JP2000302620A - Injurious insect repellent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an injurious insect repellent having excellent injurious insect repellent ability, high safety to human body or the environment and capable of continuing an injurious insect repelling effect for a long time by blending an extract of Wasabia japonica Matum. with a synthetic resin and molding the mixture to a platy shape. SOLUTION: This injurious insect repellent is obtained by blending an extract of an above-ground part and/or a subterranean part of Wasabia japonica Matum., preferably allyl isothiocyanate expressed by the formula: CH2=CH-CH2- N=C=S with a synthetic resin and being molded to a platy shape. Preferably, the repellent 1 is a repellent housed in a bag 2 pieced with more than one holes 4 in at least one face, and further, the holes are closed with a seal 3 and the seal 3 is peeled off in using.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a pest repellent,
Its purpose is to provide a pest repellent that has an extremely good repellent effect on pests attached to food and agricultural products, is highly safe for the human body and the environment, and can maintain the pest repellent effect for a long time. To provide.

[0002]

2. Description of the Related Art It is said that about 2,000 agricultural pests inhabit Japan, and about 300 of them are important pests to be controlled. Representative pests that attach to agricultural crops include pests that attach to rice, pests that attach to rice, pests that attach to vegetables, pests that attach to vegetables, uribae, urinomeiga, aphids, and pests that attach to fruit trees. Bean beetles, stink bugs, and the like, which are insect pests associated with haste and legumes, are known.

[0003] In general, pesticides, which are a kind of agricultural chemicals, are used for controlling the above-mentioned pests. This insecticide inhibits nerve transmission, energy metabolism,
Pests can be controlled by showing effects such as inhibition of chitin biosynthesis, and typical insecticides include organochlorine pesticides, endrin, heptachlor, and organophosphate pesticides. , MPP agent, MEP agent, E
CP agent, carbamate insecticide, CPMC agent, M
Examples thereof include methyl bromide, methyl iodide, and chlorpicrin, which are TMC agents, carbanolates, and fumigants.

[0004] However, insecticides have a problem that they have low safety to the environment and the human body and also exterminate insects and microorganisms useful for agricultural production living in the fields.

[0005] On the other hand, pests are easily attached to crops after harvesting. It is known that the terrestrial beetle, the beetle locust, etc. can be entrapped. To control these pests, grain warehouses use fumigants such as chlorpicrin and methyl bromide. However,
Like the insecticide, the fumigant has a problem of low safety to the human body and the environment.

[0006] Repellents, which are agents that prevent insects from approaching crops and foods by using odors that insects dislike, have been used. Unlike insecticides and fumigants, repellents do not have insecticidal activity, so when used in place of insecticides, they do not exterminate useful insects and microorganisms that live in the fields. Examples thereof include β-naphthol agents, cycloheximide agents, coal tar agents and the like.

In general, when the above-mentioned pest repellent is used for agriculture, it is often sprayed directly on agricultural crops as a powder or liquid, and when it is used in a grain warehouse or a household rice bin, Often processed into granules, etc., are wrapped with a permeable packaging material for use.

[0008]

However, the above-mentioned pest repellent has the following problems. That is,
Conventionally used pest repellents have low safety to the human body and the environment, and their pest repellency has not been sufficiently satisfactory. Furthermore, in the method of spraying as a powder or liquid, although an excellent repellent effect is exhibited immediately after spraying, the repellent effect is weakened immediately and the repellent effect against insect pests cannot be maintained for a long time. In addition, even if a pest repellent processed into granules or the like was used, the repellent effect against the pest gradually weakened over time, and the repellent effect having almost the same strength as the initial one could not be maintained for a long time. .

Therefore, it has excellent pest repellent ability,
It has been desired to create a pest repellent which has high safety to the human body and the environment and can maintain the pest repellent effect for a long time.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and the invention according to claim 1 is directed to above and / or below ground of wasabi (Wasabia japonica Matsum.). Part of the extract is kneaded with the synthetic resin,
The invention according to claim 2 relates to a pest repellent characterized by being formed into a plate shape, wherein the allyl isothiocyanate is kneaded with a synthetic resin and formed into a plate shape. The invention according to claim 3 relates to a pest repellent in a bag, wherein the pest repellent according to claim 1 or 2 is stored in a bag, wherein at least one surface of the bag has The pest repellent is characterized in that the hole is closed by a seal and the seal can be peeled off at the time of use. A pest repellent contained in a container, wherein the pest repellent according to 1 or 2 is contained in a container, wherein the container is provided with a locking portion and at least one vent hole. Agent.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An extract of wasabi (Wasabia japonica Matsum.) Is blended as an active ingredient in the pest repellent of the present invention. Wasabi (Wasabia japonica Matsu)
m.) is a Japanese perennial herb belonging to the genus Wasabi. Wasabi (Wasabia japonica Matsum.)
It grows naturally in the valley or is cultivated in a wasabi field. The leaves are rosette-shaped with several leaves on the rhizome. The leaf color is generally dark green, but some are yellow-green. The rhizome enlarges every year, differentiates flower buds in response to the low temperature in winter, and in the next spring the flower stalks grow and flower. The rhizome continues to enlarge without dying after flowering and fruiting. Wasabi (Wasabia japonica Matsum.)
Has been used as an edible plant since ancient times, and in particular, its rhizome contains a lot of pungent components. Therefore, ground rhizome is used as a spice. The pungency is caused by hydrolyzing enzyme myrosinase decomposing the glycoside sinigrin by milling, and allyl isothiocyanate represented by the following formula 2 and a small amount of isothiocyanate-se.
By c-butyl.

