Substituted thiosemicarbazones and use as plant growth regulants.

摘要

A method of regulating the growth of plants, including combating unwanted vegetation, comprises applying to the plants, either on seed, the soil or directly on the plants an effective amount of a compound having the general structural formula <CHEM> and X is O or S R is H.C1 to C4 alkyl or an agriculturally acceptable cation R1 is H or C1 to C4 alkyl or hydroxyalkyl R2 is H or C1 to C3 alkyl R3 is H, C1 to C8 alkyl, cycloalkyl or alkenyl, adamantyl, naphinyl 1,3,4-thiadiazol-2-yl. phenyl or mono- or disubstituted phenyl in which the substituents are selected from C1 to C4 alkyl, C1 to C4 alkoxy, benzyloxy, chloro, bromo, fluoro, iodo, cyano or trifluoromethyl, Z is halogen and R4 is C1 to C3 alkyl, allyl, benzyl of carboethoxymethyl.