| abstract |
The invention relates to chemical processes for controlling undesirable weeds and vegetation. The invention achieves an increased efficiency in combating undesirable vegetation due to the use of novel sulfonylurea derivatives of the general formula Ar-SO2NHC (Z) NH-R (1), wherein Ar represents (R1) n (XA) mC6H5 - (m + n); -4-R2-6-R3-pyrimidyl-2 or 4-R2-6-R3- represents H, F, Cl, Br, CH3, iso-C3H7, CH3O, NO2; R 2 represents C 1 -C 3 alkyl, C 1 -C 3 alkyloxy, CCl 3, C 3 H 7 O, Cl; R3 represents CH3, CH3O, C2H5O, iso-C3H7O, CL, group XA represents allyloxy, 2-methylalyloxy, 3,3-dimethylalallyloxy, 2-chloralyloxy, 2,3-dichloralyloxy, 1,2-dichlorvinyloxy, 1,2 -dichlorvinylthio, 2-butenyloxy, 2-methylthioethyloxy, 2-methylsulfinylethyloxy, 2-methylsulfonylethyloxy, methylthiethyloxy, difluoromethyloxy, diethyloxy, 2-fluoroethylthio, bromodifluoromethylthio, 2-bromo-difluoromethyl-2,3 , 2,3.dicporbutyloxy, 1,2,2-terafluoroethyloxy, 1,1,2,2, -tetrafluoroethylthio, difluoromethylsulfinyl, difluoromethylsulfonyl; m = 1 or s; n = 0 or 1 provided that a) when XA represents the difluoromethylsulfinyl group, then R1 represents hydrogen, R2 represents methyl, R3 represents methyloxy, R represents pyrimidyl-2, b) when XA represents the difluoromethylsulfinyl group, then R1 represents hydrogen R2 and R3 represents methyloxy, R represents pyrimidyl-2, c) m = 2, when R 1 represents hydrogen, XA represents difluoromethyloxy, R 2 represents methyl, R 3 represents methyloxy, R represents 1,3,5-triazinyl-2, d) Z represents sulfur, when R 1 represents hydrogen, R 2 represents methyl, R 3 represents methyloxy, XA represents difluoromethyloxy, R represents 1,3,5-triazinyl-2. Using the combinations of general formula (1) in doses of 0.01-5 kg / ha, the process allows to selectively control weeds in plant sowings.Tables: 11. |