JP2007082553A - Method for spraying water-soluble insecticide, aerosol spraying device and insecticidal liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for evaporating a water-soluble insecticide enabling efficient evaporation of even a water-soluble insecticide liable to be decomposed with heat or having low vapor pressure, having high stability of the liquid, suppressing the increase of production cost and decreasing the odor, a method for spraying the insecticide, an ultrasonic atomization device, an aerosol spraying device, an insecticidal liquid and its composition. <P>SOLUTION: An insecticidal liquid produced by dissolving a water-soluble insecticide in water is evaporated or sprayed by an ultrasonic atomization device or an aerosol spraying device. The median of the particle diameters of the evaporated or sprayed insecticidal liquid is adjusted to 3-8 μm. The ultrasonic atomization device to be used in the evaporation method is provided with a vessel 1 holding the insecticidal liquid 2, a liquid sucking wick 3 protruding its upper part from the upper opening of the vessel 1 and immersing its lower part in the insecticidal liquid 2 in the vessel 1, and an ultrasonic transducer 5 placed in contact with or close to the upper end of the liquid sucking wick 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The invention, how to mists efficiently by rather an insecticidal liquid, et azole spraying device and insecticidal liquid or a composition, methods pest control, to further resistant cockroach control composition.

  Conventional methods for evaporating insecticides for pest control include sucking insecticides using a liquid absorbent wick and evaporating them, and heating insecticides adsorbed on a porous substrate (solid mat) such as fiberboard. There are known a method of volatilizing the insecticide and a method of volatilizing the insecticide by wind power generated by the rotation of a fan. However, the heating transpiration method has a problem that an insecticide which is easily pyrolyzed cannot be used because the heating temperature is high. Moreover, in the volatilization method by wind power, there exists a problem that an insecticide with a low vapor pressure is hard to volatilize.

  On the other hand, a method has been proposed in which an insecticide containing an oil-soluble insecticide is evaporated by an ultrasonic oscillator (see Patent Document 1 and Patent Document 2). The insecticide is used in the form of an emulsion obtained by dissolving or dispersing an oil-soluble insecticide in an organic solvent such as kerosene, or using water as a solvent and emulsifying the insecticide. However, the insecticide emulsion is inferior in stability, increases the cost due to the use of a surfactant, and has a unique odor.

  Similarly to the above, an ultrasonic liquid evaporator that evaporates insecticides and fragrances using ultrasonic waves has also been proposed (see Patent Document 3). However, there is no specific description of insecticides or fragrances in this document.

Japanese Patent Publication No.57-61388 JP-A-52-660 JP-A-8-215308

Therefore, the present invention can efficiently volatilize even an insecticide that is easily pyrolyzed and a water-soluble insecticide with a low vapor pressure, has high liquid stability, can suppress cost increase, and reduces odor. mists how pesticidal solution which can, d azole spraying device and insecticidal liquid or a composition, and to provide a more resistant cockroach control composition.

Transpiration method described water-soluble pesticide is characterized by causing an insecticidal solution containing as an active ingredient a water-soluble insecticide transpiration by the ultrasonic atomization device. In this method , since the insecticide is atomized and evaporated by applying ultrasonic vibration to the insecticide, it can be volatilized efficiently even with an insecticide that is easily decomposed by heat or an insecticide with a low vapor pressure. Since the diffusibility is also excellent, an excellent insecticidal effect can be obtained. In addition, since the insecticide is a solution form containing a water-soluble insecticide as an active ingredient, it is more stable than an emulsion, does not require a surfactant, and, for example, uses water for some or all of the solvent. As a result, there is almost no odor and the safety against fire is increased.

Another transpiration method using an ultrasonic atomizer, which will be described later , is characterized in that the particle size of the pesticidal insecticidal liquid is 3 to 8 μm. Still another insecticide transpiration method to be described later is characterized in that an insecticide base or an additive base obtained by adding an additive to the base is evaporated by an ultrasonic atomizer. The pesticides, raw materials or additive raw materials used in these other transpiration methods are not limited to water solubility, but can be used even if they are oil soluble.

The method for spraying an insecticide according to the present invention is characterized in that an insecticide containing a water-soluble insecticide as an active ingredient is sprayed by an aerosol spray device. In this spraying method, an insecticide that is easily decomposed by heat or a water-soluble insecticide having a low vapor pressure can be efficiently vaporized. And, since excellent in diffusivity, it is possible to obtain an excellent insecticidal effect. In addition, since the insecticide is a solution form containing a water-soluble insecticide as an active ingredient, it is more stable than an emulsion, does not require a surfactant, and, for example, uses water for some or all of the solvent. As a result, there is almost no odor and the safety against fire is increased.

  Another spraying method using the aerosol spraying device according to the present invention is characterized in that the particle size of the sprayed insecticide is 3 to 8 μm. Here, the insecticide used is not limited to water solubility, and can be used even if it is oil-soluble.

An ultrasonic atomizer described later is an apparatus for use in the above transpiration method, and a container containing an insecticide or an insecticide active substance or an additive substance, and an insecticide or insecticide in the container. And an ultrasonic vibrator for evaporating (volatilizing) the active ingredient or the added active ingredient. Such an ultrasonic atomizer described later preferably includes a fan for diffusing the evaporated insecticide component. Furthermore, a liquid for vibration transmission is interposed between the container and the ultrasonic vibrator, and vibration is applied to the insecticide liquid in the container through this liquid to evaporate (volatilize) the active ingredient in the insecticide liquid. ).

Another ultrasonic atomizer described later is an apparatus for use in the above transpiration method, and a container containing an insecticide, an upper portion projects from the upper opening of the container, and a lower portion serves as the insecticide in the container. It is characterized by comprising an immersed liquid absorption core and an ultrasonic transducer adjacent to the liquid absorption core without contacting or directly contacting the upper end portion thereof.

An aerosol spraying apparatus according to the present invention is an apparatus for use in the spraying method described above, and is an aerosol container containing an insecticidal solution, and a spray attached to the upper opening of the aerosol container for spraying the insecticidal solution. Means.

Insecticidal solution for mists that written to the present invention is a water-soluble pesticide as an active ingredient, dissolving the insecticide water, an organic solvent or a mixture thereof. Examples of the water-soluble insecticide include 1-methyl-2-nitro-3- (tetrahydro-3-furylmethyl) guanidine (generic name: dinotefuran).
The spray insecticidal composition according to the present invention comprises a water-soluble insecticide as an active ingredient, an insecticide obtained by dissolving the insecticide in water, an organic solvent or a mixture thereof, and a propellant. It is characterized by doing.

