JP5517884B2 - Pest control equipment - Google Patents

Description

  The present invention relates to a pest control apparatus for controlling flying insect pests such as mosquitoes, and more specifically, pest control capable of exhibiting a long-term pest control effect by heat evaporation of the insecticidal component at a low temperature for a short time. It relates to the device.

Conventionally, as a method for controlling flying insects such as mosquitoes and blood-sucking insects, pest control devices such as mosquito-removing mats and liquid-type electric mosquito-removing devices that use a heating element to heat and heat treatment chemicals containing insecticide components It has been.
These pest control devices are characterized by maintaining the control effect for a long time such as during bedtime or for a long period of several days. In order to maintain the control effect even in the past, how the insecticidal components are continuously applied. Various technologies have been developed from the viewpoint of transpiration for a long time.
For example, in Patent Document 1, a specific insecticidal component and a volatilization regulator are used, and further, the area of the mat and the area of the heat radiating plate are set to a predetermined ratio, and over a long period of 5 days or more, specifically, 12 hours. An insecticidal mat is disclosed that can maintain stable transpiration of insecticidal components even when such long-time continuous heating transpiration is carried out for 10 days.

  By the way, in recent years, due to the improvement of the sanitary environment and changes in housing conditions, especially in urban condominiums, etc., the housing has been sealed, reducing the chances of insects such as mosquitoes entering the building from outside the building. ing. For this reason, in such a living space, if mosquitoes etc. in the room are exterminated before going to bed, it is not always necessary to evaporate the insecticidal components continuously during bedtime like conventional pest control devices. Yes.

Under these circumstances, for sprays and aerosol-type insect repellents that have a transient insecticidal effect, attempts have been recently made to maintain the insecticidal effect by suppressing a decrease in the concentration of insecticidal components after spraying. Yes.
For example, Patent Document 2 mainly uses an aerosol spray method or a piezo spray method insect repellent, preferably using a room temperature volatile pyrethroid, and by using a solvent having a high vapor pressure, the particle diameter of the treatment agent is refined. It is described that the residual rate of the treatment chemical amount in air can be 1% or more between 3 hours and less than 12 hours from the start of treatment, or 0.5% or more between 12 hours and less than 24 hours from the start of treatment. Has been.

Japanese Patent No. 3286833 Japanese Patent No. 4554008

  However, the pest control method described in Patent Document 2 relates to an aerosol spray method or a piezo spray method insect repellent, and in the case of a pest control device that transpires an insecticidal component by heat energy such as a mosquito trap. The behavior of the insecticidal component of this is very different. Therefore, there is a possibility that the method described in Patent Document 2 relating to the maintenance of the insecticidal effect is not helpful for the pest control apparatus.

  Further, in the method described in Patent Document 2, it can be evaluated that a part of the amount of the treatment chemical remains in the air to some extent even after 12 hours and shows a certain insecticidal effect, but there is no room for improvement. .

  From the above, there has been no insect pest control device such as a mosquito mat or a liquid electric mosquito trap that has achieved the effect that the insecticidal effect can be maintained for a long time even if the heating time is shortened.

  Therefore, the present inventors have fundamentally reviewed the concept of the heat transpiration formulation, which has been considered to be the basis of continuous use for a long time until now, so that the insecticidal effect can be maintained for a long time even if the heating time is shortened. As a result of intensive research on the development of various pest control methods and intensive studies on the relationship between the concentration of insecticidal components in the air and the sustainability of the insecticidal effect, the use of specific insecticidal components ensures a long insecticidal effect even if the heating time is shortened. I found that it could last.

  That is, the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a pest control apparatus that can maintain the insecticidal effect for a long time even if the heating time is shortened.

In order to achieve the above object, a pest control apparatus according to claim 1 of the present invention is a pest control apparatus that volatilizes a treatment agent containing an insecticidal component into the air by heating using a heating element. As a treatment agent containing one or more compounds selected from pyrethroid compounds having a vapor pressure at 30 ° C. of 2 × 10 ⁻⁴ to 1 × 10 ⁻² mmHg, the surface temperature of the heating element is set to 70 to An atmosphere that can be heated to 150 ° C. and evaporated in a short period of time to reduce the particle size of the treatment agent containing an insecticidal component that volatilizes in the air to 1 μm or less, and can control insects for at least twice the heat evaporation time It is characterized by.

