prEN 47

SLOVENSKI STANDARD
01-december-2025
Biocidni proizvodi za zaščito lesa - Ugotavljanje toksičnih vrednosti proti ličinkam
hišnega kozlička Hylotrupes bajulus (Linnaeus) (laboratorijska metoda)
Wood preservatives - Determination of the toxic values against larvae of Hylotrupes
bajulus (Linnaeus) - (Laboratory method)
Holzschutzmittel - Bestimmung der Grenze der Wirksamkeit gegenüber Larven von
Hylotrupes bajulus (Linnaeus) - (Laboratoriumsverfahren)
Produits de préservation du bois - Détermination des valeurs toxiques contre les larves
d'Hylotrupes bajulus (Linnaeus) - (Méthode de laboratoire)
Ta slovenski standard je istoveten z: prEN 47
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2025
ICS 71.100.50 Will supersede EN 47:2016
English Version
Wood preservatives - Determination of the toxic values
against larvae of Hylotrupes bajulus (Linnaeus) -
(Laboratory method)
Produits de préservation du bois - Détermination des Holzschutzmittel - Bestimmung der Grenze der
valeurs toxiques contre les larves d'Hylotrupes bajulus Wirksamkeit gegenüber Larven von Hylotrupes bajulus
(Linnaeus) - (Méthode de laboratoire) (Linnaeus) - (Laboratoriumsverfahren)
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 38.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 47:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative reference . 6
3 Terms and definitions . 6
4 Principle . 6
5 Test materials . 7
5.1 Biological material . 7
5.1.1 Hylotrupes bajulus (Linnaeus) larvae . 7
5.1.2 Source of larvae . 7
5.1.3 Provision of larvae . 7
5.1.4 Choice of larvae in Category 2. 7
5.1.5 Number of larvae . 7
5.2 Products and reagents . 8
5.2.1 Xylene, technical grade. . 8
5.3 Apparatus . 8
6 Sampling . 9
7 Test specimens . 9
7.1 Species of wood . 9
7.2 Wood quality . 10
7.3 Provision of test specimens . 10
7.4 Dimensions of test specimens . 10
7.5 Number of test specimens . 10
8 Procedure. 11
8.1 Preparation of test specimens . 11
8.1.1 Conditioning of test specimens before treatment . 11
8.1.2 Treatment of the test specimens . 11
8.1.3 Drying and conditioning of the test specimens after treatment . 12
8.2 Exposure of the test specimens to the insects . 12
8.2.1 Use of larvae in Category 1 . 12
8.2.2 Use of larvae in Category 2 . 13
8.3 Conditions and duration of the test . 14
8.4 Examination of the test specimens . 14
8.4.1 Examination without imaging facilities . 14
8.4.2 Examination with imaging facilities, (larvae in Category 2) . 14
8.4.3 Verification of the state of the larvae . 14
8.4.4 Validity of the test . 14
9 Expression of results . 15
10 Test report . 15
Annex A (informative) Example of a test report . 17
Annex B (informative) Technique for culturing Hylotrupes bajulus (Linnaeus) . 19
B.1 General . 19
B.2 Obtaining parent beetles . 19
B.3 Mating . 19
B.4 Egg-Iaying . 19
B.5 Hatching of eggs . 20
B.6 Larval development . 20
B.7 Enemies and parasites . 21
Annex C (normative) Differentiation of heartwood and sapwood in Pinus species . 22
C.1 Principle . 22
C.2 Reagents . 22
C.3 Apparatus . 22
C.4 Procedure . 22
Annex D (informative) Environmental, health and safety precautions within
chemical/biological laboratory . 23
Bibliography . 24

European foreword
This document (prEN 47:2025) has been prepared by Technical Committee CEN/TC 38 “Biological
durability of wood and wood-based products”, the secretariat of which is held by SIS.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 47:2016.
The significant technical difference between this document and EN 47:2016 is as follows:
a) requirements for temperature and humidity were aligned with other insect test standards (5.3.1;
5.3.4; B5; B6);
b) imaging facilities for non-destructive recordings of insect tunnels inside test specimens were
generalized (5.3.13);
c) storage limitations for wood from which test specimens are to be made from were deleted (7.2).
NOTE Test results obtained according to earlier versions of this document or when the tests had started
before this version of EN 47 was published are considered as valid.

Introduction
This document describes a laboratory method of testing which gives a basis for the general assessment
of the effectiveness of a wood preservative against Hylotrupes bajulus by determination and comparison
with different classes of larvae, of the concentration at which the product prevents their survival in
totally impregnated wood of a susceptible species.
In this respect it differs from the methods specified in EN 46-1 and EN 46-2 which are intended to
determine whether a preservative applied to the surface is capable of preventing infestation of wood by
these larvae.
This laboratory method provides a criterion by which the value of a preservative can be assessed. In
making this assessment the methods by which the preservative may be applied should be taken into
account. It is further recommended that results from this test should be supplemented by those from
other appropriate tests and, above all, by comparison with practical experience.
When products which are very active at very low concentration are used, it is very important to take
suitable precautions to isolate and separate, as far as possible, operations involving chemical products,
other products, treated wood, laboratory apparatus and clothing. Suitable precautions should include
the use of separate rooms, areas within rooms, extraction facilities, conditioning chambers and special
training for personnel (see also Annex D for environmental,
...