EP0862512A1

EP0862512A1 - Wood-protecting agent

Info

Publication number: EP0862512A1
Application number: EP96934497A
Authority: EP
Inventors: Heinrich Poppen; Michael Pallaske
Original assignee: Remmers Bauchemie GmbH
Current assignee: Rohm and Haas Co
Priority date: 1995-09-29
Filing date: 1996-09-30
Publication date: 1998-09-09
Also published as: US6123756A; BR9610913A; AU7283196A; NZ320144A; DE19680858D2; US6248159B1; CA2233298C; KR19990063828A; KR100445863B1; JP2000505779A; CA2233298A1; AU713535B2; JP4017665B2; WO1997012736A1

Abstract

The invention concerns a wood-protecting agent, in particular for protecting wood against insects which attack dry wood, the agent being based on conventional carrier substances and auxiliary agents. The agent contains one or a plurality of insect hormones or their analogues or mimetics, in each case in a concentration of from 0.5 to 0.00005 wt %, relative to the total formulation. These substances can control the oogenesis and/or moulting and/or pupation of insects, a super-additive increase in efficiency being attained by the addition of triazole compounds.

Description

Wood preservative

description

The invention relates to a wood preservative which is particularly suitable for protecting wood against wood-destroying insects. The agent contains conventional carriers and auxiliaries and is suitable both for the preventive protection of wood and for combating an existing infestation.

To protect wood from destruction and quality deterioration by infestation with harmful organisms, in particular insect and fungal attack, chemical agents with a biocidal action against the respective harmful organism are used to a considerable extent. Insecticides which have a very non-specific mechanism of action as neurotoxins and whose potential for possible side effects in the environment are relatively large have hitherto been used against wood-destroying insects. For this reason, most of the preparations used hitherto show more or less severe disadvantages with regard to their environmental compatibility and with regard to potential side effects when used improperly.

In this situation there is a high need for environmentally compatible wood preservatives, in which the health risk for the processor and end consumer is reduced to the technically feasible minimum even when used improperly. The path that has been followed with biological or biogenic wood preservatives has so far not proven to be effective. All of the substances previously offered under the term "biological wood preservatives", which contain, for example, balsam turpentine oil and wood vinegar, were able to do so

ORIGINAL DOCUMENTS Wood preservatives do not meet the requirements. Against the main wood destroyers, the longhorn beetle (Hylotrupes bajulus), the wood worm (Anobium punctatum) and the sapwood beetle (Lyctus brunneus), it is still necessary to use highly active chemical agents.

The use of insect hormones to combat insect infestation has long been known from integrated plant protection. Analogues and mimetics of molting and pupation hormones, ie insect juvenile hormone analogues and ecdysone agonists, are used in particular here. Because of their hormone character, these agents are highly selective insect-effective even at the lowest application concentrations, the selectivity going so far that sometimes only individual insect orders (eg beetles etc.) are detected and useful insects from other orders (eg skin winged birds etc.) remain largely spared.

These agents have so far not been used in wood protection because this group of active ingredients was not yet available when the organochlorine insecticides were detached and the synthetic pyrethroids were an advantageous alternative at that time. In addition, the first generation of insect hormone analogues still had some disadvantages (high vapor pressure, hydrolysis instability) and was therefore out of the question for use in wood preservatives.

The object of the invention is to provide a wood preservative which is at least equivalent to the wood preservatives used hitherto and which meets today's requirements for environmental compatibility and toxicological harmlessness. The agent is said to have a long-lasting effect, reliable protection, in particular, against attack by wood-destroying Provide insects and the wood impregnated with them - should be reusable after the useful life of the construction or can be removed without any consequences for the environment.

This object is achieved with a wood preservative of the type mentioned at the outset, which, in each case in a concentration of 0.00005 to 0.5% by weight, based on the overall formulation, of one or more insect hormones and / or their analogs or contains mimetics that are able to control the course of egg development, molting or pupating of insects. Possibly. the agent also contains triazole compounds, in particular triazole fungicides, which bring about a synergistic effect.

According to the invention, the insect hormones juvenile hormones and ecdysone used as well as their analogs and mimetics are understood. These hormones interfere with the hormonal control systems of insects, they control embryonic development in the fertilized egg, the molting in the larval stage and induce pupation and development at the end of the larval stage. As long as the juvenile hormone is released, the insect remains in the larval stage, the individual molting being induced by additional release of ecdysone. After the juvenile hormone level has dropped at the end of the larval phase, the ecdysone release causes pupation.

