JPH06329514A - Pest-controlling agent, its production and method for controlling pest - Google Patents

Abstract

PURPOSE:To provide a pest-controlling agent having high controlling effects on insect pests, with high safety on humans and livestock, having on adverse effects on the environment. CONSTITUTION:The pest-controlling agent has active ingredient(s) contained in the extract or leachate from at least one kind of plant selected from Moringa, Marah, Momordica, Sophora, Maackia, Tinospora, Zantoxylum, Picrasma, Piper, Strychnos, Styrax and Liquid ambar. The active ingredient(s) can be extracted using a relevant solvent such as water or hydrophilic solvent. This agent has powerful controlling effect on house insect pests such as termite and sanitary insect pests.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pest control agent useful for controlling pests such as termites, a method for producing the pest control agent and a pest control method.

[0002]

2. Description of the Related Art As a pest control agent for termites, cockroaches and the like, a chemical synthetic agent having a strong insecticidal property is used. However, these agents have a high impact on human safety and the environment and on the environment, and may damage natural ecosystems.

On the other hand, pest control agents derived from natural products are also known. For example, yellowfin (Phellodendron amurense Rup
r., P. molle Nakai), the roots of Coptis japonica Makino, and the yellowfin (Phellodend)
The berberine contained in the bark of ron amurense Rupr.) is known to be a food poison for termites. But,
These components still have a small controlling effect. Further, JP-A-3-41011 discloses, as a highly safe termite control agent, a control agent containing an extract of a neem organic solvent or a water-containing solvent as an active ingredient.

[0004]

An object of the present invention is to provide a pest control agent having a high control property against pests and a method for producing the same.

Another object of the present invention is to provide a pest control agent which is highly safe for humans and animals and does not adversely affect the environment, and a method for producing the same.

Still another object of the present invention is to provide a pest control method capable of controlling pests reliably and efficiently.

[0007]

In order to achieve the above-mentioned object, the present inventors have conducted extensive studies to obtain a control agent which is plant-derived and has a high controllability against pests in consideration of the natural ecosystem. The inventors have found that a component contained in an extract or exudate of a specific plant is highly safe and has a high control effect against pests, and completed the present invention.

That is, the present invention provides the following (1) to (1
There is provided a pest control agent containing a pest control component contained in an extract or exudate of at least one plant selected from the group consisting of 2).

(1) Moringa genus (2) Marah genus (3) Momordica genus (4) Sophora (Sophora) genus (5) Maackia genus (6) Tinospora (Tinospora) Genus (7) Genus Zantoxylum (8) Genus Picrasma (9) Genus Piper (10) Genus Strychnos (11) Genus Styrax (12) Genus Liquid amber (Liquidambar) Further, in the method of the present invention, at least one plant selected from the group consisting of (1) to (12) is subjected to an extraction step or an exudation step with an extraction solvent to obtain an extract or exudation containing a pest control component. Get things.

Further, the control method of the present invention controls pests using the pest control agent.

In the present specification, the term "exudate" means not only exudates collected from the trunks of plants, but also substances that exude widely from plants. In addition, the term "controlling" against harmful insects is used to mean not only insecticidal but also repellent.

As described below, the pest control agent of the present invention contains a pest control component derived from the above-mentioned specific plant, so that it is highly safe and does not damage the natural ecosystem, and the pest control Also, it has the feature of high repellent effect.

The plants belonging to the genus Moringa (genus Wasabi) include, for example, Moringa oleifera, Moringa pterygosperma, Moringa concanensis and the like. The Moringa oleifera is a plant that grows in the Philippines and the like, and its leaves are edible.

The plants belonging to the genus Marah include, for example, Marahoreganus. Mala oreganus is a plant similar to bitter melon growing in North America and is also called the big root.

Examples of the plants belonging to the genus Momordica include Momordica charantia (Momordica charantia; bittern, bittern, pickax). Momordica carrantia is an offshore plant that is said to be edible.

