WO2015105128A1 - Bed bug repellent, bed bug repellent composition, and bed bug repelling method - Google Patents

Abstract

Provided is a bed bug repellent composed of a silicon dioxide powder having an oil absorption of 35 mL/100g or more. Also provided is a bed bug repellent composition comprising the bed bug repellent. Also provided is a bed bug repelling method wherein the bed bug is contacted with the silicon dioxide powder having an oil absorption of 35 mL/100g or more.

Description

Bed bug control agent, bed bug control composition, and bed bug control method

The present invention relates to a bed bug control agent, a bed bug control composition, and a bed bug control method.

Conventionally, repellents containing N, N-diethyltoluamide (DEET) and the like are known as means for protecting themselves from blood-sucking pests such as bed bugs (see, for example, Patent Document 1 below). However, bedbugs have a high growth rate and are resistant to hunger, and can survive for months to up to a year or more without being fed. Therefore, repelling bed bugs is not enough, and it is desired to kill them. In addition, bed bugs are mainly active at night, and during the day they are not visible to the back of carpets, tatami rims, furniture (bed frame, chiffon, etc.), baseboard support, closets, wall gaps, etc. Because it lives in indoor dark places, it is difficult to identify the habitat and to contact a sufficient amount of insecticide. Therefore, it is difficult to completely eliminate bed bugs with insecticides.

Japanese Patent Laid-Open No. 8-198708

In the control of bed bugs, a method using a pesticide containing an insecticidal component such as a pyrethroid compound may be considered. However, the development of resistance is a problem for insecticidal components such as pyrethroid compounds. In addition, in view of higher safety, there is a demand for extermination of bed bugs without using such insecticidal components.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a bed bug repellent, a bed bug repellent composition, and a bed bug repelling method capable of controlling bed bugs without using insecticidal components. .

The bed bug repellent according to the present invention is made of silicon dioxide powder having an oil absorption of 35 mL / 100 g or more.

According to the bed bug control agent according to the present invention, bed bugs can be controlled without using an insecticidal component. The reason why such an effect is obtained in the present invention is unknown in detail, but the present inventors presume as follows. That is, when the bed bug repellent according to the present invention comes into contact with bed bugs, body surface components such as fatty acids and waxes on the body surface of bed bugs are taken away by the silicon dioxide powder. Therefore, it is presumed that the barrier function of the body surface of the bed bug is lost, and the bed bug cannot hold water necessary for survival. And by using the silicon dioxide powder which has the predetermined oil absorption amount of this invention, it is estimated that the body surface component of bed bug can be taken away efficiently and bed bug can be exterminated.

The bed bug control composition according to the present invention contains the bed bug control agent. According to the bed bug control composition according to the present invention, the bed bug can be controlled without using an insecticidal component, like the bed bug control agent according to the present invention.

The bed bug extermination method according to the present invention is an extermination method in which silicon dioxide powder having an oil absorption amount of 35 mL / 100 g or more is brought into contact with bed bugs. According to the bed bug control method according to the present invention, the bed bug can be controlled without using an insecticidal component, like the bed bug control agent according to the present invention.

According to the present invention, bed bugs can be controlled without using an insecticidal component. Therefore, there is no fear of developing resistance to the insecticidal component, and bed bugs that are already resistant to the insecticidal component can be exterminated. Moreover, according to this invention, use for bed bug control of the silicon dioxide powder whose oil absorption amount is 35 mL / 100g or more can be provided. ADVANTAGE OF THE INVENTION According to this invention, use for bed bug control of the composition containing the silicon dioxide powder whose oil absorption is 35 mL / 100g or more can be provided.

It is drawing for demonstrating the test method in an Example.

Hereinafter, embodiments of the present invention will be described in detail.

(Budgeticide)
The bed bug repellent according to the present embodiment is made of silicon dioxide (also referred to as silica or anhydrous silicic acid) powder having an oil absorption of 35 mL / 100 g or more.

