This document specifies a method for the determination of the toxic values of a wood preservative against the Reticulitermes species of European termites ). This method is applicable to: - water-insoluble chemicals which are being studied as active insecticides - organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates and - water soluble materials, for example salts. NOTE This method can be used in conjunction with an ageing procedure, for example EN 73.