  The insect pest control apparatus according to claim 2 of the present invention is characterized in that the pyrethroid compound is one or more compounds selected from metfurthrin, transfluthrin, profluthrin and empentrin.

  The pest control apparatus according to claim 3 of the present invention is characterized in that the pest control apparatus includes control means for controlling the heating time of the heating element.

  The pest control method according to claim 4 of the present invention uses the pest control apparatus according to any one of claims 1 to 3 to provide a pest control atmosphere for a time that is at least twice the heat transpiration time. It is characterized by that.

  The pest control apparatus according to the present invention includes a treatment chemical containing an insecticidal component and a heating element as main constituent requirements. As typical examples of the pest control apparatus according to the present invention, there are a mosquito collecting mat and a liquid electric mosquito collecting.

The treatment chemical used in the present invention contains one or more insecticidal components selected from pyrethroid compounds having a vapor pressure of 2 × 10 ⁻⁴ to 1 × 10 ⁻² mmHg at 30 ° C. in the drug carrier. It has been done. Such an insecticidal component has room temperature volatility, and examples thereof include metfurthrin, transfluthrin, profluthrin, empentrin, teraleslin, and flamethrin. Among them, it is preferable to use metfurthrin, transfluthrin, profluthrin, and empentrin.
In addition, in the acid component and alcohol part of a pyrethroid compound, when the optical isomer and geometrical isomer based on an asymmetric carbon exist, it is a matter of course that these isomers and mixtures thereof are also included in the present invention.
In addition, as long as the object of the present invention is not hindered, a conventional general-purpose pyrethroid compound having a vapor pressure lower than that of the insecticidal component, for example, allethrin, praretrin, pyrethrin, or the like can be blended.

  The content of the insecticidal component in the treatment chemical used in the present invention is higher than that of the conventional treatment chemical because it is necessary to evaporate a relatively high concentration of the insecticidal component in a short time. Of course, the content of the insecticidal component per treatment agent may be appropriately determined according to the type of insecticidal component used, the set heating time, and the like. In the case of the conventional type, the content is 2.0 to 15 mg / mat, whereas in the present invention, the content is about 1 to 100 mg / mat. Is 0.1 to 2.0% by volume in the conventional type, whereas in the present invention, about 1.0 to 20% by volume is preferable.

  Further, in the case of a conventional mosquito mat, since the mat is heated at 100 to 180 ° C., butyl stearate, piperonyl butoxide and N- (2-ethylhexyl) -bicyclo [2,2,1] hepta If a volatilization sustained-release agent such as -5-ene-2,3-dicarboximide is not blended, an excessive insecticidal component is volatilized in the initial stage, and the decrease in the insecticidal effect is remarkable from the middle stage to the latter stage of use, Since the treatment chemical of the present invention is heated for a short time, it does not require such a volatilization sustained release agent.

Examples of the drug carrier containing the insecticidal component include paper, non-woven fabric, resin film, fiber sheet, gel material, ceramics and the like.
Also, those containing an insecticidal component in a gel-like substance, those containing a liquid insecticidal component in a container and covered with a permeable film, and further, an insecticidal component containing 2,4,6-triisopropyl-1,3, What is kneaded in a sublimable member such as 5-trioxane can also be used as a treatment agent.

  The shape of the drug carrier is not particularly limited, and various shapes such as a flat plate shape, a cylindrical shape, a ring shape, a rod shape, a conical shape, and a U shape can be adopted. Further, a frame body can be provided on the outer periphery or a part of the outer periphery of the drug carrier so that a finger or the like does not directly contact a drug such as an insecticidal component.

  In addition, the manufacturing agent used by this invention can employ | adopt a well-known manufacturing method. For example, it can be produced by printing or kneading a drug such as an insecticidal component on a drug carrier.

  The heating element used in the present invention is used by being heated in the range of 70 to 150 ° C., which is a lower temperature than before.

As the heating element, electric heating typified by a heater using PTC characteristics or the like, heating by a chemical reaction using reaction heat of water and calcium oxide, oxygen and iron oxide, or the like can be adopted.
Moreover, it does not specifically limit as a shape of a heat generating body, Various shapes, such as flat form, ring shape, rod shape, cone shape, and U shape, are employable.