The oil absorption amount of the silicon dioxide powder is preferably 40 mL / 100 g or more, more preferably 90 mL / 100 g or more, and further preferably 110 mL / 100 g or more, from the viewpoint of improving bed bug extermination efficiency. Further, if the oil absorption amount is 150 mL / 100 g or more, high removal efficiency can be obtained even under high humidity conditions, and if the oil absorption amount is 200 to 300 mL / 100 g, it is high over a long period even under high humidity conditions. Exterminating efficiency is obtained. If the oil absorption of the silicon dioxide powder is 500 mL / 100 g or less, a sufficient bed bug control effect can be easily obtained. The oil absorption of the silicon dioxide powder may be 1000 mL / 100 g or less, 500 mL / 100 g or less, or 400 mL / 100 g or less. When the amount of oil absorption exceeds 1000 mL / 100 g, the strength of the silicon dioxide powder is lowered, and the crushed powder rises during use, and the usability may deteriorate. The oil absorption of the silicon dioxide powder can be measured by a method based on, for example, JIS K5101, ASTM D2414, ISO4656.

The silicon dioxide powder is preferably amorphous from the viewpoint of easy control of oil absorption and specific surface area. The silicon dioxide powder may aggregate to form aggregated particles. The average particle diameter of the silicon dioxide powder (mainly aggregated particles) can be measured, for example, by a Coulter counter method (Coulter multisizer method). The average particle diameter of the silicon dioxide powder is preferably 2 μm or more from the viewpoint that the powder is sufficiently in contact with bed bugs and easily takes away body surface components such as wax from the body surface of bed bugs. In addition, the average particle diameter of the silicon dioxide powder is preferably 2 μm or more, more preferably 10 μm or more, and even more preferably 20 μm or more from the viewpoint of being difficult to disperse when sprayed with a pesticide. 90 μm or more is preferable from the viewpoint of improving handling during processing. When the average particle size is 90 μm or more, the handling property is improved and the treatment with the bed bug repellent alone is facilitated. The average particle diameter of the silicon dioxide powder is preferably 500 μm or less from the viewpoint of excellent fluidity of the disinfectant and handling properties during processing. In addition, if the average particle size is 20 μm or less, it is easy to enter the body mass of bed bugs. The average particle size is preferably 90 μm or more from the viewpoint of facilitating adhesion to the entire body surface of bed bugs and improving the removal efficiency.

The silicon dioxide powder is preferably porous. The specific surface area of the silicon dioxide powder is preferably 50 m ² / g or more, and more preferably 200 m ² / g or more, from the viewpoint of improving bed bug extermination efficiency. The specific surface area of the silicon dioxide powder is preferably 800 m ² / g or less, 500 meters ² / g or less is more preferable. The specific surface area of the silicon dioxide powder may be 1000 m ² / g or less. When the specific surface area exceeds 1000 m ² / g, the strength of the silicon dioxide powder is lowered, and the crushed powder rises during use, and the usability may deteriorate. The specific surface area of the silicon dioxide powder can be measured, for example, by a method based on the BET method or ISO 5794-1.

(Combination for bed bugs)
The bed bug repellent composition according to the present embodiment contains a bed bug repellent composed of silicon dioxide powder having an oil absorption of 35 mL / 100 g or more and an optional component other than the bed repellent repellent.

In the bed bug repellent composition according to this embodiment, the content of the bed bug repellent is preferably 0.1% by mass or more based on the total mass of the bed bug repellent composition from the viewpoint of improving the bed repellent efficiency. 1 mass% or more is more preferable. When the bed bug control composition is an aerosol agent, the content of the bed bug control agent is preferably 1% by mass or more based on the whole stock solution. When the bed bug repellent is held on a solid carrier, the content of the bed bug repellent is preferably 1% by mass or more based on the whole preparation, and more preferably 5% by mass or more from the viewpoint of improving the control efficiency of bed bugs. Preferably, 20 mass% or more is more preferable. In the case of extermination by local treatment of furniture gaps and the like, the content of the bed bug repellent is preferably 0.4% by mass or more based on the whole preparation from the viewpoint of improving the fluidity and operability of the preparation.

The bed bug control composition according to the present embodiment can be used as various preparations, and a liquid or solid carrier may be used. The bed bug control composition according to the present embodiment can be formulated as, for example, a liquid agent, a gel agent, a sol agent, a granule agent, a tablet, an aerosol agent, a sheet agent, and a coating agent. Examples of the method of formulating using a carrier and the like include, for example, a method of mixing the bed bug repellent according to the present embodiment with a solid carrier, a liquid carrier, a gaseous carrier and the like, and the bed bug repellent according to the present embodiment as a solid carrier. A method of molding after mixing is mentioned. Only one type of carrier may be used, or two or more types may be used. Further, the bed bug control composition may be supported on a solid carrier and then dispersed in a liquid carrier.

