| 摘要 |
New compositions for defoliating plants possessed of synergistic activity comprising (A) a compound of formula I <IMAGE> I in which R1 is hydrogen or C1-C4-alkyl, R2 is hydrogen, C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkylthio, R3 is hydrogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio or C3-C8-cycloalkyl, wherein R2 and R3 taken together with the nitrogen atom to which they are attached is a morpholino- piperidino- or pyrrolidino-group, X is oxygen or sulfur, Y can be the same or different and is hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkoxy-C1-C2-alkyl, C1-C4-alkylthio, trifluoromethyl or nitro, and n is the number 1, 2, 3, 4 or 5, in combination with (B) a defoliant for plants in a proportion of 1 to 99 parts by weight of component (A) to 99 to 1 parts by weight of component (B). As the defoliant there can be employed 1,2,3-thiadiazole-5-yl-urea derivatives, 1,2,3-thiadiazole-5-carboxylic acid derivatives, benzylaminopurine derivatives, 2,3-dihydro-5,6-dimethyl-1,4-dithiine-1,1,4,4-tetroxide, 1,1'-dimethyl-4,4'-bipyridilium-dichloride, sodium chlorate and S,S,S-tributylphosphortrithioate. The compositions of the invention are especially suitable for use in the defoliation of cotton plants. |
