Use for professional, domestic, public hygiene applications of formulations consisting of suspo-emulsions comprising: a component A): a microcapsule aqueous suspension, the microcapsules comprising at least one active ingredient selected from the pyrethroid and/or neonicotinoid classes, at least one synergistic agent selected from 5-[2-(2-butoxyethoxy)-ethoxy methyl]-6-propyl-1,3-benzodioxole (piperonylbutoxide-PBO), 5-[2-(2-butoxyethoxy)ethoxymethyl]-6-hexyl-1,3-benzodioxole, [1-(2-butyn-1-yloxy)ethyl]-1,2-dimethoxy benzene 4-(2-ethyl-hexyl)-4-aza-tricycle [5.2.1.0 2.6]dec-8-ene-3,5-dione, 5-(but-2-yloxymethyl)-6-propyl-1,3-benzo dioxole, and a component B): an emulsion comprising at least one active ingredient of the above classes, the same or different to the one in the microcapsules and at least the one synergistic agent, the same or different from the one in the microcapsules, the microcapsule shell consisting of polyurea, obtainable by interfacial polymerization of only diphenylmethylen-4,4'-diisocyanate optionally in admixture with PAPI and TDI, the formulations having a knockdown effect and a prolonged killing effect, even at three months, even at six and nine months from the application, wherein: the total amount of the microencapsulated components being not higher than 50% by weight with respect to the weight of component A), wherein the active ingredient ranges from 2 to 50% by weight of the sum of the components contained in the microcapsule, the ratio by weight synergistic agent/active ingredient in the microcapsule ranges from 49:1 to 1:1, the complement to 100% by weight of component A) comprising the polymer of the microcapsule wall, water and additives of the suspension; and wherein: the amount of active ingredient and of the synergistic agent being not higher than 50% by weight of component B), the ratio by weight synergistic agent/active ingredient in the emulsion being in the range 10:1 - 1:1, the complement to 100% by weight of component B) comprising water and additives, the additives of component A) and B) comprising dispersants and antifreeze agents, wherein the knock-down and killing effect of the formulations has been determined by using non-resistant insects with the following test: the insecticidal formulations, prepared by dilution with water, were applied on porous or on non porous surfaces, the insects kept into contact with the treated surface for 1 hour to evaluate the knock-down percentage of insects, afterwards the insects were transferred in an environment free from the insecticide and the mortality % (killing effect) evaluated after 24 hours, repeating then the test after 1, 2, 3, 6 and 9 months from the application with three repetitions each time and for each insect, running an untreated control group for establishing the insect natural mortality. the amount of active ingredient and of the synergistic agent being not higher than 50% by weight of component B), the ratio by weight synergistic agent/active ingredient in the emulsion being in the range 10:1 - 1:1, the complement to 100% by weight of component B) comprising water and additives, the additives of component A) and B) comprising dispersants and antifreeze agents, wherein the knock-down and killing effect of the formulations has been determined by using non-resistant insects with the following test: the insecticidal formulations, prepared by dilution with water, were applied on porous or on non porous surfaces, the insects kept into contact with the treated surface for 1 hour to evaluate the knock-down percentage of insects, afterwards the insects were transferred in an environment free from the insecticide and the mortality % (killing effect) evaluated after 24 hours, repeating then the test after 1, 2, 3, 6 and 9 months from the application with three repetitions each time and for each insect, running an untreated control group for establishing the insect natural mortality.