JP2004215662A - Spraying method for liquid drug and aerosol agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spraying method for a liquid drug and an aerosol agent inhibiting stinking emission by a noxious stink-bug in controlling the stink-bugs emitting the stink. <P>SOLUTION: The spraying method sprays to deliver the liquid drug to the stink-bug so that the stink-bug is knockdowned or died within three seconds after start of spraying, in spraying to the stink-bugs with stinking emission. The aerosol agent is adjusted to deliver the effective amount of the liquid drug to knockdown or kill the stink-bug within three seconds after start of spraying. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a method of spraying a chemical solution and an aerosol agent for eliminating odors caused by the pests at the time of exterminating pests such as stink bugs.

  Stink bugs are generally well known as pests that emit an unpleasant odor. Since stink bugs attack crops, they have long been targeted for control as agricultural pests. In recent years, the habitat of stink bugs and human dwellings have come close to each other, and the damage such as the generation of physiological disgust and the generation of offensive odors has increased, and they have also attracted attention as unpleasant pests. And since the damage tends to increase, means for controlling stink bugs are being studied. For example, a method of using a liquid or aerosol containing silafluofen and a pyrethroid insecticide to prevent stink bugs from entering a house has been studied (for example, see Patent Document 1). Further, a method has been proposed in which a stink bug is expelled from a house by using a cockroach smoker containing permethrin, or a permethrin emulsion is applied to an outer wall to prevent invasion into a house (for example, see Non-Patent Document 1). ).

JP-A-8-59413 (pages 1-5) Abe Ryousaku, "Hokkaido Stink Bug Countermeasures", Life and Environment, Japan Environmental Health Center, 1989, VOL. 34, no. 5, p. 27-32

  Since these means are intended to prevent stink bugs from entering the house, they cannot prevent the generation of stench due to the stink bug's stimulus reaction and are not sufficient to reduce the damage. Conventionally, there has been no study for the purpose of preventing the generation of offensive odor due to stink bugs, and no solution has been known.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for spraying a chemical solution and an aerosol for eliminating pests emitting stinks such as stink bugs so as to eliminate the generation of smells. It is assumed that.

The present inventors have conducted intensive studies in order to satisfy the above-mentioned problems, and as a result, when spraying a chemical solution toward a pest that emits an odor (hereinafter, also referred to as a pest), knockdown or knock-down until the pest emits a bad smell It is effective to lethal, and after various examinations of spraying conditions therefor, spraying is performed within 3 seconds from the start of injection, preferably within 2 seconds, so that the chemical solution reaches the pest so as to be knocked down or lethal. As a result, it has been found that pests can be controlled without generation of odor, and the present invention has been achieved. That is, the present invention is achieved by the following configurations.
(1) When spraying a chemical solution toward a pest that emits an odor, the chemical solution is sprayed so as to reach the pest such that the pest is knocked down or killed within 3 seconds from the start of spraying. Spray method of chemicals.
(2) The method for spraying a chemical according to the above (1), wherein the chemical is sprayed so that the average particle size of the chemical is 90 μm or more.
(3) The method according to (1) or (2), wherein the spraying is performed within a distance of 100 cm from the pest.
(4) The method for spraying a chemical solution according to any one of the above (1) to (3), wherein the chemical solution containing a coolant is sprayed.
(5) The method for spraying a drug according to any one of the above (1) to (4), wherein a drug solution containing benzyl alcohol is sprayed.
(6) An aerosol for spraying a chemical solution toward a pest that emits an odor, such that an effective amount of the chemical solution at which the pest is knocked down or killed reaches the pest within 3 seconds from the start of spraying. An aerosol agent characterized by being adjusted.

  According to the method for spraying a chemical solution and the aerosol agent of the present invention, pests emitting stink bugs such as stink bugs can be knocked down or killed instantly (within 3 seconds) even at a certain distance. Can be eliminated. Therefore, it is very useful for preventing and reducing damage caused by odor, which has been a conventional problem.

An embodiment of the present invention will be described below. In the method for spraying a drug solution of the present invention, it is convenient to spray the drug solution as an aerosol. It may be a formulation that can be applied to a pump agent or an electric nebulizer. Here, an aerosol agent will be specifically described with reference to an example. 21 ml of 2,3-dihydrodecafluoropentane and 9 ml of isopentane (or isopropanol) are used as a chemical, and 230 ml of dimethyl ether (or liquefied petroleum gas) is used as a propellant. To prepare an aerosol. As an aerosol container, an injection button 1 (a nozzle member 20 having eight nozzles 10 having a nozzle diameter of 1 mm and a total area of the nozzle holes being about 6.3 mm ² ) and an aerosol valve (0. One having a stem diameter of 6 mm, having a housing diameter of 2.2 mm, and having no vapor tap) can be exemplified.

