51 days in bare soil and 3 days in bentgrass. Leaching of halofenozide in turfgrass and bare soil were similar 32 and 64 DAT and the t1/2 exceeded 64 days. The t1/2 of mefanoxam was 5--6 days in turf and 7--8 days in bare soil and residues were found in the 15--30 cm soil layer at 4, 8, 16, 32, and 64 DAT, regardless of surface organic matter. Little propiconazole leaching was observed and the t1/2 wa…
author: Gardner, David Sean
language: eng
keywords: Agriculture, Soil Science
date published: 2015-09-28T16:59:30Z
date modified: 2026-07-22T22:26:31Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/87833