The invention concerns insecticide compositions comprising: a) between 0.001 and 5 %, preferable between 0.05 and 1% of a compound of the type 1-phenyl pyrazole, in particular 1-[2,6-Cl24-CF3 phenyl]3-CN4[SO—CF3]5-NH2 pyrazole ; and b) between 0.05 and 10%, preferably between 0.1 and 5% of one (or several) moisture retaining agent of the organic type; and c) between 40 and 99%, preferably between 50 and 98% (and more preferably between 70 and 97%) of vegetable flour. The invention also concerns a method for fighting insects using said composition, in particular against click beetles.