Spiroheterocyclic n-oxypiperidines as pesticides

Compounds of the formula I

• wherein
• X, Y and Z independently of each other are C1-4alkyl, C3-6cycloalkyl, C1-4haloalkyl, C1-4alkoxy, halogen, phenyl or phenyl substituted by C1-4alkyl, C1-4haloalkyl, halogen or cyano;
• m and n, independently of each other, are 0, 1, 2 or 3 and m+n is 0, 1, 2 or 3;
• G is hydrogen, a metal, ammonium, sulfonium or a latentiating group;
• R is hydrogen, C1-6alkyl, C1-6haloalkyl, C1-6cyanoalkyl, benzyl, C1-4alkoxy(C1-4)alkyl, C1-4alkoxy(C1-4)alkoxy(C1-4)alkyl or a group selected from G;
• and
• A is C1-6alkyl, C1-6haloalkyl, C3-6cycloalkyl, C3-6cycloalkyl(C1-4)alkyl, or C3-6cycloalkyl(C1-4)alkyl where in the cycloalkyl moiety a methylene group is replaced by O, S or NR0, where R0 is C1-6alkyl or C1-6alkoxy, or A is C2-6alkenyl, C2-6haloalkenyl, C3-6alkynyl, C1-6cyanoalkyl, benzyl, C1-4alkoxy(C1-4)alkyl, C1-4alkoxy(C1-4)alkoxy(C1-4)alkyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, C1-6alkylcarbonyl, C1-6alkoxycarbonyl, C3-6cycloalkyl carbonyl, N-di(C1-6alkyl)carbamoyl, benzoyl, C1-6alkylsulfonyl, phenylsulfonyl, C1-4alkylthio(C1-4)alkyl, C1-4alkylsulfinyl(C1-4)alkyl or C1-4alkylsulfonyl(C1-4)alkyl;
• or an agrochemically acceptable salt or an N-oxide thereof.