JP7095983B2 - Mosquito coil - Google Patents

Description

The present invention relates to a mosquito coil, and more particularly to a mosquito coil containing a specific amount of a specific pyrethroid compound and a specific fragrance component, and a pest control method using the mosquito coil.

Mosquito repellent incense has long been known as a pest control agent for controlling flying pests such as mosquitoes, flies and buyu, and blood-sucking pests, and does not require electricity or batteries for outdoor work or camping. It is widely used because it can easily obtain excellent pest control effects. Also, for indoor use, many users feel the taste of ceramic mosquito repellents such as mosquito pigs and the unique scent and smoke, so the pest control effect can be obtained for a long time and the effect can be felt. It is used habitually.
Mosquito repellent incense is a mechanism to obtain pest control effect by volatilizing pest control components in the space by burning, so to obtain pest control effect for a long time in indoor and outdoor spaces where flying pests and blood-sucking pests newly invade. Needs to burn mosquito pests continuously. However, since buildings in recent years, especially office buildings and condominiums in urban areas, are highly sealed, the chances of flying pests and blood-sucking pests invading the building from outside the building are decreasing. For this reason, in a highly airtight space, it may not be necessary to continuously burn mosquito coils if the flying pests and blood-sucking pests are first exterminated.
A pest control method that controls the residual rate of pest control components in the air by the particle size in the space in order to obtain the pest control effect of flying pests and blood-sucking pests for a long time in such a highly airtight space (Patent Documents). 1) and an aerosol agent for pest control (Patent Document 2) that improves the pest control component adhesion efficiency to a wall or the like by a specific spray particle size have been proposed, and a pest control effect for a long period of time has been obtained. On the other hand, there is also a drawback that the user does not have a chance to realize the pest control effect.

Therefore, the present inventor has started to develop a new mosquito coil suitable for use in a highly airtight space with respect to the mosquito coil whose basic method of use is continuous combustion for 6 hours or more. For the mosquito coil used in a highly airtight space, it is important to surely suppress the smoke and pungent odor generated during combustion and to improve the odor masking technology. Furthermore, it is a new issue in this development that the fragrance can be obtained for a long time as well as the pest control effect so that the user can actually feel the pest control effect for a long time.

Japanese Unexamined Patent Publication No. 2009-035569 Japanese Unexamined Patent Publication No. 2015-027982

The present invention has been made in view of the above circumstances, and provides a new mosquito coil suitable for use in a highly airtight space, so that the user can actually feel the pest control effect. The challenge is to provide mosquito coils that can obtain fragrance for a long period of time as well as pest control effects.

As a result of diligent research to solve the above problems, the present inventor combines a pyrethroid compound having a specific vapor pressure and a specific fragrance component in a specific amount to burn for a short time in a highly airtight space. We have found that the pest control effect can be maintained for a long period of time and that the mosquito coil can be used to obtain a fragrance for a long period of time as well as the pest control effect, and the present invention has been completed.

Specifically, the present invention has the following gist.
1. 1. Contains the following components (A), (B) and (C),
The content of the component (A) is 0.005% by weight or more and 5% by weight or less.
A mosquito coil characterized in that the content of the component (B) is 0.00025% by weight or more and 5% by weight or less.
Component (A): Pirethroid compound having a vapor pressure in the range of 1 × 10 ^-5 to 1 × 10 ^-4 mmHg at 25 ° C. according to the Donovan method. -One or more fragrance components selected from dinitro-2,6-dimethyl-4-t-butylacetophenone, β-ionone, acetylsedrene and α-isomethylionone Component (C): Incense base material 2. 2. 1. The total length is 10 mm or more and 50 mm or less, the thickness is 2 mm or more and 5 mm or less, the weight is 0.2 g or more and 2 g or less, and it is a short-time combustion type. The mosquito coil described in.
3. 3. 1. The component (A) is one or more pyrethroid compounds selected from metoflutrin, profluthrin, and transfluthrin. Or 2. The mosquito coil described in.
4.1. ~ 3. A pest control method, wherein the mosquito coil according to any one is used indoors, and the pest control effect and the aroma are maintained for at least 12 hours.