Since the pest control apparatus of the present invention needs to shorten the heating time, it is preferable that a control means for controlling the heating of the heating element is provided. These control means include a switch-off function that ends heating after a predetermined heating transpiration time has elapsed, a timer function that controls both the heating start and heating end, and a heating time and a rest time. Is set to 1 hour or less (preferably 15 to 30 minutes), while a predetermined resting time is appropriately set, and an intermittent operation function for alternately operating this is exemplified.
Moreover, even if it is used for any mosquito-removing mat or liquid-type electric mosquito repellent, it is preferable that the heating temperature can be strictly controlled since the pesticidal component that transpires is very small.

  The pest control apparatus of the present invention can use a battery such as a dry battery, a storage battery, or a solar battery, a household power source, or the like as a power source when electric heating is employed for heating the heating element. Here, since the pest control apparatus of the present invention has a short heating time, it is particularly preferable to use a dry battery as a power source because the apparatus becomes compact.

The pest control apparatus of the present invention uses the pyrethroid compound having a specific vapor pressure as the above-described configuration, that is, the insecticidal component, and heats the insecticidal component at a temperature lower than the conventional heating temperature, thereby heating the insecticidal component. Even if the time is reduced to a short time, the treatment space can be made an atmosphere capable of controlling pests over twice the heating time.
For example, even if the heating time is shortened to less than 2 hours, the treatment space can be made into an atmosphere capable of controlling pests over 4 hours.

More specifically, the pest control apparatus of the present invention uses a pyrethroid compound having room temperature volatility as an insecticidal component, and the particle size of the drug released into the air is 1 μm or less, so that the insecticidal substance in the treatment space is used. It is possible to moderately lower the concentration of the components in the air and make the treatment space have an atmosphere that can control pests for a long time.
Here, according to [0058] of Patent Document 2, it is described that the smaller the particle size of the pesticidal component that transpires, the higher the probability of staying in the air. In particular, in the case of a heat transpiration preparation such as a mosquito-removing mat or a liquid electric mosquito repellent, it is known that the particle size of the pesticidal component that transpires is extremely small.
Therefore, the effect of the present invention is presumed to be achieved by combining the following two actions.
(A) Since the particle diameter of the evaporated insecticidal component is as fine as 0.001 to 0.1 μm, it can float for a long time in the space.
(B) Since the insecticidal component is room temperature volatile, what has adhered to the floor or wall is volatilized again.

  Hereinafter, other matters that can be employed in the pest control apparatus of the present invention will be described.

As described above, typical examples of the pest control apparatus according to the present invention include a mosquito collecting mat and a liquid electric mosquito collecting.
Mosquito mats are generally mixed with insecticide ingredients such as kerosene hydrocarbon solvents, stabilizers such as BHT and methyl parahydroxybenzoate, colorants, fragrance ingredients, and deodorant ingredients as needed. Is prepared by impregnating a cellulose mat such as pulp or linter with the stock solution.

Liquid electric mosquito traps may use the same undiluted solution as mosquito trap mats, but instead of hydrocarbon solvents such as kerosene, water, lower alcohols such as ethanol and isopropanol, ester or ether solvents, , Surfactants, dispersants and the like can be used as appropriate to form an aqueous stock solution. The stock solution thus prepared is filled in a chemical bottle equipped with a liquid absorbent wick, and then passed through the liquid absorbent wick at 60 to 140 ° C. It is applied to the method of transpiration with heating.
The material of the liquid absorption core is one that is stable against insecticidal components and that absorbs the stock solution by capillary action. Specifically, it is formed by molding inorganic materials such as clay, talc, perlite, diatomaceous earth, etc. And a plastic core made of a porous ceramic core, a polyester fiber and / or a polyamide fiber. Of these, polyester fibers and / or polyamide fibers are suitable because they have little influence on the insecticidal component. However, since the concentration of the insecticidal component in the stock solution is higher than the conventional one, it is better to select a somewhat porous one so as not to cause clogging in the liquid absorbent core.
In addition, a dye, an antiseptic, 4,4′-methylenebis (2-methyl-6-tert-butylphenol), stearyl-β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate in the liquid absorption core You may add antioxidants, such as these, suitably.

