Provided are 1-aryl-5-alkyl pyrazole compounds, of formula (I): wherein: R 1 is hydrogen, cyano, halogen, R 8 , formyl, -C(O)R 8 , -C(O)OR 8 , -C(O)NR 9 R 10 , or -C(S)NH 2 ； R 2 is R 8 or -S(O) m R 11 ； R 3 is methyl, ethyl or C 1 -C 4 haloalkyl； R 4 , R 5 and R 7 are independently hydrogen, halogen, alkyl, haloalkyl, cyano or nitro； R 6 is halogen, alkyl, haloalkyl, alkoxy, haloalkyloxy, cyano, nitro, -C(O)R 12 , -S(O) n R 12 or SF 5 ； Z is a nitrogen atom or C-R 13 ； R 3 is alkyl, haloalkyl, cycloalkyl or halocycloalkyl； R 9 is hydrogen, alkyl, haloalkyl or alkoxy； R 10 is hydrogen, alkyl, haloalkyl or alkoxy； R n is alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl or cycloalkyl； R 12 is alkyl or haloalkyl； R 13 is hydrogen, halogen, cyano, nitro, alkyl, haloalkyl, alkoxy or haloalkoxy； m is 0, 1 or 2； and n is 0, 1 or 2； or a salt thereof, the method of making compounds of formula (I) and the use of these compounds against ectoparasites, endoparasites and pests.
