JPH0563441B2 - - Google Patents

Description

[Detailed description of the invention]

【0001】

TECHNICAL FIELD The present invention relates to a heating transpiration insecticidal method, and more particularly to a heating transpiration insecticidal method using a suction type heating transpiration type insecticidal device using a liquid-absorbing wick.

【0002】

[Prior art and its problems] Conventionally, a method of heating and evaporating chemicals for the purpose of killing insects has been to apply them to porous substrates (solid pine) such as fiberboard using devices such as electric mosquito repellents. A commonly used method is to heat and evaporate the adsorbed insecticide. However, in this method, the amount of insecticide that can be impregnated into one solid pine is naturally limited, and it is necessary to replace the pine and dispose of the used pine. Moreover, the volatilization rate of insecticides adsorbed to pine trees decreases over time, which is a serious drawback, and the effective volatilization rate of insecticides adsorbed to pine trees is only about 50% at most. The insecticide residual rate is as high as about 10%, making it impossible to maintain a stable insecticidal effect over a long period of time, and resulting in considerable economic disadvantages.

[0003] As a heat evaporation method that can eliminate the problem of replacing the pine and the disadvantage that the insecticidal effect disappears within a short period of time seen in the use of solid pine, and can maintain the insecticidal effect over a long period of time, the insecticide is applied in the form of a solution. A method of heating and evaporating the insecticide while sucking it up with a suction wick (liquid wick) has been considered, and in fact, various insecticide evaporation devices using such a liquid wick have been proposed. In these devices, a solvent solution of an insecticide is placed in a suitable container, which is sucked up using a liquid-absorbing wick made of felt, etc., and then heated and evaporated from the upper part of the liquid-absorbing wick.

[0004] However, when such a suction heat evaporation insecticide device is actually used, the solvent constituting the insecticide liquid quickly evaporates due to the heating of the liquid absorption core, and the inside of the core is heated. The insecticide liquid gradually becomes concentrated, turns into resin, and the core material is smoldered.
Those that cause clogging and make subsequent suction and evaporation of the insecticidal solution impossible, cannot exhibit long-term sustained effects, and cannot avoid a decline in insecticidal effectiveness over time, and have a low effective volatilization rate and a high residual rate. It was hot. The causes of various adverse effects seen in such heating evaporation methods using wicks include not only the type of wick and the type of solvent, but also the type of insecticide, concentration, heating conditions, etc. It was thought that it would be difficult to eliminate the above-mentioned disadvantages.

[0005] The present invention utilizes a suction type heating evaporation type insecticidal device to avoid clogging of the liquid suction wick, achieve a long-term sustainable insecticidal effect, and further reduce the total amount of insecticide volatilization and effective volatilization. It is an object of the present invention to provide an improved heat transpiration insecticidal method that can improve the rate of insect killing.

【0006】

[Means for Solving the Problems] According to the present invention, a part of the liquid-absorbing wick is immersed in an insecticidal liquid so that the wick absorbs the insecticidal liquid, and the upper part of the wick is indirectly heated. The heating transpiration insecticidal method for evaporating the sucked insecticidal liquid is characterized by indirectly heating the upper part of the wick using a heating element with a surface temperature of 70 to 150°C to a temperature such that the surface temperature is 135°C or less. A heat transpiration insecticidal method is provided.