Embedded image

In the present invention, the above wasabi (Wasabia) is used.
japonica Matsum.) can be used in all areas, above and below the ground.
The rhizome, flower part and the like may be used alone or as a mixture. However, the rhizome is preferably used because it contains a large amount of allyl isothiocyanate and its precursor sinigrin. Further, both those in a dry state and those in a non-dry state are suitably used.

The above wasabi (Wasabia japonica Matsu)
The use form of the extract of m.) is not particularly limited, and the extract may be used as it is, or may be used as an extract by concentration or drying.

The extraction solvent used for obtaining the extract is not particularly limited, and may include Wasabi (Wasabia japonica Matsu) such as a hydrophilic organic solvent such as water or alcohol, or a mixture thereof.
Any solvent from which the active ingredient of m.) can be suitably extracted can be suitably used. Incidentally, examples of the hydrophilic organic solvent include monohydric alcohols such as methanol and ethanol, and polyhydric alcohols.

As mentioned above, wasabi (Wasabia japoni)
ca Matsum.) contains allyl isothiocyanate, and this allyl isothiocyanate has an excellent pest repellent effect, as is clear from the test examples described later. Therefore, in the present invention, it is possible to mix allyl isothiocyanate as an active ingredient. As the allyl isothiocyanate, both those derived from natural products and those synthesized are suitable.

When natural allyl isothiocyanate is used, what is extracted from a plant may be used. Plants include mustard (Brassica juncea Czern. Et Coss), black mustard (Brassica nigra Koch.), Wasabi (Wasabia japo)
nica Matsum.), etc., and any plant containing allyl isothiocyanate or its precursor sinigrin can be suitably used. Particularly, wasabi (Wasabia japonica Matsum.) Is preferably used because it is easily available.

The above wasabi (Wasabia japonica Matsum.)
By kneading the extract or allyl isothiocyanate with a synthetic resin and molding the mixture into a plate, the pest repellent according to the present invention can be obtained.

Examples of the synthetic resin include a phenol resin, a xylene resin, an unsaturated polyester resin, an epoxy resin, a polyurethane resin, a polyethylene resin, and a polystyrene resin, but are not particularly limited.

The content of wasabi (Wasabia japonica Matsum.) Extract or allyl isothiocyanate is not particularly limited, but in the case of a pest repellent in which the extract is used, the content is 30 to 30% in the total composition. 60% by weight,
When allyl isothiocyanate is used, it is preferably contained so that its content is 5 to 20% by weight in the whole composition.

The shape, size, and thickness of the plate are not particularly limited, and may be appropriately adjusted according to the place where the pest repellent is used and the duration of the repellent effect.

The pest repellent obtained by the above method may be used as it is, but may be stored in a bag or a container for use. When the bag is used and stored in a bag (2) provided with at least one hole (4) covered with a seal (3) on the surface as shown in FIG. The volatilization of the active ingredient can be prevented, and as shown in FIG. 2, the active ingredient can be easily volatilized by peeling off the seal (3) at the time of use. Furthermore, by adjusting the number of peelings of the seal (3) according to the place of use and the repellent effect on the pests, the volatile amount of the active ingredient of the pest repellent can be adjusted. In actual use, if the repelling ability is weak while confirming the repelling effect on pests by opening one or two places, it is preferable to gradually increase the number of peelings and increase the volatilization amount of the active ingredient. Further, even when the repelling effect is weakened by continuing to use, the same repelling effect as at the beginning can be maintained by increasing the number of peelings.

The material of the bag (2) is not particularly limited. However, it is preferable to use a metal-deposited sheet such as an aluminum foil because it is excellent in strength and prevention of volatilization of an effective component when not used.

The size and shape of the bag body (2) are not particularly limited, and may be appropriately adjusted according to the size and shape of the plate to be stored.

