Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens) - Application by surface treatment (laboratory method)

Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens) - Application by surface treatment (laboratory method)

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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) when the product is applied as a surface treatment to wood.
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, or,
  • — organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates, or
  • — water-soluble materials, for example salts.

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