（式中、Ｒは炭素数１〜６のアルキル基、ｍおよびｎは同一または異なる０〜６の整数である。ただし、ｍおよびｎは同時に０ではない。） Further, in the present invention, when at least one of the following components (1) to (4) is contained as an efficacy enhancer together with the water-soluble insecticide, a higher insecticidal effect can be obtained.
(1) 3- (2-Chloro-1,3-thiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-one (generic name: thiamethoxam)
(2) (E) -N ¹ -[(6-Chloro-3-pyridyl) methyl] -N ² -cyano-N ¹ -methylacetamidine (generic name: acetamiprid)
(3) 2-Isopropoxyphenyl-N-methylcarbamate (generic name: propoxur) (4) d, d-T-cyphenothrin Further, the spray insecticidal composition of the present invention is a furanyl water-soluble insecticide. And a solvent, wherein the solvent is at least one selected from water, a compound represented by the following general formula (1), and a lower alcohol.

(In the formula, R is an alkyl group having 1 to 6 carbon atoms, and m and n are the same or different integers of 0 to 6. However, m and n are not 0 at the same time.)

  In particular, the insecticide composition of the present invention contains a furanyl-based water-soluble insecticide and a solvent, the solvent contains water and diethylene glycol monobutyl ether (hereinafter referred to as BDG), and the blending ratio of BDG in the solvent is 40 to 40. It is preferably 20% by weight.

The pesticidal solution composition, e azo - high pest control effect by being mists with Le is obtained. Excellent cockroach control effect. When the insecticide composition is sprayed using an aerosol, it is preferable to use, for example, dimethyl ether (DME) or liquefied petroleum gas (LPG) as the spray.
Resistant cockroach control composition of the present invention, containing a composition for use in the spray method of the present invention, 1-methyl-2-nitro-3- (tetrahydro-3-furylmethyl) guanidine) as an active ingredient To do. It is preferable to contain at least one of the above components (1) to (4) as an efficacy enhancer for this active ingredient.

  According to the present invention, even an insecticide that is easily pyrolyzed and an insecticide with a low vapor pressure can be efficiently vaporized, and also has excellent diffusibility, so that an excellent insecticidal effect can be obtained. There is.

Hereinafter, the present invention will be described in detail.
First, as a reference, that describes an ultrasonic atomizer used in this method and ultrasonic transpiration process.
<Ultrasonic transpiration method>
In the transpiration method described later , an insecticide (for example, an insecticide solution in which a water-soluble insecticide described later is dissolved in water, a solvent composed of an organic solvent or a mixture thereof) is evaporated by an ultrasonic atomizer. .

In addition, an ultrasonic atomizer is used for an insecticide base described later or an additive base obtained by adding an additive to the base. May be evaporated.

In the ultrasonic transpiration method described above, one or more insecticides described above are dissolved in water, an organic solvent or a mixture thereof, preferably water or a solvent containing water, and the resulting insecticide is subjected to ultrasonic waves. The insecticide is atomized by applying vibration with the atomizer and evaporated to the atmosphere. The concentration of the insecticide in this insecticide is 0.3 to 30% by weight, preferably 0.5 to 10% by weight.

<Ultrasonic atomizer>
As an apparatus for use in the transpiration method, for example, an ultrasonic atomizing apparatus as shown in FIG. 1 can be used. As shown in the figure, this ultrasonic atomizer includes a container 1 containing an insecticidal solution 2 and a liquid absorbing material in which the upper part protrudes from the upper opening of the container 1 and the lower part is immersed in the insecticidal liquid 2 in the container 1. A core 3, an ultrasonic vibrator 5 in contact with the upper end of the liquid absorbent core 3, and an ultrasonic oscillator 7 connected to the vibrator 5 are provided. A joining piece 6 made of metal, ceramic or the like is disposed between the upper end portion of the liquid absorbent core 3 and the vibrator 5, whereby the vibrator 5 is indirectly attached to the liquid absorbent core 3 (via the joint piece 6). ) Touching. Reference numeral 8 denotes a battery as a power source. A means for supporting the oscillator 7 may be provided separately. The liquid absorbent core 3 is supported by a hollow disk type core support 4 fitted in the upper opening of the container 1.
The ultrasonic atomizer may adjust the waveform with an arbitrary waveform generator. Thus, the transpiration according to the type of the raw material, additive raw material, insecticide containing a solvent (such as water) or the like may be performed by arbitrarily changing the frequency. As the waveform generator, a waveform generator whose frequency can be arbitrarily changed from 0.1 Hz to 300 MHz is commercially available. Instead of the arbitrary waveform generator, a frequency converter may be used.

Also, in the above evaporation process, it is also possible to use the ultrasonic atomization apparatus shown in FIG. 2, for example. The ultrasonic atomizer includes a container 11 containing an insecticidal solution 10, a liquid absorbent core 12 having an upper part protruding from an upper opening of the container 11 and a lower part immersed in the insecticidal liquid 10 in the container 11, and the liquid absorbent. An ultrasonic transducer 14 having a horn structure close to the core 12 without directly contacting the upper end portion thereof, and an ultrasonic oscillator 15 connected to the transducer 14 are provided. The liquid absorbent core 12 is supported by a hollow disk-shaped core support 13 fitted into the upper opening of the container 11.

Furthermore, normal commercially available ultrasonic humidifier (e.g. Eco Dream Co., Ltd. under the trade name "Dream 21", etc. Toyotomi Co., Ltd. under the trade name "TUH-5") can also be used as an ultrasonic atomization apparatus. An example of the ultrasonic atomizer using such an ultrasonic humidifier is shown in FIG. In this ultrasonic atomizer, a liquid supply tank 71 containing an insecticidal solution is detachably installed in the body 70, and an insecticidal solution 72 is guided from the bottom of the liquid supply tank 71 to the transpiration unit 73.