Plants belonging to the genus Sophora include
Includes Sophora tonkinensis. Sophora tonkinensis is a plant that grows in China, and its root is used as a raw material for a herbal medicine "Yamazu root" that has antipyretic and analgesic effects.

Examples of plants belonging to the genus Maackia include Maackia amurense subsp. Buergeri; Markia amrenze subspecies buergheri is a plant found in Japan and is known to contain a component having a hemostatic action.

The plants belonging to the genus Tinospora include, for example, Tinospora cris.
pa) etc. are included. Chinospora crispa is a plant that grows in the Philippines and the like, and is known to contain components having a clear heat and antipyretic action.

Plants belonging to the genus Zantoxylum include, for example, Zantoxylum piperitum.
oxylum piperitum). The dried fruit of Zanthoxylam piperitum is used as a herbal medicine "sansho" and a spice having a gastric intestinal function.

The plants belonging to the genus Picrasma include, for example, Picrasma quasioides.
ma quassioides; bittern), Picrasma ailanthoides, Picrasma excelsa, etc. Piclasma quasioides is used as a raw material for the herb "Nigaki" known as a bitter stomachic.

Plants belonging to the genus Piper include, for example, Piper retrofractu.
m; Hitotsumodoki) etc. are included. Pipper retro fractum is a plant that grows in the offshore.

The plants belonging to the genus Strychnos include, for example, Strychnos nux-vomica. Strikinos nakhomika is an evergreen tree plant distributed in tropical Asia from India to Australia.
The dried fruit of the mature fruits is used as a herbal medicine "Homika" as a tonic stimulant.

Plants belonging to the genus Styrax include, for example, Styrax benzides.
zoides), Styrax tonkinensis (Styrax ton)
kinensis), Styrax benzoin (Styrax benzo)
in), Styrax sumatranu
s) etc. are included. The resin "benzoin" exuding from the trunks of these plants is used for perfumes, cosmetics, etc., in addition to crude drugs having an expectorant action.

Examples of plants belonging to the genus Liquid amber include Liquid amber orientalis and liquid amber.
Includes "Liquidambar styraciflua". A resin collected from the bark of Liquid Amber orientalis or the like is used as a herbal medicine "Liquid Sogo" having an expectorant action.

The extract can be obtained by a conventional method. For example, the plant is subjected to a treatment such as shredding, drying, crushing, etc., if necessary, and then extracted with a suitable extraction solvent under normal pressure or pressure, room temperature or under heating, and if necessary. The extract can be obtained by filtering and then concentrating. The plants can be used for extraction by mixing one kind or two or more kinds.

The part of the plant to be extracted may vary depending on the type of plant, but may be the whole plant, or a part of the plant, such as roots, stems, leaves, fruits, seeds, pericarps,
It may be bark, trunk, branch, flower or the like. For example, (1)
Moringa genus, (2) Marah genus,
The plants of the genus (4) Sophora and the genus (5) Maackia can be subjected to the extraction step, for example, with a root or a stem close to the root. In addition, in (3) plants of the genus Momordica, for example, fruits and the like, (6) plants of the genus Tinospora usually have stems, and (7) Zantoxyl.
For plants of the genus um), fruits, pericarp, etc. can be usually subjected to the extraction step. Furthermore, (8) Picruma (Picr
Asma) plants include, for example, stems, (9) plants belonging to the genus Piper, for example, whole plants, and (10) plants belonging to the genus Strychnos, such as seeds. Can be subjected to the extraction step, respectively. (11) For the plant of the genus Styrax, for example, the trunk may be subjected to the extraction step, and for the plant of the genus of (12) Liquid amber, for example, the bark may be subjected to the extraction step.

(11) Styracus and (12)
In liquid Amber plants, if necessary,
Exudates from these plants, such as "benzox" and "fluid scent", can also be subjected to the extraction step.