  In the present invention, other volatile chemicals may be added together with the above-described insecticidal components. Such volatile agents include repellent components such as diet, dimethyl phthalate, p-menthane-3,8-diol, antibacterial components such as hinokitiol, tetrahydrolinalol, eugenol, citronellal, allyl isothiocyanate, isopropylmethylphenol, ortho Antifungal ingredients such as phenylphenol, orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, citronella oil, lime oil, yuzu oil, jasmine oil, camellia oil, green tea essential oil, limonene, α-pinene, linalool, geraniol Aromatic components such as phenylethyl alcohol, amylcinnamic aldehyde, cuminaldehyde, and benzyl acetate, green leaf alcohol called “green fragrance”, and flavoring components containing green leaf aldehyde, but are not limited thereto.

  In recent years, so-called aromatherapy has been popular in which aroma components are drifted in the room to relieve the mood and promote recovery from fatigue. However, it can effectively cooperate with the pest control apparatus of the present invention. Specifically, by applying to the present invention a treatment agent to which orange oil, lemon oil, lavender oil, peppermint oil, eucalyptus oil, etc. are added together with the insecticidal component, excellent pest control effect and aromatherapy effect are simultaneously prolonged. It can be enjoyed over time. For example, if it is applied before going to bed, it can be rested without being bitten by mosquitoes and in a relaxed mood, which is extremely practical.

  Furthermore, if necessary, pigments, preservatives, stabilizers, surfactants, dispersants, solvents and the like may be contained. Examples of the dye include organic dyes such as Blue No. 2, and typical examples of the preservative include acids such as sorbic acid, dehydroacetic acid and p-hydroxybenzoic acid, and salts thereof.

  Examples of the stabilizer include an antioxidant and polyethylene glycol as a stabilizer for the carbon powder. In particular, it is preferable to add a di-tert-butyl-phenol stabilizer having a boiling point of 250 ° C. or higher. This stabilizer includes 2,6-di-tert-butyl-4-methylphenol (BHT), 2,2′-methylene bis (4-methyl-6-tertiary butyl phenol), 2,2′-methylene bis (4 -Ethyl-6-tertiarybutylphenol), 4,4'-butylidenebis (3-methyl-6-tertiarybutylphenol), 4,4'-thiobis (3-methyl-6-tertiarybutylphenol), 2-tertiary Butyl-6- (3-tertiarybutyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, 2,4-ditertiarybutylphenyl 3,5-ditertiarybutyl-4-hydroxy Examples include benzoate. By adding such a stabilizer, not only the stability over time of the pyrethroid compound during storage, but also the stability during heat evaporation is remarkably enhanced, and further, the efficacy of the active ingredient after volatilization is improved. Can also contribute. As addition amount of a stabilizer, it is preferable to mix | blend 0.01-0.5 times amount with respect to a pyrethroid compound.

Surfactants and dispersants are used as appropriate in the preparation of dispersions containing insecticidal components and the like. Examples of such surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polyoxy Ethers such as propylene alkyl ethers and polyoxyethylene alkylamino ethers, polyethylene glycol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, fatty acid esters such as polyoxyethylene glycerin fatty acid esters, polyoxyethylene styrenated phenols And polyalkalolamides of fatty acids.
In addition, a saturated hydrocarbon solvent having a boiling point of 150 to 350 ° C. is usually preferable as the solvent used for preparing the dispersion.

  In the present invention, like a mosquito mat or a liquid electric mosquito trap, it is referred to as a mosquito trapping formulation for the sake of convenience, but it goes without saying that it is also applicable to pests other than mosquitoes.

  Further, the pest control apparatus of the present invention configured as described above is useful for indoors and outdoors, preferably in the room at bedtime, at the entrance to the outside, in the living room, etc. , Mosquitoes such as Culex mosquitoes, mosquitoes, chikaeka, mosquitoes such as Aedes aegypti, Aedes albopictus, chironomids, houseflies, butterflies, fleas, flying insects such as aphids, flyfish, mosquitoes, moths, etc. It is highly practical for controlling insects such as cockroaches such as cockroaches and black cockroaches, ticks, ants, bed bugs, chatterworms, hornworms, and weevil.