[0007] Furthermore, according to the present invention, a part of the liquid-absorbing wick is immersed in the insecticidal liquid to cause the wick to absorb the insecticidal liquid, and the upper part of the wick is indirectly heated to absorb the insecticidal liquid. In the heating transpiration insecticidal method of transpiring 3-allyl-2-methylcyclopent-2-en-4-one-1-yl dl-cis/ as the insecticidal liquid.
trans-chrysanthemate, d-3-allyl-
2-Methylcyclopent-2-en-4-one-
1-yl d-trans-chrysanthemate, 3
-Allyl-2-methylcyclopent-2-ene-
4-one-1-yl d-trans-chrysanthemate, N-(3,4,5,6-tetrahydrophthalimido)-methyl dl-cis/trans-chrysanthemate, [(R,S)-α -cyano-3-phenoxybenzyl]-(R)-2-[2-chloro-4-
trifluoromethyl)anilino]-3-methyl-
Butanolate, 5-(2-propargyl)-3-furylmethyl chrysanthemate, 5-benzyl-
3-furylmethyl d-cis/trans-chrysanthemate, [(pentafluorophenyl)-methyl]-1R,3R-3-(2,2-dichloroethynyl)-2,2-dimethyl-cyclopropanecarboxylate , α-cyanophenoxybenzyl isopropyl-4-chlorophenyl acetate, 3
-Phenoxybenzyl 2,2-dimethyl-3-
(2',2'-dichloro)vinylcyclopropane carboxylate, 3-phenoxybenzyl d,
cis/trans-chrysanthemate, (R,S)-
α-cyano-3-phenoxybenzyl (1R, 1S)
-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, α-cyano-3-phenoxybenzyl d-cis/trans-chrysanthemate, (S)-
2-Methyl-4-oxo-3-(2-propynyl)
Cyclopent-2-enyl (1R)-cis/trans-chrysanthemate, 3-allyl-2-methylcyclopent-2-en-4-one-1-yl
2,2,3,3-tetramethylcyclopropanecarboxylate, 1-ethynyl-2-methyl-2
-Pentenyl cis/trans-chrysanthemate, 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropane-1-carboxylate, 1-ethynyl- 2-Methyl-2-pentenyl 2,2,3,3-tetramethylcyclopropanecarboxylate, 1-ethynyl-2-methyl-
2-Pentenyl 2,2-dimethyl-3-(2,
2-dichlorovinyl)cyclopropane-1-carboxylate, 2,2-dimethyl-3-dichlorovinyl-cyclopropanecarboxylic acid 2,3,
Using an organic solvent solution containing at least one type of insecticide active ingredient selected from isomers such as 5,6-tetrafluorobenzyl ester and the like, a liquid absorbent core material is coated with a binder and/or glue. bonded with an agent, and the surface temperature is 70 to 150
The surface temperature of the upper part of the wick is 135℃ using a heating element of ℃.
The above heating transpiration insecticidal method is characterized by indirect heating to a temperature of: There is provided the above heating transpiration insecticidal method which takes less than an hour.

[0008] The method of the present invention utilizes the above-described specific insecticidal liquid composition for a liquid-absorbing wick in a suction-type heating evaporation type insecticidal device, thereby eliminating clogging of the liquid-absorbing wick and extending the life of the wick. Based on this, the evaporability (volatilization amount and effective volatilization rate) of the insecticide can be significantly improved, and excellent insecticidal effects can be sustained over a long period of time.

[0009] In the method of the present invention, the insecticide is
Any of the various chemicals conventionally used for pest control can be used. The drugs include various pyrethroid insecticides, carbamate insecticides, organophosphorus insecticides, and the like. Specific examples thereof include the following.