Examples of the extraction solvent include water; alcohols such as methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, sec-butanol, t-butanol, n-octanol and cyclohexanol. Ethyl ether, propyl ether, isopropyl ether, dimethoxyethane, cyclic ether (eg, dioxane, tetrahydrofuran, etc.), mono- or dialkylene glycol monoalkyl ether (eg, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether,
Ethers such as diethylene glycol monoethyl ether); ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone; esters such as ethyl acetate, butyl acetate; carbon tetrachloride,
Halogenated hydrocarbons such as chloroform, dichloromethane and 1,2-dichloroethane; Aliphatic hydrocarbons such as hexane and octane; Alicyclic hydrocarbons such as cyclohexane and cycloheptane; Aromatic such as benzene, toluene and xylene Hydrocarbons; nitriles such as acetonitrile; carboxylic acids such as formic acid and acetic acid; aprotic polar solvents such as N, N-dimethylformamide, dimethylsulfoxide and pyridine. These solvents may be used alone or in combination of two or more.

Of these solvents, the preferred extraction solvents include water, hydrophilic solvents and mixtures thereof.
The preferred hydrophilic solvents include linear or branched chain alcohols having about 1 to 4 carbon atoms; ethers such as dimethoxyethane, cyclic ethers, mono- or dialkylene glycol monoalkyl ethers; ketones such as acetone; nitriles Organic carboxylic acids; aprotic polar solvents and the like are included.

Particularly preferred solvent is water; carbon number 1 to 4
A straight or branched chain alcohol, a water-soluble solvent such as acetone; and a mixture thereof.

The amount of the extraction solvent used may be within a range that does not impair the extraction efficiency and the extraction operation. For example, 50 to 10000 parts by weight per 100 parts by weight of the plant to be extracted,
It is preferably about 100 to 2000 parts by weight. The extraction temperature is, for example, 0 to 150 ° C., preferably room temperature to 120.
It is about ℃.

The exudate in the present invention can also be obtained by a conventional method. For example, a part of a plant body, for example, a tree trunk or the like is scratched, exudates such as resin are collected, or the plant body or a part thereof is subjected to hot water treatment or the like as necessary, and then squeezed. The exudate can be obtained by collecting the extract. In addition, in the present invention, not only exudates thus separated from the plant, but exudates exuded from the plant body or a part thereof can be used. For example,
Exudates may exude from plants that have been crushed or dried. Such exudate is also included in the "exudate" in the present invention.

Examples of the exudate of the plant include (1
In many cases, 1) “benzox”, which is exudate from a plant of the genus Styracus, and (12) “fluxed incense”, which is an exudate from a plant of the genus Liquid Amber.

In the present invention, extracts of two or more kinds of plants may be mixed with each other, or exudates may be mixed with each other,
Moreover, the extract and the exudate may be mixed. The extract and exudate may be liquid, solid such as powder and granules, or semisolid such as paste. The extract and exudate contain a pest control component having a high control action against pests. Moreover, since the pest controlling component is a natural product and is derived from a plant used as an edible or crude drug, it is generally safe for humans and animals, and has little adverse effect on the environment.

The pest control agent of the present invention is not particularly limited in the form of its formulation as long as it contains the above components, and may be the extract or exudate itself. The pest control agent may be formulated. As the above-mentioned formulation form, for example, a solution, a wettable powder, a suspension, a dispersant, an emulsion,
Liquid agents such as oils and lotions; solid agents such as powders, granules, microcapsules, microspheres, flowable agents and foaming agents; semi-solid agents such as pastes and creams; sprays, aerosols; paints, etc. However, these can be appropriately selected according to the purpose of use and the application site. These formulations can be manufactured in conventional manner.

The above liquid preparation or semi-solid preparation can be produced, for example, by diluting the above extract or exudate with an appropriate liquid diluent or carrier. In the case of a wettable powder, a solid diluent or carrier may be used.

