Synergistic composition and method of selective weed control

Details Synergistic composition and method of selective weed control Synergistic composition and method of selective weed control

A - Human Necessities

01

N

A01N 47/36 (2006.01)

Patent

CA 2050653

Case PH/5-18237/A Abstract Synergistic composition and method of selective weed control The present invention relates to a synergistic composition comprising a herbicidally active sulfonylurea of formu1a I Image , wherein Z is a substituted phenyl, thiophenyl, benzyl, pyridinyl, pyrazinyl, hetero-fused phenyl, or alkylsulfonylamino radical; M is hydrogen; or C1-C4alkyl; and Het is a substituted five- or six-membered heterocycle having 2 or 3 nitrogen atoms, and a synergistically effective amount of a 5,6,7,8-tetrahydro-1H,3H-(1,3,4)-thiadiazolo[3,4-a]- pyridazine or 7,8-dihydro-1H,3H-(1,3,4)-thiadiazolo[3,4-a]pyridazine of formula II Image (II), wherein X is oxygen; or sulfur, A-B is -CH2-CH2-; or-CH=CH-; and Phe is a substituted phenyl radical. The composition according to the invention is suitable for selective weed control in crops of useful plants, especially in cereals, maize, rice or soybeans. The invention relates also to a method of controlling weeds in crops of useful plants, especially in cereals, maize, rice or soybeans, and to the use of the novel composition.

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