The intervention of the insect hormones in the hormonal control circles can be used to control insect pests. It is known that the juvenile hormones can have an ovicidal effect. When they act on the fully developed larva, they lead to an artificial lengthening of the larval stage, to excess molting and ultimately to the death of the larva. The use of Ecdyson leads to a number of insect larvae spontaneous molting and mostly to the death of the larva. If Ecdyson and Ecdyson agonists are overdosed, premature pupation and metamorphosis to the old animal can be forced; this creates externally deformed (crippled) insects, which are also unable to reproduce. In any case, the proliferation of insects can be disturbed or prevented by targeted use of the insect hormones, be it by causing the eggs to die or by disrupting the formation of the finished insect. In addition, these insect hormones also intervene in the control loops of the finished insect, where they can cause malfunctions (chemosterilization, etc.).

In parallel to the actual juvenile hormones and ecdysons, a number of analogs and mimetics have been developed which have a comparable effect on the hormonal control circuits of insects. These are both structurally related compounds, ie derivatives of ecdysone and juvenile hormones, and chemical compounds which, despite their structural differences, have a comparable effect. The latter applies in particular to the juvenile hormones, which are known in numerous variants and for which a large number of analogs have been developed. According to the invention, the hormones themselves, ie the insect juvenile hormones and ecdysteroids, can be used alone or in combination, as can their mimetics and analogues. Care must be taken to ensure that each of the hormones or its analogs or mimetics is present in an amount which guarantees the action, ie in the range from 0.00005 to 0.5% by weight, based on the overall formulation. The concentration of each hormone or active ingredient in the formulation is preferably 0.001 to 0.05% by weight. Suitable juvenile hormone analogs according to the invention

Pyriproxyfen: 4-phenoxyphenyl- (RS) -2- (2-pyridyl-oxy) propyl ether,

Fenoxycarb: ethyl [2- (4-phenoxyphenoxy) ethyl] carbamate,

Kinoprene: 2-propynyl- (E) -3,7, ll-trimethyl-2,4-dode cadienoate,

Methoprene: isopropyl- (2E, 4E) -ll-methoxy-3,7, ll-trimethyl-2,4-dodecadienoate,

Hydroprene: ethyl- (E, E) - (R, S) -3,7,11-trimethyldodeca-

2,4-dienoate.

Of these, pyriproxyfen and fenoxycarb are preferred juvenile hormone analogs.

Possible ecdysone agonists

Tebufenozide: N-tert-butyl-N '- (4-ethylbenzoyl) propyl ether, RH-0345: (beetle-specific variant of the

Tebufenozide), RH-5849: (slightly beetle-specific variant of the

Tebufenozide, azadirachtin and azadirachtanin.

Of these, tebufenozide and RH-0345 (a coleopter-specific variant of the tebufenocide) are preferred ecdysone agonists.

Wood preservatives containing a combination of the two juvenile hormone analogues pyriproxy¬ fen and fenoxycarb are particularly preferred. The two active ingredients complement one another optimally in that fenoxycarb, in particular in the embryonic stage and in the methamorphosis, has an effect on the wood-destroying insects, while pyriproxyfen is also active during the larval stage. The combination of these two active substances is therefore able to ensure a high active substance concentration in the feeding environment of the insects to be controlled over the entire period important for insect development. In addition, fenoxycarb has a pronounced ovicidal effect on the longhorn beetle eggs.

Furthermore, the combination of at least one juvenile hormone analogue with an ecdysone agonist is particularly preferred, since this combination mimics the natural requirements for the molting of insects and forces larval molting, regardless of the state of development of the larva. The repeated, untimely molting leads to the premature death of the larva and is therefore suitable for drastically shortening the larval stages (from 2 to 12 years), which is extremely long especially for wood insects, and thereby limiting the damage caused by feeding. At the same time, the presence of the juvenile hormone prevents the development of the embryo in the egg, so that the development of the insect population is permanently disturbed and new infestation can be safely avoided.

It has also been shown that it is extremely expedient to provide the wood preservative according to the invention with a fungicide. In particular, triazole fungicides come into question which, in addition to their actual fungicidal action, develop a synergistic action together with the hormone components by increasing the action thereof or lowering the response threshold. The triazoles presumably increase the permeability of the cell membrane to these insect hormones. This allows the insect hormones to be used in consistently lower concentrations.