Examples of the liquid diluent or carrier include ethylene glycol, in addition to the extraction solvents exemplified above.
Alcohols such as propylene glycol and glycerin; Plasticizers (for example, ester plasticizers such as di-2-ethylhexyl adipate); Petroleum solvents such as kerosene; Aromatic hydrocarbons such as ethylnaphthalene and phenylxylylethane; A phosphoric acid ester such as 2-ethylhexylphenyl phosphate can also be used. These liquid diluents and carriers may be used alone or in combination of two or more. As the solid diluent or carrier, for example,
Examples include diatomaceous earth, mica, clay, kaolin, talc, quartz powder and bentonite. These solid diluents or carriers can also be used alone or as a mixture of two or more kinds.

The solid preparation can be produced, for example, by diluting or granulating the extract or exudate with a suitable solid diluent or carrier. As the solid diluent or carrier, in addition to the solid diluents exemplified above, talc powder such as talc powder and wax stone powder, clays such as fine powder clay and mineral powder such as calcium carbonate; sulfur powder; urea powder; wood powder,
Botanical powders such as starch; various carriers commonly used for agricultural chemicals, horticultural preparations and the like can be mentioned. These solid diluents and carriers are often used as extenders. Solid diluents and carriers can also be used alone or in combination of two or more.

The aerosol can be produced, for example, by diluting the extract or exudate with a suitable solvent as necessary and filling the container with a propellant. Examples of the solvent include the solvents exemplified above. Examples of propellants include CFCs and liquefied natural gas.

The pest control agent is, if necessary, various additives, for example, antiseptic / antifungal agents, depending on the type of preparation.
Stabilizers such as antioxidants and ultraviolet absorbers; binders; resins capable of forming a film; emulsifiers, dispersants, spreading agents, wetting agents, penetrants; thickeners; flow aids; anti-caking agents. Aggregating agent;
It may contain an ultraviolet scattering agent; a water removing agent; a coloring agent and the like.

Examples of the antiseptic / antifungal agent include 3-
Bromo-2,3-diiodo-2-propenylethyl carbonate, 3-iodo-2-propynyl butylcarbamate, 2,3,3-triiodoallyl alcohol, parachlorophenyl-3-iodopropargylformal and other organic iodo compounds; Benzimidazole and benzothiazole compounds such as 2- (4-thiazolyl) benzimidazole and 2-thiocyanomethylthiobenzothiazole; 1- (2- (2 ', 4'-dichlorophenyl) -1,3-dioxolane-2- Ilmethyl) -1
H-1,2,4-triazole, 1- (2- (2 ',
4'-dichlorophenyl) -4-propyl-1,3-dioxolan-2-ylmethyl) -1H-1,2,4-triazole, α- (2- (4-chlorophenyl) ethyl) -α- (1,1 -Dimethylethyl) -1H-1,
Examples thereof include triazole compounds such as 2,4-triazole-1-ethanol.

Examples of the antioxidant include 4,4'-
Thiobis-6-t-butyl-3-methylphenol, butylated hydroxyanisole (mixture of 2-t-butyl-4-methoxyphenol and 3-t-butyl-4-methoxyphenol), p-octylphenol, mono (or Di or tri)-(α-methylbenzyl) phenol, 2,6-di-t-butyl-p-cresol (BH
T), pentaerythrityl tetrakis [3- (3,5
-Di-t-butyl-4-hydroxyphenyl)] propionate and other phenolic antioxidants; N, N'-di-2-naphthyl-p-phenylenediamine and other amine antioxidants, 2,5-di Hydroquinoline-based antioxidants such as (t-amyl) hydroquinoline; sulfur-based antioxidants such as dilaurylthiodipropionate; phosphorus-based antioxidants such as triphenylphosphite.