Examples of solid carriers used for formulation include inorganic powders (metals such as calcium carbonate, calcium silicate, sodium sulfate, zeolite, talc, clay, bentonite, quartzite, feldspar, acid clay, diatomite powder, pumice powder, etc. Wood powder, wheat flour, resin powder (thermoplastic resin such as polypropylene, polyethylene, polyamide, polyethylene terephthalate; copolymer polyamide; copolymer thermoplastic resin, etc.), organic powder such as corn starch, silk powder, iron powder And metal powders such as aluminum powder and copper powder. The bed bug repellent may be dispersed in a powder having a particle size similar to that of the bed bug repellent, or the bed bug repellent may be supported on a powder having a particle size larger than that of the bed bug repellent.

Examples of the liquid carrier include water, alcohols such as ethanol and isopropanol; fatty acid esters such as isopropyl myristate; esters such as propylene carbonate; hydrocarbons such as normal paraffin, isoparaffin and naphthene; HFC-245fa, Asahiklin AE-3000 Hydrofluorocarbon solvents such as Asahiklin AC-6000 (manufactured by Asahi Glass Co., Ltd.); hydrofluoroether solvents such as HFO-1233zd, HFO-1234yf, HFO-1234ze, Novec7000 (manufactured by Sumitomo 3M Limited) Can be mentioned. Examples of the method for treating the liquid carrier in which the bed bug repellent is dispersed include a method of coating using an applicator such as a brush, a method of spraying using a hand pump, and a method of directly spraying from a container. . In order to disperse the silicon dioxide powder in the liquid carrier, a surfactant, a thickener or the like may be added.

Examples of the gaseous carrier include butane gas, chlorofluorocarbon gas, alternative chlorofluorocarbon gas, liquefied petroleum gas (LPG), dimethyl ether, nitrogen gas, and carbon dioxide gas. Using a sprayer using a power spreader or a venturi mechanism, a hand pump, or a sprayer for local treatment, the bed bug repellent may be directly dispersed in the gaseous carrier, and the bed bug repellent is dispersed. The liquid carrier may be jetted after mixing with the gaseous carrier.

The bed bug control composition according to the present embodiment may contain an optional component as long as the effect of the bed bug control agent according to the present embodiment is not hindered. Examples of the optional component include an insecticidal component, an attracting component, a surfactant, an antioxidant, an antiseptic, an anticorrosive agent, and a coloring agent. As an optional component, silicon dioxide powder having an oil absorption of less than 35 mL / 100 g may be used. In addition, since the bed bug control composition which concerns on this embodiment can control bed bugs, without using an insecticidal component, the bed bug control composition does not need to contain an insecticidal component.

Insecticidal components include, for example, pesticide chrysanthemum extract, natural pyrethrin, praretrin, imiprotorin, phthalthrin, allethrin, bifenthrin, resmethrin, phenothrin, ciphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenvalerate, fenproperate , Empensulin, silafluophene, transfluthrin, metofluthrin, profluthrin and other pyrethroid insecticides; fenitrothion, diazinon, marathon, pyridafenthion, prothiophos, oxime, chlorpyrifos, dichlorvos and other organophosphorus insecticides; Carbamate insecticides; oxadiazo such as methoxadiazone System insecticide; phenylpyrazole insecticides such as fipronil; sulfonamide insecticides such as amidoflumet; dinotefuran, imidacloprid, neonicotinoid insecticides such as nitenpyram; pyrrole insecticides such as chlorfenapyr like. Only one type may be used as the insecticidal component, or two or more types may be used. When the insecticidal component is used, the content of the insecticidal component is, for example, 0.1 to 50% by mass based on the total mass of the bed bug control composition.

As the attracting component, those conventionally used for pest control can be widely used. Examples of the attraction component include vegetable or animal diets such as proteins, carbohydrates, and lipids; aromatic components derived from natural products and prepared, pheromones, amino acids, nucleic acids, oils and fats, hexenals, octynals, and other unsaturated aldehydes; butyric acid Organic acids such as As an attracting component, only one type may be used or two or more types may be used. When the attracting component is used, the content of the attracting component is, for example, 0.01 to 50% by mass based on the total mass of the bed bug extermination composition.

