Pesticide>> Herbicides >>Diuron

Description: ISO 1750 (published)
IUPAC: 3-(3,4-dichlorophenyl)-1,1-dimethylurea
CAS: 330-54-1
Formula: C9H10Cl2N2O
Activity: herbicides (phenylurea herbicides)
Notes: The name “dichlorfenidim” was used in the former USSR.

Structure:

Diuron APPLICATIONS
Biochemistry Photosynthetic electron transport inhibitor at the photosystem II receptor site. Mode of action Systemic herbicide, absorbed principally by the roots, with translocation acropetally in the xylem. Uses Total control of weeds and mosses on non-crop areas, at 10-30 kg a.i./ha. Selective control of germinating grass and broad-leaved weeds in many crops, including asparagus, tree fruit, bush fruit, citrus fruit, vines, olives, pineapples, bananas, sugar cane, cotton, peppermint, alfalfa, forage legumes, cereals, maize, sorghum, and perennial grass-seed crops, at 0.6-4.8 kg/ha. Phytotoxic residues in soil disappear within 1 season at these lower rates.

Diuron ANALYSIS
Product analysis by hplc (G. W. Sheehan, Anal. Methods Pestic. Plant Growth Regul., 1984, 13, 227), or by hydrolysis and titration of the amine liberated (CIPAC Handbook, 1980, 1A, 1251), details available from Du Pont. Impurities by tlc (ibid., 1994, F, 336). Residues determined by glc (Anal. Methods Pestic. Plant Growth Regul., 1972, 6, 664; W. E. Bleidner, J. Agric. Food Chem., 1954, 2, 682). Hydrolysis to 3,4-dichloroaniline, a derivative of which is measured colorimetrically, may also be used (H. L. Pease, ibid., 1962, 10, 279; R. L. Dalton & H. L. Pease, J. Assoc. Off. Anal. Chem., 1962, 45, 377). In water, by lc with u.v. detection (AOAC Methods, 1995, 992.14, 10.7.01).

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