into the blending equipment the polar solvent is capable of dissolving at least 10 grams of the insecticide per one liter of the polar solvent in order to ensure that a sufficient amount of insecticide is added without adding too much polar solvent the dissolvability of the insecticide is important it is desirable to only add a low dosage of the insecticide that is sufficient to repel insect attacks therefore it is important to ensure the low dosage is distributed throughout if the solvent is capable of dissolving only less than 10 grams then in order to have enough of the insecticide more solvent would be needed this creates the problem that the lignocellulosic composite material will not have sufficient physical properties such as modulus of elasticity when the lignocellulosic composite material is formed under elevated temperature the solvent evaporates from the mixture if too much solvent in added the evaporating solvent creates a steam pressure within the forming lignocellulosic composite material and it hinders the physical properties it has been determined that certain polar solvents are capable of dissolving at least 10 grams of the insecticide per liter of solvent for example it has also been determined that water is not a sufficient polar solvent for certain insecticides such as fipronil because it.