Claim 1: exoparasite control agents, including n-pyridine-pyridan compounds, diene monooxide or salts of these compounds, wherein n-pyridine-pyridan compounds are expressed in formula (1),characterized in that R1 is a halogen atom, a C1-4 haloalkyl group, a cyano group, a nitro group or a C1-4 alkoxycarbonyl group； R2, R3, R4, R5, R6, R7, R8 and R9 are each a hydrogen atom or a C1-4 alkyl group； each pair of R2 and R8, and R4 and R6, can join to form a C1-4 alkylene group； R10 is a hydrogen atom； a C1-20 alkyl group； a C3-8 cycloalkyl group； a C2-6 alkenyl group； a C2-6 alkynyl group； a C1-6 haloalkyl group； a C2-6 haloalkenyl group； a C1-6 alkylcarbonyl group； a C1-6 alkoxycarbonyl group； a benzoyl group optionally substituted on the phenyl ring with one to five halogen atoms；An optional phenyl compound is replaced by one or more substitutes in the cyclic phenyl, each of which is independently selected from the group of halogen, C1-4 tar and C1-4 halide； an optional non periodic substitute is replaced in the heterocyclic ring with one or more substitutes, Each substance is selected independently from halogen, C1-4 tar, C1-4 halo tar and alternative aperiodic groups； or from C1-4 tar groups replaced by one or more alternatives.Each of them is selected independently from the group C3-8 of cyclododecane, which is selectively replaced by halogen, cyanogen, nitrogen, thyroid, oxygen C1-6, halogen C1-4, benzepam, phenyl con (R12) (R13).phenyl optionally substituted on the phenyl ring with one or more halogen atoms, and heterocyclic groups optionally substituted on the heterocyclic ring with one or more C1-4 alkyl groups； wherein R12 and R13 are each a C1-4 alkyl group； or R12 and R13 can join to form a C2-7 alkylene group； R11 is a halogen atom； a C1-6 alkyl group； a C1-4 haloalkyl group； a C1-4 hydroxyalkyl group； a C1-4 alkoxycarbonyl group； a C1-4 alkylcarbonyl group； a mono or di (C1-4alkyl) aminocarbonyl group； a nitro group； a cyano group； a formyl group； -C (R14)
