COMPOUND, PROCESS FOR ITS PREPARATION, HERBICIDE COMPOSITION, PROCESS FOR WEED CONTROL, AND PROCESS FOR SELECTIVE FIGHTING OF WEEDS AND CROPS

摘要

An N'-phenyl-N-methyl-urea derivative of the formula: IMAGE wherein R1, R2 and R3 are each hydrogen, lower alkyl, lower alkoxy, lower alkylthio, halogen or trifluoromethyl, R4 is hydrogen or lower alkyl, A is methyl or methoxy, X is oxygen or sulfur, Y is hydrogen or halogen, Z is a straight or branched alkylene chain having not more than 8 carbon atoms which may have no less than one atom of oxygen and/or sulfur inside and/or at the end of the alkylene chain and n is an integer of 1 to 3, which shows a pronounced herbicidal activity against a wide variety of weeds in the cultivation of crop plants without any material toxicity to mammals or fish or any chemical injury to said crop plants.