Use of formulations consisting of suspo-emulsions comprising a microcapsule suspension, the microcapsules including at least one active ingredient selected from the pyrethroid and/or neonicotinoid classes, at least one synergistic agent, and an emulsion comprising at least an active ingredient of the above classes, and at least one synergistic agent, the microcapsules being formed of polyurea, obtainable by inter-facial polymerization of diphenylmethylen-4,4&prime；-diisocyanate, optionally in admixture with polymethylenpolyphenylisocyanate, the formulations having a prolonged knockdown and killing effect, even of three months, even of six months or even of nine months, the suspo-emulsions comprising: component A): microcapsules in suspension comprising inside the microcapsule at least one active ingredient, a synergistic agent, optionally a solvent, the total amount of these components being not higher than 50% by weight with respect to the weight of the suspension A), the complement to 100% by weight of component A) comprising the polymer of the micro-capsule shell, water and additives； component B): emulsion comprising an amount of at least one active ingredient and one synergistic agent, the amount of active ingredient+synergistic agent being not higher than 50% by weight of the emulsion, of component B) constituted by water, additives, optionally solvents.L'invention porte sur l'utilisation de formulations constituées de suspo-émulsions comprenant une suspension de microcapsules, les microcapsules comprenant au moins un principe actif choisi dans les classes des pyréthroïdes et/ou des néonicotinoïdes et au moins un agent synergique, et une émulsion comprenant au moins un principe actif des classes ci-dessus et au moins un agent synergique, les microcapsules étant constituées de polyurée, pouvant être obtenue par polymérisation interfaciale de 4,4'-diisocyanate de diphénylméthylène, éventuellement en mélange avec du polyméthylène-polyphényl-isocyanate, les formul