When the bag (2) as described above is used, the hole (4) may be provided on only one side of the bag (2) or on both sides. Further, the number and size of the holes (4) are not limited, and may be set as appropriate according to the size of the bag (2). For example, in the case of a bag having a size of 12 cm × 20 cm, 2 to 10 holes having a diameter of about 6 mm may be provided on both sides.

The plate-like pest repellent may be stored and used in a container (7) provided with a locking portion (5) and a vent hole (6) at the top as shown in FIG. By being used in such a container (7), the locking portion (5)
It can be used by being hooked to a hook on a wall or a ceiling by using, for example, so that the pest repellent can be prevented from coming into contact with agricultural products or food. In addition, when used for vegetable cultivation using shelves such as grapes, apples and other fruit trees, cucumbers, and eggplants, locking portions (5) are also provided at places where the pest repellent effect cannot be attained by merely placing a pest repellent on the ground. ), The pest repelling effect can be sufficiently exerted only by engaging the hook with a shelf or the like. Note that the shape of the locking portion (5) is not limited to the illustrated example, and a hook or the like may be attached to the upper portion of the container (7) to form the locking portion (5), which may be used by hanging it on a ceiling or the like. .

The shape and size of the container (7) are not particularly limited, and may be suitably adjusted according to the size and shape of the pest repellent contained therein.

The shape of the ventilation hole (6) is not particularly limited, and is shown in FIG.
In addition to the circle as shown in the above, an ellipse, a square, and the like can be exemplified, and it can also be provided in a comb shape, a stitch shape, or the like. The location, number, and size of the ventilation holes (6) are not particularly limited.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. However, the present invention is not limited to these examples.

Example 1 Allyl isothiocyanate oil was added to a polyurethane resin in an amount of 10% by weight and formed into a plate having a width of 8 cm, a length of 15 cm and a thickness of 0.5 cm. A pest repellent was obtained.

Example 2 Wasabi (Wasabia japonica M)
Atsum.) rhizome was ground, immersed in 70% ethanol at 5 ° C. for about 10 hours, and filtered. After repeating this several times, the obtained extracts are combined and concentrated under reduced pressure,
47 g of the obtained extract was formed into a plate in the same manner as in the above method to obtain the insect repellent of Example 2.

(Comparative Example) A polyurethane resin having a width of 8 cm
It was shaped into a plate so as to have a length of 15 cm and a thickness of 0.5 cm to obtain a pest repellent of a comparative example.

(Test Example 1) A bag made of aluminum foil (aluminum vapor-deposited paper) having five holes each having a diameter of 6 mm on one surface and sealing the holes with a seal was prepared. 2
Alternatively, the pest repellent of Comparative Example was stored. Next, width 100
An acrylic case having a length of 500 cm, a length of 500 cm and a height of 50 cm was prepared. FIG. 4 is a top view of the acrylic case, and the inside is freely movable. At the end of the acrylic case (the location indicated by F in FIG. 4), put the bag 5
The pest repellents of Examples 1 and 2 or Comparative Example, which had been opened at four locations, were placed with the open side facing up, and 100 black elephants were released into the acrylic case. Three days later, the distribution number and lethal number of the black elephant worm in the acrylic case were counted. The temperature inside the acrylic case was kept at 30 ° C., and when counting the number of distributions and the number of lethals, as shown in FIG.
m, a length of 100 cm, and a height of 50 cm were divided into five sections (A to E), and each section was counted. Table 1 shows the test results.

[Table 1]

Next, the pest repellents of Examples 1 and 2 or Comparative Example were housed in the container shown in FIG. 3 having three circular vents of 1 cm in diameter on the surface, and the same test as above was carried out. went. Table 2 shows the test results.

[Table 2]

From the results shown in Tables 1 and 2, when the pest repellent of Example 1 was used, 77 to 79 black elephants were distributed in E, which was farthest from the repellent, and the pest repellent of Example 2 was used. When the agent was used, 72 to 74 black-and-white worms were distributed in E farthest from the repellent, and the pest repellents of Example 1 and Example 2 both had excellent pest repellency. You can see that. In addition, when the plate of the comparative example was used, the black elephant worm was distributed in the acrylic case approximately at an average, and it was found that it did not have the insect repellent ability. Furthermore, since the survival numbers of the mosquito worms when the pest repellent of the example was used and when the pest repellent of the comparative example was used, the pest repellents of Example 1 and Example 2 were It can be seen that it has no function. That is, wasabi (Wasabia japoni
ca Matsum.) The extract and allyl isothiocyanate do not show an insecticidal effect but have an excellent insect repellent ability, and can be said to be usable as an insect repellent.