[0010] ●3-allyl-2-methylcyclopent-2-en-4-one-1-yl dl-cis/
trans-chrysanthemate (generic name: allethrin; trade name: pinamine; manufactured by Sumitomo Chemical Co., Ltd.,
(hereinafter referred to as AA) ●3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis/trans-
Chrysantemate (trade name: Pinamine Forte, manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AB) ●d-3-allyl-2-methylcyclopenta-2
-en-4-one-1-yl d-trans-chrysanthemate (trade name Exlin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AC) ●3-allyl-2-methylcyclopent-2-ene-4- On-1-yl d-trans-chrysanthemate (generic name: bioallethrin, hereinafter referred to as AD)
) ●N-(3,4,5,6-tetrahydrophthalimido)-methyl dl-cis/trans-chrysanthemate (generic name: phthalthrin; trade name: neopinamine; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AE) ● 2-Methyl-4-oxo-3-(2-propenyl)cyclopent-2-enyl-chrysanthemate●(S)-2-methyl-4-oxo-3-(2-propynyl)cyclopent-2-enyl ( 1R)-cis/trans-chrysanthemate (generic name Prallethrin: see Japanese Patent Publication No. 52-45768) ●5-benzyl-3-furylmethyl d-cis/
Trans-chrysanthemate (generic name Resmethrin; trade name Chrylonfuorte; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AF) ●5-(2-propargyl)-3-furylmethyl chrysanthemate (generic name Framethrin, below
AG) ●3-Phenoxybenzyl 2,2-dimethyl-
3-(2′,2′-dichloro)vinylcyclopropane carboxylate (generic name: permethrin; trade name: Exmin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter)
(referred to as AH) ●3-Phenoxybenzyl d-cis/trans-chrysanthemate (generic name: Phenothrin; trade name: Sumitrin: manufactured by Sumitomo Chemical Co., Ltd.; hereinafter referred to as AH)
(referred to as AI) ●α-cyanophenoxybenzyl isopropyl-4-chlorophenyl acetate (generic name: Fuenvalerate; trade name: Sumicidin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AJ) ●(S)-α-cyano-3 -Phenoxybenzyl (1R, cis)-3-(2,2-dichlorovinyl)-
2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as AL) ●(R,S)-α-cyano-3-phenoxybenzyl (1R,1S)-cis/trans-3-(2,2
-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as AM) ●α-cyano-3-phenoxybenzyl d-cis/trans-chrysanthemate (hereinafter referred to as AN) ●1-ethynyl-2 -methyl-2-pentenyl
Cis/trans-chrysanthemate (hereinafter referred to as AO) ●1-ethynyl-2-methyl-2-pentenyl
2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropane-1-carboxylate (hereinafter referred to as AP) ●1-ethynyl-2-methyl-2-pentenyl
2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as AQ) ●1-ethynyl-2-methyl-2-pentenyl
2,2-dimethyl-3-(2,2-dichloropynyl)cyclopropane-1-carboxylate (hereinafter referred to as AR) ●3-allyl-2-methylcyclopent-2-en-4-one-1-yl 2 ,2,3,3-tetramethylcyclopropanecarboxylate (generic name telarethrin) ●[(pentafluorophenyl)-methyl]-1R,
3R-3-(2,2-dichloroethynyl)-2,2
-dimethyl-cyclopropanecarboxylate (generic name: phenfluthrin) ●[(R,S)-α-cyano-3-phenoxybenzyl]-(R)-2-[2-chloro-4-(trifluoro methyl)anilino]-3-methyl-butanolate (common name fluvalinate) O,O-dimethyl O-(2,2-dichloro)
Vinyl phosphate (hereinafter referred to as AS) ● o-isopropoxyphenyl methyl carbamate (hereinafter referred to as AT) ● 0,0-dimethyl 0-(3-methyl-4-nitrophenyl) thionophosphate (hereinafter referred to as AU
) ●0,0-diethyl 0-2-isopropyl-4
-Methyl-pyrimidyl-(6)-thiophosphate 0,0-dimethyl S-(1,2-dicarboethoxyethyl)-diothiphosphate

[0011] Various commonly used additives such as efficacy enhancers, volatilization rate improvers, deodorants, and fragrances can be optionally added to the above insecticide. Potency enhancers include piperonyl butoxide, N-propylisome, MGK-264, and cinepirin.
222, Cinepirin 500, Risen 384, IBTA,
S-421, etc., volatilization rate improvers include phenethyl isothiocyanate, dimethyl himixate, etc., deodorants include lauric acid methacrylate (LMA), and fragrances include citral, citronellal, etc.