Examples of the ultraviolet absorber include 2-
Benzotriazole compounds such as (2'-hydroxy-5'-methylphenyl) benzotriazole and 2- (2'-hydroxy-4'-n-octoxyphenyl) benzotriazole; 2-hydroxy-4-methoxybenzophenone, Benzophenone compounds such as 2-hydroxy-4-n-octoxybenzophenone; salicylic acid compounds such as phenyl salicylate and p-t-butylphenyl salicylate; 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, 2-ethoxy. −
2'-Ethyl oxalic acid bisanilide, dimethyl succinate-1- (2-hydroxyethyl) -4-hydroxy-
2,2,6,6-tetramethylpiperidine polycondensation product and the like can be mentioned.

Examples of the binder include carboxymethylcellulose sodium salt, methylcellulose, ethylcellulose, hydroxymethylcellulose, dextrin, pregelatinized starch, polyvinyl alcohol, polyvinylpyrrolidone, sodium ligninsulfonate, potassium ligninsulfonate and the like.

Examples of the resin capable of forming a film include polyolefins such as polyethylene and polypropylene, polyvinyl acetate, polyvinyl alcohol, acrylic resin, polyvinyl chloride, styrene resin, fluororesin,
Examples include thermoplastic resins such as chlorinated polyolefins, alkyd resins, polyamides and polyesters; thermosetting resins such as phenol resins, urea resins, melamine resins, furan resins, unsaturated polyester resins and epoxy resins.

As the emulsifier, the dispersant, the spreading agent, the wetting agent and the penetrating agent, a conventional surface active agent such as an anionic surface active agent and a nonionic surface active agent can be used. Examples of the anionic surfactant include metal soaps, sulfate ester salts such as sodium alkyl sulfate, alkylbenzene sulfonate salts such as sodium alkylbenzenesulfonate,
Alkylnaphthalene sulfonates such as sodium alkylnaphthalene sulfonate [eg, Takemoto Fat Co., Ltd., trade name Newcalgen BX-C], dialkyl sodium 2-sulfosuccinate [eg, Dai-ichi Kogyo Seiyaku Co., Ltd.]
2-sulfosuccinic acid dialkyl salts such as manufactured by Neocor SW-C], polycarboxylic acid type surfactants [for example, manufactured by Sanyo Kasei Co., Ltd., trade name Toxanone GR-3]
0], α-olefin sulfonate, polyoxyethylene distyrenated phenyl ether sulfate ammonium salt [eg, Dai-ichi Kogyo Seiyaku Co., Ltd., trade name Dixsol 60A], sodium lignin sulfonate, potassium lignin sulfonate, etc. Can be illustrated. Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether [for example, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., trade name Inogen EIA-142 (EA-142)], polyoxy. Ethylene aryl ether, fatty acid polyhydric alcohol ester, fatty acid polyhydric alcohol polyoxyethylene, sucrose fatty acid ester, block copolymer of ethylene oxide and propylene oxide [eg, Sanyo Kasei Co., Ltd., trade name New Pole PE- 64] and the like.

Examples of the thickener include polyvinyl alcohol, polyacrylic acid and its salts, and the like. As a flow aid, a PAP aid (eg, isopropylphosphoric acid),
Wax, polyethylene, fatty acid metal salt, paraffin,
Examples thereof include organic lubricants such as silicone oil and inorganic lubricants such as talc. Examples of anti-caking agents include white carbon, diatomaceous earth, magnesium stearate, aluminum oxide, titanium dioxide and the like. Examples of the coagulant include liquid paraffin, ethylene glycol, diethylene glycol, triethylene glycol,
Isobutylene polymer [eg, Idemitsu Petrochemical Co., Ltd.,
Product name IP Solvent-2835] and the like.
Examples of the ultraviolet scattering agent include titanium dioxide. Examples of the moisture remover include anhydrous gypsum and a drying agent such as silica gel powder. Colorants include, for example, organic or inorganic pigments and dyes.

