JP2001247405A - Method for controlling insect pest by thermal fumigation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling insect pests by thermal fumigation that can realize stabilized thermal fumigation of insecticidal liquid and cam achieve a stabilized insect resticidal effect despite a fact that, in the conventional thermal fumigation technique a liquid-absorbing wick is clogged with passage of the operating time and so it is difficult to attain the stabilized insect pesticidal effect and the stabilized thermal fumigation of the insecticidal liquid for a long time. SOLUTION: In this method for controlling insect pests by thermal fumigation of the insecticidal liquid, a part of a liquid-absorbing body (wick) is dipped in the insecticidal liquid and the insecticidal liquid is absorbed in the liquid- absorbing body and a part of the wick that is not dipped in the insecticidal liquid is heated to thermally fumigate the insecticidal liquid, in which an active ingredient included in the insecticidal liquid is represented by general formula 1 [wherein R is methyl group or methoxy group], the liquid-absorbing body (wick) is made of paper, cloth, a porous resin film or a porous resin sheet and the fumigation temperature for heating the wick is 60-150 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling transpiration pests by heating.

[0002]

2. Description of the Related Art Heretofore, a part of a rod-shaped absorbent core has been immersed in an insecticide to absorb the insecticide, and the rod-shaped absorbent core has not been immersed in the insecticide. A known method of controlling pests by heating is to evaporate the insecticidal liquid absorbed by heating the part.In this case, as a rod-shaped liquid absorbing core, several kinds of inorganic powders and organic powders are solidified with a glue to form a rod. A rod-shaped molded product, a product obtained by firing the rod-shaped molded product, a product obtained by adding the rod-shaped molded product and a rod-shaped porous resin are used.

[0003]

However, according to the conventional method for controlling heat-evaporative insect pests, clogging of the absorbent core occurs with the elapse of use time, and stable insecticide evaporates over a long period of time to obtain a stable insecticide. Since it is difficult to obtain the effect, there has been a demand for the development of a method for controlling the heat-penetrated insect pests, which can stably evaporate the insecticidal solution and achieve a stable insecticidal effect.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies under such circumstances, and as a result, have immersed a part of the liquid-absorbing liquid in the insecticidal liquid to cause the liquid-absorbing liquid to absorb the insecticide, A method for controlling a heat-penetrated insect pest in which a part of the liquid-absorbing liquid which is not immersed in the insecticide is heated to evaporate the absorbed liquid, wherein the active ingredient contained in the insecticide is represented by the general formula:

Embedded image [In the formula, R represents a methyl group or a methoxymethyl group. An ester compound represented by the formula:
According to the method for controlling transpiration and insect pests, which is a cloth, a porous resin film or a porous resin sheet and has a heating temperature of 60 to 150 ° C., it enables stable transpiration of the insecticidal solution and is stable for a long time. The present inventors have found that the insecticidal effect can be maintained, and have reached the present invention. That is, the present invention relates to a method of absorbing a liquid by absorbing a part of the liquid-absorbing liquid which is not immersed in the insecticidal liquid by immersing a part of the liquid-absorbing liquid in the pesticidal liquid. A method for controlling insect pests by heating, wherein the insecticidal solution is evaporated, wherein the active ingredient contained in the insecticidal solution is an ester compound represented by the general formula (2) (hereinafter, referred to as the present compound). Is a paper, a cloth, a porous resin film or a porous resin sheet, and has a heating temperature of 60 to 150 [deg.] C., and provides a method for controlling transpiration pests (hereinafter referred to as the pest control method of the present invention).