[0012] The above insecticide is prepared in the form of a solution.
As the solvent for preparing the insecticide solution, any of various organic solvents, typically hydrocarbon solvents, can be used. In particular, aliphatic hydrocarbons (paraffinic hydrocarbons and unsaturated aliphatic hydrocarbons) with a boiling point range of 150 to 350°C are preferred, and among these, n-paraffin, isoparaffin, etc. are practically non-toxic, odorless, and It is suitable because the risk of fire is extremely low. Examples of organic solvents other than the above-mentioned hydrocarbons include glycols such as glycerin and propylene glycol hexylene glycol, alcohols such as methanol, isopropanol, 1-octanol, and 1-dodecanol, ketones such as acetone and acetophenone, and dihexyl ether. , ethers such as diethylene glycol diethyl ether, esters such as dioctyl adipate, diethyl malonate, and diethyl phthalate, xylene, chlorcene, chloroform, and silicone oil.

[0013] The solvent solution of the above insecticide is appropriately determined depending on the type of insecticide to be used and is not particularly limited, but the insecticide concentration is usually about 1 to 10% by weight, preferably 3 to 8% by weight. %.

[0014] The insecticidal liquid composition for liquid absorbent cores used in the present invention may contain at least one compound selected from the following compound group as an anti-clogging agent in the organic solvent solution of the insecticide. can.

3,5-di-t-butyl-4-hydroxytoluene (hereinafter referred to as CA) 3-t-butyl-4-hydroxyanisole (hereinafter referred to as CB) 3,5-di-t-butyl-4-hydroxy Anisole (hereinafter referred to as CC) Mercaptobenzimidazole (hereinafter referred to as CD) Dilauryl-thio-di-propionate (hereinafter referred to as
CE) 2,2'-methylene-bis-(6-t-butyl-
4-methylphenol) (hereinafter referred to as CF) 2,2'-methylene-bis-(6-t-butyl-
4-ethylphenol) (hereinafter referred to as CG) 4,4'-methylene-bis-(2,6-di-t-
butylphenol) (hereinafter referred to as CH) 4,4'-butylidene-bis-(6-t-butyl-3-methylphenol) (hereinafter referred to as CI) 4,4'-thio-bis-(6-t-butyl- 3-
methylphenol) (hereinafter referred to as CJ) 1,1-bis-(4-hydroxyphenyl)cyclohexane (hereinafter referred to as CK) 1,3,5-trimethyl-2,4,6-tris(3,5-di-t) -Butyl-4-hydroxybenzyl)benzene (hereinafter referred to as CL) Tris(2-methyl-4-hydroxy-5-t
-butylphenyl)butane (hereinafter referred to as CM) Tetrakis[methylene(3,5-di-t-butyl-4-hydroxyhydrocinnamate)]methane (hereinafter referred to as CN) Phenyl-β-naphthylamine (hereinafter referred to as CP) N,N '-Diphenyl-p-phenylenediamine (hereinafter referred to as CQ) 2,2,4-trimethyl-1,2-dihydroquinoline polymer (hereinafter referred to as CR) 6-ethoxy-2,2,4-trimethyl-1,
2-dihydroquinoline (hereinafter referred to as CS) 3-t-butyl-4-methoxyphenol (hereinafter referred to as CU) 2,6-di-t-butyl-4-ethylphenol (hereinafter referred to as CV) Stearyl-β-(3, 5-di-t-butyl-
4-hydroxyphenyl) propionate (hereinafter referred to as
α-tocopherol (hereinafter referred to as CX), ascorbic acid (hereinafter referred to as CY), and erythorbic acid (hereinafter referred to as CZ).

[0016] The above compounds CA to CZ may be used alone or in combination of two or more. The amount used is not particularly limited as long as the effect of preventing clogging of the liquid absorbent wick as desired in the present invention can be obtained by the combination thereof, but the amount of the insecticidal liquid composition for the liquid absorbent core of the present invention that is usually obtained is not limited. The amount is about 1.0% by weight or less in the product, usually about 0.2 to 1.0% by weight, preferably
The content is preferably 0.3 to 0.9% by weight. As a result, the effect of preventing clogging of the liquid absorbent wick over a long period of time is achieved, and the sustained insecticidal effect intended by the present invention is achieved.