The known triazole fungicides are primarily considered as fungicides, for example: Propicoazole: 1- (2,4-dichlorophenyl) -4-propyl-1,3-dioxolan-2-yl) methyl) 1H-1,2,4-triazole, tebuconazole: alpha- [2- (4-chlorophenyl ) ethyl] -alpha-

(1, 1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol,

Azaconazole: 1- [2,4-dichlorophenyl) -1,3-dioxolan-2-ylmethyl] -1H-1,2,4-triazole, fenbuconazole: (RS) -4- (4-chlorophenyl) -2 -phenyl-2- (1H-

1,2,4-triazol-l-yl-methyl) butyronitrile, myclobutanil: alpha-butyl-alpha- (4-chlorophenyl) -l-

1,2,4-triazole-l-propenenitrile, triadimenol: 1- (4-chlorophenoxy) -3,3-dimethyl-1- (1H-

1,2,4-triazol-l-yl-methyl) -butan-2-ol.

These triazole fungicides are expediently present in an amount of 0.15 to 1.5% by weight, preferably 0.4 to 0.8% by weight, based on the entire ready-to-use formulation.

Also suitable are non-triazole fungicides, the same concentrations being used in the wood preservative as mentioned for the triazole fungicides. Examples include:

Nuarimol: alpha- (2-chlorophenyl) -alpha- (4-fluorophenyl) -5-pyrimi-dinmethanol,

Fenarimol: alpha- (2-chlorophenyl) -alpha- (4-chlorophenyl) -5-pyrimidinemethanol,

IPBC: 3-iodopropargyl-N-butyl carbamate,

Tolylfluanid: N'-dichlorofluoromethylthio-N, N-dimethyl-

N'-tolylsulfamide,

Dichlofluanide: N '-dichlorofluoromethylthio-N, N-dimethyl-

N'-phenylsulfamide,

TIAA: 2,3-3-triiodallyl alcohol.

In this connection, non-triazole fungicides can also be mentioned Xyligen Al: tris- (N-cyclohexyldiazeniumdioxy) aluminum,

Cu-HDO: N-nitroso-N-cyclohexyl-hydroxylamine copper, quaternary ammonium compounds, betaines: didecylpolyoxyethylammonium borate, polychlorinated hydrocarbons (PCP etc.), boron compounds (boric acid, borax, etc.),

at which the concentration in the ready-to-use formulation is about 0.1 to 10% by weight, preferably 0.5 to 5% by weight.

In addition, boron compounds usually used in wood preservation, for example boric acid or borax, as well as quaternary ammonium compounds, for example trimethyldecylammonium chloride, can be present in quantities of 1 to 50% by weight, preferably 5 to 25% by weight on the entire wording. In addition to their fungicidal and bactericidal activity, the quaternary ammonium compounds have the property of stabilizing the agents according to the invention, of keeping the active substances in aqueous suspension and of protecting them against biodegradation in the case of wood built into contact with the earth. They promote the impregnation effect and guarantee a particularly deep penetration into the wood substance, where they contribute to the immobilization of the active substances.

In addition to the active components, the agents according to the invention also contain at least one carrier in solid or liquid form, for example a diluent or solvent. Binders can also be present, as well as usual other additives.

Further, known components of the agents according to the invention can include, for example, fixing agents, Plasticizers, emulsifiers, wetting agents, solubilizers and processing agents. Various types of additives, such as pigments, dyes, anti-corrosion agents, odor correctors, pH regulators, UV stabilizers, can also be present.

The wood preservatives according to the invention can be present as concentrates or as a ready-to-use mixture. Suitable formulations for paints, impregnants, spraying agents and agents for pressure impregnation are known to those skilled in the art. The application is carried out by customary measures, such as brushing, spraying, spraying, dipping; impregnation, impregnation, pressure, vacuum or double vacuum processes can be used as impregnation processes.

Polar or non-polar organic solvents, water or mixtures of the aforementioned can be used as solvents, depending on the intended use and active ingredient or combination of active ingredients. The use of aqueous or organic-aqueous solutions, emulsions and / or suspensions for the purposes of the invention is preferred. To increase or improve the solubility of the active ingredients in the liquid carrier, it may be expedient to add emulsifiers or solubilizers.

Preferred polar organic solvents are those which contain hydroxyl, ether, keto or ester groups. Alcohols, glycols, glycol ethers, diacetone alcohol, water-insoluble polyols and their esters are particularly suitable.

