The present invention provides a new insecticide formulation based oncyclodextrin characterised in that the active substance (insecticide and/orinsect growth regulator), and a compound synergistic with the activesubstance, are complexed simultaneously with cyclodextrin. The formulationpresents as a solid or as a solid/oil composition, and is soluble orcompletely emulsifiable in water or in aqueous mixtures of water misciblesolvents. The activity of the present formulations was found to be greaterthan that of a mixture of the two active components each complexed separatelywith cyclodextrin, for the same dose. The preparation process of saidformulation and its use as an insecticide in agriculture, for veterinary useor to eliminate household insects, are further aspects of the presentinvention.