The pest control agent of the present invention may contain other insect repellents, pest repellents and efficacy enhancers. Examples of the other insect repellents include, for example, organophosphorus compounds such as phoxime, chlorpyrifos, fenitrothion, pyridafenthion, isofenphos; carbamate compounds such as bassa and propoxer; cyfluthrin, permethrin,
Pyrethroid compounds such as tralomethrin, fenparellate, etofenprox, Hoe-498, nitroguanidine compounds such as imidacloprid, and nitromethylene compounds can be mentioned.

The content of the pest controlling component can be appropriately selected depending on the dosage form of the pest controlling agent and the application method.
In the case of a liquid agent, a semi-solid agent or a solid agent, the concentration of the components is
In the pest control agent, as an extract or exudate of the plant,
For example, it is 0.1 to 80% by weight, preferably about 0.5 to 50% by weight. When the pest control agent is an aerosol agent, the concentration of the component in the filling material filled in the container is, as an extract or exudate of the plant, for example, 0.01 to
It is about 25% by weight, preferably about 0.05 to 15% by weight.

The pest control agent of the present invention can be applied to various pests such as house pests such as termites, sanitary pests such as cockroaches, flies, mosquitoes, flies and bed bugs. When the pest control agent is used for controlling pests, for example, house pests such as termites, it can be controlled with high efficiency even in a small amount.

In the pest control method of the present invention, the pest control agent can be applied to invasion sources or generation sources of pests such as kitchen, bathroom, living room, corners of floor, underfloor, ceiling, base, pillar, wall and soil. Should be applied. The method for applying the pest control agent includes various modes depending on the invasion source and the generation source of the pest, for example, methods such as application, spraying, immersing, pouring, mixing, and spraying. When applied to soil, the control agent can be applied by spraying on the soil surface, spraying on grooves formed in the soil, mixing with the soil, or the like. Further, the pest control agent is a synthetic resin sheet, paper, a sheet-shaped substrate such as cloth, prepared by applying, impregnating, kneading and the like to prepare a sheet agent, which is used as a place where the pest enters or occurs. Pests can also be controlled by placing or sticking them.

In the method of the present invention, the above-mentioned pest control component can efficiently kill or repel pests and significantly reduce pest damage.

[0053]

INDUSTRIAL APPLICABILITY The pest control agent of the present invention exhibits an excellent control effect against pests. In addition, since the pest control component is derived from a natural plant, it is highly safe for humans and animals and has little adverse effect on the environment.

According to the production method of the present invention, the pest control agent having the above-mentioned excellent properties can be obtained by a simple operation of extraction or exudation.

According to the control method of the present invention, pests can be controlled extremely efficiently while ensuring safety.

[0056]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited to these examples.

Example 1 A dried product of the roots and stems near the roots of Moringa oleifera collected on Luzon Island in the Philippines was made into powder, and 380 g of powder was added with 500 ml of acetone and subjected to reflux extraction for 6 hours. The obtained extraction mixture was filtered to obtain an acetone extract. Further, the extraction residue was treated in the same manner as above to obtain an acetone extract.

The two acetone extracts thus obtained were combined and then concentrated under reduced pressure with a rotary evaporator.
4 g of extract was obtained (Sample 1). Methanol was added to this extract to give a methanol solution of about 2% by weight.

Example 2 An underground tuber of Marah oreganus collected in Oregon, USA was cut, dried at room temperature, and then powdered. Acetone 1 to 25 g of this powder
The extract 1.1 was added in the same manner as in Example 1 by adding 00 ml.
g was obtained (Sample 2). Furthermore, methanol 1 is added to the extraction residue.
00 ml was added, and the same operation as above was performed to extract 3.
8 g was obtained (Sample 3).

Methanol was added to each of these extracts to prepare a methanol solution of about 2% by weight.

Example 3 Unripe fruits of bitter gourd were sliced and dried at room temperature.
It was made into powder. 200 ml of acetone was added to 50 g of this powder, and 1.6 g of an extract was obtained in the same manner as in Example 1 (Sample 4). Further, 200 ml of methanol was added to the extraction residue and the same operation as above was performed to obtain 5.2 g of the extract (sample 5).