Aliphatic or aromatic hydrocarbons can be used as non-polar solvents. In particular, low-volatile water-insoluble oily or oil-type solvents with an Verdun¬ stungszahl above 35 and a flashpoint of above 30 ^β C, preferably above 45 "C, is used. As such solvents suitable mineral oils or de¬ ren aromatic fractions or mineral-Lösungs¬ may solvent mixtures, preferably white spirit , Spindle oil, petroleum, turpentine oil, terpene hydrocarbons, aroma-free petroleum fractions or alkylbenzenes can be used.

In the context of the present invention, the organic-chemical binders used in the abovementioned organic solvents are soluble or dispersible or emulsifiable synthetic resins or binding drying oils, in particular binders which are composed of acrylate resin, a vinyl resin, for. B. polyvinyl acetate, a polyester resin, polycondensation or polyaddition resin, polyurethane resin, alkyd resin, silicone resin, drying vegetable or synthetic oils or physically drying binders based on a natural or synthetic resin or contain them.

In particular synthetic resins in the form of an emulsion, dispersion or solution, preferably alkyd resins or modified alkyd resins or phenolic resins, as well as hydrocarbon resins, preferably indene-coumarone resins, are used as binders. However, bitumen or bituminous substances up to 15% by weight can also be used as binders.

As an alternative to or in addition to the binder, fixatives and / or plasticizers can be used.

Anionic or cationic emulsifiers as well as emulsifier mixtures can be used as emulsifiers. the. Examples include alkyl, aryl and alkylaryl sulfonates and phosphoric acid partial esters, and also quaternary ammonium compounds.

However, nonionic emulsifiers are preferably used alone or in a mixture, for example alkyl polyglycol ethers or esters or alkylaryl polyglycol ethers or esters, alkylphenol polyglycol ethers, polyoxyethylene derivatives, carboxylic acid polyethylene glycol esters, alkylolamides, a side group-containing ethoxylated phenols, in particular ethoxylated nonylphenol, or ethoxylated fatty acids, as well as fatty acid esters of polyhydroxy compounds, in particular mono- and di-fatty acid esters of glycerol, polyglycerol or glycerol polyethylene or polypropylene glycol ethers.

The emulsifiers can be combined with wetting agents, for example those based on organic phosphoramine compounds.

In particular for the production of emulsion concentrates or water-containing wood preservatives, polar organic solvents are used, preferably those with hydroxyl, ether or keto groups. In connection with this reference is made to ethylene and propylene glycol, their oligomers and their monoalkyl ethers, in particular ethylene glycol, diethylene glycol, ethyl glycol, butyl glycol, ethyl diglycol. Diacetone alcohol is also particularly suitable.

Anion-active or cation-active, but preferably non-ionic surfactants can also be used as solubilizers, which can convert the active substances into a stable emulsion in water. Examples of anionic surfactants are alkyl, aryl and alkylarylsulfonates, and quaternary ammonium compounds for cationic surfactants. Examples non-ionic Shear surfactants are alkyl polyglycol ethers or esters and alkylaryl polyglycol ethers or esters, polyoxyethylene derivatives, ethoxylated nonylphenol, fatty acid esters of polyhydroxy compounds, such as especially mono- and di-fatty acid esters of glycerol, polyglycerol or glycerol polyethylene or polypropylene glycol ethers.

The agents according to the invention can additionally contain dyes, pigments, water-repellent agents, odor-correcting agents and inhibitors or anti-corrosion agents and the like which are known per se. As a further additive, an amino alcohol for pH regulation and / or as a co-emulsifier can be contained in the agent according to the invention, in particular mono- or diethanolamine.

For certain formulations, it may be expedient to add anti-foaming agents, such as silicone defoamers or alkyl phosphates, preferably n-butyl phosphate.

Furthermore, other additives, such as UV stabilizers, thickeners and siccatives, can be added. As siccatives, which are preferably used in combination with a binder based on a vegetable oil, preference is given to using cobalt, zinc, cerium and / or manganese octoate and / or naphthenate.

The above-mentioned diluents or diluent mixtures, if appropriate in combination with binders, additives, processing aids, dyes, color pigments, UV stabilizers, corrosion inhibitors and the like, are used as the redilver for the production of ready-to-use agents from concentrates. In addition, the wood preservatives according to the invention can contain a stabilizing agent or stabilizing agent mixture based on an aryl, alkyl or arylakyl group-bearing phenol, a bisphenol or bisphenol derivative, a bis-hydroxyarylalkane or bis-hydroxyarlyalkane derivative, a polyoxypolyphenylalkane and / or at least contain a phosphatide.

With the aid of the stabilizing agent, the active substances are kept chemically or physically stable in the wood preservative, even if the proportion of aliphatic hydrocarbons is very high.