The mosquito coil of the present invention contains a specific amount of a pyrethroid compound having a specific vapor pressure as the component (A), so that the pest control effect is prolonged only by burning for a short time in a highly airtight space. Can last for a long time.
The mosquito coil of the present invention is fragrant for a long period of time as well as the pest control effect by combining a pyrethroid compound having a specific vapor pressure as the component (A) and a specific fragrance component as the component (B) in specific amounts. Therefore, the user can actually feel the pest control effect by the scent.

It is a schematic diagram of the test laboratory in the test method of the insecticidal activity sustainability confirmation test.

Hereinafter, the mosquito coil of the present invention and the pest control method using the mosquito coil will be described in detail.

The mosquito coil of the present invention contains a pyrethroid compound having a specific vapor pressure as the component (A), a specific fragrance component as the component (B), and an incense base as the component (C).
<About component (A)>
The component (A) in the present invention is described in the article: Journal of Chromatography A. Volume 749, Issues 1-2, 1996, Pages 123-129 (New method for estimating vapor pressure by the use of gas chromatography). Hereinafter, it is a pyrethroid compound having a vapor pressure of 25 ° C. determined by the “Donovan method”) in the range of 1 × 10 ^-5 to 1 × 10 ^-4 mmHg. The pyrethroid compound contained in the component (A) in the present invention is, for example, metoflutrin: 2,3,5,6-tetrafluoro-4-methoxymethylbenzyl 3- (1-propenyl) -2,2-dimethylcyclopropanecarboxy. Lat (1.4 × ^10-5 mmHg), Profluthrin: 2,3,5,6-tetrafluoro-4-methylbenzyl 3- (1-propenyl) -2,2-dimethylcyclopropanecarboxylate (7.7) × ^10-5 mmHg), transfluthrin: 2,3,5,6-tetrafluorobenzyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate (2.6 × ^10-5 ) mmHg), 2,3,5,6-tetrafluoro-4-methylbenzyl 3- (2-chloro-2-fluorovinyl) -2,2-dimethylcyclopropanecarboxylate (4.9 × ^10-5 mmHg) , 2-Methyl-3-allyl-4-oxo-2-cyclopenten-1-yl 2,2,3,3-tetramethylcyclopropanecarboxylate (3.5 × ^10-5 mmHg), 2,3,5 , 6-Tetrafluoro-4-methylbenzyl 3- (2-methyl-1-propenyl) -2,2-dimethylcyclopropanecarboxylate (3.1 × ^10-5 mmHg), 5-Propargyl-2-furfuryl 3 -(2-Methyl-1-propenyl) -2,2-dimethylcyclopropanecarboxylate (2.5 x ^10-5 mmHg), 2,3,5,6-tetrafluoro-4-methoxybenzyl 3-methoxyimino Methyl-2,2-dimethylcyclopropanecarboxylate (1.5 × ^10-5 mmHg) and the like can be exemplified. Among these pyrethroid compounds, at least one selected from metoflutrin, profluthrin, and transfluthrin is preferable as the component (A) of the present invention.

In the mosquito coil of the present invention, containing the component (A) in the range of 0.005% by weight or more and 5% by weight or less with respect to the total amount of the mosquito coil causes only short-time burning in a highly airtight space. Therefore, it is important for the pest control effect to last for a long time. Among them, the component (A) is preferably in the range of 0.01% by weight or more and 2% by weight or less, and more preferably in the range of 0.05% by weight or more and 1% by weight or less with respect to the total amount of mosquito coil.