(How to control bed bugs)
The bed bug extermination method according to the present embodiment is an extermination method in which silicon dioxide powder having an oil absorption amount of 35 mL / 100 g or more is brought into contact with bed bugs. In the bed bug extermination method according to the present embodiment, the silicon dioxide powder may be sprayed toward the bed bug, or the silicon dioxide powder may be spread over the habitat of the bed bug. In the bed bug elimination method according to the present embodiment, the silicon dioxide powder may be brought into contact with the bed bug using the bed bug elimination composition according to the present embodiment. It may be sprayed in advance on a place where the bed bug is lurking or in the vicinity thereof, on the action range of the bed bug, and may be brought into contact with the bed bug at the time of activities such as nighttime.

Application rate of the silicon dioxide powder in the bed bugs removal method according to the present embodiment (spraying concentration), from the viewpoint of sufficient disinfection effect can be easily obtained, 0.125 g / ^{m 2} or more preferably, 0.3 g / ^{m 2} or more Is more preferable, and 0.5 g / m ² or more is still more preferable. The amount of silicon dioxide powder sprayed is preferably 200 g / m ² or less in the case of local use that prevents invasion or colonization for the purpose of preventing the expansion of the habitat of bed bugs (preventive treatment). (Insecticide), 100 g / m ² or less is preferable from the viewpoint of obtaining a sufficient extermination effect. If the application amount is 200 g / m ² or less, it is possible to prevent wasteful dispersion of the preparation around the treated portion, and a sufficient extermination effect can be obtained even for bed bugs with high habitat density. When processing on the floor over the entire surface of the indoor, application rate of the silicon dioxide powder is preferably 40 g / m ² or less, to suppress the waste of the drug is effectively disinfected viewpoint from 20 g / m ² or less to more preferred.

ト Bed bugs tend to be active in high-temperature and high-humidity environments and have high resistance to drugs. In contrast, in the bed bug extermination method according to the present embodiment, for example, bed bugs can be exterminated even in an environment at a temperature of 25 ° C. and a humidity of 50% or more (for example, a mortality rate of 80% or more after 48 hours). The bed bug can be exterminated even in a high humidity environment at 75 ° C. and humidity of 75% (for example, mortality rate of 80% or more after 168 hours).

Hereinafter, the present invention will be specifically described by way of examples. However, the present invention is not limited to the following examples.

(Test 1)
Various powders shown in Table 1 below were prepared as specimens. In Table 1, Sunsphere is manufactured by AGC S-Itech Co., Ltd., God Ball is manufactured by Suzuki Yushi Kogyo Co., Ltd., Ad Solider is manufactured by Freund Sangyo Co., Ltd., and Polonex is manufactured by Maruo Calcium Co., Ltd. Is manufactured by Tomita Pharmaceutical Co., Ltd.

Apply a filter paper on the entire bottom surface of the glass waist petri dish (Φ9cm x height 6.5cm) so that no gaps for bed bugs can be made between the petri dish and the sample to be uniform over the entire bottom surface. 0.35 cm ³ was sprayed (spraying amount: about 3.0 g / m ² (about 55 cm ³ / m ² ) in Adzolider 101 having a bulk specific gravity of 90 mL / 5 g (0.056 g / mL)). Next, the petri dish was allowed to stand overnight (12 hours or more) in a sealed container in an environment of a temperature of 25 ° C. and a humidity of 50%. The waist-high petri dish was placed in a plastic case having an outer dimension of 310 mm (width) × 434 mm (depth) × 143 mm (height). The lid of the plastic case was sealed with rubber packing. The humidity in the case was adjusted to 50% using concentrated glycerin. Then, five bed bugs (Chiba series, permethrin resistance of 10,000 times or more) were tested on the petri dish, and the bed bugs were continuously brought into contact with the specimen. After testing the bed bugs, the number of lethal heads was observed over time, and the lethality was calculated. The same test was repeated again to calculate the lethality of a total of 10 bed bugs and evaluate the control effect. The results are shown in Table 1.

As is clear from Table 1, when silicon dioxide powder having an oil absorption of 35 mL / 100 g or more was used, it was confirmed that a lethality of 90% or more was achieved after 48 hours. Thus, a sufficient extermination effect of a mortality rate of 80% or more is obtained after 48 hours.

(Test 2)
Various powders shown in Table 2 below were prepared as specimens. In Table 2, OSC is manufactured by Oriental Silica Corporation, and Toxeal is manufactured by Oriental Silica Corporation. The lethality of bed bugs was evaluated in the same manner as in Test 1 except that the test environment was changed to a temperature of 25 ° C. and a humidity of 60%. For comparison, an evaluation was also performed when no silicon dioxide powder was sprayed. The results are shown in Table 2.

