This document specifies a method for the determination of the toxic values of a wood preservative against the larvae of Hylotrupes bajulus (Linnaeus), introduced into wood treated previously by full impregnation. This method is applicable to: ¾ water-insoluble chemicals which are being studied as active insecticides; ¾ organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates; ¾ organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates; ¾ water-soluble materials, for example salts. The method is applicable whether or not the test specimens have been subjected to appropriate ageing procedures.
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