Spraying against bark beetle Forester is intended for remediation of bark beetles in a dose of 1.00% at a dose of 5 l per m3 (1 l of product approx. 20 m3). An over-the-counter insecticide without restrictions on professional competence and is approved for the remediation of bark wood. Call or write to the number +420-730-685-960 (In the store it costs (1200 crowns for 1 liter - I will sell it much cheaper)