Barrier is a biological pesticide of Top Crop. A basic potassium silicate, is able to reinforce the cell walls of the leaves and stems so that they are less attractive and more difficult to biting by insects. In addition to being a useful tool during flowering due to its high potassium content, Barrier increases the production of hard cellulose, the amount of chlorophyll and the absorption of CO2. Indeed potassium speeds up the transposed of nutrients and increases the yield of the garden.