A synergistic insecticidal composition comprises component (A) at least one neonicotinoid insecticide and component (B) at least one avermectin insecticide. There is also provided a method to prevent control and/or treat insect infestations in plants plant parts and/or surrounding by applying a combination of component (A) at least one neonicotinoid insecticide and component (B) at least one avermectin insecticide.