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. This compound can be produced, for example, by the following method. Formula 3

Embedded image And a carboxylic acid compound or an acid chloride thereof represented by the general formula:

Embedded image [Wherein, R represents the same meaning as described above. And an alcohol compound represented by the formula:
The reaction is usually performed in an organic solvent, if necessary, in the presence of a reaction aid. The reaction time is usually from 5 minutes to 72 minutes.
The reaction temperature is usually in the range from -80 ° C to the boiling point of the solvent used in the reaction or 200 ° C.
The molar ratio of the carboxylic acid compound represented by the formula (3) or the acid chloride thereof to the alcohol compound represented by the formula (4) is preferably equimolar or a ratio close thereto. Examples of the reaction aid include triethylamine, 4-dimethylaminopyridine, diisopropylethylamine and the like.
Secondary amine, dicyclohexylcarbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, diethyl azodicarboxylate or a reagent of diisopropyl azodicarboxylate with triphenylphosphine. Examples of the solvent include: hydrocarbons such as toluene and hexane; ethers such as diethyl ether and tetrahydrofuran; halogenated hydrocarbons such as dichloromethane and 1,2-dichloroethane; amides such as dimethylformamide; ketones such as acetone; Organic sulfurs such as dimethylsulfoxide and the like and mixtures thereof. After completion of the reaction, the compound can be obtained by performing ordinary post-treatment operations such as extraction with an organic solvent and concentration. The present compound can also be purified by an operation such as chromatography. The carboxylic acid compound represented by Formula 3 is described in J. Am. Chem.
Soc. 1076 (1970). The alcohol compound represented by the general formula (4) can be produced according to the method described in JP-A-57-123146 or JP-A-56-97251. It can be manufactured according to it.

The present compound has optical isomers (R, S) based on asymmetric carbon, geometric isomers (E, Z) based on a double bond, and geometric isomers (cis, trans) based on a cyclopropane ring. However, the present compounds include all optical isomers, geometric isomers and mixtures thereof having pest control activity.

[0007] The content of the active ingredient in the insecticidal solution used in the pest control method of the present invention is usually 0.1 to 10% by weight.
Although a sufficient pest control effect is achieved with the above-mentioned level, it can be changed depending on the use scene and the like, and can be contained at about 0.1 to 50% by weight.

The solvent for the insecticidal solution used in the present invention is usually an organic solvent, preferably a saturated hydrocarbon solvent (aliphatic saturated hydrocarbon solvent, alicyclic saturated hydrocarbon solvent).
And more preferably, the boiling point is from 180 ° C to 310 ° C.
And a solvent consisting of one or more solvents selected from saturated hydrocarbon solvents at ℃. Specific examples of such a solvent include, for example, No. 0 Solvent H (manufactured by Nippon Oil), No. 0 Solvent M (manufactured by Nippon Oil), No. 0 Solvent L (manufactured by Nippon Oil),
Normal paraffin (Mitsuishi / Texaco Chemical), Deotomisole A-1 (Yoshitomi Pharmaceutical), IP Solvent 2
028 (manufactured by Idemitsu Petrochemical), Neothiozole (manufactured by Chuo Kasei), Norper 12 (manufactured by Exxon Chemical), Norper 13
(Exxon Chemical), Norpar 15 (Exxon Chemical), Isopar M (Exxon Chemical), Isopar L
(Exxon Chemical), Isopar V (Exxon Chemical), Exol D80 (Exxon Chemical), Exol D110 (Exxon Chemical), Exol D130
(Made by Exxon Chemical). Further, in order to control the evaporation of the insecticidal solution, a solvent having a boiling point of 300 ° C. or higher and having a high boiling point, such as isopropyl laurate, dibutyl phthalate, dibutyl sebacate, acetyl tributyl citrate, esters such as medium-chain fatty acid triglyceride or Fatty acid derivatives, higher alcohols such as octyldodecanol, fats and oils such as corn oil and the like can also be blended.

If necessary, the insecticidal solution may contain a synergist such as piperonyl butoxide, N-octylbicycloheptenedicarboximide (MGK264), or an aroma, antibacterial or insect repellent component contained in plant essential oils. And a synthetic pest repellent such as Diet, a dye, a stabilizer such as dibutylhydroxytoluene (BHT), an ultraviolet absorber and the like.

