Pesticide>> Fungicides >>Chlorsulfuron

Description: ISO 1750 (approved)
IUPAC: 1-(2-chlorophenylsulfonyl)-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea
CAS: 64902-72-3
Formula: C12H12ClN5O4S
Activity: herbicides (triazinylsulfonylurea herbicides)

Structure:

Chlorsulfuron APPLICATIONS
Biochemistry Branched chain amino acid synthesis (ALS or AHAS) inhibitor. Acts by inhibiting biosynthesis of the essential amino acids valine and isoleucine, hence stopping cell division and plant growth. Selectivity derives from rapid metabolism in the crop. Metabolic basis of selectivity in sulfonylureas reviewed (M. K. Koeppe & H. M. Brown, Agro-Food-Industry, 6, 9-14 (1995)). Mode of action Selective systemic herbicide, absorbed by the foliage and roots, with rapid translocation acropetally and basipetally. Uses Control of most broad-leaved weeds and some annual grasses in wheat, barley, oats, rye, triticale, flax, and on non-crop land. Applied pre-emergence, early post-emergence, pre-plant, or early post-plant incorporated, at 9-25 g/ha. Phytotoxicity Phytotoxic to many broad-leaved crops, particularly sugar beet and brassicas. Formulation types WG.

ANALYSIS
Product analysis by hplc (R. V. Slates & M. W. Watson, Anal. Methods Pestic. Plant Growth Regul., 1988, 16, 53). Residues determined by hplc (idem, ibid.; E. W. Zahnow, J. Agric. Food Chem., 1982, 30, 854) and by immunoassay (Kelly et al., ibid., 1985, 33, 962).

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