[0017] The method of the present invention is carried out by applying the above-mentioned composition to a suction-type heating evaporation type insecticidal device that utilizes various conventionally known liquid-absorbing wicks, and thus achieves the above-described desired effect. obtain. The above-mentioned apparatus that can be used in the method of the present invention is, for example,
This method is described in Japanese Utility Model Application Publication No. 58-45670, etc. A specific example thereof is shown in the attached drawing.

[0018] FIG. 1 is a schematic diagram of a suction heat evaporation type insecticidal device suitable for carrying out the method of the present invention, and the device has a wick support 2 for supporting a liquid suction wick 1. A storage container 3, a liquid absorbent wick 1 inserted into the container with its upper part protruding, a hollow disk-shaped heating element 4 for indirectly heating the upper side surface thereof, and supporting the heating element 4. Support part 5 and support leg 6 for
The heating element 4 has a cord (not shown) for energizing it to generate heat.

[0019] The liquid absorbent core 1 used in the above device may be any of various commonly used materials such as felt, cotton, pulp, nonwoven fabric, asbestos, inorganic molded material, etc., such as felt core, unglazed core, Pulp cores and inorganic molded cores are preferred. Specific examples of the above-mentioned inorganic molded core include porous porcelain, glass fiber, inorganic fibers such as asbestos hardened with a binder such as gypsum or bentonite, kaolin, activated clay, etc.
Talc, diatomaceous earth, clay, perlite, bentonite, alumina, silica, alumina silica,
Mineral powders such as titanium, glassy volcanic rock fired powder, glassy volcanic ash fired powder, etc., alone or together with wood powder, charcoal powder, activated carbon, etc., are hardened with a sizing agent such as dextrin, starch, gum arabic, or synthetic glue CMC. I can give an example. A particularly preferred liquid-absorbing core is a liquid-absorbing core in which a sizing agent is added to 100 parts by weight of the above mineral powder and 10 to 300 parts by weight of a mixture of wood flour or wood flour mixed with an equal weight of charcoal powder and/or activated carbon. It is manufactured by blending the ingredients to a weight of 5 to 25% by weight, adding water to the mixture, kneading, extrusion molding, and drying. The liquid absorption core has a liquid absorption rate of 1 to 40 hours,
Preferably, it is desirable that it is 8 to 21 hours. This liquid absorption speed means that a liquid absorption core of 7 mm in diameter x 70 mm in length is placed 15 mm from the bottom of the n-paraffin liquid at a liquid temperature of 25°C.
It means the value determined by dipping the core until the n-paraffin reaches the top of the core. In addition, the liquid absorbent core contains the mineral powder,
In addition to wood flour and sizing agents, pigments such as macalite green, sorbic acid and its salts, mold inhibitors such as dehydroacetic acid, etc. can also be blended as necessary.

[0020] In addition, as the heating element used in the above device, a heating element that generates heat by normal energization is commonly used, but it is not limited to this, and for example, a heating element using an air oxidation heating material, a platinum catalyst, etc. Any known heating element such as a material may be used.

[0021] The present invention method of killing insects by applying the above-mentioned insecticidal liquid composition for a liquid-absorbing wick to the above-mentioned device is performed by heating the liquid-absorbing wick to an appropriate temperature at which the above-mentioned composition can evaporate from the liquid-absorbing wick. Implemented. The heating temperature is
It is determined appropriately depending on the type of insecticide, etc., and is not particularly limited, but usually about 70 to 150°C, preferably 135°C.
The surface temperature of the heating element is in the range of ~145℃, which corresponds to the surface temperature of the liquid absorbent core of approximately 60~135℃, preferably approximately 120~135℃.
Equivalent to 130℃.