  Then, the prepared aerosol is sprayed toward the pest from a distance of about 20 to 100 cm for about 1 to 3 seconds (corresponding to an injection amount of 1 to 18 ml), so that the pest is knocked within 3 seconds without generation of a bad smell. Can be down or lethal. The knocked-down pests can be destroyed by discarding as necessary.

  The present invention is not limited to the above, and the following cooling agents may be used as long as the effects of the present invention are exhibited. Lower alcohols such as methanol, ethanol, and isopropanol, propane, butane, pentane, isopentane, and cyclopentane , And one or more of 2,3-dihydrodecafluoropentane. The cooling agent may be used as a chemical solution (that is, the content as a chemical solution is 100% by weight), or may be used in combination with a drug, in which case the content is 10 to 75% by weight of the total amount of the chemical solution. preferable. Further, knockdown or lethal effect can be improved by using a cold storage agent such as a superabsorbent polymer or a gelling agent as needed.

  In addition, natural pyrethrin, pralethrin, imiprothrin, phthalthrin, allesulin, transfluthrin, resmethrin, phenothrin, cyphenothrin, d, d-T99-cyphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenvalerate, fenvalerate, fenvalerate, Propasulin, silafluofen, (S) -2-methyl-4-oxo-3- (2-propynyl) -cyclopent-2-enyl (1R) -trans-3- (2,2-dichlorovinyl) -2,2 -Dimethylcyclopropanecarboxylate, 2,3,5,6-tetrafluoro-4-methoxymethylbenzyl-3- (1-propenyl) -2,2-dimethylcyclopropanecarboxylate, methfluthrin, S-186 (Manufactured by Sumitomo Chemical Co., Ltd.), organic phosphorus compounds such as dichlorvos, carbamate compounds such as propoxur, oxadiazole compounds such as methoxadiazon, sulfonamide compounds such as amideflumet, and nicotinoids such as dinotefuran. Compounds, insecticides such as pyrazole compounds such as chlorfenapyr and fipronil, essential oils such as peppermint oil, turpentine oil, benzyl alcohol, alkylphenols such as isopropylmethylphenol and thymol, surfactants, S-2847 (manufactured by Sumitomo Chemical Co., Ltd.) ), Etc., depending on the pest, one or more kinds may be contained in the chemical solution. It is effective to use these components having an insecticidal action because they can be killed in addition to knockdown. Further, these components having an insecticidal action may be used in combination with the above-mentioned cooling agent for the purpose of killing the knocked-down pests. These components having an insecticidal action may be contained in the chemical solution at 0.01 to 60% by weight, preferably 1 to 20% by weight. Above all, it is preferable that benzyl alcohol is contained in an amount of 0.3 g or more, preferably 0.5 g or more, per 300 ml of the aerosol. Further, it is more preferable to use 5 to 60 ml of the cooling agent in combination.

  When preparing a formulation for spraying, a liquid carrier can be used, and water, aromatic hydrocarbons such as alkylbenzene, kerosene, saturated hydrocarbons such as paraffinic hydrocarbons and naphthenic hydrocarbons, and non-equipment such as octene can be used. Saturated hydrocarbons, alcohols such as isopropyl alcohol, ethyl alcohol, oleyl alcohol, lauryl alcohol, esters such as isopropyl myristate, glycols such as polyethylene glycol and polypropylene glycol, ethers such as alkyl phenyl ether, and chlorine such as dichloromethane. One or more of a solvent, a fluorine solvent, a silicone solvent and the like can be used.

  Examples of the propellant include compressed gas such as nitrogen gas, compressed air and carbon dioxide gas; hydrofluorocarbon such as HFC-152a and HFC-134a; liquefied gas such as dimethyl ether; liquefied petroleum gas such as propane, butane and isobutane; One or more kinds of pentanes such as normal pentane, isopentane and cyclopentane can be used.

  Further, if necessary, surfactants such as POE alkyl ether and POE fatty acid ester, solubilizers such as lactate ester, alkylpyrrolidone, polyvinylpyrrolidone, propylene carbonate, piperonyl butoxide, N-octylbicycloheptene dicarboximide (MGK264), potency enhancers such as 1,1'-oxybis [2,3,3,3-tetrachloropropane] (S421), spreading agents such as lanolin, deodorants such as polyphenols; lavender, floral green, etc. And the like.