Methanol was added to each of these extracts to prepare a methanol solution of about 2% by weight.

Example 4 Chinese radish root (commercially available) was powdered, and 300 g of this powder was used.
To this was added 500 ml of methanol, and in the same manner as in Example 1, 45 g of an extract was obtained (Sample 6). Methanol was added to this extract to give a methanol solution of about 2% by weight.

Example 5 The roots of Aedes japonicus were cut, dried at room temperature and made into powder. Methanol (1.5 L) was added to 990 g of this powder, and 160 g of extract was obtained in the same manner as in Example 1 (Sample 7). To 150 g of this methanol extract, 1 L of water and 1 L of chloroform were added, shaken well, and allowed to stand,
The chloroform layer was separated. Chloroform 1L was further added to the aqueous layer, and the same operation as above was performed. The chloroform layer was separated and combined with the previous chloroform layer. Then
1 L of n-butanol was added to the aqueous layer and the same operation was performed to separate the n-butanol layer.

The chloroform layer, the n-butanol layer, and the water layer were concentrated under reduced pressure by a rotary evaporator, respectively, and 37 g of chloroform-soluble extract, 93 g of n-butanol-soluble extract, and 12 g of water-soluble extract (Sample 8). ) Got. Incidentally, water was added to the water-soluble extract,
An aqueous solution of about 12% by weight was prepared.

Example 6 Tinospora cris from the Philippines
pa) (commercial item), dried ground stem product, and powder 1
To 70 g, 300 ml of acetone was added, and in the same manner as in Example 1, 5.9 g of an extract was obtained (sample 9). Acetone was added to this extract to give an acetone solution of about 2% by weight.

Example 7 Sansho pepper (pericarp excluding seeds, commercial product) was made into powder, and 100 ml of acetone was added to 50 g of this powder, and Example 1
In the same manner as described above, 7 g of extract was obtained (Sample 10). Methanol was added to this extract to give a methanol solution of about 2% by weight.

Example 8 A powder of the Japanese lacquer lacquer (commercial product) was added to 150 g of the powder, and 3.2 g of the extract was obtained in the same manner as in Example 1 (Sample 11). Acetone was added to this extract to give an acetone solution of about 2% by weight.

Example 9 Whole plants of Hitotsukidoki collected in Ishigaki Island, Okinawa Prefecture were dried at room temperature to give a powder. Acetone 170m to this powder 30g
4.1 g of the extract was obtained in the same manner as in Example 1 (Sample 12). Add methanol to this extract,
It was a methanol solution of about 2% by weight.

Example 10 Kampo pharmacopoeia (bago, seeds) was made into powder, and this powder 40
Acetone (150 ml) was added to g to obtain 3.5 g of extract in the same manner as in Example 1 (Sample 13). Acetone was added to this extract to give an acetone solution of about 2% by weight.

Example 11 Acetone was added to commercially available benzoin (Sample 14) to give an acetone solution of about 2% by weight.

Example 12 Acetone was added to a commercially available fluidized soy sauce (Sample 15) to prepare an acetone solution of about 2% by weight.

Test Example 1 Quartz sand passed through a 20-mesh sieve was treated at a temperature of 60 ±.
After drying at 2 ° C. to a constant weight, it was cooled to prepare a test quartz sand.

A solution containing Samples 1 to 15 obtained in Examples 1 to 12 was added to 12 g of quartz sand so that the amount of each sample was 1% by weight with respect to the quartz sand, and treated. After being volatilized, water was added to these quartz sands to make the total amount 13 g. The total amount of the aqueous solution of Sample 8 was 13 g without volatilizing water.

As a control, quartz sand treated with the addition of berberine (Comparative Example 1) and ovaknone (Comparative Example 2), which are considered to be food poisons for termites, was prepared in the same manner as above. The samples of Examples 1 to 12 are a mixture, whereas berberine and the like are pure compounds. Therefore, the added amount of berberine and obaknone was 0.1% by weight with respect to the quartz sand.

As a control, quartz sand to which water was added in the same manner as described above (Comparative Example 3, water content about 8%) was used without treatment with a chemical.

As a test device, two cylindrical glass containers (inner diameter: about 5 cm, height: 12 cm) were placed from the bottom surface by about 2 c.
At m, glass tube (inner diameter about 1.5 cm, length about 10 c
A device connected in communication with m) was used. In addition, a sliding portion for connecting with a glass container is formed at both ends of the glass tube, and a transparent portion (length 5c) at the center thereof is formed.
m) is graduated at intervals of 5 mm. Also,
The test device was used after being dried and sterilized in advance.

About 60 untreated quartz sand was placed in one glass container.
g, and the other glass container was filled with about 3 g of crushed pieces of Japanese red pine. Further, the central part of the glass tube was filled with quartz sand treated with the components of Examples 1 to 12 and Comparative Examples 1 and 2 or untreated quartz sand of Comparative Example 3, and the two glass containers were filled with this glass tube. Was connected.

On the quartz sand in one of the glass containers filled with untreated quartz sand, 200 termites (Coptotermes formosanus) collected from the nest and 20 soldier ants
I put my head in.

The test apparatus was left in a thermostatic chamber at a temperature of 28 ± 2 ° C. and a humidity of 70% or more for 3 weeks, and after 3 weeks, the progress of termites in the glass tube was observed. The test was repeated 3 times for each sample.

As a result, Samples 1 to 15 of Examples 1 to 12
When the quartz sand treated in step 1 was used, the termites did not penetrate the quartz sand layer in the glass tube at all. On the other hand, when the quartz sands of Comparative Examples 1 to 3 were used, the termites moved from the glass container filled with the quartz sands into the glass tube, and reached a point 4 cm or more of the quartz sand layer in the glass tube. Invaded As is clear from the above test results, a strong repellent effect against termites was observed when treated with Samples 1 to 15 of Examples 1 to 12.

Test Example 2 Treated quartz sand and untreated quartz sand prepared in the same manner as in Test Example 1 were spread on a petri dish (diameter 6 cm) that had been previously dry sterilized.

Ten professional termite termites collected from the nest were randomly placed on these quartz sands. Next, put each petri dish in a container containing water and set the container at a temperature of 2
It was allowed to stand in a thermostatic chamber at 8 ± 2 ° C. for 11 days, and the health condition of termites and the number of deaths were observed and recorded every day.

The results are shown in the table. In the table, a represents the number of healthy individuals, b represents the number of fallen individuals, and c represents the number of dead individuals.

[0085]

[Table 1] As shown in the table, when Samples 1 to 6 and 8 to 15 were used, a controlling effect on termites was observed. In particular, when treated with a solution containing Samples 1 to 6, 8 and 14,
A strong insecticidal effect was seen.

Claims (5)

[Claims] 1. A pest control agent containing a pest control component contained in an extract or exudate of at least one plant selected from the group consisting of the following (1) to (12). (1) Moringa genus (2) Marah genus (3) Momordica genus (4) Sophora (Sophora) genus (5) Maackia (Maackia) genus (6) Tinospora genus (7) ) Zantoxylum genus (8) Picrasma genus (9) Piper genus (10) Strychnos genus (11) Styrax genus (12) Liquid amber (Liquidambar) genus 2. The pest control agent according to claim 1, wherein the extract is an extract with water and / or a hydrophilic solvent. 3. An extract containing a pest control component, which is obtained by subjecting at least one plant selected from the group consisting of (1) to (12) according to claim 1 to an extraction step or an exudation step using an extraction solvent. A method for producing a pest control agent for obtaining exudate. 4. The method for producing a pest control agent according to claim 3, which comprises extracting with water and / or a hydrophilic solvent. 5. A pest control method using the pest control agent according to claim 1 or 2.