  The transpiration unit 73 has a bottomed cylindrical shape, and the bottom part is a liquid reservoir part 74 for storing the insecticidal liquid 72 flowing out from the bottom part of the liquid supply tank 71. An inner cylinder 75 is installed above the liquid reservoir 74, and a gap between the inner cylinder 75 and the inner surface of the outer wall of the transpiration unit 73 is closed by a shielding plate 76. A slit 77 for preventing droplets from scattering is attached to the upper portion of the inner cylinder 75. An air blowing cylinder 78 that rises beyond the liquid reservoir 74 is provided at the bottom of the transpiration unit 73. An element (vibrator) 79 of an ultrasonic transmitter is attached to the bottom outer surface of the transpiration unit 73 below the inner cylinder 75.

  A sirocco fan 80 is installed at the bottom of the ultrasonic atomizing device that communicates with the air blowing cylinder 78, and takes air from an intake port 81 provided in the body 70 and supplies the air toward the blowing cylinder 78. To do. The air blown into the transpiration unit 73 from the blowing cylinder 78 is sent into the inner cylinder 75 through the gap between the liquid reservoir 72 and the inner cylinder 75, as indicated by an arrow, and from the inner cylinder 75 to the container body 70. It is discharged outside. At this time, the fine particles of the insecticidal liquid 72 atomized by the ultrasonic waves generated by the vibration of the element 79 are carried outside by the air 70 and diffused over a wide range.

  Incidentally, the container body 70 is 270 mm long, 200 mm wide, and 300 mm high from the floor, the depth of the liquid reservoir 72 is 30 mm, and the surface of the liquid reservoir 72 to the discharge port 81 above the container 70 is provided. The height is 220 mm. The sirocco fan 80 normally has a diameter of 50 mm × 28 mm, 20 blades, a fan rotational speed of about 1882 to 2673 rpm, and an air volume of about 1.2 to 1.4 L / sec.

  In addition, as a blowing means for diffusing fine particles atomized by ultrasonic waves into the room, for example, a propeller fan, a piezo fan, or the like can be used in addition to the above-described sirocco fan. Moreover, the air volume of a fan should just be in the range of 0.1-40 L / sec.

For reference, FIG. 4 shows still another example of an ultrasonic atomizer to which the above transpiration method can be applied. As shown in FIG. 4, this ultrasonic atomizer has a tank 84 filled with vibration transmission liquid 94 (for example, water) in a vessel 83, and an element of an ultrasonic transmitter is provided at the bottom of the tank 84. A (vibrator) 85 is attached. Above that, an insecticide container 87 containing an insecticide 86 is located. The insecticidal solution container 87 is dropped into an opening provided in a lid 88 that closes the upper portion of the tank 83, and the upper flange portion 87a is locked to the periphery of the opening. The ultrasonic wave generated by the vibration of the element 85 reaches the upper insecticidal solution container 87 through the vibration transmitting liquid 94 and volatilizes the insecticidal solution 86 in the container.

  A hood 89 for adjusting the volatilization amount is attached to the top of the insecticidal solution container 87. The hood 89 has a hole 90 through which the volatilized insecticide particles pass. The hood 89 is covered with a cover 91. A sirocco fan 92 is attached to the side of the cover 91, and a volatilizing cylinder 93 is attached to the top. The lower end of the cylindrical body 93 is located near the hood 89.

  The air blown into the cover 91 from the sirocco fan 92 is discharged to the outside through the cylindrical body 93 as indicated by an arrow. At this time, the fine particles 95 of the insecticidal solution 86 atomized by the ultrasonic waves generated by the vibration of the element 85 are carried to the outside through the cylinder 93 by the air, and the venturi function (action) is also diffused over a wide range.

  In this way, the vibration transmitting liquid 94 is interposed between the container 87 and the element 85 (ultrasonic vibrator), and the insecticidal solution 86 in the container 87 is vibrated through the liquid 94 to thereby kill the insects. The active ingredient in the liquid 86 is volatilized. For this reason, even if the element 85 is driven for a long time, the element 85 is always cooled by the vibration transmission liquid 94, so that it can be prevented from being damaged by overheating.

  In FIG. 4, the element 85 and the insecticide container 87 are attached in an inclined posture, but may be in a vertical posture. Further, it is the same as described above that various fans can be used instead of the sirocco fan 92.

  In addition, in the ultrasonic atomizer shown in FIG. 4, an insecticide container 87 ′ as shown in FIG. 5 may be used instead of the insecticide container 87 with the hood 89. Since the inner top surface of the insecticidal solution container 87 ′ also serves as the hood 89, there is no need to bother the hood 89. The insecticide container 87 ′ is attached to the lid 88 above the element 85 ′, and a hole 90 ′ through which the volatilized insecticide particles pass is formed on the peripheral wall above the lid 88. The other components are the same as those shown in FIG. Although the insecticidal solution container 87 'is in a vertical posture, it goes without saying that it may be in an inclined posture.

<Spraying method>
In the spraying method according to the present invention, an insecticide obtained by dissolving an insecticide (for example, a water-soluble insecticide) in water, an organic solvent or a solvent composed of a mixture thereof (preferably a solvent containing water or water) is aerosol sprayed. It is sprayed by the device.

The insecticide is not particularly limited as long as it has an insecticidal action against pests, and preferably has a vapor pressure of 1 × 10 ⁻³ to 1 × 10 ⁻⁹ mmHg, more preferably 1 × 10 ⁻⁵ to 1 × 10 ^−. good to Ru ⁸ mmHg der. Examples of such a pesticide under the common name, Jinote furan an insecticide furanyl system (chemical name: (RS)-1-methyl-2-nitro-3- (tetrahydro-3-furylmethyl) guanidine), d, d-T-cyphenothrin (chemical name: alpha-cyano-3-phenol Kishibenjiru (+) cis / trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate) , trichlorfon, cartap, Asetamipuri de, imidacloprid (imidacloprid, manufactured by Japan Bayer Agrochem Co., Ltd.), nitenpyram (N itenpyram, manufactured by Sumitomo Chemical Takeda Agro Co., Ltd.), thiacloprid (thiacloprid, manufactured by Japan Bayer UGG Roque-time Co., Ltd.), clothianidin (Clotianidin, Sumika Takeda Agrochemicals), Thiamethoxam (Thiamet hoxam, manufactured by Syngenta), Propoxur (produced by Bayer Yakuhin) , Pimetoroji down (Pymetrozine, manufactured by Syngenta), (manufactured by Sumitomo Chemical Co., Ltd.) fenitrothion, (Bayer) Fenchio down, metofluthrin (manufactured by Sumitomo Chemical Co., Ltd.), amidoflumet (manufactured by Sumitomo Chemical Co., Ltd.) and the like, of 1 Species or a combination of two or more can be used.