The aerosol container is a spray button as shown in FIG. 1 instead of the above specification, and has a plurality of (2 to 10) orifices having an orifice diameter of 0.7 to 1.5 mm. A spray button provided with a nozzle member having a diameter of 0.7 to 18 mm ² may be used. Further, in the aerosol valve, the opening area is 0.2 to 3.6 mm ² (for example, one with a diameter of 0.5 to 0.6 mm, two with a diameter of 0.45 to 0.6 mm, or 0 One having a diameter of 0.6 mm can be exemplified), and one having a housing diameter of 1 to 2.2 mm and a vapor tap diameter of 1 mm or less is preferable. Note that the vapor tap need not necessarily be provided.

  Further, as shown in FIGS. 2 and 3, a spray button 1 with a switching nozzle having a long nozzle 30 and a nozzle 50 can be used. As shown in FIG. 2, the injection button 1 erected the long nozzle 30 substantially perpendicularly to the container body 40 to inject the aerosol content from the injection port member 20 at the tip, or as shown in FIG. The long nozzle 30 is tilted toward the container body 40 to eject the aerosol contents from the nozzle 50. The nozzle member 20 at the tip of the long nozzle 30 can have the same configuration as described above, and the nozzle 50 can be a mechanical breakup nozzle or a straight nozzle. Reference numeral 31 in the figure denotes a holding portion for facilitating the operation of tilting or standing the long nozzle 30. When the elongate nozzle 30 is used upright, it is suitable because it can be sprayed away from the harmful insects.

  The pests that emit an odor due to the spray blow off and may not be able to come into sufficient contact with the chemical in some cases. However, as schematically shown in FIG. 4, the inside diameter (middle) of the joint portion A of the long nozzle 30 with the container body 40 is determined. By making the orifice diameter smaller than the inner diameter (middle orifice diameter) of the connection portion B with the injection port member 20, the injection force is reduced as compared with the case where both inner diameters are the same. Blow-off due to injection can be suppressed. In addition, there is an advantage that the cooling effect works farther with the same injection amount.

  The aerosol container is preferably filled so that the propellant is 95 to 70% by volume with respect to 5 to 30% by volume of the chemical solution.

  When spraying on the pest, it is effective to spray the solution from within a distance of 100 cm, preferably 50 cm, for about 1 to 3 seconds (corresponding to an injection amount of 1 to 18 ml) so that the chemical solution comes into direct contact with the pest. In this case, the distance is a linear distance between the nozzle of the aerosol agent and the pest.

  When spraying a chemical solution using an aerosol agent to control pests, it is preferable to adjust the average particle size of the sprayed chemical solution to 90 μm or more, preferably 120 to 250 μm, based on the above specifications. The average particle diameter means D50 (cumulative 50%) analyzed by a particle size distribution analyzer and analyzed by an automatic arithmetic processor. Specifically, from a position where the distance between the laser beam emitted from the laser light emitting unit of the particle size distribution measuring device to the light receiving unit and the injection port of the specimen is about 50 cm, the ejected material passes the laser beam vertically. The sample is ejected as follows. It is determined by performing measurement during injection and analyzing the particle size distribution of the injection by an automatic processing unit. In addition, even when spraying a formulation applicable to a pump agent or an electric nebulizer, any one that satisfies the above conditions can be used as long as the effects of the invention are exhibited.

  In addition, by containing a foaming resin or the like in the chemical solution, the insect pest may be wrapped when sprayed. In this way, the generation of offensive odor can be further reduced. In addition, a viscous component may be included in the chemical solution to block the malodor releasing port (secretory gland or the like) of the pest.

  The present invention relates to sting bugs such as turtles, such as turtle bugs, mosquito bugs, blue stink bugs, mark bugs, scot stink bugs, chavanea stink bugs, turtle stink bugs, sting bug stink bugs, sting bug stink bugs, and sting bugs such as sting bugs such as sting bugs It is intended for pests that emit odors such as millipedes, beetles and carabid beetles.

  Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited thereto.