[0022] Thus, according to the method of the present invention, the clogging of the liquid absorption wick can be reliably avoided, and the insecticide can be volatilized for a long period of time at an insecticide concentration that can exhibit a sufficient insecticidal effect.

[0023]

[Examples] Examples will be given below to explain the present invention in more detail.

【0024】

[Examples 1 to 64] Insecticide No. shown in Table 1 below.
A predetermined amount of each of AA to AU and an organic solvent, or compounds CA to CZ are further added and mixed at a predetermined mixing ratio to prepare an insecticidal liquid composition for liquid absorbent cores used in the method of the present invention (Example No. .1-78) were obtained.

【0025】

[Table 1] ■■■ Turtle shell [0001] ■■■

【0026】

[Table 2] ■■■ Turtle shell [0002] ■■■

[0027]

[Table 3] ■■■ Turtle shell [0003] ■■■

【0028】

[Table 4] ■■■ Turtle shell [0004] ■■■

[0029] The symbols in the solvent section of Table 1 indicate the following.

[0030] BA...Aliphatic hydrocarbon with a boiling point of 150-180℃/760mmHg BB...Aliphatic hydrocarbon with a boiling point of 180-210℃/760mmHg BC...Aliphatic hydrocarbon with a boiling point of 210-240℃/760mmHg BD...Aliphatic hydrocarbon with a boiling point of 240-240℃/760mmHg Aliphatic hydrocarbons with a boiling point of 270℃/760mmHg BE...aliphatic hydrocarbons with a boiling point of 270-300℃/760mmHg BF...aliphatic hydrocarbons with a boiling point of 300-350℃/760mmHg

[0031] 50ml of each of the compositions used in the present invention prepared in Examples 1 to 20 above were placed in the container 3 shown in Fig. 1, and the heating element 4 with a surface temperature of 145°C was energized to form a liquid absorbent core. Heat the upper side of 1 to a temperature of 135℃,
A transpiration test of the insecticide in the composition sample by heating was conducted. The liquid absorbent core 1 was made by adding 20 parts by weight of starch and water to 60 parts by weight of perlite and 20 parts by weight of wood flour, kneading, extrusion molding, and drying (diameter 7 mm x length 7 mm).
mm, oil absorption rate approximately 14 hours) and the heating element 4 has an inner diameter of 10
Hollow disc-shaped heating elements with a thickness of 10 mm and a thickness of 10 mm were used, respectively.

[0032] The amount of volatilization of the insecticide was determined by sucking and collecting the volatilized vapor into a silica gel column every hour, extracting the silica gel with chloroform, concentrating it, and quantitatively analyzing it using a gas chromatograph.

[0033] 10 hours after the start of heating the composition sample,
The results of the insecticide volatilization amount mg/hr per hour after 100 hours, 200 hours, 300 hours and 400 hours are shown in Table 2 below.

【0034】

[Table 5] ■■■ Turtle shell [0005] ■■■

[0035] From Table 2 above, when using the composition of the present invention, the amount of pesticide volatilization can be significantly improved, and this improved amount of volatilization can be maintained at 200% from the start of heating.
It is clear that the expression can be maintained continuously with almost no decrease even after 400 hours.

【0036】

[Comparative Example 1] A composition prepared by dissolving 1 wt% of the insecticide Prallethrin in an organic solvent BD was used as the insecticidal liquid composition, and a multi-subject liquid absorbent prepared in the same manner as in Example 1 was used as the liquid absorbent core. Using a core [80 parts by weight of perlite, 20 parts by weight of starch and water added, kneaded, extruded and dried, diameter 7 mm x length 70 mm, oil absorption rate of about 14 hours] was used in the same manner as in Example 1. 1st
50 ml of the above composition is placed in a container 3 of a device similar to the device shown in the figure, electricity is applied to the heating element 4, and various changes are made so that the surface temperature of the heating element and the surface temperature of the liquid-absorbing wick become a predetermined temperature. The liquid absorbent core 1 was heated, and a transpiration test of the insecticide in the composition was performed by heating, and the amount of insecticide volatilized per hour (mg/hr) 10, 150, and 200 hours after the start of heating was calculated. I asked for it.

