| 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 <IMAGE> in which one of Q1, Q2, Q3 or Q4 is N, X is -OH or -O-(C1-C4 alkyl) and Y is H or X and Y together represent a bond between carbon and nitrogen atoms and R is H or one or two of the following substituents: -Br, -Cl, -F, -I, -CF3, -CH3, -NO2 or -C 3BOND N, or an agriculturally acceptable salt thereof.
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