Patent ID: 8664235

Claim:
A method of combating insects which comprises contacting the insects, their habitat, breeding ground, food supply, plant, seed, soil, area, material or environment in which the insects are growing or may grow, or the materials, plants, seeds, soils, surfaces or spaces to be protected from insect attack or infestation with a insecticidally effective amount of at least one 6-halogeno-[1,2,4]-triazolo[1,5-a]-pyrimidine of the general formula I wherein X is halogen; R 1 is hydrogen; R 2 is C 1 -C 10 -alkyl or C 1 -C 2 -fluoralkyl; R 3 is hydrogen; and R 4 is C 3 -C 8 -cycloalkyl, phenyl, or phenyl-C1-C4-alkyl wherein each phenyl and C 3 -C 8 -cycloalkyl may be unsubstituted or may carry one or two radicals which are selected, independently from each other, from the group consisting of halogen, cyano, nitro, hydroxy, C 1 -C 10 -alkyl, C 1 -C 10 -alkoxy, C 1 -C 10 -haloalkyl, C 1 -C 10 -haloalkoxy, amino, C 1 -C 10 -alkylamino, di(C 1 -C 10 -alkyl)amino, C 1 -C 10 -alkylthio, C 1 -C 10 -alkylsulfonyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl, phenyl, phenyl-C 1 -C 4 -alkoxy and phenyloxy, wherein the five last-mentioned radicals for their part may be unsubstituted or may carry one, two or three substituents which are selected, independently from each other, from the group consisting of C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy and halogen, it being also possible for C 3 -C 10 -cycloalkyl and phenyl groups to be fused to a 5- to 7-membered saturated, unsaturated or aromatic carbocyclic ring or to a 5- to 7-membered heterocyclic ring and said fused ring may be unsubstituted or may itself carry one, two, three, four, five or six substituents which are selected, independently from each other from the group consisting of halogen and C 1 -C 4 -alkyl; and/or at least one agriculturally acceptable salt thereof, thereby combating insects.