Thiadiazole derivatives with excellent herbicidal effectiveness, wide herbicidal spectrum and excellent selectivity are disclosed. The thiadiazole derivatives are represented by one of the formula [I]-[IV]. ##STR1##
披露了具有出色除草效果、广泛的除草谱和优异选择性的
噻二唑衍
生物。这些
噻二唑衍
生物由公式[I]-[IV]中的一种代表。