Insect control with substituted triazole and tetrazole compounds

A method of killing or controlling insects or arachnids which comprises contacting said insects or arachnids or the locus thereof with an insecticidal or arachnicidal amount of a compound of Formula I or Formula II:

• ##STR17## wherein Y represents CH or N;
• Z represents H, F, Cl, Br, CN, CO.sub.2 R.sup.1, CONH.sub.2, CONHR.sup.1, CONR.sup.1 R.sup.1, OR.sup.1, SR.sup.1, NH.sub.2, NHR.sup.1, NR.sup.1 R.sup.1, NHOR.sup.1, cyclopropyl, CH.dbd.CH.sub.2, C.tbd.CR.sup.2, or C.sub.1 -C.sub.2 alkyl optionally monosubstituted with F, OH, OR.sup.1, SR.sup.1, NH.sub.2, NHR.sup.1, NR.sup.1 R.sup.1, CO.sub.2 R.sup.1, CONH.sub.2, CONHR.sup.1, or CONR.sup.1 R.sup.1 ;
• R.sup.1 is C.sub.1 -C.sub.2 alkyl, CH.sub.2 --C.tbd.CH, CH.sub.2 --CH.dbd.CH.sub.2, benzyl, or cyclopropylmethyl;
• R.sup.2 is H or SIR.sup.3 ;
• R.sup.3 is C.sub.1 -C.sub.4 alkyl;
• R is an aliphatic nitrogen containing heterocyclic moiety selected from groups R.sub.a through R.sub.k where R.sub.a through R.sub.k are as follows:
• ##STR18## wherein R.sup.4 represents H or C.sub.1 -C.sub.2 alkyl;
• R.sup.5 represents F, Cl, Br, OH, CO.sub.2 R.sup.1, C.sub.1 -C.sub.4 alkyl, or C.sub.1 -C.sub.4 alkoxy;
• n represents the integer 0, 1, or 2;
• or an agriculturally acceptable acid addition salt thereof;
• or otherwise causing an insecticidal or arachnicidal amount of said compound to be present within said insects or arachnids.