| 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 novel compound of the class having the general structural formula <CHEM> in which R<1> is H, or one to four substituents selected from C1, nitro, lower alkyl and lower alkoxy, R<2> is H, lower alkyl, lower alkoxyalkyl, lower alkenyl, lower haloalkyl or agriculturally acceptable cation, R<3> is H, lower alkyl, lower alkenyl, lower alkynyl, lower haloalkyl or benzyl and R<4> is H or at least one substituent selected from 3,4-trimethylene, F, Cl, Br, CF3, nitro, lower dialkylamino, lower alkylcarbonyl, lower alkyl and lower alkoxy with the further provision that at least one ortho position is unsubstituted. |