・ Biological test 1
The compositions shown in Table 1 were pressure-filled into aerosol containers (A) having the following specifications to prepare aerosol agents (Examples 1 to 4). Then, release the one stink bug on the ground one by one, and use the aerosol of Examples 1 to 4 for about 2 cm from the distance (linear distance between the nozzle and the stink bug) for 2 seconds (equivalent to the injection amount of 6 ml). ), And the knockdown time, generation of odor, and lethality (%) after 24 hours were examined. The test was performed three times, and the knockdown time was the average value. Table 2 shows the results of the test. As a comparative example, a commercially available aerosol for stink bug (containing silafluofen and phenothrin as active ingredients) was sprayed under the same conditions and used. The particle diameters of the aerosols of Examples 1 to 4 and Comparative Example were measured by the above particle size distribution measuring device. Table 2 shows the measured particle diameters.
Aerosol container (A)
Injection button: a configuration shown in FIG. 1 having eight orifices having an orifice diameter of 1 mm, and having an orifice member having a total area of approximately 6.3 mm ² .
An aerosol valve having one stem diameter of 0.6 mm, a housing diameter of 2.2 mm, and no vapor tap.

  In the control method using the aerosol of Examples 1 to 4 of the present invention, the stink bug was knocked down within 2 seconds and could be controlled without generation of odor. The comparative example had a lethal effect on the stink bug, but it took about 60 seconds to knock down, during which time there was a strong smell.

・ Biological test 2
The above aerosol container (A) was pressure-filled with a composition comprising 15 ml of an ethanol solution containing 1 g of isopropylmethylphenol and 0.5 g of isopropyl myristate, 60 ml of isopentane, 123 ml of liquefied petroleum gas, and 102 ml of dimethyl ether. The effect was confirmed by the same method as in the biological test (1). As a result, the stink bug was knocked down within 2 seconds and no odor was generated. The lethality (%) after 24 hours was 100. The particle size of the aerosol was 194 μm.

・ Biological test 3
A composition comprising 15 ml of ethanol, 60 ml of isopentane, 123 ml of liquefied petroleum gas, and 102 ml of dimethyl ether was pressure-filled into the aerosol container (A). The male and female of the stink bug are released on the ground one by one, and they can be active freely, and the aerosol is sprayed there from a predetermined distance (the linear distance between the nozzle and the stink bug) for 2 seconds (equivalent to an injection amount of 6 ml). The knockdown time, generation of odor, and lethality (%) after 24 hours were examined. The test was performed three times, and the knockdown time was the average value. Table 3 shows the results of the test. The particle size of the aerosol was 181 μm.

  In the control method using the aerosol agent of the present invention, if the distance to the stink bug is within 100 cm, knockdown is performed within 2 to 3 seconds so that there is no odor, or even if there is, there is a substantial problem. It was able to get rid of it without getting it.

・ Biological test 4
A composition consisting of 15 ml of an ethanol solution containing 2 g of benzyl alcohol, 60 ml of isopentane, 121 ml of liquefied petroleum gas and 104 ml of dimethyl ether was pressure-filled into an aerosol container (B) shown below.
Aerosol container (B)
Injection button; shown in FIG. 2, the long nozzle has a straight pipe with an inner diameter of 3 mm, and the nozzle member has eight nozzles with a nozzle diameter of 1 mm, and the total area of the nozzle is about 6.3 mm ² .
An aerosol valve having three stem diameters of 1.2 mm, a housing diameter of 2.2 mm and no vapor tap.

  Then, a single bug was released on the ground to allow free activity, and an aerosol was sprayed there from a position at a linear distance of 80 cm between the nozzle and the bug (corresponding to an injection amount of 6 ml) for 2 seconds. The test was performed 10 times, and in each case, the bug was knocked down immediately after the injection, and the lethality (%) after 24 hours was 100.

・ Biological test 5
A composition comprising 15 ml of an ethanol solution containing 2 g of benzyl alcohol, 60 ml of isopentane, 121 ml of liquefied petroleum gas, and 104 ml of dimethyl ether was pressure-filled into an aerosol container (C) shown below.
Aerosol container (C)
Injection button: a configuration shown in FIG. 2, the long nozzle is a straight pipe having an inner diameter of 3 mm, and a mechanical breakup injection port having a diameter of 0.55 mm.
An aerosol valve having two stem diameters of 0.6 mm, a housing diameter of 2.2 mm and no vapor tap.

  Then, one condition of a stink bug was released on the ground to allow free activity, and an aerosol was sprayed there from a position having a linear distance of 70 cm between the nozzle and the stink bug (corresponding to an injection amount of 6 ml). The test was performed twice, in each case, the stink bug was knocked down immediately after injection and the lethality (%) after 24 hours was 100.