The liquid absorbing material used in the present invention includes paper, cloth, a porous resin film or a porous resin sheet. More specifically, as the paper, for example, fine paper, medium paper, uncoated paper such as gravure paper, art paper, coated paper, coated paper such as lightweight coated paper, processed base paper, blotter paper, Hybrid paper such as card paper, cardboard base paper, white paperboard, yellow board, chipboard, colored paperboard, construction material base paper, paper tube base paper, paperboard such as mount paper, filter paper, packaging paper, etc., and cloth as synthetic fiber (Nylon, polyester, polypropylene, polyethylene, etc.) or natural fiber (wool, silk, cotton, hemp, etc.) woven or synthetic fiber (same as above)
Or, a non-woven fabric of natural fibers (same as above) can be used. Examples of the porous resin film or the porous resin sheet include ethylene vinyl acetate copolymer, polypropylene,
A film or sheet made by blending an inorganic substance such as calcium carbonate with a resin such as polyethylene, polyethylene terephthalate, or polyvinyl chloride, or a foamed resin such as foamed polypropylene or foamed urethane. Films or sheets are mentioned. Further, a composite material obtained by laminating paper, cloth, or the like with an olefin resin film is also included in the liquid absorption in the present invention.

In the present invention, the liquid absorbing material is usually used in the form of a flat plate, but may be used in the form of a circular or square tube. In addition, a thin wire is inserted into the liquid absorbing material as a structural core material, two flat liquid absorbing materials are attached to each other with a thin wire mesh, and a resin film laminated liquid absorbing material is attached to each other to achieve physical strength. Can be reinforced and used.

In the present invention, the container for containing the insecticidal solution is
A space for containing the insecticidal liquid is provided, and a part of the liquid absorption is present in the space. The material of the container that holds the insecticidal solution is
The insecticide to be contained is not particularly limited as long as it does not leak out at room temperature for one year or more, and is preferably a transparent material from which the amount of the insecticide can be grasped from the exterior. Examples of such a material include synthetic resins such as polyvinyl chloride, polyethylene terephthalate, polyacrylonitrile, polyethylene, and composite materials thereof.
The container for storing the insecticide solution is, for example, a synthetic resin such as polyvinyl chloride, polyethylene terephthalate, polyacrylonitrile, polyethylene, polypropylene or a composite material thereof, etc., processed into a recessed shape, and two of them are put on paper. , A cloth, a porous resin film, a porous resin sheet, or the like, and sandwiching the liquid-absorbing material. Examples of a method of processing the synthetic resin into a recessed shape include a method of processing the sheet-shaped synthetic resin by a vacuum forming method. Examples of a method of attaching the synthetic resin processed into a concave shape include a method of bonding using an adhesive, a method of heat sealing, and the like.

In the pest control method of the present invention, the liquid-absorbing liquid comprises:
Usually, the heating surface is heated by a heater at 100 to 180 ° C. At this time, the surface of the liquid absorption is heated to 60 to 150 ° C. mainly by radiant heat without contacting the heater. A commercially available liquid mosquito catcher (liquid) can be used as long as the container, the liquid absorption, the size and the shape are appropriate.

The pest control method of the present invention is carried out inside a house, a warehouse, an automobile or the like, or at an entrance such as a window.
Further, according to the pest control method of the present invention, not only an insecticidal effect but also a repellent effect and an effect of inhibiting blood sucking of blood-feeding insects can be obtained.

Examples of pests that can be controlled by the pest control method of the present invention include various pests, arthropods such as mites, and particularly harmful flying pests, ie, Culex pipiens such as Culex pipiens and Culex pipiens, Aedes aegypti ,
Aedes, such as Aedes albopictus, Anopheles, such as Anopheles chinensis, chironomid, housefly, housefly, housefly, such as house fly, blowflies, flies, Drosophila, fly, flies, flies, flies, and flies. And other dipterous insects.

[0016]

EXAMPLES The present invention will be described in more detail with reference to Production Examples, Preparation Examples and Test Examples below, but the invention is not limited thereto.