(Test Example 2) Three adjacent greenhouses having a width of 2.5 m, a length of 10 m, and a height of 2.5 m were placed on three adjacent greenhouses.
Fifty cabbage seedlings were planted each, and the pest repellents of Example 1 and Example 2 stored in the bag used in Test Example 1 were separately planted in separate greenhouses, for a total of five at 2.5 m intervals. , And the remaining greenhouse was used as a control without pest repellent. The temperature in the plastic greenhouse was kept at 30 ° C., and the bag of the insect repellent was opened at three places and the opening face was placed upward. Fifty days later, the cabbage leaves were scored for the damage caused by insects, such as mites and aphids, in the following five stages for each seedling. Leaf damage status 1 ・ ・ ・ No pest damage 2 ・ ・ ・ Approximately 25% of leaves are damaged by pests 3 ・ ・ ・ Approximately 50% of leaves are damaged by pests 4 ・ ・ ・ Approximately 75% of the leaves are affected by pests 5 ・ ・ ・ Most leaves are affected by pests

The results of calculating the average value of the 50 seedlings are shown in Table 3.
Shown in

[Table 3]

As is clear from the results in Table 3, damage to cabbage leaves caused by pests in a greenhouse using the pest repellent according to the present invention is significantly reduced as compared to a greenhouse not using the pest repellent. I understand. That is, the wasabi (Wasabia japonica Matsum.) Extract and the allyl isothiocyanate-containing pest repellent can exhibit excellent pest repellent ability against pests attached to agricultural crops, and are effectively used as agricultural pest repellents. It can be said that it is possible.

The pest repellent used in Test Example 2 was left in a greenhouse for 50 days.
Further, the bag was opened in two places and the same experiment was performed again. As a result, substantially the same pest repellent effect as in Test Example 2 could be confirmed. That is, it can be said that the wasabi (Wasabia japonica Matsum.) Extract and the allyl isothiocyanate-containing pest repellent can maintain the pest repellent effect for a long period of 5 months or more.

[0039]

As described in detail above, according to the first aspect of the present invention, an extract of wasabi (Wasabia japonica Matsum.) Above and / or below ground is kneaded with a synthetic resin and formed into a plate. The invention according to claim 2 relates to a pest repellent characterized by comprising an allyl isothiocyanate kneaded with a synthetic resin and formed into a plate shape. Demonstrates an excellent pest repellent effect over a long period of time, and can be used as an agricultural pest repellent or food pest repellent,
In addition, since it is derived from plants, it has an excellent effect of high safety to the human body and the environment.

According to a third aspect of the present invention, there is provided a pest repellent contained in a bag, wherein the pest repellent according to the first or second aspect is stored in a bag, wherein at least one side of the bag has at least one side. Is provided, and the hole is further closed with a seal, and is related to a pest repellent characterized in that the seal can be peeled off at the time of use, so that the seal is peeled off at the time of use Thereby, an excellent effect that the volatilization amount of the active ingredient can be adjusted is exhibited.

According to a fourth aspect of the present invention, there is provided a pest repellent in a container, wherein the pest repellent according to the first or second aspect is contained in a container, wherein the container has a locking portion and one or more through holes. Since the present invention relates to a pest repellent characterized by being provided with pores, it can prevent foods and agricultural products from directly touching the pest repellent, and can be used by being hooked to a hook or the like on a ceiling or the like. By itself, an excellent effect that the pest repellent effect can be sufficiently exerted over a wide range is exhibited.

[Brief description of the drawings]

FIG. 1 is a view showing a state where a pest repellent formed in a sheet shape is stored in a bag.

FIG. 2 is a diagram showing a state in which a pest repellent formed in a sheet shape is stored in a bag, and a seal of the bag is peeled off.

FIG. 3 is a view of a container provided with a locking portion.

FIG. 4 is a top view of the acrylic case used in Test Example 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pest repellent 2 ... Bag 3 ... Seal 4 ... Hole 5 ... Locking part 6 ... Vent hole 7 ... Container

Claims (4)

[Claims] 1. A pest repellent, wherein an extract of wasabi (Wasabia japonica Matsum.) Above and / or below ground is kneaded with a synthetic resin and formed into a plate shape. 2. A pest repellent, wherein an allyl isothiocyanate represented by the following formula 1 (formula 1) is kneaded with a synthetic resin and formed into a plate. Embedded image 3. A pest repellent contained in a bag, wherein the pest repellent according to claim 1 or 2 is stored in a bag, wherein at least one surface of the bag is provided with one or more holes, The pest repellent is further characterized in that the hole is closed by a seal so that the seal can be peeled off during use. 4. A pest repellent in a container, wherein the pest repellent according to claim 1 or 2 is stored in a container, wherein the container is provided with a locking portion and at least one vent hole. A pest repellent characterized by that: