JP4440580B2 - Insect repellents for cereals and dry matter and pest control methods for cereals and dry matter pests - Google Patents

Description

  The present invention relates to an insect repellent for cereals and dry matter and a method for controlling cereal and dry matter pests using the repellent. More specifically, an insecticide for cereals and dry matter that has an excellent insecticidal effect against pests of cereals and dry matter, is highly safe for the human body, and can be easily used in ordinary households, and the insecticide The present invention relates to a method for controlling grain and dry matter pests using a chemical.

  When rice, wheat (including wheat flour), barley, legume grains, and pasta, boiled, dried food such as bonito, fufu, kanpyo (hereinafter referred to as “cereals”) are stored or stored in warehouses or general households There has been a problem that pests such as the weevil, the weevil, and the white weevil are bred and cause damage to the grains. In order to prevent damage by such pests, conventionally, grain warehouses have taken pest control measures such as fumigating the warehouse with a fumigant such as methyl bromide or phosphine and storing at low temperatures. In addition, measures such as spraying agricultural chemical components and pyrethroid compounds in these storage warehouses have been taken.

  On the other hand, in the distribution stage of grains, etc. and storage in ordinary households, the means such as those used in grain warehouses as described above are difficult to implement in terms of cost, equipment and safety. Due to the fact that cereal grains are foods, sufficient consideration was required regarding the safety of the drugs used.

  Therefore, in recent years, various insect repellents that can be used easily and safely even in general households have been proposed. For example, insect repellents for rice using wasabi, mustard, ginger, pepper, garlic and the like have been proposed. In addition, a rice quality preservative characterized by containing a spice containing allicin or capsaicin in a breathable container and storing the container together with rice in a rice container such as a rice container or a rice packaging bag (patent Various insect repellents such as a weevil repellent (Patent Document 2) containing tea tree oil and / or pine oil derived from natural products as active ingredients have been proposed.

These conventional insect repellents for cereals, etc. have no problem with safety because they use chemicals used in natural products or foods, but they are not effective against grain pests and have sufficient insect repellent efficacy. There was a problem that could not be obtained.
JP-A-6-38678 JP-A-11-222409

  Therefore, it is desired to develop a pesticidal agent for cereals and dry matter that has sufficient insect repellent effect against cereals and dry matter pests, is highly safe for the human body, and can be easily used in general households. The issue is to provide such insect repellents.

  The present inventor conducted intensive studies to solve the above problems, and found that a specific compound has an excellent insecticidal effect while being safe for the human body, and led to the present invention.

  That is, the present invention provides an insecticide for cereals and dry matter containing one or more terpene compounds as active ingredients.

  The present invention also provides a method for controlling cereals and dry matter pests, characterized by applying the pesticidal agent for cereals and dry matter to a storage or storage place for cereals and dry matter.

  The cereal / dry matter insect repellent of the present invention is safe for the human body and can be easily used in general households. Therefore, the insect repellent for cereals and dry matter of the present invention is applied to a warehouse or household storage, or a storage container for storing or storing cereals or dry matter, thereby causing pests generated on the cereal or dry matter, For example, weevil, weevil, granary weevil, etc. Coleoptera, Paramecidae, Lepidoptera, Lepidoptera, Lepidoptera, Lepidoptera, Lepidoptera, Lepidoptera, Coleoptera, Coleoptera Pests of the family, Pestidae of the Coleoptera such as Coleoptera, Pests of the order Coleoptera such as Okokunusu, Pests of the Coleoptera such as Sawworm Knu, Pests of the Coleoptera It has an excellent insect repellent effect and can protect grains and dry matter from damage.

  Moreover, it is much more effective against pests such as cereals than using plant extracts and spice powders. Furthermore, since it is a specific compound, it is easy to adjust the insect repellent effect and handle it easily.

  In particular, in the case of a gel-like preparation, problems such as the terpene compound or its solvent flowing out into the storage container for grains etc. and wetting the stored grains etc. can be eliminated. It is possible to stably volatilize the active ingredient in the storage container, and by visually observing the degree of gel reduction, it is possible to easily confirm the effect and determine the end time of the effective period.

  In the present invention, “insect protection” is a concept including an action of killing grain pests and an action of repelling pests. The term “cereals” refers to rice such as brown rice, polished rice, glutinous rice, or glutinous rice, grains such as wheat, barley, rice bran, rice bran, beans or corn, as well as their seeds or rice flour, corn starch, potato starch, buckwheat flour. Or it refers to those powders such as wheat flour. “Dried food” refers to pasta, macaroni, boiled and dried, bonito, salmon (fu), kanpyo, agar, somen, cold wheat, mushrooms, kelp, dried shiitake mushrooms, Takano tofu, dried fish, etc. Of dry food.