  According to the pest control apparatus and the pest control method according to the present invention, a pest control apparatus such as a mosquito mat can maintain a long-term insecticidal effect even by short-time heat transpiration. Moreover, a burn can be prevented because heating temperature can be 150 degrees C or less. Further, since the heating time is short and the heating time can be controlled, the apparatus can be driven even by a battery, and can be carried, and restrictions on the place of use can be eliminated.

  Next, the pest control method of the present invention will be described in more detail based on specific examples and test examples, but the present invention is not limited to these.

  Metofluthrin 20 mg is used as an insecticidal component, BHT 2.0 mg, and a trace amount of blue dye are dissolved in 100 mg of kerosene to prepare a stock solution, and a pulp / linter mat (size: 22 × 35 mm, thickness: 2.8 mm) is prepared. The mosquito collecting mat of Example 1 was obtained by impregnation.

  A mosquito collecting mat of Example 2 was obtained in the same manner as in Example 1 except that transfluthrin was used as an insecticidal component.

  A mosquito collecting mat of Example 3 was obtained in the same manner as in Example 1 except that profluthrin was used as an insecticidal component.

  A mosquito collecting mat of Example 4 was obtained in the same manner as in Example 1 except that empentrin was used as the insecticidal component.

Comparative example

  A mosquito collecting mat of Comparative Example 1 was obtained in the same manner as in Example 1 except that Etokku was used as an insecticidal component.

Next, the mosquito collecting mat was placed on a heating plate of an electric mosquito removing device, and the heating plate was heated under the conditions shown in Table 1, and the following “practical insecticidal efficacy test in a 25 m ³ room” was performed. The results are summarized in Table 1.

(Field insecticidal efficacy testing of a room of 25m ³⁾
The mosquito-removing mat was heated and evaporated under the conditions shown in Table 1 in the center of the closed 25 m ³ room. Immediately, 50 female mosquitoes were released and exposed for 2 hours, and then all test mosquitoes were collected. In the meantime, female Culex mosquitoes that fell and turned over time were counted, and the KT ₅₀ value was determined. In the same room, the same operation was performed 4 hours after the heat transpiration and 7 hours after the heat transpiration.

According to the results of the test, according to the pest control apparatus of the present invention (Test Examples 1 to 6) using the results of the mosquito-removing mats of Examples 1 to 4, even after a short heat transpiration treatment of 30 minutes to 2 hours, 7 hours thereafter The extremely excellent insecticidal effect was maintained over the above.
On the other hand, when the etoc having a relatively low vapor pressure was used as the insecticidal component, as in the conventional mosquito collecting mat of Comparative Example 1, the insecticidal effect decreased rapidly with time. From these test results, as the insecticidal component, a pyrethroid compound having a vapor pressure at 30 ° C. of 2 × 10 ⁻⁴ to 1 × 10 ⁻² mmHg, preferably one selected from metfurthrin, profluthrin, and transfluthrin The effect and usefulness of selecting two or more were demonstrated.

  The pest control apparatus of the present invention may be used not only for pest control but also in various fields such as antibacterial, deodorant, and fragrance.

Claims (4)

In a pest control apparatus that volatilizes in the air by heating a treatment agent containing an insecticidal component using a heating element,
A treatment agent containing one or more compounds selected from pyrethroid compounds having a vapor pressure at 30 ° C. of 2 × 10 ⁻⁴ to 1 × 10 ⁻² mmHg as an insecticidal component,
The surface temperature of the heating element is heated to 70 to 150 ° C,
Heat it in a short time,
The particle diameter of the treatment agent containing the insecticidal component that volatilizes in the air is 1 μm or less,
A pest control apparatus characterized in that an atmosphere capable of controlling pests is at least twice as long as the heat transpiration time. The pyrethroid compound is
The pest control apparatus according to claim 1, wherein the pest control apparatus is one or two or more compounds selected from metfurthrin, transfluthrin, profluthrin and empentrin. The pest control device is
The pest control apparatus according to claim 1, further comprising a control unit that controls a heating time of the heating element. A pest control method using the pest control apparatus according to any one of claims 1 to 3, wherein an atmosphere capable of controlling pests is set to a time at least twice as long as the heat transpiration time.