| 摘要 |
Agents for defoliating cotton plants contain, in addition to conventional additives, a phenylsulfonyl- or hetarylsulfonylurea I <IMAGE> I where A is substituted phenyl, benzyl or a heteroaromatic radical, Rhu 2 is hydrogen or methyl, R3 is methyl, methoxy, difluoromethoxy, chlorine or methylamino, R4 is methyl, methoxy, difluoromethoxy or ethoxy and Z is CH or N, or an alkali metal or alkaline earth metal salt of the compounds I.
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