BS EN 20-2:2023 – TC 2024

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Tracked Changes. Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens) – Application by impregnation (Laboratory method)

Published By	Publication Date	Number of Pages
BSI	2024	60

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Categories: 71.100.50 - Wood-protecting chemicals, BSI

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Description

This part of the EN 20 series specifies a method for the determination of the protective effectiveness or the toxic values of a wood preservative against infection by Lyctus brunneus (Stephens) in wood which has been treated previously by full impregantion. This method is applicable to: – water-insoluble chemicals which are being studied as active insecticides; or – organic formulsation, as supplied or as prepared in the laboratory by dilution of concentrates. This method is applicable to water-based preservatives. NOTE This method can be used in conjuction with ageing procedures, which do not remove the added nutrient.

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PDF Pages	PDF Title
1	30485183
35	A-30452940
36	undefined
42	1 Scope 2 Normative references 3 Terms and definitions 4 Principle
43	5 Test materials and apparatus 5.1 Biological material 5.2 Products and reagents 5.3 Apparatus
44	6 Sampling 7 Test specimens 7.1 Species of wood
45	7.2 Quality of wood 7.3 Provision of test specimens 7.4 Dimensions of test specimens 7.5 Number of test specimens 8 Procedure 8.1 Prior impregnation of the test specimens with a nutrient solution 8.1.1 Composition of the nutrient solution
46	8.1.2 Method of impregnation of nutrient solution 8.1.3 Drying of test specimens 8.2 Conditioning of specimens before end sealing 8.3 Treatment of test specimens 8.3.1 Preparation of treatment solutions 8.3.1.1 Solid preservatives 8.3.1.2 Liquid preservatives 8.3.1.3 Toxic values 8.3.2 Impregnation
47	8.4 Drying and conditioning of the test specimens after treatment
48	8.5 Exposure of the test specimens to the insects 8.6 Conditions and duration of test 8.7 Examination of the test specimens 9 Validity of the test
49	10 Expression of results 10.1 Assessment of the protective effectiveness 10.2 Toxic values 11 Test report
51	Annex A (informative)Example of a test report
53	Annex B (informative)Technique for culturing Lyctus brunneus B.1 Introduction B.2 Diets B.2.1 Wood
55	B.2.2 Artificial diet B.3 Obtaining adult beetles
56	B.4 Culturing procedure B.5 Identification of sex B.6 Precautions against infestation by parasites
57	Annex C (informative)Principal parasites and predators of Lyctus C.1 Mites C.2 Insects

Additional information

Status	Definitive
Pages	60
Publication Date	2024-01-04
ISBN	978 0 539 29998 4
Standard Number	BS EN 20-2:2023 – TC
Title	Tracked Changes. Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens) – Application by impregnation (Laboratory method)
Descriptors	Biological analysis and testing, Wood preservation, Toxicity, Test specimens, Wood preservatives, Oak (wood), Coleoptera, Culture techniques, Impregnated materials, Wood-boring organisms, Preservatives, Concentration (chemical), Performance testing, Laboratory testing, Specimen preparation
Publisher	BSI
Committee	B/515
ICS Codes	71.100.50 - Wood-protecting chemicals

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BS EN 20-2:2023 – TC 2024

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