Response of Wheat (Triticum aestivum) and Rotation Crops to Chlorsulfuron

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Abstract
Chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} at rates of 140 g ai/ha and lower did not reduce wheat (Triticum aestivum L. 'Stephens’) grain yield, but soil residues from 35 g/ha injured snap beans (Phaseolus vulgaris L.), alfalfa (Medicago sativa L. ‘DuPuits’), sweet corn (Zea mays L. ‘Jubilee’), Italian ryegrass (Lolium multiflorum Lam.), sugarbeets (Beta vulgaris L. ‘Giant Western’), and rape (Brassica napus L. ‘Dwarf Essex’). Chlorsulfuron at 35 g/ha reduced foliage weight of sugarbeets seeded 26 months after application. Phytotoxic levels of the herbicide were present 10 to 20 cm deep, 168 days after application to a silt loam soil. Chlorsulfuron reduced alfalfa petiole length and fresh weight in the greenhouse when mixed in soil at rates as low as 0.025 ppb (w/w).