JPH0358561B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention has the structural formula: 3-iodo-2-propynyl N-n
- A wood preservative characterized by containing butyl carbamate and a specific organic phosphorus compound as active ingredients. (Prior Art) 3-iodo-2-propyl N-n-butyl carbamate is a compound known as a fungicide and a wood preservative. Many organic phosphorus compounds are known to be effective as insecticides or termite control agents, but few are known to be useful as wood preservatives. Generally, in buildings, a large amount of wood is used as an interior material, and many of the houses in Japan are mainly made of wood, and a large amount of wood is used as a structural material. Wood, which is used as interior or structural material, is often damaged by decay, sometimes resulting in significant losses. Various studies have been conducted to prevent wood rot, and various compounds have been developed and put into practical use as wood preservatives. It was not always satisfactory in terms of safety, etc. For example, oil-soluble wood preservatives such as phenols and organic tin compounds (e.g. tributyltin oxide) are toxic to humans and livestock, and can easily cause rashes on their skin and mucous membranes; Naphthenic acid metal salts, chlornaphthalenes, and other agents have low preservative efficacy, and water-soluble wood preservatives such as chromated copper arsenate (CCA) preservatives contain arsenic compounds, so they must be handled with great care. Care must be taken and there are problems in terms of pollution prevention. (Structure of the Invention) In view of the above-mentioned circumstances, the present inventors conducted intensive studies to develop a new wood preservative, and found that a certain type of organic phosphorus compound that has a termite control effect has a weak but effective effect on wood decay. Focusing on its activity against bacteria, 3-iodo-2-propynyl N-n-
When used in combination with butyl carbamate, it was found that the activity against wood-decaying fungi was significantly higher than when each was used alone, and based on this finding, the present invention was completed. Examples of the organic phosphorus compounds used in the present invention include the following. O,O-diethyl O-(α-cyanobenzylideneamino)thiophosphate (common name: phoxim) O,O-diethyl O-(3,5,6-trichloro-2-pyridyl)phosphorothioate (common name: chlorpyrifos) O, O-diethyl O-(3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioate (generic name: pyridafenethione) In carrying out the present invention, in order to efficiently express the wood preservative effect, 3. -Iodo-2-propynyl N-n-butyl carbamate and an organic phosphorus compound may be formulated into oils, liquids, powders, granules, wettable powders, floor pulls, etc. according to conventional methods. The mixing ratio of 3-iodo-2-propynyl N-n-butyl carbamate used here is preferably 1/10 to 3, particularly 1/3 to 1, based on the weight of the organic phosphorus compound. The wood preservative of the present invention can be used on unused wood itself in the form of an emulsion, an oil, or a wettable powder by methods such as coating, spraying, dipping, pressure injection, and diffusion. In addition, for wood used as structural materials and interior materials of buildings, it is recommended to use methods such as coating, spraying, and foaming.
When targeting areas such as under the floors of houses, spray the insecticide in powder, granule, or wettable powder form directly on the ground, or apply a diluted solution of the insecticide in powder, emulsion, sol, or wettable powder form. It is best to mix it with mountain soil and spread it evenly under the floor, or to spray or spray a diluted solution of the pest control agent in the form of an emulsion, sol, or wettable powder under the floor. Examples of solid inert carriers that can be used in the pesticidal agent of the present invention include clays (e.g. kaolin, bentonite, acid clay), talcs (e.g. talc,
pyrophyllite), silicas (for example, diatomaceous earth, calcined diatomaceous earth, silica sand, mica, synthetic silicates, synthetic highly dispersed silicic acid), pumice, inorganic mineral powders such as sand, and fine particles. Examples of liquid carriers include the following, and these may be used alone or in the form of a mixture of two or more. Alcohols (e.g. methyl alcohol,
ethyl alcohol, ethylene glycol), ketones (e.g. acetone, methyl ethyl ketone,
cyclohexanone), ethers (e.g. ethyl ether, dioxane, tetrahydrofuran,
Cellosolve, polyethylene glycol monophenyl ether), aliphatic hydrocarbons (e.g. gasoline, kerosene), aromatic hydrocarbons (e.g. benzene, toluene, xylene, solvent naphtha, cyclohexane, methylnaphthalene), halogenated hydrocarbons (e.g. dichloroethane) , chlorinated benzene, carbon tetrachloride, chloroform), acid amides (e.g. dimethylformamide, dimethylacetamide), esters (e.g. ethyl acetate), nitriles (e.g. acetonitrile, dimethyl sulfoxide), etc. In addition, examples of surfactants that can be used in the pesticidal agent of the present invention include, but are not limited to, the following, and even if these surfactants are used alone or in combination with It may be used in the form of a mixture of more than one species. Polyoxyethylene alkylaryl ether, polyoxyethylene sorbitan monolaurate, alkylaryl sorbitan monolaurate, alkylbenzene sulfonate, alkylnaphthalene sulfonate, lignin sulfonate, higher alcohol sulfate ester salt, etc. Further, examples of dispersants and adhesives that can be used in the pest control agent of the present invention include, but are not limited to, the following. casein, gelatin, starch, alginic acid, CMC,
Gum arabic, agar, polyvinyl alcohol, pine oil, sugar oil, bentonite, lignin, sulfite waste liquid, etc. (Example) Hereinafter, an example of the present invention will be described. In addition, parts indicate parts by weight. Example 1 An oil agent prepared by mixing and dissolving 3-iodo-2-propynyl N-n-butyl carbamate 0.1 part pyridafenethion 0.1 part butyl carbitol 15.0 parts white kerosene 84.8 parts. Example 2 An oil agent prepared by mixing and dissolving 3-iodo-2-propynyl N-n-butylcarbamate 0.1 part chlorpyrifos 0.3 part cyclohexanone 30.0 parts white kerosene 69.6 parts. Example 3 3-iodo-2-propynyl N-n-butyl carbamate 5 parts phoxim 5 parts ethyl acetate 40 parts xylene 40 parts A mixture of polyoxyethylene alkylphenol derivative and alkylaryl sulfonic acid 10 parts were uniformly mixed and dissolved. An emulsion. Example 4 Hydration obtained by uniformly mixing and pulverizing 3-iodo-2-propynyl N-n-butyl carbamate 10 parts chlorpyrifos 10 parts diatomaceous earth 75 parts polyoxyethylene alkyl phenyl ether and alkylaryl sulfonate 5 parts agent. Example 5 An oil agent prepared by mixing and dissolving 0.1 part of 3-iodo-2-propynyl N-n-butyl carbamate, 0.1 part of chlorpyrifos, and 99.8 parts of white kerosene. (Effects of the Invention) Next, test examples will be shown to prove the usefulness of the present invention. Test Example 1 Antibacterial activity test against wood-decaying fungi Agar medium for wood-decaying fungi (glucose 2.5%, peptone 0.5%,
Coriolus versicolor (containing 1.0% malt extract, 0.2% magnesium sulfate, and 0.3% monopotassium phosphate) was inoculated with bacterial flora of Coriolus versicolor, Tyromyces palustris, and Serpula lacrymans. At 25℃, Namidatake is
Each strain was cultured at 20°C for 5 days, the growth of the bacterial flora diameter during that period was measured, and the inhibition rate of bacterial flora growth was calculated according to the following criteria. The results are shown in Table 1. Bacterial flora growth inhibition rate (%) = AB/A x 100 [A: Bacterial flora growth on drug-free medium (bacterial flora diameter after 5 days of culture - bacterial flora diameter at time of inoculation) B: On drug-added medium Growth of bacterial flora (diameter of bacterial flora after 5 days of culture - diameter of bacterial flora at time of inoculation)]