Production Example 1 (2,3,5,6-tetrafluoro-4-methoxymethylphenyl) methanol 2.24 g, pyridine 0.87
g, 20 ml of tetrahydrofuran, and (1R) -trans-2,2-dimethyl-3- under ice-cooling.
1.82 g of ((Z) -1-propenyl) cyclopropanecarboxylic acid chloride was added, and the mixture was stirred at room temperature for 8 hours. The reaction solution was poured into about 100 ml of ice water, and this was added to ethyl acetate 1
The mixture was extracted twice with 00 ml, and the combined ethyl acetate layers were washed with saturated saline, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography (developing solvent: hexane / ethyl acetate = 20/1) to give (1R) -trans-2,2-dimethyl-3-.
3.17 g of ((2,3,5,6-tetrafluoro-4-methoxymethylphenyl) methyl (the present compound 1) ((Z) -1-propenyl) cyclopropanecarboxylate (yield: 8)
8%). ¹ H-NMR (CDCl ₃ , TMS) δ 1.15 (3H,
s), 1.28 (3H, s), 1.46 (1H, d),
1.70 (3H, dd), 2.18 (1H, dd),
3.41 (3H, s), 4.59 (2H, s) 5.08
-5.12 (1H, m), 5.24 (2H, s), 5.
58-5.62 (1H, t, m)

Production Example 2 (2,3,5,6-tetrafluoro-4-methoxymethylphenyl) methanol 2.69 g, pyridine 1.04
g, 30 ml of tetrahydrofuran, and (1R) -trans-2,2-dimethyl-3- (1
-Propenyl (Z / E = 8/1)) 2.18 g of cyclopropanecarboxylic acid chloride was added, and the mixture was stirred at room temperature for 8 hours. The reaction solution was poured into about 150 ml of ice water, extracted twice with 150 ml of ethyl acetate, and the combined ethyl acetate layers were washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography (developing solvent: hexane / ethyl acetate = 20 /
(1R) -trans-2,2-dimethyl-
3- (1-propenyl (Z / E = 8/1)) cyclopropanecarboxylic acid (2,3,5,6-tetrafluoro-4
-Methoxymethylphenyl) methyl (the present compound 2) 3.
68 g (85% yield) were obtained. ¹ H-NMR (CDCl ₃ , TMS) δ 1.14 (3H,
s), ｛1.24, 1.28 (3H, s ×
2)｝, 1.45 (1H, d), 1.69 (3H, d
d), ｛2.06, 2.18 (1H, dd ×
2)｝, 3.40 (3H, s), 4.58 (2H, s)
5.08 to 5.23 (1H, m), 5.22 (2H,
s), 5.56-5.63 (1H, m).

Production Example 3 A mixed solution of 2.50 g of (2,3,5,6-tetrafluoro-4-methylphenyl) methanol, 1.53 g of pyridine and 30 ml of tetrahydrofuran was added with (1)
2.22 g of (R) -trans-2,2-dimethyl-3- (1-propenyl (Z / E = 8/1)) cyclopropanecarboxylic acid chloride was added, and the mixture was stirred at room temperature for 8 hours. The reaction solution was poured into about 150 ml of ice water, and this was added to 15 ml of ethyl acetate.
The mixture was extracted twice with 0 ml, and the combined ethyl acetate layers were washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography (developing solvent: hexane / ethyl acetate = 20/1),
(1R) -trans-2,2-dimethyl-3- (1-propenyl (Z / E = 8/1)) cyclopropanecarboxylate (2,3,5,6-tetrafluoro-4-methylphenyl) methyl (Compound 3) 3.51 g (83% yield)
I got ¹ H-NMR (CDCl ₃ , TMS) δ 1.14 (3H,
s), 1.28 (3H, s), 1.45 (1H, d, J
= 5.3), 1.70 (3H, dd, 7.0, 1..
7), 2.17 (1H, br dd, J = 8.4,5.
3), 2.28 (2H, t, J = 2.1), 5.11
(1H, ddq, J = 10.7, 8.4, 1.7),
5.20 (1H, t, J = 1.5), 5.21 (1H,
t, J = 1.5), 5.59 (1H, dqd, J = 1)
0.7, 7.0, 1.3)

Formulation Example 1 Zeklon (manufactured by Mitsui Chemicals, Inc.) is formed by a vacuum forming method, a filter paper is sandwiched therebetween, and the two molded products are heat-sealed to obtain a filter paper shown in FIGS. 1 and 2. A container with (liquid absorbing) was prepared. Also, commercially available Norper 1
Solvent (Norper 13) using 3, 15 (Exxon Chemical)
/ Norpar 15 = 7/3 w / w), and a 2% by weight solution of the present compound 2 was prepared using the solvent. 8 g of the solution was poured into a container with a syringe, the hole formed by the syringe was closed with an epoxy resin, and the epoxy resin was left to dry overnight. The container was installed in a heating device as shown in FIG.