In particular, the dinotefuran includes water, a compound represented by the general formula (1) and a lower alcohol. By using it dissolved in a solvent consisting of at least one kind of An insecticidal effect is obtained. Examples of the compound represented by the general formula (1) include ethylene glycol. Recall monoethyl ether, diethylene glycol monobutyl ether (BDG), di Ethylene glycol monoethyl ether, propylene glycol monomethyl ether, etc. Is mentioned. Examples of the lower alcohol include methanol, ethanol, and 1-propyl. Lopanol, 2-propanol, n-butanol, n-hexanol, n-octanol C 1-6 lower monoalcohol such as cyclohexanol, preferably ethanol 1-propanol or 2-propanol.

  Furthermore, other solvents may be used, for example alcohols such as benzyl alcohol; Hydrocarbons such as ruene, hexane, benzene, xylene, liquid paraffin; Ethers such as ethers; ketones such as acetone and diacetone alcohol, or alde Hydrides: diethyl adipate, butyl benzoate, ethyl acetate, propyl acetate, propylene carbonate Len, dibutyl sebacate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, Esters such as hexyl laurate and γ-butyrolactone; ethylene glycol, ethyl Lenglycol diacetate, diethylene glycol diethyl ether, dipropylene glycol Recall, triethylene glycol, tripropylene glycol, 1,4-butanedio And polyhydric alcohols such as polypropylene glycol or derivatives thereof; N, N-dimethyl Nitrogen-containing compounds such as tilformamide; sulfur-containing compounds such as dimethyl sulfoxide It can be used. These may be used alone or in combination of two or more. Mixed with at least one of water, a compound represented by the general formula (1) and a lower alcohol May be used.

  Use at least one of water, a compound represented by the general formula (1) and a lower alcohol In this case, as a synergist (solvent) for dissolving dinotefuran crystals, for example, Zyl alcohol, propylene carbonate, ethylene glycol, propylene glycol, adip Diisopropyl acid, isopropyl myristate, etc. can be used.
  In addition, when water and an organic solvent are mixed, the ratio of water in the total solvent is 50% by weight or more. Is preferred.

  Furthermore, in the present invention, together with the above-mentioned dinotefuran, thiamethoxam, When at least one of cetamiprid and propoxur is added, insecticidal efficacy, The insecticidal efficacy against a cockroach can be greatly improved. The compounding ratio of the above potentiator is Although not particularly limited, it is 0.05 to 10% by weight with respect to the total amount of insecticide, preferably It is good that it is 0.1 to 5% by weight.

  The obtained insecticidal solution is filled in an aerosol spraying device described later together with a propellant. Examples of the propellant include liquefied petroleum gas, propane, propylene, n-butane, isobutane, butadiene, n-butylene, isobutylene, n-pentane, isopentane, n-hexane, isohexane, dimethyl ether, ethyl ether, carbon dioxide gas, and nitrogen gas. Compressed gas, CFC substitute gas, etc.

  Insecticide and propellant are usually pressurized and filled into an aerosol spray device. In the spraying insecticide composition containing the filled insecticide and the propellant, for example, the propellant is 50% by volume or more, preferably 70% by volume or more, more preferably 80 to 97% by volume, and still more preferably. It is good to contain 85-95 volume%. Moreover, you may mix | blend a raw material and an addition raw material with a propellant.

The particle diameter of the sprayed insecticide solution, median particle diameter of that is may be between 3 to 8 [mu] m. Although it can be said that one general desirable as particles smaller in terms of diffusivity, high diffusivity can be obtained even if a relatively large particle diameter of 3~8μm the present invention. Thus, it is possible to decrease the energy costs low. If the median particle diameter exceeds 8 μm, the diffusibility in the air may be reduced . Here, median particle diameter (also known as average particle diameter, the Sauter mean diameter or body area flat Hitoshi径) is obtained from the following equation.

In place of the insecticidal solution, the same insecticide base as described above or an additive base obtained by adding an additive to the same is filled into an aerosol spraying device together with a propellant, and the aerosol spraying device is used. It is also possible to spray a small amount. Here, the active ingredient of the insecticide means an insecticide ingredient itself that does not contain a solvent, and may be a mixture of two or more insecticide ingredients. The additive base is one or more additives selected from stabilizers, antioxidants, UV inhibitors, dyes, antifungal agents, antifreeze agents, pH adjusters, and the like. It means the one added . These one or more additives are preferably added to the insecticide . In particular, it is preferable to add an antifungal agent, an antifreezing agent and a pH adjuster to the water-soluble insecticide.

  In addition to the water-soluble insecticides described above, N- [chloro-3-pi Lysylmethyl] -N-ethyl-N-methyl-2-nitrovinylidenediamine, 3-[(2 -Chloro-5-thiazolyl) methyl] -5-methyl-nitroiminotetrahydro-1,3 , 5-oxadiazine ", d, d-T-cyphenothrin and the like. Still other killings Regardless of whether the drug substance is solid, crystalline, liquid, or liquid, the pyrethroid system is used as much as possible. Compound insect repellent extract, pyrethrin, d-areslin, phthalthrin, framethrin, plastic Letrin, terrareslin, resmethrin, permethrin, phenothrin, cypermetry , Cyphenothrin, transfluthrin, fenfluthrin, empentrin, and And their isomers, analogs, derivatives, organophosphorus compounds such as pyrimiphos methyl, fenitro Thione, metfurthrin, pyridafenthione, carbamate compound propoxur, Carbaryl, oxadiazole-based compound methoxadiazone, S-1295, imiproto Insecticides and acaricides such as phosphorus and fipronil, metoprene, S-hydroprene, pyri Proxyphen, 2- [1-methyl-2- (phenoxyphenoxy) ethoxy] pyridine Insect juvenile hormones such as diflubenzuron, teflubenzuron and other chitin formation inhibitors And pest repellents such as amide compound dates.

<Aerosol spray device>
As an apparatus for use in the spraying method, for example, an aerosol spraying apparatus (full-volume injection type) shown in FIGS. 6 to 9 can be used. FIG. 6 is a partial cross-sectional view of an aerosol spray device according to an embodiment of the present invention, and FIG. 7 is a plan view thereof.