  The insect repellent for cereals and dry matter of the present invention contains one or more terpene compounds as an active ingredient.

  The terpene compound is not particularly limited, and examples thereof include terpene alcohol, fatty acid ester of terpene alcohol, terpene hydrocarbon, terpene aldehyde, terpene oxide, and terpene ketone.

  Examples of the terpene alcohol include linalool, terpineol, nerol, fenquil alcohol, citronellol, geraniol, and borneol.

  Examples of terpene alcohol fatty acid esters include bornyl acetate, fenkyl acetate, linalyl acetate, and terpinyl acetate.

  Examples of the terpene hydrocarbon include terpinolene, α-terpinene, β-terpinene, ocimene, myrcene, limonene, camphene, α-pinene, and β-pinene.

  Examples of terpene aldehydes include citronellal, terpene oxides include cineol, and terpene ketones include camphor.

  In addition to the above-mentioned terpene compounds, other insect pest control components may be added to the cereal / dry matter insect repellent of the present invention, whereby a further excellent insect repellent effect can be exhibited. These other pest control ingredients include pepper, wasabi, perilla, cardamom, nutmeg, cloves, coriander, sage, rosemary, basil, caraway, thyme, eucalyptus, laurel, citronella, anise, orange or lavender extract Or, essential oil, allicin, capsaicin, perylaldehyde, tea tree oil, pine oil, or alcohols having 10 or less carbon atoms such as ethanol, etc., may be used alone or in combination of two or more. You can also

  The insecticide for cereals and dry matter according to the present invention can be produced by adding a suitable carrier as required in addition to the above components and formulating it by a conventional method. The dosage form of the insecticide for grain and dry matter of the present invention is not particularly limited, and it can be in the form of a gel preparation, a liquid preparation, a solid preparation, etc. Among them, a gel preparation is particularly preferable.

  This gel-form preparation is produced by gelling a terpene compound alone or, if necessary, a solution to which another pest control component or an appropriate solvent is added together with a gelling agent and water.

  The gelling agent used here is not particularly limited, and specifically, carrageenan, alginic acid, sodium alginate, seaweed polysaccharides such as agar, fermented polysaccharides such as gellan gum and xanthan gum, guar gum, locust bean gum and the like. Examples include seed polysaccharides, hydroxyalkyl etherified polysaccharides such as hydroxypropylated guar gum and hydroxyethylcellulose, alkyletherified polysaccharides such as ethylcellulose and methylcellulose, sorbitols such as dibenzylidene-D-sorbitol, and proteins such as gelatin. These can use 1 type (s) or 2 or more types. Particularly preferred is hydroxypropylated guar gum.

  In preparing the gel preparation, the terpene compound may be dissolved in a solvent. The solvent is not particularly limited and a conventionally known liquid carrier can be used, but it is preferable to use a solvent that is highly safe for the body. For example, hydrocarbon compounds such as hexane and paraffin; methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol, 2-methyl-2-propanol, pentanol Hydrocarbon alcohols such as hexanol, heptanol, octanol, nonanol and decanol; aromatic alcohols such as aryl alcohol, benzyl alcohol and eugenol; halogenated hydrocarbon compounds such as chloroform; ether compounds such as diethyl ether and diethylene glycol diethyl ether Ketone compounds such as acetone; fatty acid compounds such as acetic acid and oleic acid; ester compounds such as acetic acid ester, propionic acid ester and benzoic acid ester; ethylene glycol, propylene Glycol compounds such as recall; Glycol ether compounds such as 2-phenoxyethanol and 3-methyl-3-methoxybutanol; vegetable oils such as sesame oil, linoleic oil, salad oil, etc., and one or more of these are mixed It can also be used.

  Furthermore, when preparing a gel-form preparation, a surfactant can be added if necessary. Examples of the surfactant include conventionally known cationic surfactants, anionic surfactants, amphoteric surfactants, and nonionic surfactants, and one of these may be used alone or 2 More than one species can be used in combination.

  Next, the liquid agent of the present invention may be a terpene compound alone or a mixed solution of this with other pest control components. Furthermore, the form which melt | dissolved them in the appropriate solvent may be sufficient.

  Although there is no limitation in particular as a dispersion medium and solvent which can be used in order to prepare a liquid agent, the thing similar to the solvent contained in water or the said gel-form preparation can be used suitably. Further, a surfactant can be added if necessary. As the surfactant, conventionally known ones can be mentioned, and one of these can be used alone, or two or more can be used in combination.

