BS EN 20-1:2023

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

Published By	Publication Date	Number of Pages
BSI	2023	26

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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) 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 formulsation, 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 can be used in conjuction with ageing procedures, which do not remove the added nutrient.

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PDF Pages	PDF Title
2	undefined
8	1 Scope 2 Normative references 3 Terms and definitions 4 Principle
9	5 Test materials and apparatus 5.1 Biological material 5.2 Products and reagents 5.3 Apparatus
10	6 Sampling 7 Test specimens 7.1 Species of wood
11	7.2 Quality of wood 7.3 Provision of the 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
12	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 Preparation of test specimens 8.3.1 Sealing of transverse surfaces 8.3.2 Treatment of test specimens 8.3.2.1 Preparation of treatment solution
13	8.3.2.2 Application of the treatment solution 8.4 Drying and conditioning of the test specimens after treatment
14	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 test 10 Expression of results 10.1 Assessment of the protective effectiveness
15	10.2 Toxic values 11 Test report
17	Annex A (informative)Example of a test report
19	Annex B (informative)Technique for culturing Lyctus brunneus B.1 General B.2 Diets B.2.1 Woods
21	B.2.2 Artificial diet B.3 Obtaining adults beetles
22	B.4 Culturing procedure B.5 Identifiction of sex B.6 Precautions against infestation by parasites
23	Annex C (informative)Principal parasites and predators of Lyctus C.1 Mites C.2 Insects

Additional information

Status	Definitive
Pages	26
Publication Date	2023-12-08
ISBN	978 0 539 21445 1
Standard Number	BS EN 20-1:2023
Title	Wood preservatives. Determination of the protective effectiveness against Lyctus brunneus (Stephens) – Application by surface treatment (laboratory method)
Identical National Standard Of	EN 20-1
Replaces	BS EN 20-1:1992
Descriptors	Toxicity, Wood preservatives, Culture techniques, Coleoptera, Preservatives, Wood-boring organisms, Specimen preparation, Oak (wood), Reports, Testing conditions, Test specimens, Test equipment, Visual inspection (testing), Wood preservation, Comparative tests, Biological analysis and testing, Laboratory testing
Publisher	BSI
Committee	B/515
ICS Codes	71.100.50 - Wood-protecting chemicals

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BS EN 20-1:2023

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