  As shown in FIG. 6, the aerosol spray device 30 includes an aerosol container 21 containing an insecticidal solution and a spray means 31 attached to a winding portion 22 of an upper opening of the container 21. The spray means 31 includes a button portion 32 that covers the stem 23 of the aerosol container 21 and a pressing portion (operation portion) 36 that extends from the button portion 32 in a substantially horizontal direction. The button part 32 has a hollow part and a solid part, but the first insertion is arranged on the lower surface of the solid part, just above the stem 23 and the tip of the stem 23 is inserted. A hole 35a is provided. On the other hand, a second insertion hole 35 b into which the nozzle member 40 is inserted is provided on the upper surface of the solid portion of the button portion 32. Here, the 2nd insertion hole 35b inclines so that it may leave | separate from the press part 36 as it goes up from the bottom. The first insertion hole 35 a and the second insertion hole 35 b are circular holes having a circular cross section, and communicate with each other inside the solid portion of the button portion 32.

  When the pressing part 36 is pushed down by a foot or the like, the button part 32 pushes down the stem 23. The insecticide ejected from the stem orifice of the stem 23 passes through the inside of the nozzle member 40 and is sprayed from the tip of the nozzle member 40 to the outside.

  As shown in FIG. 7, the tip surface of the nozzle member 40 has an elliptical shape. A central nozzle 41 is provided on the tip surface, and peripheral nozzles 42 a and 42 b are provided on both sides of the central nozzle 41 on the elliptical long axis. The central nozzle 41 and the peripheral nozzles 42a and 42b communicate with the stem orifice of the stem 23 shown in FIG.

Opening area of the central nozzle 41 is a 0.2 mm ² or more, it is preferable that the 0.2 to 0.4 mm ^2. Then, the opening areas of the peripheral nozzles 42a and 42b are the same or so that the value obtained by dividing the opening area of the central nozzle 41 by the sum of the opening areas of the two peripheral nozzles 42a and 42b is 0.5 to 1.0. It is set almost the same. For example, the sum of the opening areas of the peripheral nozzles 42a and 42b can be 0.3 to 0.5 mm ² . The opening area of the stem orifice of the stem 23 is a 0.3 mm ² or more, it is preferable that the 0.3 to 0.6 mm ^2.

  As shown in FIG. 6, the tip surface of the nozzle member 40 is inclined so that the aerosol content is sprayed on the side opposite to the pressing portion 36 side. This spraying means 31 is of a so-called full-injection type in which the stem 23 is kept pressed or tilted once the pressing part 36 is pushed down with the foot F or the like.

  FIG. 8 is an exploded side view of the nozzle member 40, and FIG. 9 is an exploded plan view of the nozzle member 40. The nozzle member 40 is configured by combining two members, a main body 48 and an insertion body 44, for ease of manufacture. As shown in FIG. 8, the main body 48 has a configuration in which an elliptical plate portion 48a is integrally formed on the large diameter side (tip side) of the stepped cylindrical member. The hole 49 penetrating the main body 48 communicates with the first portion 49a penetrating the small diameter portion of the main body 48, the second portion 49b communicating with the first portion 49a and penetrating the large diameter portion of the main body 48, and the second portion 49b. And a tapered third portion 49 c provided on the elliptical plate portion 48 a of the main body 48.

  The insertion body 44 is inserted into the hole 49 of the main body 48 from the front end surface side of the main body 48 so that the front end surface of the insertion body 44 is flush with the front end surface of the main body 48. The insert 44 has an outer peripheral surface corresponding to the second portion 49 b and the third portion 49 c of the hole 49 of the main body 48. The outer peripheral surface is in close contact with the inner peripheral surfaces of the second portion 49b and the third portion 49c of the hole 49 of the main body 48 except for grooves 47a and 47b described later. The insertion body 44 is provided with a central nozzle 41 that penetrates the insertion body 44.

  As shown in FIG. 9, the main body 48 is provided with grooves (here, square grooves) 47a and 47b. The grooves 47a and 47b continuously extend in the vertical direction from the front end surface of the main body 48 to the inner peripheral surface of the third portion 49c of the hole 49 and the inner peripheral surface of the second portion 49b. When the insertion body 44 is inserted into the main body 48, the peripheral nozzles 42 a and 42 b as shown in FIG. 7 are partitioned by the grooves 47 a and 47 b of the main body 48 and the outer peripheral surface of the insertion body 44.

  According to the aerosol device 30 to which the spraying means 31 having the above configuration is attached, the aerosol contents can be sprayed in a very wide range. Moreover, according to this aerosol apparatus 30, the aerosol content sprayed indoors etc. falls in a sufficient amount on the wide range of the floor of the room. Therefore, it can be suitably used for the control of pests and molds that inhabit the floor such as cockroaches and fleas.

  In the spraying method of the present invention, for example, an aerosol spraying device as shown in FIG. 10 can be used. This aerosol spraying device includes an aerosol container 51 containing an insecticidal solution 53 and an aerosol valve (spraying means) 52 that is attached to the upper opening of the aerosol container 51 and atomizes the insecticidal solution 53.

  The aerosol valve 52 is connected and sealed with an upper opening of the aerosol container 51 in which the insecticide 53 is accommodated by a gasket rubber 54. The dip tube 55 of the aerosol valve 52 is immersed in the insecticidal solution 53. When the button 56 of the aerosol valve 52 is pushed, the stem 57 is pushed into the housing 58 and the spring 59 contracts. At this time, the convex portion of the stem 57 pushes down the stem rubber 60, and the stem hole 61 opens into the gap 62. As a result, the insecticide 53 passes through the dip tube 55, passes through the tube inside the stem 57, and is injected into the atmosphere from the nozzle 63.

  Further, the aerosol valve 52 has a push button 56 having an injection port diameter of 0.3 to 1.0 mm, an inner diameter of the stem 57 of 0.3 to 0.6 mm, an inner diameter of an under tap of 0.3 to 2.2 mm, and a dip tube. The inner diameter of 55 is preferably 0.5 to 4 mm. If necessary, the vapor tap is 0.2 to 0.6 mm. Furthermore, structurally, since suspended particles are included in the liquid, there are two or more stem holes for increasing the injection amount, or a protrusion that prevents the inhibition of stem rubber recovery due to accumulation of silicate compounds is provided. In addition, it is preferable that various contrivances such as putting metal balls into a pressure-resistant container are prepared in case the silicate compound is aggregated.

