Pest control treatment in organic agriculture. It is an aqueous solution of potassium silicate that is fully water-soluble, suitable for all mineral treatments, particularly for trunk paste applications. The silicate forms a hard inorganic film on plants, thereby hindering the activity of pests with limited mobility. It also has a preventive action against insects that pierce the cuticle of leaves and fruits It is now commonly used as a replacement for sodium silicate to avoid the addition of sodium to the soil. Moreover, due to its high content of potassium and silicon, it contributes to foliar nutrition.