JP2011121894A - Method of preventing insect pest from coming flying - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of preventing insect pests from coming flying, wherein insects pests are prevented from coming flying to this target surface to be treated by spraying an aerosol in the state of not forming a spray film on a target surface to be treated such as a window glass and a screen door and cloudiness and staining of the treated surface does not occur due to the aerosol content fluid, particularly on a glass surface as the target treated surface. <P>SOLUTION: The method of preventing insect pests from coming flying includes: using an aerosol stock containing a pyrethroid insecticidal ingredient and a 1-3C lower alcohol and a liquefied gas at a compounding ratio of the aerosol stock to the liquefied gas of 10/90 to 50/50; and wide-angle-spraying spray particles having an average particle diameter of 10-50 μm at a spray amount of 1-10 mL/m<SP>2</SP>onto a target surface to be treated to prevent insect pests from coming flying to this target surface thus treated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a method for preventing pests from flying, and more particularly, to a method for preventing pests from flying by spraying on a target processing surface such as a window glass or a screen door.

As an aerosol for the purpose of pest control, in view of its usage, it sprays on target pests such as pests flying in indoor spaces, pests that crawl walls and floors, or pests that inhabit outdoor plants. There are a direct hit type and an ambush type in which a chemical is sprayed on the target treatment surface in advance to kill or repel pests. In the latter case, there are many uses for cockroaches, but some insect pest control agents that use window glass, screens, etc. as target treatment surfaces have been proposed.

For example, Patent Document 1 (Patent No. 4119647) discloses a pest control component, a film-forming component that is a higher fatty acid ester, an anti-infestation method for invading pests for coating a glass surface that is filled with an n-paraffin solvent and a propellant. Discloses an aerosol agent, and when sprayed on a glass surface such as a glass window or a show window, it can form a highly weather-resistant film without impairing the transparency of the glass surface and The intrusion prevention effect can be maintained.
In Patent Document 1, it is essential to use an insecticidal component having a low vapor pressure and low volatility because it requires residual effect, and it is essential to form a film on the glass surface. An unsightly striped pattern was produced on the surface, which was not always satisfactory in terms of usability.

Patent Document 2 (Japanese Patent Application Laid-Open No. 11-31502) includes a pest control component and a spray for screen doors having a spraying power of 5 g · f / 20 cm or less, preferably a pest control component as a nonionic surfactant. And / or a screen spray solubilized or dissolved in a solvent with a fatty acid ester.
This spray for screen doors, whether pump type or aerosol type, allows the contents to adhere to the screen door efficiently without passing through the screen mesh too much. As a result of emphasizing the amount of adhesion to the screen door, a nonionic surfactant and / or a fatty acid ester is essential. For this reason, when used by spraying on a glass surface such as a glass window, the transparency of the glass surface is impaired, and at least it is unsuitable for such use scenes.

Japanese Patent No. 4119647 JP-A-11-31502

The present invention prevents pests from flying to the target treatment surface by spraying aerosol in a state where a spray coating is not formed on the target treatment surface such as a window glass or a screen door. It is an object of the present invention to provide a method for preventing pests from flying, which does not cause fogging or contamination of the treatment surface with the aerosol content liquid, based on the fact that when the glass surface is the target treatment surface, the spray coating is not formed. To do.

The present invention has been found that the following constitution has an excellent effect for achieving the above-mentioned object.
(1) It consists of an aerosol stock solution containing a pyrethroid insecticidal component and a lower alcohol having 1 to 3 carbon atoms and a liquefied gas, and the mixing ratio of the aerosol stock solution and the liquefied gas is 10/90 to 50/50 volume ratio. Using aerosol, the spray amount of the aerosol stock solution is 1 to 10 mL / m ² , and spray particles having an average particle diameter of 10 to 50 μm are sprayed on the target treatment surface at a wide angle, thereby causing pests to enter the target treatment surface. A method to prevent pests from flying in order to prevent them from flying.
(2) After spraying the aerosol toward a vertical plate surface 20 cm away, the maximum diameter of the wet portion of the plate surface is measured, and when this is used as a spray pattern (SP), the SP is 8 cm or more. The method for preventing pests from flying according to (1), wherein spraying is performed at a wide angle.
(3) The method for preventing pests from flying according to (1) or (2), wherein the spray amount of the aerosol stock solution is 1.5 to 6 mL / m ² .
(4) The aerosol stock solution further contains a higher fatty acid ester composed of a branched saturated alcohol and a fatty acid having 14 to 18 carbon atoms, and prevents pests from flying in any one of (1) to (3) Method.
(5) The method for preventing pests from flying according to any one of (1) to (4), wherein the pyrethroid insecticide is cyfluthrin.
(6) The pest flying prevention method according to any one of (1) to (5), wherein the target treatment surface is a glass surface, and no spray coating is formed on the glass surface.