In the method of the present invention, in addition to the insecticides described above, additives such as fragrances, lubricants, bactericides, dyes, moisturizers, stabilizers, volatilization regulators, antiseptics, antioxidants and the like are added to the insecticide. It can also be contained.
In addition, the method of the present invention includes sanitary pests such as cockroaches, flies, mosquitoes, mosquitoes, flies, fleas, peanuts, clothing pests such as moths and carp, stored-pests such as moss, weevil, house mite, claw mites. , Mites such as spider mites, arachnids, ants, termites, slugs, barley beetles, snails, stink bugs, centipedes, geijigeji, bees, flyfish, etc. Is possible. Therefore, the method of the present invention can be used in various places, for example, in living rooms, kitchens, canteens; barns, kennels, agricultural and horticultural houses; storages for clothes such as closets and chants, plant storages, etc. It can be preferably used.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited only to a following example.
[Reference Example 1]
Insecticidal solution was evaporated by an ultrasonic atomizing device described above and it was confirmed insecticidal effect of the above-mentioned ultrasonic vapor diffusing method for following test insects.

<Preparation of insecticide>
An insecticide was prepared by dissolving an insecticide (the above-mentioned dinotefuran (“Starcle (trade name)” manufactured by Mitsui Chemicals, Inc.)) in water so that its concentration was 0.5% by weight.
<Test method>
The ventilation rate of an 8-tatami chamber was set once / hour, and a slit box made of a cube having a side of 300 mm was arranged at two diagonal corners of the chamber. Three each of the following three types of test insects were placed in the slit box with slits (slit size: 10 mm × 100 mm) provided at two opposite sides. In addition, a slit box provided with slits having the same dimensions as those described above at one diagonal corner was disposed, and test insects similar to the above were disposed inside and above the slit box. Next, an ultrasonic atomizer as shown in FIG. 3 containing the insecticide was placed in the center of the chamber, and the insecticide was atomized and evaporated under the following test conditions to expose the test insect.

<Test insect>
Test insect A: Black cockroach (female)
Test insect B: susceptible cockroach (female)
Test insect C: resistant German cockroach (female, permethrin resistance ratio 20 times)
<Test conditions>
Transpiration time: 0.8 hours Test insect exposure time: 2 hours Filling amount of insecticide: 500 g
Ventilation rate: once / hour Frequency of ultrasonic atomizer: 1.7 MHz
Fan: Sirocco fan (diameter 50 x 28mm, 20 feathers)
Fan speed: 2673 rpm
Air volume: 1.4L / sec

During the exposure, the test insects were observed for knockdown (upside down), and KT 50 was calculated from the results. Thereafter, the test insects were transferred to a clean cup containing absorbent cotton containing water, and the lethal condition after 24 hours was observed to calculate the lethality rate. These results are shown in Table 1. The amount of transpiration of the insecticide evaporated within the above transpiration time is 23.6 g (the amount of volatilization of the insecticide is 1.18 g (estimated from the amount of transpiration)), and the median particle diameter of the evaporated insecticide is about 7 It was 5 μm. “KT 50 ” refers to the time until half of the test insects are knocked down.
[Reference Example 2]

In the same manner as in Reference Example 1, the insecticidal effect of the above-described ultrasonic transpiration method on the test insect was confirmed. The results are shown in Table 1. The amount of transpiration of the insecticide evaporated during the transpiration time was 30 g (the amount of volatilization of the insecticide was 1.2 g), and the median particle size of the evaporated insecticide was about 6.3 μm.

As shown in Table 1, Reference Example 1 and Reference Example 2, excellent insecticidal effect was to volatilize the water-soluble pesticide by the ultrasonic atomizing device was obtained. That is, in Reference Examples 1 and 2, since the KT 5 0 is smaller mortality is high, it can be seen that both fast-acting and insecticidal activity.

Dinotefuran (“Starkle (trade name)” manufactured by Mitsui Chemicals, Inc. ) described above and a solvent were blended at a blending ratio shown in Table 2 below to prepare an insecticidal solution (sample Nos. 1 to 7).
The propellant dimethyl ether was added to the obtained insecticidal solution, and the whole amount was injected into an aerosol apparatus (Earth Red Non Smoke manufactured by Earth Pharmaceutical Co., Ltd.). The filling amount of the propellant was 70% by volume of the total amount.
On the other hand, a cup with 10 cockroaches in the four corners of a 12-tatami mat room was placed, and the entire floor was sprayed from the aerosol on the center floor, exposed for 1 hour, and the test cockroach was cleaned. The mortality after 24 hours was examined. The results are also shown in Table 2.

表２から、前記殺虫液をエアゾ−ル噴霧用として使用した場合には高い殺虫効果が得られていることがわかる。特に溶剤に水が５０重量％以上含有されていると、より高い効果が得られる。

It can be seen from Table 2 that a high insecticidal effect is obtained when the insecticide is used for aerosol spraying. In particular, when the solvent contains 50% by weight or more of water, a higher effect can be obtained.

[ Reference Test Example 1]
(Effectiveness comparison between ultrasonic atomizer and DDVP evaporator)
<Preparation of sample>
(1) Ultrasonic atomizer 22.5 mL of an insecticidal solution obtained by dissolving 0.8 g of an insecticide (the above-mentioned dinotefuran) in water was accommodated in the ultrasonic atomizer shown in FIG.
(2) DDVP transpiration machine 2.2VP of DDVP (chemical name: dimethyl-2,2-dichlorovinyl phosphate) is supported on four vinyl chloride resin plates, and a DDVP transpiration machine (trade name "Fujitec" With 4 ").

<Test method>
The ventilation rate of an 8-tatami chamber was set once / hour, and a slit box made of a cube having a side of 300 mm was arranged at two diagonal corners of the chamber. Two each of the following two types of test insects were placed inside and above the slit box provided with slits (slit size: 10 mm × 100 mm) at two opposite sides. In addition, a slit box provided with slits having the same dimensions as those described above at one diagonal corner was disposed, and test insects similar to the above were disposed inside and above the slit box. Then, the sample was placed in the center of the chamber, and atomizing evaporate the insecticidal liquid by the following test conditions, test insects were exposed to examine the KT 50 and mortality in the same manner as in Reference Example 1.