[0037] The obtained results are shown in Table 3 together with the surface temperature (°C) of the heating element and the surface temperature (°C) of the liquid absorbent core used in the above test.

【0038】

[Table 6] ■■■ Turtle shell [0006] ■■■

[0039] As shown in Comparisons 1 to 6 above, when the surface temperature of the liquid absorbent wick is satisfied but the heating element temperature is outside the range of the present invention, not only is the amount of insecticide volatilized too small to reach an effective concentration, It can be seen that variations occur in the amount of volatilization. In addition, if the temperature of the heating element is satisfied but the surface temperature of the liquid absorbent core is out of the range of the present invention, as shown in Comparisons 7 to 9, the amount of pesticide volatilized is too large up to 10 hours, and conversely up to 150 hours. It can be seen that the amount of insecticide volatilized was too small during the period of 200 hours, and that almost no insecticide was volatilized until 200 hours. In contrast, it is clear that excellent effects can be obtained in the case of the present invention, which satisfies both the temperature of the heating element and the surface temperature of the liquid absorbent core.

[Brief explanation of drawings]

1 is a schematic illustration of an example of a device suitable for carrying out the method of the invention; FIG.

[Explanation of symbols] 1...Liquid absorption core 3...Insecticidal liquid composition storage container for liquid-absorbing core 4...Heating element.

Claims (7)

