Synergistic insecticidal mixtures based on chloronicotinyl insecticides

The present invention relates to insecticidal compositions comprising the chlor-nicotinyl derivative of the general formula (I) which comprises an insecticidal agent and one or more synergistic compounds. In the general formula (I), R1 is a C1-C5 alkyl group, R2 is a hydrogen atom or a C1-C5 alkyl group, or R1 and R2 together are -CH2-CH2-; -CH 2 -CH 2 -CH 2 - or a group of formula (a); X is NH or NCH 3; Y is a nitrogens or CH- group; Z is a cyano or nitrile duct with one or more compounds having synergistic activity . ŕ