Compounds having the formula
wherein Y is hydrogen, chloro or bromo; X is O or S, and R is an alkyl or chlorosubstituted alkyl radical having from 1 to 6 carbon atoms provide selective control of grassy weeds in the presence of valuable crops.
式中 Y 为氢、
氯或
溴;X 为 O 或 S,R 为具有 1 至 6 个碳原子的烷基或
氯代烷基的化合物可选择性地控制有价值作物中的禾本科杂草。