[Claims] Claim 1: Heating transpiration in which a part of the liquid-absorbing wick is immersed in an insecticidal liquid to cause the wick to absorb the insecticidal liquid, and the upper part of the wick is indirectly heated to evaporate the absorbed insecticidal liquid. In the insecticidal method, the surface temperature is 70 to 150℃.
A heating transpiration insecticidal method characterized by indirectly heating the upper part of the wick to a surface temperature of 135°C or less using a heating element. 2. Heating transpiration, in which a part of the liquid-absorbing wick is immersed in an insecticidal liquid to cause the wick to absorb the insecticidal liquid, and the upper part of the wick is indirectly heated to evaporate the absorbed insecticidal liquid. In the insecticidal method, as the insecticidal liquid 3-
Allyl-2-methylcyclopent-2-ene-4
-one-1-yl dl-cis/trans-chrysanthemate, d-3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-trans-chrysanthemate, 3-allyl -2-Methylcyclopent-2-en-4-one-1-yl d-trans-chrysanthemate, N-(3,
4,5,6-tetrahydrophthalimido)-methyl
dl-cis/trans-chrysanthemate,
[(R,S)-α-cyano-3-phenoxybenzyl]-(R)-2-[2-chloro-4-trifluoromethyl)anilino]-3-methyl-butanolate,
5-(2-propargyl)-3-furylmethyl chrysanthemate, 5-benzyl-3-furylmethyl d-cis/trans-chrysanthemate,
[(pentafluorophenyl)-methyl]-1R, 3R
-3-(2,2-dichloroethynyl)-2,2-dimethyl-cyclopropanecarboxylate, α-
Cyanophenoxybenzyl isopropyl-4-
Chlorophenyl acetate, 3-phenoxybenzyl 2,2-dimethyl-3-(2',2'-dichloro)vinylcyclopropane carboxylate,
3-Phenoxybenzyl d, cis/trans-
chrysanthemate, (R,S)-α-cyano-3-
Phenoxybenzyl (1R,1S)-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, α-cyano-3-phenoxybenzyl d-cis/trans -chrysanthemate, (S)-2-methyl-4-oxo-3-(2-propynyl)cyclopent-2
-enyl(1R)-cis/trans-chrysanthemate, 3-allyl-2-methylcyclopenta-2
-en-4-one-1-yl 2,2,3,3-
tetramethylcyclopropane carboxylate,
1-ethynyl-2-methyl-2-pentenyl cis/trans-chrysanthemate, 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropane- 1-carboxylate, 1-ethynyl-2-methyl-2-pentenyl 2,2,3,3
-tetramethylcyclopropanecarboxylate, 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropane-1-carboxylate,
An organic solvent containing at least one insecticide active ingredient selected from isomers such as 2,2-dimethyl-3-dichlorovinyl-cyclopropanecarboxylic acid, 2,3,5,6-tetrafluorobenzyl ester, and the like. Using a solution, the liquid-absorbing core is made by bonding the liquid-absorbing core material with a binder and/or glue, and the upper part of the wick is heated to a surface temperature of 135°C using a heating element with a surface temperature of 70 to 150°C. The heat transpiration insecticidal method according to claim 1, characterized in that indirect heating is performed to a temperature of 0.degree. C. or lower. Claim 3: The insecticidal liquid is 3,5-di-t-butyl-4-hydroxytoluene, 3-t-butyl-4
-Hydroxyanisole, 3,5-di-t-butyl-4-hydroxyanisole, mercaptobenzimidazole, dilauryl-thio-di-propionate, 3-t-butyl-4-methoxyphenol, 2,6-di- t-Butyl-4-ethylphenol, stearyl-β-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, α-tocopherol, ascorbic acid, erythorbic acid, 2,2'-methylene-bis -(6-t
-butyl-4-methylphenol), 2,2'-methylene-bis-(6-t-butyl-4-ethylphenol), 4,4'-methylene-bis-(2,6-
di-t-butylphenol), 4,4'-butylidene-bis-(6-t-butyl-3-methylphenol), 4,4'-thio-bis-(6-t-butyl-
3-methylphenol), 1,1-bis-(4-hydroxyphenyl)cyclohexane, 1,3,5
-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, tris(2-methyl-4-hydroxy-5-
t-butylphenyl)butane, tetrakis[methylene(3,5-di-t-butyl-4-hydroxyhydrocinnamate)]methane, phenyl-β-
Naphthylamine, N,N'-diphenyl-p-phenylenediamine, 2,2,4-trimethyl-
Claim 1 or 2 contains at least one compound selected from 1,2-dihydroquinoline polymer and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline. The heating transpiration insecticidal method according to item 2. 4. The organic solvent is an aliphatic hydrocarbon glycerin, propylene glycol, hexylene glycol, methanol, isopropanol, 1-octanol, 1-dodecanol, acetone, acetophenone, dihexyl ether, diethylene glycol diethyl, with a boiling point range of 150 to 350°C. Ether, dioctyl adipate, diethyl malonate,
The heat transpiration insecticidal method according to claim 2, wherein the insecticide is selected from diethyl phthalate, xylene, chlorcene, chloroform, and silicone oil. 5. The heat transpiration insecticidal method according to claim 1, wherein the liquid-absorbing wick has a liquid-absorbing rate of 40 hours or less. 6. The heat transpiration insecticidal method according to claim 4, wherein the liquid-absorbing wick is selected from a felt wick, an unglazed wick, a pulp wick, and an inorganic molded wick. 7. The liquid absorbent core is made of felt, cotton, pulp, nonwoven fabric, asbestos, porous porcelain, glass fiber, kaolin, activated clay, talc, diatomaceous earth,
clay, perlite, bentonite, alumina,
A core material selected from silica, alumina-silica, titanium, vitreous volcanic rock fired powder, and vitreous volcanic ash fired powder is hardened with a binder or sizing agent selected from gypsum, bentonite, dextrin, starch, gum arabic, and synthetic glue. A heating transpiration insecticidal method according to claim 5.