3 h 7 or cyclo c 3 h 5 r 6 is h ch 3 or c 2 h 5 y is a hydrocarbon chain cr 7 2 n r 3 is a substituted heterocyclic radical of the formula str11 b is c 3 c 4 alkenyl which is unsubstituted or substituted by up to 3 c 1 c 4 alkyl groups or by a phenyl radical or r 3 is a bicyclic system of the formulae str12 x is hydrogen f cl or c 1 c 3 alkyl z is f cl or c 1 c 4 alkoxy particularly preferred are also compounds of the formula i in which r 1 is hydrogen c 1 c 2 alkyl cf 3 c 2 f 5 or ch 2 cf 3 r 2 is cl c 1 c 6 alkyl c 1 c 6 alkoxy c 1 c 6 mercaptoalkyl c 1 c 6 fluoroalkoxy c 1 c 6 fluroalkyl c 3 c 6 cycloalkyl or nr 4 r 5 r 4 and r 5 together are a ch 2 2 7 chain in which one of the ch 2 groups can be replaced by oxygen sulfur or nr 6 where at least one ch 2 group must stand between the n atom of the nr 4 r 5 and the oxygen sulfur or nr 6 or r 4 r 5 and r 6 independently of one another are hydrogen c 1 c 6 alkyl c k h 2k c m f 2m.