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[Table] Test Example 2 Preservative efficacy test 1 against wood-decaying fungi Test method The test was conducted in accordance with the Japan Wood Preservation Association (JWPA) efficacy test for surface treatment preservatives. In other words, the end surface (2 x 0.5 cm) of the test piece of wood (4 x 2 x 0.5 cm piece)
coated with paint, and the other surface was coated with 1 m ² of chemical solution of a specified concentration.
After applying 110±10g per coat and letting it air dry at room temperature,
The test piece of wood was placed in a decay bottle in which various decay fungi were cultured and stored for two months under temperature and humidity conditions suitable for decay. 2 Test conditions Test wood-decaying fungi Tree species of test wood chips Decaying temperature Sterolium japonica Cedar 26°C Kawaratake Beech 26°C Namidatake Japanese red pine 20°C 3 Test results The bacterial flora attached to the surface of the test wood chips stored in a decay bottle was removed. Afterwards, it was dried and weighed, and the potency value was calculated using the following formula. Efficacy value = Average weight reduction rate (%) of untreated test specimens -
The results are shown in Table 2: average weight decrease rate (%) of treated test specimens/average weight decrease rate (%) of untreated test specimens x 100.

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Claims (1)

[Claims] 1. Structural formula 3-iodopropyl N-n-butylcarbamate and O,O-diethyl O-(α-cyanobenzylideneamino)thiophosphate,
selected from O,O-(diethyl O-(3,3,6-trichloro-2-pyridyl)phosphorothioate and O,O-diethyl O-(3-oxo-2-phenyl-2H-pyridazin-6-yl)phosphorothioate A wood preservative characterized by containing an organic phosphorus compound as an active ingredient.