<About component (B)>
The component (B) in the present invention is 2-cyclohexylidene-2-phenyl acetonitrile, 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone, β-ionone, acetylsedrene and α-iso. One or more fragrance components selected from methylionone.
2-Cyclohexylidene-2-phenylnitrile has a grapefruit, geranium and rose floral-like aroma.
3,5-Dinitro-2,6-dimethyl-4-t-butylacetophenone is an early synthetic musk muskketone called nitromusk. It is a fragrance ingredient that has a scent similar to that of natural musk.
β-ionone is a fragrance component having the chemical name "4- (2,6,6-trimethyl-1-cyclohexenyl) -3-buten-1-one" and is a liquid of woody fragrance. It is a fragrance ingredient used in floral compound fragrances.
Acetyl sedrene has the chemical name "1-[(2,3,4,7,8,8a-hexahydro-3,6,8,8, -tetramethyl-1H-3a, 7-methanoazulen) -5. Il] A fragrance component of ethane, a pale yellow liquid with musk, amber, and woody-like scents. It is a fragrance component used in large quantities in woody-based compound fragrances, etc., and isolated from cedarwood oil, etc. It can be obtained by acetylating sedrene.
α-Isomethylionone is one of the six isomers of methylionone and is an elegant violet scented liquid.
The mosquito coil of the present invention may appropriately contain known fragrance components other than the component (B) as long as the effects of the present invention are not impaired.

The mosquito coil of the present invention may contain 2-cyclohexylidene-2-phenyl acetonitrile and 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone as the component (B). In addition to 2-cyclohexylidene-2-phenyl acetonitrile and 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone, known fragrance components can be appropriately blended, among which methyl dihydrojasmonate and lylar can be blended. One or two selected from (4- (4-hydroxy-4-methylpentyl) -3-cyclohexenylcarbaldehyde), lyrial (2-methyl-3- (4-t-butylphenyl) propanol) It is advisable to add the above fragrance ingredients. Further, the mosquito coil of the present invention may contain β-ionone, acetylsedrene and α-isomethylionone as the component (B). In addition to β-ionone, acetylsedrene and α-isomethylionone, known fragrance components can be appropriately blended, but among them, ethylvanillin is preferably blended.
In the mosquito coil of the present invention, containing the component (B) in the range of 0.00025% by weight or more and 5% by weight or less with respect to the total amount of the mosquito coil causes only short-time burning in a highly airtight space. Therefore, it is important because the fragrance can be obtained for a long time as well as the pest control effect, and the user can actually feel the pest control effect by the scent. Among them, the component (B) is preferably in the range of 0.0003% by weight or more and 2% by weight or less, more preferably 0.0005% by weight or more and 1% by weight or less, and further 0. A range of 001% by weight or more and 0.4% by weight or less is more preferable.

<About component (C)>
The component (C) in the present invention is an incense stick base material. The incense stick base material in the mosquito coil of the present invention can be roughly classified into a combustion base material (combustion material), a binder and a bulking agent.
Examples of the combustion base material (fuel support agent) include byakushin powder, byakudan powder, kusunoki powder, mominoki powder, sugi powder, hinoki powder, tsuga powder, pine powder, yanagi powder, ubamegashi powder, oak powder, kunugi powder, and nara powder. , Itayakaede powder, Naraharigiri powder, Hoonoki powder, Shinanoki powder, Tohi powder, Yellow poplar powder, Katsura powder, Acacia powder, Yamanarashi powder, Oobabodaiju powder, Oobayanagi powder, Sawagurumi powder, Nezuko powder, Kiri powder, Shioji powder, Barça powder , Rubber powder, Rawan powder, Shirakaba powder, Mitsumata powder, Oga powder, Bamboo powder, Citrus powder (orange, citrus peel), Palm family plant powder (coconut powder, etc.), Kiku family plant powder, Akane family plant powder, Watermelon Family plant powder, Sendan family plant powder, Ginkgo family plant powder, Perilla family plant powder, Futomomo family plant powder, Seri family plant powder, Rice family plant powder, Kuwa family plant powder, Mokusei family plant powder, Insect chrysanthemum extract powder (cass powder) ) And the like, and one or a mixture of two or more of these can be used. Among them, wood powder, which is a raw wood powder, and coconut powder, which is a dry powder of coconut fruit, are suitable as a combustion base material (combustion material) from the viewpoint of combustibility and moldability.
The particle size of the combustion base material (combustion material) is preferably about 40 to 350 μm because it does not fly up during manufacturing and the strength of the incense stick can be ensured. Further, the combustion base material (combustion agent) is preferably mixed in the composition of the mosquito coil in a proportion of 20 to 60% by weight. By mixing the combustion base material (fuel-supporting agent) in this blending ratio, it is difficult for the combustion base material (fuel-supporting agent) to disappear, and the effect of facilitating molding is achieved.
The binder is also called starch, and serves as a glue that binds a combustion substrate (fuel-supporting agent). For example, celluloses such as carboxymethyl cellulose, hydroxymethyl cellulose, and hydroxypropyl methyl cellulose, tabnoki skin extract powder, and tabs. Examples thereof include starches such as powder, starch and starch, natural polymer compounds such as gum arabic, and synthetic polymer compounds such as polyvinyl alcohol and polyvinylpyrrolidone. Of these, machilus thunbergii, which is a dry powder of leaves and bark of evergreen trees belonging to the genus Machilus thunbergii, is preferable.
Examples of the bulking agent include calcium carbonate, diatomaceous earth, glass powder, kaolin, clay, talc and the like.
The mosquito coil of the present invention preferably contains an inorganic powder to be blended as a bulking agent in a range of 30% by weight or more and 70% by weight or less, particularly 40% by weight or more, based on the total amount of the mosquito coil. It is more preferable to contain it in the range of 60% by weight or less. By setting the blending amount of the inorganic powder within the above range, the mosquito coil of the present invention can reduce the amount of smoke, and further, since the ash after combustion becomes hard, it is suitable without scattering to the surroundings. be.

The component (C) incense base material in the present invention may contain an emulsifier, a preservative, an insecticide / repellent, a deodorant, a volatilization rate improving agent, a coloring agent and the like as other components.
Examples of the emulsifier include surfactants such as sorbitan monostearate, polyoxyethylene sorbitan monooleic acid, and polyoxyethylene sorbitan monooleate.
Examples of the preservative include paraoxybenzoic acid esters such as isopropylmethylphenol, orthophenylphenol, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, and butyl p-hydroxybenzoate, and PCMX. , IPBC, chlorhexidine gluconate, chlorhexidine hydrochloride, sorbic acid, dehydroacetic acid, salts thereof and the like.
Examples of the deodorant include lauryl methacrylate, geranylcrotonate, catechin, polyphenol, tea leaves and the like.
Examples of the volatilization rate improving agent include phenethyl isothiocyanate, dimethyl high mix acid, potassium nitrate, manganese dioxide and the like.
Examples of the colorant include Red No. 106, Red No. 102, Blue No. 1, Blue No. 2, Yellow No. 5, Yellow No. 4, Yellow No. 202 (1), Yellow No. 202 (2), and Green No. 3. , Green 201, Green 204, Green 205, Green 401, Green 402, Orange 207, Black 401 and other legal pigments and malakite green.

The mosquito coil of the present invention can be produced by a conventionally known method, but at least has a step of kneading the component (A), the component (B) and the component (C) with water or warm water, and then. For example, may be manufactured by molding with an extruder or a punching machine and then drying.
The conventional mosquito coil has a burning time of at least 6 hours or more, but the mosquito coil of the present invention has one embodiment in which the burning is completed within 30 minutes at the longest. The burning time is 10 minutes or more and 30 minutes or less. The short-time combustion of the present invention means that the combustion is completed within 30 minutes.
The short-time burning type mosquito coil is also significantly different in shape from the conventional mosquito coil. The conventional mosquito coil has a spiral total length of 700 mm or more, a thickness of 5 mm or more, and a weight of 10 g or more, whereas the short-time combustion type mosquito coil, which is one aspect of the present invention, has a total length. Is in the range of 10 mm or more and 50 mm or less, the thickness is in the range of 2 mm or more and 5 mm or less, and the weight is in the range of 0.2 g or more and 2 g or less. Among them, the mosquito coil of the present invention preferably has a total length in the range of 20 mm or more and 50 mm or less, a thickness in the range of 2.5 mm or more and 4.5 mm or less, and a weight in the range of 1 g or more and 1.8 g or less.
The shape of the incense stick can be appropriately selected from a rod shape, a spiral shape, a cone shape, a plate shape (plate shape), etc. depending on the purpose of use, and among them, a plate shape (plate shape) is preferable.

The pest control method of the present invention is characterized in that the pest control effect and the fragrance last for at least 12 hours using the mosquito coil of the present invention, and is suitable for use in a highly airtight space. This is the method. The pests in the present invention are not particularly limited. Chironomidae, Chironomidae, Ceratopogonidae, Chironomidae, Chironomidae, Chironomidae, Chironomidae, Chironomidae, Chironomidae, Ceratopogonidae, Ceratopogonidae, etc. Examples include chironomids such as biting pests, midges, midges, midges, chironomids, midges, and chironomids, and bees. Blood-sucking and biting pests are particularly suitable.

Hereinafter, the present invention will be described in more detail with reference to pharmaceutical examples, test examples and the like, but the present invention is not limited to these examples. In the examples, parts means parts by weight unless otherwise specified.

<Insecticidal activity sustainability confirmation test>
The mosquito coil of the present invention is burned for a short time in a highly airtight space by using the components (A), (B) and (C) in combination and containing the components (A) and (B) in specific amounts. It is shown by the test using the common house mosquito that the pest control effect can be maintained for a long time only by letting it.
(1) Ingredients (B) Fragrance Ingredients 2-Cyclohexylidene-2-phenyl acetonitrile and 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone were added in an amount of 5% by weight and 5% by weight, respectively, based on the total amount of the fragrance. 2% by weight was used.
(2) Test Specimen A well-mixed mixture of wood powder, coconut powder and tab powder was used as the combustion base material (combustion material) of the incense stick base material (C).
Next, 0.4 parts by weight of metoflutrin as the component (A), 0.1 part by weight of the fragrance containing the above-mentioned fragrance component as the component (B), and 50 parts by weight of calcium carbonate which is an bulking agent as the component (C) incense base material. And the above-mentioned combustion base material (combustion material) was used to make the total amount 100 parts by weight, and an appropriate amount of warm water was added thereto and kneaded until uniform. The kneaded product was formed into a sheet shape (strip shape) using an extruder (extruder), and then punched into a plate shape by a punching machine. After that, an isosceles triangle having an angle of 36 degrees at one end and a height of 40 mm was dried in a breeze at 65 ° C. for 10 hours, and each piece weighed 1.5 g and had a thickness of 3 mm. A time-burning mosquito coil was obtained. This was used as a test sample.

(3) Test method As shown in Fig. 1, 20 test insects (common house mosquitoes) were placed in a non-ventilated 8 tatami mat test room (3.6 m x 3.6 m x height 2.4 m ≈ 31.1 m ³ ). Two polyester cages (14 mesh, 23 cm x 23 cm PET net folded in half to form a bag) at a height of 0.75 m and 1.5 m from the floor of the test room, two diagonally each. A total of 4 pieces were installed in the direction.
The installation was performed immediately after the start of the test, 6 hours after the start of the test, and 12 hours after the start of the test, which is the timing for observing the number of knockdowns of the test insects.
The test was started when the test sample ignited at one end was placed on an incense stick and placed in the center of the test room. The burning time of the test sample was 15 minutes.
Immediately after the start of the test, 6 hours later, and 12 hours later, the number of knockdowns of the test insects in the four polyester cages installed was measured every 10 minutes.
The knockdown rate is calculated from the number of knockdowns of the test insects over time (the number of animals that have stopped behaving), and the KT ₅₀ value (time when 50% of the test insects are knocked down) is calculated from the knockdown rate with the passage of time by the probit method. : Minutes) and KT ₉₀ values (time: minutes for 90% of test insects to be knocked down) were calculated.
In addition, the four polyester cages installed were left in the test chamber for 2 hours immediately after the start of the test, 6 to 8 hours, and 12 to 14 hours, respectively, and then the test insects were placed in a plastic container. The cells were transferred, transferred to a separate room at 25 ° C., given sugar water, and the number of dead insects after 24 hours was measured, and the lethality rate (%) after 24 hours was calculated.
Two tests were performed for each test sample, and Table 1 shows the average values of KT ₅₀ value (minutes), KT ₉₀ value (minutes), and case fatality rate (%) after 24 hours.

From the results in Table 1, the mosquito coil of the present invention has a KT ₅₀ value of 19.8 minutes and a KT ₉₀ even after 12 to 14 hours have passed from the start of the test (burning start), that is, half a day has passed. The value was 44.7 minutes, and it was confirmed that the pest control effect lasted for a long time when used in a highly airtight space even if the burning time was short.
Furthermore, as shown in "Case fatality rate after 24 hours" in Table 1, since the mortality rate is almost 100%, it can be confirmed that the knockdown (stopped) test insect also died thereafter. It has been clarified that the mosquito coil of the present invention exerts a high insecticidal effect when used in a highly airtight space.

<Aroma persistence confirmation test>
The mosquito coil of the present invention is a pest in use in a highly airtight space by using the components (A), (B) and (C) in combination and containing a specific fragrance component as the component (B). Tests show that the fragrance can be obtained for a long time as well as the control effect.
(1) Component (B) Fragrance component The following fragrance components (b1), (b2) and (b3) were used as the component (B) of the present invention.
(B1): 5% by weight of 2-cyclohexylidene-2-phenyl acetonitrile and 2% by weight of 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone (b2) with respect to the total amount of fragrance. : 8% by weight β-ionone to the total amount of fragrance, 5% by weight acetylsedrene and 5% by weight α-isomethylionone (b3): 5% by weight α-iso to the total amount of fragrance Methylionone (2) Test sample Wood flour, coconut flour and tab flour were placed in a dairy pot and mixed well, and used as the combustion base material (fuel support material) of the component (C) incense base material.
Next, as the component (A), 0.4 parts by weight of metoflutrin, as the component (B), 0.1 part by weight of the fragrance containing any of the above (b1) to (b3) fragrance components, and as the component (C) incense base material. Using 50 parts by weight of calcium carbonate as an bulking agent and the above-mentioned combustion base material (combustion material), the total amount was 100 parts by weight, and an appropriate amount of warm water was added thereto and kneaded until uniform. The kneaded product was formed into a sheet shape (strip shape) using an extruder (extruder), and then punched into a plate shape by a punching machine. After that, an isosceles triangle having an angle of 36 degrees at one end and a height of 40 mm was dried in a breeze at 65 ° C. for 10 hours, and each piece weighed 1.5 g and had a thickness of 3 mm. A time-burning mosquito coil was obtained. This was used as a test sample of Examples 1 to 3. Moreover, the same test sample as in Example was used as a comparative example except that the fragrance containing no component (B) was used. The details of Examples 1 to 3 and Comparative Examples 1 to 3 used in the test are as follows.
Example 1: Test sample containing the above fragrance component (b1) as a fragrance Comparative Example 1: The same test sample as Example 1 except that the above fragrance component (b1) is not contained as a fragrance Example 2: The above fragrance as a fragrance Test Specimen Containing Component (b2) Comparative Example 2: Same test sample as Example 2 except that the fragrance component (b2) is not contained as a fragrance Example 3: Test containing the fragrance component (b3) as a fragrance Specimen Comparative Example 3: The same test sample as in Example 3 except that the above fragrance component (b3) is not contained as a fragrance (2) Test method Test sample ignited at one end (Examples 1 to 3 and Comparative Examples 1 to 3) Was placed on an incense plate and placed in the center of the floor of a non-ventilated 8 tatami mat test room (3.6 m x 3.6 m x height 2.4 m ≈ 31.1 m ³ ) and left for 12 hours under non-ventilated conditions. After 12 hours, a sensory evaluation was performed on "smoke odor" and "scent intensity".
Twenty panelists evaluated the two items of "smoke odor" and "fragrance intensity" in the following five stages, calculated the average score for each item, and "smoke odor masking evaluation" and "fragrance" according to the following [evaluation criteria]. The results are shown in Table 2 as "evaluation".
"Smoke smell"
1 point: Smoke odor 2 points: Smoke odor 3 points: Normal 4 points: Not very smoky odor 5 points: Smoke odor not "fragrance intensity"
1 point: weak scent 2 points: slightly weak scent 3 points: normal 4 points: slightly strong scent 5 points: strong scent
[Evaluation criteria]
A: Evaluation average score is 3 points or more B: Evaluation average score is 2 or more and less than 3 C: Evaluation average score is 1 or more and less than 2