As is clear from Table 2, in the examples, it was confirmed that 100% mortality was achieved after 72 hours. Thus, a mortality rate of 80% or more is obtained after 72 hours. Thus, a sufficient extermination effect is obtained even under high humidity conditions of 60% humidity.

(Test 3)
Various silicon dioxide powders shown in Table 3 below were prepared as specimens. In Table 3, the fine seal is manufactured by Oriental Silica Corporation. The lethality of bed bugs was evaluated in the same manner as in Test 1 except that the test environment was changed to a temperature of 25 ° C. and a humidity of 75%. The results are shown in Table 3.

As is apparent from Table 3, in the examples, it was confirmed that a mortality rate of 80% or more was achieved after 168 hours. Thus, a sufficient extermination effect is obtained even under a very high humidity condition of 75% humidity.

(Test 4)
Adsolider 101 (Freund Sangyo Co., Ltd.) was prepared as a silicon dioxide powder. The application rate is about 0.125 g / m ² (about 2.3 cm ³ / m ² ), about 0.3 g / m ² (about 5.5 cm ³ / m ² ), about 0.5 g / m ² (about 9. 2cm ³ / ^{m 2)} and about 1.0 g / ^{m 2} (about 18.3cm ³ / ^{m 2)} example except for the change to 1-6 (application rate: about 3.0 g / ^{m 2,} temperature 25 ° C. The mortality of bed bugs was calculated in the same manner as in the case of humidity 50%, and the control effect was evaluated. For comparison, an evaluation was also performed when no silicon dioxide powder was sprayed. The results are shown in Table 4.

As is clear from Table 4, in the Examples, it was confirmed that a lethality of 80% or more was achieved after 48 hours at any application amount. Thus, it can be seen that in the case where the treatment for bed bugs cannot be performed directly, even with a drug at a low concentration that is in contact with the active period, a sufficient extermination effect can be obtained. For this reason, it is expected that a sufficient extermination effect can be obtained even for bed bugs that live in gaps where the drug is difficult to reach.

(Test 5)
About 2.7 g of each specimen (aerosol) was sprayed onto the main surface (15 cm × 15 cm) of the plywood so as to be uniform throughout, and then left still overnight (25 ° C., 12 hours or more). Next, in a sealed plastic container (sealed container with packing) in an environment of temperature 25 ° C and humidity 50%, 10 bed bugs (Chiba-based, permethrin resistance 10,000 times or more) are applied to the specimen processing surface of the plywood board. After the test, it was covered with a plastic cup (φ6 cm, height 3.5 cm), and bed bugs were forcibly contacted with the specimen for 1 hour. Thereafter, the bed bug was transferred to a clean plastic cup, and the plastic cup was allowed to stand in a sealed container in an environment of a temperature of 25 ° C. and a humidity of 50%. The mortality was evaluated by observing the number of lethal animals after 24 and 48 hours. The same test was repeated three times, and the lethality of a total of 30 bed bugs was calculated to evaluate the control effect.

As a specimen, an aerosol containing 105 mL of stock solution and 345 mL of propellant per 450 mL was used. As the constituent components of the stock solution, the components shown in Table 5 were used. Toxeal NP (manufactured by Oriental Silica Corporation) and Adsolider 101 (manufactured by Freund Sangyo Co., Ltd.) were used as the silicon dioxide powder. As the liquid carrier, normal paraffin (manufactured by Sanko Chemical Co., Ltd., trade name: neothiozole) was used. A propellant containing 52.2 mL of liquefied petroleum gas (LPG 0.15 MPa, 20 ° C.) and 47.8 mL of DME (dimethyl ether) per 100 mL was used (gas configuration (mass ratio: 20 ° C.): DME / LPG 0.15 MPa = 49.5 / 50.5). The amount of silicon dioxide powder sprayed was about 0.6 g / m ² . The results are shown in Table 5.

