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Runoff of Two Sulfonylurea Herbicides in Relation to Tillage System and Rainfall Intensity by M. M. Afyuni; M. G. Wagger; R. B. Leidy is a Environmental Science article available to read on EtoBox.

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The use of sulfonylurea herbicides is increasing because they are used at very low rates and offer greater weed management flexibility in pre-and postemergence programs. Information is needed on the off-site movement of these compounds under different tillage systems. ## Our objective was to evaluate the runoff potential of chlorimuron ethyl {(2-[[[[(4-chloro-6-methoxy-pyrimidin-2-yI) amino]carbonyl]aminojsulfonyl] benzoic acid)}, nicosulfuron {(2[[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl]aminosulfonyl]-JV, JV-dimethyl-3-pyridinecarboxamide)), and bromide in conventional (CT) and no-tillage (NT) production systems under simulated rainfall. The soil types were a Norfolk sandy loam (fine-loamy, siliceous, thermic Typic Paleudult) at a Coastal Plain location and a Pacolet sandy clay loam (clayey, kaolinitic, thermic Typic Kanhapludult) at a Piedmont location. The first simulated rainfall event (30 min) consisted of a low (1.27 cm h ') or high (5.08 cm h ') rate applied 24 h after herbicide and bromide application. One week later, the high rainfall rate was repeated on all plots. Consistently greater runoff occurred with CT compared to NT. Runoff differences between tillage systems

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Author

M. M. Afyuni; M. G. Wagger; R. B. Leidy

Publisher

The American Society of Agronomy; American Society of Agronomy; American Society of Agronomy, Inc.; Wiley (ISSN 0047-2425)

Published

1997

Language

EN

Field

Environmental Science (Physical Sciences)