<Test insect>
(1) Resistant German cockroach (female adult, resistance ratio 17 times)
(2) Black Roach (Female adult)
<Test results>
The test results are shown in Table 3. The operating conditions of the ultrasonic atomizer other than those described above and in Table 3 are the same as in Reference Example 1.

表３から、超音波霧化機を使用すると、ゴキブリのノックダウンが速いことがわかる。また、超音波霧化機での致死率はＤＤＶＰ蒸散機のそれとほぼ同等であるが、運転時間および暴露時間がＤＤＶＰ蒸散機よりも非常に少ないので、効率よく迅速に殺虫効果を発揮していることがわかる。

It can be seen from Table 3 that cockroach knockdown is fast when using an ultrasonic atomizer. In addition, the lethality of the ultrasonic atomizer is almost the same as that of the DDVP evaporator, but the operation time and exposure time are much shorter than those of the DDVP evaporator, so that the insecticidal effect is exhibited quickly and efficiently. I understand that.

[Test Example 1 ]
(Effectiveness comparison between ultrasonic atomizer and all-injection aerosol)
<Preparation of sample>
(1) The ultrasonic atomizer shown in FIG. 3 was used, and 22.5 g of an insecticidal solution prepared according to the formulation shown in Table 4 was accommodated therein.
(2) An earth spray non-smoke manufactured by Earth Pharmaceutical Co., Ltd. was used as the total amount spray aerosol, and the aerosol spray insecticide prepared by the formulation shown in Table 4 was accommodated therein.

<Test method>
As test insects, the same resistant German cockroach (female adult, resistance ratio 17 times ) and black cockroach (female adult) as in Reference Test Example 1 were used, respectively, and after exposure at the exposure time shown in Table 4, the active ingredient The relationship between the amount of dinotefuran adhering to mortality was investigated. The results for German cockroaches are shown in FIG. 11, and the results for black cockroaches are shown in FIG. The amount of dinotefuran attached was measured by installing a stainless steel petri dish on the floor, spraying and collecting the petri dish and washing it, and quantitatively analyzing the washing liquid by liquid chromatography (LC). The lethality was obtained in the same manner as in Reference Example 1.
From FIG. 11 and FIG. 12, it can be seen that both the ultrasonic atomizer and the all-injection aerosol have high efficacy.

[Test Example 2 ]
(Examination of insecticide ingredients)
<Preparation of sample>
The above dinotefuran and d, d-T-cyphenothrin were mixed with the other components shown in Table 5 in the proportions shown in the same table, and the whole amount was filled in a spray aerosol container to obtain each sample.

<Test method>
The ventilation rate of an 8-tatami chamber was set once / hour, and a slit box made of a cube having a side of 300 mm was placed on the floor at the two diagonal corners of the chamber. The slit box was prepared by providing slits (slit size: 10 mm × 100 mm) at two opposite sides.
In each of the slit box, 10 test insects of the same two types as in Reference Test Example 1 were placed. In addition, on the floor of two other diagonal corners, a triangular prism flushing-out shelter (for German cockroaches: triangle base 30 mm x triangle height 30 mm x pillar height 150 mm, for black cockroach: triangle base 50 mm x triangle height 50 mm X Column height 150 mm). Thereafter, the sample was placed in the center of the floor of the chamber and exposed for 1 hour.

<Test results>
The test results showing the flushing out effect are shown in FIG. 13 and FIG. FIG. 13 shows the flushing out (FO) rate and lethality for German cockroaches, and FIG. 14 shows the flushing out (FO) rate and lethality for black cockroaches, respectively. Here, the flushing-out effect refers to the ease of jumping out from the cockroach gap, and is determined from the FT value (flushing-out time) in the flushing-out test. The lethality was determined in the same manner as in Reference Example 1.

Moreover, the test result which shows the lethal effect on semi-closed conditions is shown in FIG. 15 and FIG. FIG. 15 shows the mortality rate for German cockroaches, and FIG. 16 shows the mortality rate for black cockroaches. Here, the quasi-closed condition refers to a test using a slit box.
From these test results, it can be seen that the combined use of dinotefuran and d, dT-cyphenothrin enhances the lethal effect due to the flushing-out effect.

[Test Example 3 ]
(Efficacy evaluation of insecticide 1)
<Preparation of sample>
A predetermined amount of the insecticide component and efficacy enhancer shown below were added to 15% by volume of ethanol and the balance was added to a solvent of deionized water to adjust the total amount to 30 mL to obtain a sample. This sample was accommodated in the ultrasonic atomizer shown in FIG.

<Test method>
Set the ventilation rate of an 8 tatami chamber once / hour, and place plastic cups with 40 test insects shown below on the floor at the two diagonal corners of the chamber under the open condition without the lid. installed. Thereafter, the sample is placed in the center of the floor of the chamber, and the entire amount of the chemical is volatilized in 10 minutes (frequency: 1.7 MHz, air volume: 4 L / second, atomization rate: 3 mL / minute), and then supplied every 10 minutes. We observed the knockdown of the worm. After exposure for 2 hours, the test insects were transferred to a clean plastic cup containing absorbent cotton and food containing water, and the lethal dose after 24 hours was observed.
<Test insect>
(1) Black cockroach (female adult)
(2) German cockroach (female adult, permethrin resistance ratio 17 times)
<Test results>
The test results are shown in Table 7. In Table 7, KT 50 is the same as above, and KT 90 refers to the time until 90% of the test insects are knocked down.

表７から、ジノテフランは単独でもゴキブリに対して高い殺虫効力を有するが、少量のチアメトキサム、アセタミプリドまたはプロポクスルを添加すると、殺虫効力がより一層向上することがわかる。

From Table 7, it can be seen that dinotefuran alone has a high insecticidal effect against cockroaches, but the addition of a small amount of thiamethoxam, acetamiprid or propoxur further improves the insecticidal efficacy.

[Test Example 4 ]
(Efficacy evaluation of insecticide 2)
A sample was prepared in the same manner as in Test Example 3 except that 0.9 g of nitenpyram was added as a pesticide base, and the efficacy against German cockroaches was tested. The results are shown in Table 8.

表８から、フラニル系殺虫剤であるニテンピラムもゴキブリに対して高い殺虫効力を有していることがわかる。

From Table 8, it can be seen that Nitenpyram, a furanyl insecticide, also has a high insecticidal effect on cockroaches.

