Barriers red mite concentrate makes up 25 ltr of mix which you can spray directly on to your birds. It uses the same 100 percent natural ingredients found in the powder version and is excellent for eradicating lice and mites from your hens or hen house. Entirely non toxic barrier red mite concentrate is suitable for use in organic farming systems. Fast acting formula lasts for up to 6 weeks, ideal for all birds and poultry. Can be used in organic and intensive farming systems.