The wood preservatives according to the invention can be in the form of a concentrate or as a ready-to-use agent, for example as a paint in the form of a glaze, in particular a colored glaze, or as a soaking agent, the ready-to-use agent containing a corresponding amount of at least one diluent and, if appropriate, further processing and additives ent.

The invention further relates to the use of the active ingredients described above for protecting technical materials, in particular wood and wood-based materials, in order to protect them from damage or destruction by harmful organisms, in particular fungi and wood-eating insects. In the context of this use, the material to be treated, in particular wood or wood material, is treated with an effective amount of the agent according to the invention.

The material to be protected is treated by applying it by known methods, such as brushing, spraying, spraying or using impregnation methods. For this purpose, the wood to be protected is treated with an amount of 50 to 1000 g, preferably 80 to 500 g, of the agent according to the invention per m ^{2 of} wood surface.

The agents according to the invention are suitable both for controlling an acute infestation and for preventive protection against insects or fungi. In the case of acute infestation, agents are preferably used which contain both a juvenile hormone analogue and ecdysone agonists. For prophylactic impregnation, however, it is generally sufficient if only one of these two active ingredient components is present in conjunction with a fungicide .

The invention is illustrated by the examples below.

General recipes

1. Impregnation LSM

Alkyd resin (e.g. linseed oil alkali) 7 - 12% by weight Shellsol AB 2 - 3% by weight

White spirit K 60 add 100% by weight

2. Primer LSM

Alyd resin (e.g. linseed oil alkyd) 12 - 16% by weight Shellsol AB 2 - 3% by weight

White spirit K 60 add 100% by weight

3. Glaze LSM

Alkyd resin (e.g. soy alkyd or similar) 16 - 22% by weight

Shellsol AB 3% by weight additives (Sicctiv, Antioxidant,

Anti-settling agent 1 - 2% by weight Inorg./Org. Pigments 0.1 - 4% by weight

White spirit K 60 add 100% by weight

4. Impregnations, watery

Self-emulsifying alkyd resin (soybean linseed oil alkyd or similar) 7 - 12% by weight Shellsol AB 2% by weight water add 100% by weight

5. Primers, watery

Self-emulsifying alkyl resin 8 - 12% by weight

Acrylate polymer 2-4% by weight

Shellsol AB 2% by weight

Butyl glycol 3 - 4% by weight

Additives (sicative, anti-settling agent, antioxidant, pH stabilizer) 2% by weight

Water add 100% by weight

6. Glazes, watery

Alydharz / Acrylat-Hybrid 16 - - 22 Gew. -%

Shellsol AB 2 wt.%

Additives (sicative, anti-settling agent, antioxidant, pH stabilizer) 3 - - 4 wt.%

Inorg./Org. Pigments 0.1 - 4% by weight

Butylglycol 4% by weight

Water add 100% by weight

7. KD impregnating agent

Self-emulsifying alkyd resin 30% by weight

Emulsifier 10% by weight Butyl diglycol 30% by weight

Water add 100% by weight

Application concentration 1: 9

The above formulations were mixed with the active ingredients or combinations of active ingredients listed below, in each case dissolved or suspended in one of the solvent components.

example 1

The impregnation LSM from frame formulation 1 was mixed with the following active ingredients:

Pyriproxyfen 0.05% by weight fenoxycarb 0.05% by weight propiconazole 0.8% by weight

The result was an impregnation which was easy to apply in the painting process and had an excellent action against goat and fungus attack.

Example 2

The impregnation LSM from frame formulation 1 was mixed with active ingredients as follows:

Pyriproxyfen 0.01% by weight tebufenozide 0.1% by weight tebuconazole 0.6% by weight

The result was an impregnation which can be applied by brushing or spraying and is particularly suitable for wooden structures which are at risk of insects and fungi. Example 3

The primer LSM of frame formulation 2 was modified as follows:

Pyriproxyfen 0.01% by weight tebuconazole 0.5% by weight

The primer can advantageously be used to treat wooden surfaces, which are then to be coated further.

Example 4

The aqueous impregnation from the formulation 4 was mixed with the following combination of active ingredients:

Fenoxycarb 0.01% by weight pyriproxyfen 0.01% by weight azadirachtin 0.5% by weight myclobutanil 1.5% by weight

A sprayable and spreadable aqueous impregnation with excellent protection against insect infestation was obtained, which can be applied by brushing, dipping or spraying on structural timber.

