| 摘要 |
Plant defoliants are characterised in that they contain a 1,3,4-thiadiazol-2-yl-urea of the formula I …<IMAGE>… in which… R<1> is hydrogen or methyl and… R<2> is C1-C6-alkyl, C3-C8-cycloalkyl, C2-C4-alkenyl, C3-C6-alkinyl and phenyl which is optionally substituted by up to 2 chlorine or fluorine atoms or by methyl groups, trifluoromethyl groups or methoxy groups, and the preparation of the composition and its use in a method for defoliating plants. |
