Abstract: A pesticidal composition and anti-parasitic treatment using the same, wherein the composition includes, in a combined pesticidally effective amount (a) carbaryl and (b) a compound having the formula wherein: R1 is CN; R2 is S(O)nR3, 4,5-dicyanoimidazol-2-yl or haloalkyl; R3 is alkyl or haloalkyl; R4 is hydrogen, halogen, NR5R6, S(O)mR7, C(O)R7, C(O)O—R7, alkyl, haloalkyl, OR8 or —N═C(R9)(R10); R5 and R6 independently are hydrogen, alkyl, haloalkyl, C(O)alkyl, alkoxycarbonyl or S(O)rCF3; or R5 and R6 together form a divalent alkylene radical which is optionally interrupted by one or two divalent heteroatoms selected from the group consisting of oxygen and sulfur; R7 is alkyl or haloalkyl; R8 is alkyl, haloalkyl or hydrogen; R9 is alkyl or hydrogen; R10 is phenyl or heteroaryl optionally substituted by one or more halogen, OH, —O-alkyl, —S-alkyl, cyano or alkyl; R11 and R12 are, independently of each other, hydrogen, halogen, CN or NO2; R13 is halogen, haloalkyl, h

Abstract: Processes for the antiparasitic control of darkling beetles utilizing 1-arylpyrazole insecticides and for applying said insecticides to animal litter, especially for animal rearing, are described. Also described are mixtures of carbaryl and 1-arylpyrazole insecticides.