From the results in Table 2, the mosquito coil of the present invention (Examples 1 to 3) has an A rating of "3.0" or higher in both "smoke odor masking evaluation" and "fragrance evaluation", and is a highly airtight space. It was confirmed that the smoke odor masking effect and the aroma were excellent even after 12 hours as well as the pest control effect. On the other hand, the mosquito coil (Comparative Examples 1 to 3) containing no component (B) of the present invention has a B or C rating lower than "3.0" in both "smoke odor masking evaluation" and "fragrance rating". It was confirmed that the smoke odor masking effect and fragrance were inferior.
It has been clarified that the component (B) of the present invention is a component that exerts an excellent effect of maintaining the fragrance while masking the smoke odor of the mosquito coil for a long period of time.

According to the present invention, by combining a pyrethroid compound having a specific vapor pressure as a component (A) and a specific fragrance component as a component (B) in a specific amount, a fragrance can be obtained for a long time as in the pest control effect. Therefore, it is useful because it can be a mosquito coil that allows the user to feel the pest control effect by the scent. Furthermore, by linking the fragrance with the pest control effect, it is presumed that the user will be able to recognize the continuation of the pest control effect depending on the presence or absence of the scent.

Claims (4)

Contains the following components (A), (B) and (C),
The content of the component (A) is 0.005% by weight or more and 5% by weight or less.
A short-time burning mosquito coil within 30 minutes, characterized in that the content of the component (B) is 0.00025% by weight or more and 5% by weight or less.
Component (A): Pirethroid compound having a vapor pressure in the range of 1 × 10 ^-5 to 1 × 10 ^-4 mmHg at 25 ° C. according to the Donovan method Component (B): 2-cyclohexylidene-2-phenyl acetonitrile , β -ionone , Acetyl Cedren and α-isomethylionone, any one or more fragrance components Component (C): Incense stick base material Contains the following components (A), (B) and (C),
The content of the component (A) is 0.005% by weight or more and 5% by weight or less.
Short-time burning mosquito coil within 30 minutes, characterized by a content of component (B) of 0.00025% by weight or more and 5% by weight or less (however, transfluthrin, muskketone, vanillin, allylhepta). Excluding mosquito coils containing noate and citronellol).
Component (A): Vapor pressure at 25 ° C. by the Donovan method is 1 × 10. ^-5 ~ 1x10 ^-4 Pyrethroid compounds in the mmHg range
Ingredient (B): 3,5-dinitro-2,6-dimethyl-4-t-butylacetophenone
Component (C): Incense stick base material The 30 minutes or less according to claim 1 or 2 , wherein the total length is 10 mm or more and 50 mm or less, the thickness is 2 mm or more and 5 mm or less, the weight is 0.2 g or more and 2 g or less, and the short-time combustion type is used. Short-time burning mosquito coil. A pest control method according to any one of claims 1 to 3, wherein the short-time burning mosquito coil within 30 minutes is used indoors, and the pest control effect and fragrance are maintained for at least 12 hours.

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