N-(3-t-Butyl-1,2,4-thiadiazol-5-yl)-urea derivs - prepd by reacting 5-alkylamino-3-butyl-1,2,4-thiadiazole with methyl isocyanate

摘要

Thiadiazolylurea derivs. of formula (I) (where R1 is methyl or ethyl), e.g. N-(3-tert. butyl-1,2,4-thiadiazol-5-yl)-N, N'-dimethyl-urea, are new cpds. (I) are herbicides which are well tolerated by crop plants. They are particularly suitable for controlling weeds in wheat and barley, and may also be used in crops of maize, rice, oats, cotton and soya beans.