It is sectional drawing which shows the ultrasonic atomizer mentioned as reference . It is sectional drawing which shows another ultrasonic atomizer mentioned as reference . (A) And (b) is sectional drawing and a top view which show another ultrasonic atomizer mentioned as reference . It is sectional drawing which shows another ultrasonic atomizer mentioned as reference . It is a partial cross section figure which shows the modification of the ultrasonic atomizer shown in FIG. It is a fragmentary sectional view of the aerosol spraying device concerning one embodiment of the present invention. It is a top view of the aerosol spraying apparatus shown in FIG. It is a disassembled side view of a nozzle member. FIG. 9 is an exploded plan view of the nozzle member shown in FIG. 8. It is sectional drawing of the aerosol spraying apparatus concerning other embodiment of this invention. It is a graph which shows the relationship between the adhesion amount of dinotefuran (water-soluble insecticide) and the lethality rate of German cockroaches. It is a graph which shows the relationship between the adhesion amount of dinotefuran (water-soluble insecticide) and the lethality rate of black cockroaches. It is a graph which shows the flushing out rate and lethality rate about a German cockroach with respect to the mixture ratio of dinotefuran (water-soluble insecticide) and d, d-T-cyphenothrin. It is a graph which shows the flushing-out rate and mortality about black cockroach with respect to the mixture ratio of dinotefuran (water-soluble insecticide) and d, d-T-cyphenothrin. It is a graph which shows the lethality rate of German cockroach with respect to the mixture ratio of dinotefuran (water-soluble insecticide) and d, d-T-cyphenothrin under quasi-closed conditions. It is a graph which shows the lethality of black cockroaches with respect to the compounding ratio of dinotefuran (water-soluble insecticide) and d, dT-cyphenothrin under quasi-closed conditions.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 2 Insecticide 3 Liquid absorption core 4 Core support body 5 Ultrasonic vibrator 6 Joining piece 7 Ultrasonic oscillator 8 Battery 9 Support stand
21 Aerosol container
22 Tightening part
23 stem
31 Spraying means
32 Button part
35 Mounting hole
36 Pressing part
40 Nozzle member

Claims (21)

  A method for transpiration of a water-soluble insecticide, characterized in that an insecticide containing a water-soluble insecticide as an active ingredient is evaporated by an ultrasonic atomizer.   A transpiration method using an ultrasonic atomizer, wherein the particle size of the pesticidal liquid to be transpiration is 3 to 8 μm.   A method for transpiration of an insecticide, comprising: vaporizing an insecticide base or an additive base obtained by adding an additive thereto with an ultrasonic atomizer.   A method for spraying a water-soluble insecticide, which comprises spraying an insecticide containing a water-soluble insecticide as an active ingredient with an aerosol spray device.   A spraying method using an aerosol spraying device, wherein the particle size of the sprayed insecticide is 3 to 8 μm.   An apparatus for use in the transpiration method according to claim 1 or 2, comprising a container containing an insecticide and an ultrasonic vibrator for evaporating the insecticide in the container. Ultrasonic atomization device.   An apparatus for use in the transpiration method according to claim 3, wherein the container contains an insecticide base or an additive base and ultrasonic vibrations for transpiration of the base or additive base in the container. An ultrasonic atomizer characterized by comprising a child.   The ultrasonic atomizer of Claim 6 or 7 provided with the fan for diffusing the pesticidal component which transpired.   A liquid for vibration transmission is interposed between the container and the ultrasonic vibrator, and the insecticide in the container is vibrated through the liquid to evaporate the active ingredient in the insecticide. The ultrasonic atomizer in any one of 6-8.   3. An apparatus for use in the transpiration method according to claim 1 or 2, wherein a container containing an insecticide and a liquid absorbing part with an upper part protruding from an upper opening of the container and a lower part immersed in the insecticidal liquid in the container. An ultrasonic atomizing apparatus comprising: a core and an ultrasonic transducer that is close to the upper end of the liquid-absorbing core without contacting or directly contacting the core.   An apparatus for use in the spraying method according to claim 4 or 5, comprising: an aerosol container containing an insecticide; and a spray means attached to an upper opening of the aerosol container for spraying the insecticide. An aerosol spray device comprising:   An insecticidal solution for ultrasonic transpiration or spraying, comprising a water-soluble insecticide as an active ingredient and the insecticide dissolved in water, an organic solvent or a mixture thereof.   The insecticide according to claim 12, wherein the water-soluble insecticide is 1-methyl-2-nitro-3- (tetrahydro-3-furylmethyl) guanidine. The insecticide according to claim 12 or 13, which contains at least one of the following components (1) to (4) as an efficacy enhancer.
(1) 3- (2-Chloro-1,3-thiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-one (2) (E) -N ¹ -[(6- Chloro-3-pyridyl) methyl] -N ² -cyano-N ¹ -methylacetamidine (3) 2-isopropoxyphenyl-N-methylcarbamate (4) d, d-T-cyphenothrin   An insecticide composition for spraying, which comprises a water-soluble insecticide as an active ingredient, an insecticide obtained by dissolving the insecticide in water, an organic solvent or a mixture thereof, and a propellant. An insecticide composition comprising a furanyl-based water-soluble insecticide and a solvent, wherein the solvent is at least one selected from water, a compound represented by the following general formula (1) and a lower alcohol.

(In the formula, R is an alkyl group having 1 to 6 carbon atoms, and m and n are the same or different integers of 0 to 6. However, m and n are not 0 at the same time.)   The insecticidal solution composition according to claim 16, comprising a furanyl-based water-soluble insecticide and a solvent, wherein the solvent contains water and diethylene glycol monobutyl ether, and the blending ratio of diethylene glycol monobutyl ether in the solvent is 40 to 20% by weight.   The insecticidal solution composition according to claim 16 or 17, which contains at least one of the components (1) to (4) according to claim 14 as an efficacy enhancer.   A pest control method, comprising transpiring or spraying the insecticidal solution composition according to any one of claims 16 to 18 using an ultrasonic atomizer or an aerosol.   A resistant cockroach control composition comprising 1-methyl-2-nitro-3- (tetrahydro-3-furylmethyl) guanidine) as an active ingredient.   The resistant cockroach control composition according to claim 20, comprising at least one of components (1) to (4) according to claim 14 as an efficacy enhancer.

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