(Test 6)
In the center of the test area of 20 cm × 27 cm shown in FIG. 1, silicon dioxide powder (Adsolider 101, manufactured by Freund Sangyo Co., Ltd.) is sprayed in a strip shape of 5 cm × 20 cm so as to be uniform throughout (spreading amount: about 3.0 g) / M ² (about 55 cm ³ / m ² )) to form a treatment area A. In the untreated area B1 of the two untreated areas B1 and B2 between which the treated area A is sandwiched, a white paper C of 5 cm × 5 cm, which can be a hiding place for bed bugs, was placed because the bed bug prefers a narrow dark place. In an environment with a temperature of 25 ° C and a humidity of 50%, 10 bed bugs (Chiba-based, permethrin resistance of 10,000 times or more) were tested in the untreated area B2 where no black paper C was installed. Observed. The bed bug moved from the non-processing area B2 to the non-processing area B1 via the processing area A. The same test was repeated twice, and the mortality rate of a total of 20 bedbugs was evaluated. As a result, the mortality rate was 100%.

Thus, it can be seen that even when the drug cannot be processed directly against bed bugs, a sufficient extermination effect can be obtained by processing around the latent place. Furthermore, by being exposed to the drug while heading to the latent place (dark place), even when the latent place is reached, it can be lethal on the spot, thereby preventing the expansion and invasion of the habitat.

(Test 7)
Affix the filter paper on the entire bottom surface of the glass waist petri dish (Φ9cm x height 6.5cm) so that there is no gap between the bedbugs and the petri dish, Processed. In the examples, silicon dioxide powder was used as a specimen, and the amount of silicon dioxide powder sprayed was about 3.0 g / m ² (about 55 cm ³ / m ² ). As the silicon dioxide powder, Adsolider 101 (manufactured by Freund Sangyo Co., Ltd.) and Toxeal NP (manufactured by Oriental Silica Corporation) were used. In the comparative example, permethrin (insecticidal component) was used as a specimen, and permethrin was dissolved in acetone and impregnated in filter paper. The amount of permethrin treated was 100 mg / m ² (0.63 mg / dish).

Next, in a 25 ° C. and 50% humidity environment, the petri dish was allowed to stand overnight (for 12 hours or more) in a plastic airtight container, and then five bed bugs (Chiba, permethrin-resistant 10,000) The test was continuously carried out for 12 hours. Thereafter, the bed bug was transferred to a clean plastic cup, and the plastic cup was allowed to stand in a sealed container in an environment of a temperature of 25 ° C. and a humidity of 50%. The lethality was evaluated by observing the number of lethal heads after 24 hours. The same test was repeated again to evaluate the lethality of a total of 10 bed bugs. Moreover, it replaced with the resistant bed bug and tested the sensitive bed bug (Teikyo University system), and performed the same evaluation. The results are shown in Table 6.

As is apparent from Table 6, in the Examples, it was confirmed that a lethality rate of 100% was achieved after 24 hours for both resistant and susceptible bed bugs, and a sufficient extermination effect was obtained. It was confirmed.

(Test 8)
About 3.0 g of a specimen (water dispersing agent) was dropped on the main surface (15 cm × 15 cm) of the plywood so as to be uniform throughout, and then left to stand overnight (25 ° C., 12 hours or more). Next, five bed bugs (Chiba-based, permethrin resistance of 10,000 times or more) are placed on the sample processing surface of the plywood board in a plastic sealed container (sealed container with packing) in an environment of temperature 25 ° C. and humidity 50%. After the test, it was covered with a plastic cup (φ6 cm, height 3.5 cm), and bed bugs were forcibly contacted with the specimen for 1 hour. Thereafter, the bed bug was transferred to a clean plastic cup, and the plastic cup was allowed to stand in a sealed container in an environment of a temperature of 25 ° C. and a humidity of 50%. The lethality was evaluated by observing the number of lethal heads after 24 hours. The same test was repeated three times, and the lethality of a total of 15 bed bugs was calculated to evaluate the control effect.

The components shown in Table 7 were used as the constituent components of the specimen. Adsolider 101 (Freund Sangyo Co., Ltd.) was used as the silicon dioxide powder. Water and ethanol were used as the liquid carrier. The amount of silicon dioxide powder sprayed was about 3.0 g / m ² . The results are shown in Table 7.

As is clear from Table 7, even when a bed bug disinfectant dispersed with a physical force in a liquid carrier such as water or ethanol is used, a sufficient disinfecting effect is obtained.

A: Processing area, B1, B2: No processing area, C: Black paper.

Claims (3)

1. Bed bug repellent consisting of silicon dioxide powder with an oil absorption of 35 mL / 100 g or more.
2. A bed bug control composition comprising the bed bug control agent according to claim 1.
3. The bed bug extermination method of bringing a silicon dioxide powder having an oil absorption of 35 mL / 100 g or more into contact with bed bugs.
   

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