The invention relates to a method of controlling insects in the family Curculionidae, using at least one active ingredient selected from (I) N-(cyanomethyl)-4-(trifluoromethyl)-3-pyridinecarboxamide (flonicamid), (II) N-[[[2,5-Dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy)phenyl]amino]carbonyl] -2,6-difluorobenzamide (Iufenuron) and (III)1-acetyl-3,4-dihydro-3-[(3-pyridinylmethyl)amino]-6-[1,2,2,2-tetrafluoro-1- (trifluoromethyl)ethyl]-2(1H)-quinazolinone (pyrifluquinazon) in free form or in agrochemically acceptable salt form.
