Heterocyclic imino compounds of general formula (1) and agrochemically acceptable salts thereof; and agricultural chemicals, fungicides and insecticides, each containing as the active ingredient at least one member selected from the group consisting of the imino compounds and the salts wherein G is a group of general formula (a), or the like; A is a 3- to 13-membered, mono-, di- or tricyclic ring which is composed of 3 to 13 atoms arbitrarily selected from among carbon, oxygen, sulfur and nitrogen, contains at least one heteroatom selected from among oxygen, sulfur and nitrogen, and may be substituted with 1 to 13 Ys, with the proviso that when A is a quinolone ring, the nitrogen atom of the ring is present at the α-position to the imino linkage; Z is -OR1 or the like; B is -CH¿2?- or the like; Y is Y'-D-(CH2)p- or the like; D is a single bond or the like; X is halogeno or the like; and R?1¿ is hydrogen, C¿1-6? alkyl, C1-6haloalkyl, or the like.