Pesticide>> Herbicides >>Metsulfuron-methyl

Description:ISO 1750 (approved)
IUPAC: 2-(4-methoxy-6-methyl-1,3,5-triazin-2-ylcarbamoylsulfamoyl)benzoic acid
CAS: 79510-48-8
Formula: C13H13N5O6S
Activity: herbicides (triazinylsulfonylurea herbicides)
Notes: When this substance is used as an ester or a salt, its identity should be stated, for example metsulfuron-methyl [74223-64-6].

Structure:

Metsulfuron-methyl 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 through the roots and foliage, with rapid translocation both acropetally and basipetally. Susceptible plants cease growth almost immediately after post-emergence treatment, and are killed in 7-21 days. Surfactants increase the activity of metsulfuron-methyl on certain broad-leaved weeds.

Metsulfuron-methyl ANALYSIS
Product analysis by hplc (L. W. Hershberger & D. E. Brennan, Anal. Methods Pestic. Plant Growth Regul., 1988, 16, 83). Residues determined by hplc (idem, ibid.). Methods for sulfonylurea residues in crops, soil and water reviewed (A. C. Barefoot et al., Proc. Br. Crop Prot. Conf. - Weeds, 1995, 2, 707).

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