- 1,3,4-thiadiazolyl ureas and processes for controlling weeds and wild grasses therewith
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Compounds of the formula STR1 are described in which R1 represents a perfluoroalkyl radical of from 1 to 2 carbon atoms, and at least one of R2 and R3 represents hydrogen, and the other, or both represent lower alkyl, and R4 represents a lower alkyl radical which may be unsubstituted or bear certain substitution, and which are useful as herbicides in a method for controlling weeds and wild grasses. Compositions containing such compounds are also described. Finally, novel fluoro-thio semicarbazides are described which are useful intermediates in the production of the compounds of Formula I.
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