Synergistic composition able to rapidly and efficiently terminate Rhynchophorus ferrugineus infestation, in palms or other species suffering from this parasite. The composition comprises one or more among permethrin, cypermethrin, lambda-cyhalothrin； one or more among chlorpyrifos methyl, and chlorpyrifos ethyl； furthermore, benzisothiazolin-3-one, piperonyl butoxide, imidacloprid. The parasite dies shortly after contact with the product, infestation is terminated, and the palm remains protected against new attacks for a long time； the product is not toxic to the palm, on the contrary the plant recovers a level of health even higher than the initial one.
