Field mobility of flumetsulam in three Mississippi soils
1997
Murphy, G.P. | Shaw, D.R.
Research was conducted in 1994 and 1995 to evaluate the field mobility of flumetsulam in three soils of varied texture and organic matter content but constant pH (pH = 6.0 +/- 0.1). Flumetsulam was monitored to a depth of 122 cm at 28, 56 and 84 days after treatment (DAT). Flumetsulam concentrations were determined by cotton bioassay, with separate standard curves for various soil-depth combinations. Following a preemergence application of flumetsulam at 224 g ai ha(-1), the herbicide was primarily limited to the upper 8 cm of soil, regardless of soil type, year, or DAT. Exceptions to this typically occurred following substantial rainfall amounts early in the season. Beyond 28 DAT; no significant concentrations of flumetsulam were detected below 15 cm. Results from this research suggest that leaching is not a significant route of flumetsulam dissipation in the field.
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