Abstract: A pyridine derivative of the formula (I), or its oxide or salt: ##STR1## wherein R.sup.1 is a halogen atom, an alkyl group, etc., R.sup.2 is an alkenyl group, an alkynyl group, an alkoxycarbonyl group, an alkenyloxycarbonyl group, etc., R.sup.3 is a hydrogen atom, etc., R.sup.4 is a halogen atom, a cyano group, a haloalkyl group, etc., each of R.sup.5 and R.sup.6 is a hydrogen atom, etc., Q is a methine group or a nitrogen atom, m is 0 or 1, n is 1 or 2 and r is 1 or 2. Such a compound is useful as a pesticide. The compound of the present invention is a pyridine derivative which is capable of killing or controlling various pests without adversely affecting crop plants and which is readily decomposable and presents no substantial acute toxity to mammals.

Abstract: The present invention presents a benzylsulfide derivative of the formula (I) or its salt: ##STR1## wherein R.sup.1 is a C.sub.1-6 alkyl group, a C.sub.1-6 haloalkyl group, a C.sub.2-4 alkenyl group, a cyano group, etc., and each of R.sup.2 and R.sup.3 is a hydrogen atom, a halogen atom, a cyano group, a C.sub.1-4 alkyl group, a C.sub.1-3 haloalkyl group, etc., R.sup.4 is a hydrogen atom, a halogen atom, a C.sub.1-4 alkyl group, etc., A is a hydrazinoaralkyl group or hydrazonoaralkyl group, and n is 0, 1 or 2; a process for its production; and a pesticide containing such a benzylsulfide derivative as an active ingredient. The benzylsulfide derivative of the present invention is capable of controlling various pests without adversely affecting crop plants.