  In a liquid preparation, the concentration of the terpene compound as an active ingredient is preferably 0.1 to 100% by mass (hereinafter abbreviated as “%”) with respect to the whole insect repellent as a liquid preparation. More preferably, it is set to -100%.

  Furthermore, the pesticidal agent for cereals and dry matter of the present invention may be a solid or sheet-like solid agent obtained by impregnating or carrying the above-mentioned liquid agent on a suitable carrier. Here, the carrier to be impregnated or supported is not particularly limited, and examples thereof include wood, paper, cloth, nonwoven fabric, silica, talc, activated carbon, silica gel, zeolite, cellulose beads, ceramic and the like.

  The pesticidal and dry matter insect repellent of the present invention is more advantageous than a liquid preparation because it has no risk of the terpene compound and the like flowing out and wetting the cereal or the like. In particular, the gel-like preparation is most preferable because it has the advantage that the terpene compound can be volatilized stably and the effect can be easily confirmed from the degree of gel reduction.

  In addition to the above-mentioned components, the above-described insecticide for grain and dry matter of the present invention further includes a fragrance, a deodorant, a fungicide, a dye, a pigment, an antioxidant, an ultraviolet absorber, other insecticides, and the like. It can add suitably in the range which does not prevent the effect of this invention. Moreover, a terpene compound and other fragrance | flavor components can be mixed and added as a mixing | blending fragrance | flavor. For each of these components, it is preferable to select and use components that are safe for the human body.

  The grain and dry matter insect repellent of the present invention thus obtained is stored or stored as it is, or, if necessary, in a suitable bag or in an open container where the chemical can be volatilized. For example, it can be installed in a grain warehouse or in a domestic storage or storage container. And the active ingredient of the insect repellent for cereals and dry matter according to the present invention can exert its effect naturally or by forcibly evaporating and fumigating by means such as blowing and heating.

  EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not restrict | limited at all by these Examples.

Example 1
Gel-like grains and dry insect repellents were prepared by the following method using the terpene compounds described in Table 1 according to the following formulation. The effect of this insect repellent for grain and dry matter was examined by a test method using the following insect repellent test equipment. The results are also shown in Table 1.

<Prescription>
Component Compound Part by weight Terpene compound Terpene compound of Table 1 5
Gelling agent Carrageenan 2.5
Gelling aid Sodium chloride 0.5
Other Total remaining water 100

<Production method>
Carrageenan and sodium chloride were dispersed in water, dissolved by heating to 80 ° C. or higher, and cooled to 60 ° C. Next, a terpene compound was added, and the components were dispersed so as to be uniform while stirring. This was filled in a container without gelation and allowed to cool naturally at room temperature to prepare a gel-like insecticide for grain and dry matter.

<Insect repellent test equipment>
Evaluation was performed using the test apparatus shown in FIGS. That is, the test group 2 and the control group 3 (both of which are cylindrical cylinders made of polypropylene having an inner diameter of about 123 mm and a depth of 80 mm: NEOKEPER 890 ml (manufactured by Rastroware)) are connected to the passage pipe 4 (size: outer diameter 25 mm × length 100 mm). , 2 mm thick), so that test pests can freely travel between the two test zones. In addition, a petri dish 5 having a diameter of 4.6 cm and a spherical insect cage 6 having a diameter of 4 cm are installed in the test group 2, and a petri dish 5 having the same shape as that installed in the test group 2 is installed in the control group 3. Yes. As shown in FIG. 2, the air pipe 7 having a size of 600 mm × 200 mm (covered with cotton cloth and cannot pass through the test pests) is formed in the upper part of the passage pipe 4, so that the test section 2 The insect repellent volatilized in is not transferred to the control section 3 along the passage pipe 4.

<Insect repellent test method>
Using the test apparatus described above, first, the lids 8 of the test group 2 and the control group 3 were opened, and 2 g of rice was put in the petri dish 5 as a grain, and each was placed at the position shown in FIG. Next, the above-mentioned gel-like cereal / dry matter insecticide was cut into a size of 15 mm × 15 mm × 15 mm (1.2 g) in the insect cage 6 and installed in the test section 2. Then, a total of 20 animals were placed in each of the test group 2 and the control group 3 while anesthetizing the target pest, Noshimemadagame, with carbon dioxide. Thereafter, the lids of both sections were closed, and the test apparatus was placed in a constant temperature and humidity room of 25 ° C. × 60% RH and left in a dark room for 48 hours. After standing, the number of insecticides and the number of repellents (the number of insects in the control group 3) were counted, and the insect control rate was calculated according to the following formula (1). A similar test was conducted on the weevil.
Insect control rate (%) = ((repellent number + number of insecticides) / total number of insects input) x 100

<Result>

  As can be seen from the results in Table 1, the pesticidal and dry matter insecticides 1 to 22 using the terpene compound of the present invention have a high insect repellent rate and are excellent in the insect repellent effect against pests such as cereals. Was confirmed.

