New 1,2,3 - tiadiazol - 3 - 5 - urea - ylidene Properties of Plant Growth regulators, procedures for the production of these compounds.As well as compositions of Effect Plant Growth Regulator containing the same

摘要

1,2,3-Thiadiazole-3-in-5-ylidene-urea derivative of the formula IMAGE I in which R1 is hydrogen or alkyl which may be substituted in one or several places by oxygen or sulfur and wherein R2 and R3 have the meaning as given in the attached specification and wherein X is oxygen or sulfur. The compounds have properties suited for controlling the natural growth and natural development of plants and in addition have a superior defoliating property without accompanying unpleasant odors.