・ Biological test 6
A composition comprising 30 ml of an ethanol solution containing 2 g of benzyl alcohol, 60 ml of isopentane, 113 ml of liquefied petroleum gas, and 97 ml of dimethyl ether was pressure-filled into the aerosol container (C).

  Then, one condition of a stink bug was released on the ground to allow free activity, and an aerosol was sprayed there from a position having a linear distance of 70 cm between the nozzle and the stink bug (corresponding to an injection amount of 6 ml). The test was performed twice, in each case, the stink bug was knocked down immediately after injection and the lethality (%) after 24 hours was 100.

・ Biological test 7
As shown in Table 4, compositions having different contents of benzyl alcohol were prepared, and pressure was charged into an aerosol container (D) in which a 0.8 mm straight nozzle appeared when the long nozzle was turned down as shown in FIG. did.

  Then, release the five stink bugs on the ground so that they can be active freely. Spray an aerosol agent onto the ground from the position with a straight line distance of 20 cm between the orifice and the stink bug for 2 seconds (equivalent to a spray volume of 6 ml), and kill 24 hours later. (%) Was determined. The results are also shown in Table 4. When 0.3 g of benzyl alcohol is contained per 300 ml, the lethality (%) can be set to 80, and when the content is 0.5 g or more, the lethality (%) is set to 100. can do.

・ Biological test 8
The aerosol container (B) was prepared by changing the inner diameter (middle orifice diameter) of the joint part of the long nozzle and the inner diameter (middle orifice diameter) of the connection part with the nozzle member as shown in Table 5, respectively. The composition used in 4 was pressure-filled.

  Then, a thermocouple thermometer was placed at a position of 50 cm and 70 cm in a straight line distance from the injection port, and an aerosol was sprayed to measure the temperature at both positions. The results are also shown in Table 5, and a higher cooling effect can be obtained with the same injection amount by narrowing the diameter of the middle orifice of the joint part from the diameter of the middle orifice of the connection part of the injection port member.

The formulation examples of the aerosol of the present invention are shown below.
-Formulation Example 1
A composition comprising 15 ml of an isopropyl alcohol solution containing 0.033 g of imiprotrin and 0.033 g of phenothrin, 60 ml of isopentane, 123 ml of liquefied petroleum gas, and 102 ml of dimethyl ether was pressure-filled into the above aerosol containers (A) to (F), and The aerosol of the present invention.
-Formulation Example 2
A composition comprising 15 ml of an isopropyl alcohol solution containing 0.033 g of imiprothrin and 0.02 g of cyphenothrin, 60 ml of isopentane, 123 ml of liquefied petroleum gas, and 102 ml of dimethyl ether was pressure-filled into the above aerosol containers (A) to (F), The aerosol of the present invention.
・ Formulation Example 3
A composition consisting of 15 ml of an ethanol solution containing 2 g of benzyl alcohol, 60 ml of isopentane, 121 ml of liquefied petroleum gas, and 104 ml of dimethyl ether is pressure-filled into the above aerosol containers (A) to (F) to obtain the aerosol of the present invention.

It is a perspective view showing an example of a jet button of an aerosol container used for an aerosol agent of the present invention. It is a perspective view showing other examples of an aerosol container, and is a figure showing the state where a long nozzle was raised. FIG. 3 is a perspective view illustrating a state in which a long nozzle of the aerosol container illustrated in FIG. 2 is tilted. FIG. 3 is a schematic diagram for explaining the influence of the diameter of a long nozzle in the aerosol container shown in FIG. 2.

Explanation of reference numerals

DESCRIPTION OF REFERENCE NUMERALS 1 injection button 10 injection port 20 injection port member 30 long nozzle 40 container body

Claims (6)

  When spraying a chemical solution toward a pest that emits an odor, spraying the chemical solution so as to reach the pest such that the pest is knocked down or killed within 3 seconds from the start of spraying. Method.   The method according to claim 1, wherein the spraying is performed so that the average particle diameter of the sprayed chemical solution is 90 µm or more.   3. The method according to claim 1, wherein the spraying is performed within a distance of 100 cm from the pest.   The method for spraying a chemical according to any one of claims 1 to 3, wherein the chemical containing a coolant is sprayed.   The method for spraying a drug according to any one of claims 1 to 4, wherein a drug solution containing benzyl alcohol is sprayed. An aerosol for spraying a chemical solution toward a pest that emits an odor, wherein the aerosol is adjusted so that an effective amount of the chemical solution that knocks down or kills the pest within 3 seconds from the start of spraying. An aerosol agent, characterized in that:

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