Ciba-Geigy Corporation

Willy Maurer

Marco Quadranti

Kurt Maag

Urs Hofer

The invention relates to a herbicidal composition containing as compound of formula I N-[2-(methoxycarbonyl)phenyl]sulfonyl-N'-(4,6-bis-difluoromethoxypyrimidin -2-yl)-urea together with a herbicide of formula III ##STR1## wherein the radicals R.sup.2 and R.sup.3 are as defined in the text, to a method for the selective control of weeds in crops of useful plants and to the use of these compositions for controlling weeds in crops of useful plants.

Synergistic composition and method for the selective control of weeds

The present invention relates to a synergistic composition comprising a herbicidally active gulfonylurea of formula I ##STR1## wherein Z is a substituted phenyl, thiophenyl, benzyl, pyridinyl, pyrazinyl, hetero-fused phenyl, or alkylsulfonylamino radical;

Synergistic composition comprising a sulfonylurea and a thiadiazolo[3,4-a]p

The invention provides a herbicidal composition for the post-emergence selective control of grasses and weeds in cereals, such as wheat and barley. The composition contains two active components, one of which is N-(3-trifluoromethyl-1,2,4-thiadiazolyl-5)-N'-methyl-N'-methoxy urea and the other is a dichloropyridyloxy-.alpha.-phenoxypropionic acid derivative of the formula ##STR1## The invention also provides a post-emergence method of selectively controlling grasses and weeds in crops of cereals, such as wheat and barley, which comprises the use of this composition. In particular wild oat species are selectively controlled.

Herbicidal compositions containing

The invention provides a herbicidal composition for the post-emergence selective control of grasses and weeds in cereals, such as wheat and barley. The composition contains two active components, one of which is N-(3-trifluoromethyl-1,2,4-thiadiazolyl-5)-N'-methyl-N'-methoxy urea and the other is a dichloropyridyloxy-.alpha.-phenoxypropionic acid derivative of the formula ##STR1## wherein X is oxygen or sulfur and R is hydrogen, a cation, a lower alkyl, alkenyl or alkynyl radical. The invention also provides a post-emergence method of selectively controlling grasses and weeds in crops of cereals, such as wheat and barley, which comprises the use of this composition. In particular wild oat species are selectively controlled.

Growing community of inventors

Riehen, Switzerland

Willy Maurer