Formulation Example 2 The procedure of Preparation Example 1 is repeated except that Compound 3 of the present invention is used in place of Compound 2 of the present invention.

Test Example 1 A glass tube (12 cm in height, 4 cm in inner diameter, 1 end on both ends) containing 10 adult female Culex pipiens pallens
(Closed with a 6-mesh nylon net). The pedestal made of the above-mentioned metal tube with a width of 7.8 cm was passed over the upper part of a test cylinder having a height of 80 cm and a diameter of 20 cm, and a center portion thereof was passed at a width of 7.8 cm. This pedestal has a diameter of 4 cm, the same as the inner diameter of the glass tube, at a position 4 cm from the center of the cylinder.
Are symmetrically opened, and the glass tube containing the adult Culex pipiens is placed on the pedestal so that the airflow from under the test cylinder passes through the glass tube. A transparent resin cylinder for observation having a diameter of 20 cm and a height of 30 cm was set on the upper part of the test cylinder so that the outer diameters of the two overlapped.

A small draft was prepared on the side of the test cylinder, and the heated transpiration pest control device 1 (heating surface temperature: 75 to 110 ° C.) prepared in Preparation Example 1 was placed in the small draft to start heating. After heating for 78 hours, the heater was moved to the bottom of the test cylinder and heated for 20 minutes. The number of the knocked-down female Culex pipiens at every elapsed time was counted, and the time (KT50 value) at which 50% of the tested female Culex pipiens was knocked down was determined (2 repetitions). After a lapse of 20 minutes, the heater was transferred to a small draft and heating was continued. Also, remove the glass tube from the cylinder and place the glass tube on gauze containing 5% sugar water as bait,
The mortality of adult female Culex pipiens was observed after 1 day under breeding conditions. After 156 hours of heating, the heater was moved to the bottom of the metal cylinder again, and the test was performed in the same manner as after 78 hours of heating.

[0024]

[Table 1] After that, when the heating was further continued, the insecticide was evaporated steadily, and almost all the insecticide was evaporated 610 hours after heating (equivalent to 2 months when used for 10 hours a day).

Test Example 2 All tests were conducted in the same manner as in Test Example 1 except that the heated transpiration pest control device 1 was used instead of the heat transpiration pest control device 1.
Excellent pest control effect can be obtained.

[0026]

According to the pest control method of the present invention, it is possible to stably evaporate the insecticidal solution and maintain a stable insecticidal effect for a long time.

[Brief description of the drawings]

FIG. 1 shows an example of a container used in the method for controlling pest pests by heating according to the present invention, and is a projected view of the container.

FIG. 2 is a cross-sectional view in a state where a chemical solution is placed in the container shown in FIG.

FIG. 3 is a cross-sectional view of an example of an apparatus used in the method for controlling pest pests by heating according to the present invention.

4 is a perspective view of the device shown in FIG.

[0027]

[Explanation of symbols]

 1. Filter paper, 2. Heater, 3. Chemical solution

Claims (3)

[Claims] 1. A method of immersing a part of a liquid-absorbing liquid in an insecticide to absorb the insecticide in the liquid-absorbing liquid, and heating the part of the liquid-absorbing liquid not immersed in the insecticide to absorb the liquid. The present invention relates to a method for controlling a heat-penetrated insect pest by evaporating an insecticidal solution, wherein the active ingredient contained in the insecticide solution is represented by the following general formula 1. [In the formula, R represents a methyl group or a methoxymethyl group. An ester compound represented by the formula:
A method for controlling heat-evaporating insect pests, which is a cloth, a porous resin film or a porous resin sheet, and has a heating temperature of 60 to 150 ° C. 2. The method according to claim 1, wherein the liquid-absorbing liquid is a flat plate having a thickness of 3 mm or less. 3. The method according to claim 1, wherein the liquid absorption is paper.