A method for the prophylactic treatment of the development of parasites in a food product storage silo, the food product storage generating the deposit of food product scraps and/or dust on the walls of the silo, said prophylactic treatment method comprising the application, to at least one part of the walls, of a layer comprising at least 10 g of mineral per m2 of wall, the mineral being chosen from: an alkali metal bicarbonate, an alkaline-earth metal carbonate, an alkali metal sulphate, an alkaline-earth metal sulphate, an alkaline-earth metal oxide, and mixtures thereof； the mineral being in the form of particles having an average diameter of at most 200 μm； and said method being characterized in that the application of the layer is carried out after emptying of the silo, on food product scraps and/or dust deposited on the walls of the silo.