Example 5

Example 4 was repeated with the aqueous primer according to frame formulation 5. The aqueous primer could be applied by brushing on and provided a good primer for further coats. Example 6

The following combination of active ingredients was added to the aqueous glaze according to frame formulation 6:

Pyriproxyfen 0.01% by weight RH-0345 0.01% by weight Propiconazo1 0.6% by weight

The agent is excellently suitable as a wood preservative for existing facilities to be protected.

Example 7

The same aqueous glaze in Example 6 was made using Nuarimol as a fungicide instead of Pro piconazole.

Example 8

A wood preservative for the boiler pressure impregnation of construction timber was mixed with active ingredient 7 as follows:

Fenoxycarb 0.05% by weight

RH-0345 0.05 wt% quaternary ammonium compound 10 wt%

Propiconazole 0.4% by weight

Tebuconazole 0.4% by weight

After dilution, the impregnating agent can be used in a ratio of 1: 9 and is particularly suitable for the permanent impregnation of construction timber. Example 9

The glaze LSM of frame formulation 2 was mixed with the following combination of active ingredients:

Pyriproxyfen 0.05% by weight Azadirachtin 0.05% by weight Fenarimol 1.2% by weight

The glaze is particularly suitable for combating acute insect infestation in existing wooden structures in inhabited buildings.

Example 10

The impregnation of frame formulation 4 was mixed with the following combination of active ingredients:

Pyriproxyfen 0.05% by weight

Fenoxycarb 0.05% by weight

Propiconazole 0.08% by weight quaternary ammonium compound 10% by weight

The impregnation is particularly suitable for the treatment of existing wooden structures, for example roof trusses, to prevent infestation, but also to combat it.

Example 11

Example 10 was repeated with the following combination of active ingredients:

Pyriproxyfen 0.05% by weight Azadirachtin 0.05% by weight Fenarimol 1.0 wt% quaternary ammonium compound 12.5 wt%.

Claims

claims

1. Wood preservative, in particular for the protection of wood against insecticides which destroy dry wood, based on customary carriers and auxiliaries, characterized in that it is based, in each case in a concentration of 0.5 to 0.00005% by weight contains on the entire formulation, one or more insect hormones or their analogs or mimetics, which are able to control the egg development and / or molting and / or pupation of insects and / or insect larvae, optionally by adding a triazole compound ¬ additive increase in effectiveness is achieved.

2. Wood preservative according to claim 1, characterized gekenn¬ characterized in that it contains at least one insect juvenile hormone or a juvenile hormone analog.

3. Wood preservative according to claim 2, characterized gekenn¬ characterized in that it contains pyri¬ proxyfen or fenoxycarb as Juvenilhormonanalogon.

4. Wood preservative according to claim 3, characterized gekenn¬ characterized in that it contains pyriproxyfen and fenoxycarb in a weight ratio of about 1: 1.

5. Wood preservative according to one of the preceding claims, characterized in that it contains an ecdysone agonist.

6. Wood preservative according to claim 5, characterized gekenn¬ characterized in that it is tebufenozide, RH-0345, and / or Contains Azadirachtin.

7. Wood preservative according to one of the preceding claims, characterized in that it contains the or each insect hormone in a concentration of 0.005 to 0.001% by weight.

8. Wood preservative according to one of the preceding claims, characterized in that it additionally contains one or more fungicides.

9. Wood preservative according to claim 8, characterized gekenn¬ characterized in that the fungicide is a triazole fungicide.

10. Wood preservative according to claim 9, characterized gekenn¬ characterized in that it contains one or more triazole fungicides, selected from propiconazole, tebuconazole, azaconazole, fenbuconazole, myclobutanil and Triadi¬ menol.

11. Wood preservative according to claim 8, characterized gekenn¬ characterized in that it contains one or more non-triazole fungicide.

12. Wood preservative according to claim 11, characterized gekenn¬ characterized in that it contains one or more non-triazole fungicides, selected from Nuarimol, Fenarimol, IPBC, Tolylfluanid, dichlofluanid and TIAA.

13. Wood preservative according to one of the preceding claims, characterized in that it contains a quaternary ammonium compound and / or a boric acid derivative in an amount of 1 to 50% by weight, based on the entire formulation.

14. Wood preservative according to claim 12, characterized by a content of 5 to 25% by weight of quaternary ammonium compounds.

15. Wood preservative according to one of the preceding claims in the form of a solution or suspension in an aqueous or non-aqueous solvent.

16. Wood preservative according to one of claims 1 to 13 in the form of a dilutable concentrate.