BS EN 20-2:1993

Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens). Application by impregnation (laboratory method) | Status: Superseded, Withdrawn

1 Scope This Part of EN 20 specifies a method for the determination of the protective effectiveness or the toxic values of a wood preservative against infestation by Lyctus brunneus (Stephens) in wood which has been treated previously by full impregnation. This method is applicable to:

• — water-insoluble chemicals which are being studied as active insecticides, or,
• — organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates.

This method is not applicable to water-based perservatives.

NOTE This method may be used in conjuction with ageing procedures, which do not remove the added nutrient.