Compounds of structure (I), the corresponding N-oxides and agriculturally acceptable salts, are disclosed as effective insecticides. In said formula, U is -(CH2)n-; Q is hydroxy; R is formula (II), in which V, W, Y, and Z are each hydrogen; X is a five- or six-membered heterocycle; optionally substituted with halogen, cyano, alkyl, haloalkyl, alkoxy, haloalkoxy, alkoxyalkyl, haloalkoxyalkyl, or aminocarbonyl; and the heterocycle is optionally connected to the phenyl ring through a -O-, -S-, -(CH¿2?)p, -C(O)-, or -O-(CR?3R4)¿q linkage; R?1 and R2¿ are independently selected from phenyl or pyridyl substituted with haloalkyl or haloalkoxy; R?3 and R4¿ are independently selected from hydrogen and methyl; n and p are independently 1, 2, or 3; and q is 1 or 2; with the proviso that at least one of R?1 and R2¿ is substituted in the para position; no more than two of R?3 and R4¿ are methyl; each aliphatic moiety contains not more than 4 carbon atoms; halogen means bromine, chlorine, or fluorine; each heterocycle contains from 1 to 4 nitrogen atoms, or 1 or 2 oxygen or sulfur atoms, or 1 or 2 nitrogen atoms and an oxygen or sulfur atom.