Example 2
Using the components shown in the formulation of Table 2 below, mixing was carried out by the following production method to prepare a gel-like cereal / dry matter insect repellent. The insect-proof test was performed by the following method about the obtained gel-like grain and dry matter insecticide. The results are shown in Table 3.

<Production method>
A terpene compound, a nonionic surfactant, and a pepper dye were added to ethanol and dissolved. Hydroxypropylated guar gum was added thereto and dispersed uniformly, and then water was added with stirring, and this was filled in a container to prepare the gel-like cereal / dry matter insect repellent of the present invention.

<Insect repellent test method>
Using this insect-repellent test apparatus shown in Example 1, the insect-proof test was conducted in the same manner as the insect-control test method of Example 1. As the target pests, Noshime-madagai and Bokuzoushi were used.

<Result>

  As can be seen from the results in Table 3, the insect repellent rate of the cereal / dry matter insect repellent of Example 2 was high, and it was confirmed that the insect repellent effect against pests such as cereals was excellent.

Example 3
50 g of the same gel-like cereal / dry matter insecticide as in Example 2 above is placed in a polycarbonate cylindrical container (size: 40 mm diameter, 80 mm height) with an opening on the top, and a capacity of about 22 liters (size) containing 20 kg of rice. : 240 mm × 410 mm × 225 mm) when placed in a rice storage container, the insecticidal effect was exhibited for 4 months. Further, after 4 months, the gel-like insect repellent gel was in a contracted state, and the end point of the drug efficacy could be easily determined.

  The insecticide for cereals and dry matter of the present invention exhibits an excellent insecticidal effect against pests generated on cereals and dry matter, and is safe for the human body. It can be suitably installed inside the storage container. Since it is particularly safe, it can be used as an excellent insect repellent by being suitably applied to a domestic storage container or a domestic storage container.

  In particular, in the case of a gel-like preparation, it is possible to eliminate problems such as terpene compounds flowing out into the storage container for grains, etc., and wetting the grains, etc. In addition, the active ingredient can be stably stored in the storage container. Since the end point of the action can be determined by visually observing the degree of gel reduction, it can be suitably used for insect protection for grains and dry matter.

It is the schematic of the test apparatus used for the insect-proof test. The enlarged view which looked at the pipe 4 which comprises the test apparatus of FIG. 1 from the upper direction (arrow direction of FIG. 1).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Test apparatus 2 ... Test section 3 ... Control section 4 ... Passage pipe 5 ... Petri dish 6 ... Insect basket 7 ... Air hole 8 ... ···lid
more than

Claims (6)

Geraniol, citronellol, terpineol, nerol, fenkyl alcohol, borneol, linalool, citronellal, cineol, fenkyl acetate, terpinyl acetate, bonyl acetate, linalyl acetate, camphor, α-terpinene, osymene, camphene, terpinolene, myrcene, limonene, An insecticide for cereals and dry matter against Noshimema moth , which contains one or more terpene compounds selected from the group consisting of α-pinene and β-pinene as active ingredients.   The pesticidal and dry matter insect repellent according to claim 1, further comprising other cereal and dry matter pest control ingredients. In addition, pepper, horseradish, perilla, cardamom, nutmeg, cloves, coriander, sage, rosemary, basil, caraway, thyme, eucalyptus, laurel, citronella, anise, orange or lavender extract or essential oil, allicin, capsaicin, perilla The insecticide for cereals and dry matter according to claim 2 , containing one or more selected from the group consisting of aldehyde, tea tree oil, pine oil or alcohol having 10 or less carbon atoms. 4. The cereal / dry matter insect repellent according to any one of claims 1 to 3 , wherein the cereal / dry matter insect repellent is in a gel form using a gelling agent. The pesticidal agent for cereals and dry matter according to claim 4 , wherein the gelling agent is hydroxypropylated guar gum. An insect repellent method for grain and dry matter insects, wherein the insect repellent for grain and dry matter according to any one of claims 1 to 5 is applied to a storage or storage place of the grain or dry matter.

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