According to the method for preventing pests flying according to the present invention, it is possible to prevent pests from flying to the target treatment surface by spraying a specific aerosol on a target treatment surface such as a window glass or a screen door, In the case where the glass surface is the target processing surface, it is extremely practical because the sprayed coating is not formed, and the processing surface is not clouded or soiled by the aerosol content liquid.

Examples of pyrethroid insecticides used in the present invention include cyfluthrin, phenothrin, permethrin, ciphenothrin, cypermethrin, tralomethrin, fenpropatoline, etofenprox, allethrin, praretrin, flamethrin, phthalthrin, resmethrin, imiprotolin, emfluthrin, transfluthrin Examples include tritrine, metfurthrin, profluthrin and the like. One kind of these compounds may be used, or two or more kinds of compounds may be used in combination.
Usually, cyfluthrin, phenothrin, permethrin, ciphenothrin, cypermethrin, tralomethrin, fenpropatoline and etofenprox, which are hardly volatile at normal temperature in view of the residual effect, are preferably used, and cyfluthrin is particularly preferred.
The pyrethroid insecticidal component includes optical isomers and geometric isomers based on the asymmetric carbon and double bond, and the use of each of these or any mixture thereof is also included in the present invention. Of course.

The content of the pyrethroid insecticidal component blended in the aerosol stock solution may be appropriately determined in consideration of the purpose of use, use period, etc., but about 0.02 to 10 w / v% is appropriate in the aerosol stock solution. . If it is less than 0.02 w / v%, the desired effect cannot be obtained. On the other hand, if it exceeds 10 w / v%, it is difficult to stabilize the aerosol content.

The aerosol stock solution used in the present invention uses a lower alcohol having 1 to 3 carbon atoms such as ethanol, isopropanol (IPA) or n-propanol (nPA) as a solvent for a pyrethroid insecticide component. Since such lower alcohols are quick-drying and quickly volatilize, there is an advantage that a coating film is not formed on the target processing surface and fogging and dirt do not occur.
As long as the effects of the present invention are not hindered, other solvents such as hydrocarbon solvents such as n-paraffin and isoparaffin, propylene glycol, 1,3-butylene glycol, 1,4-butylene. A C3-C6 glycol such as glycol, dipropylene glycol, diethylene glycol monobutyl ether, glycol ethers, ketone solvents, ester solvents, etc. may be used.

The aerosol stock solution contains insecticidal components other than pyrethroid insecticidal components, for example, silicon compounds such as silafluophene, organophosphorus compounds such as dichlorvos and fenitrothion, carbamate compounds such as propoxur, neonicotine such as dinotefuran, imidacloprid and clothianidin. Noid compounds, other fipronil, indoxacarb, etc. may be added, and pest repellents, acaricides, molds, fungicides for fungi, antibacterial agents and fungicides, or Of course, stabilizers, ultraviolet absorbers, deodorants, antistatic agents, antifoaming agents, fragrances, excipients and the like may be appropriately blended. Pest repellents include diet, 3- (Nn-butyl-N-acetyl) aminopropionic acid ethyl ester [hereinafter referred to as IR3535], 1-methylpropyl 2- (2-hydroxyethyl) -1-piperidine Carboxylate [hereinafter referred to as picaridin], p-menthane-3,8-diol, dimethyl phthalate, eucalyptol, α-pinene, geraniol, citronellal, camphor, linalool, caran-3,4-diol, etc. Examples of acaricides include methyl 5-chloro-2-trifluoromethanesulfonamide benzoate, phenyl salicylate, 3-iodo-2-propynyl butyl carbamate, and the like. 2-mercaptobenzothiazole, 2- (4-thiazolyl) benzui Imidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, triforine, 3-methyl-4-isopropyl phenol, ortho - can be exemplified phenyl phenol and the like.

The aerosol used in the present invention is characterized in that a spray coating is not formed in the case of a target treatment surface, particularly a glass surface, and the use of a surfactant or a solubilizing agent is minimized in the aerosol stock solution, while a pyrethroid insecticide component It is preferable to contain a higher fatty acid ester composed of a branched saturated alcohol and a fatty acid having 14 to 18 carbon atoms as an immobilization aid for the target treatment surface.
Specific examples of such higher fatty acid ester compounds include, but are not limited to, isocetyl stearate, isocetyl isostearate, isostearyl palmitate, and isocetyl myristate. These compounds, which are low in volatility and exhibit a liquid state at room temperature, enclose pyrethroid insecticidal components and are scattered on the target treatment surface. That is, it contributes to the expression of efficacy of the pyrethroid-type insecticidal component and its sustainability without becoming a film on the target treated surface.
The amount of the higher fatty acid ester compound is suitably about 1.0 to 30 times that of the pyrethroid insecticide component, and if it is less than 1.0 times, the immobilization effect is insufficient.

As the propellant, a liquefied gas such as liquefied petroleum gas (LPG) or dimethyl ether (DME) is used. One of them or a mixed gas may be used, but those mainly composed of LPG are easy to use. In order to adjust the injection pressure, a slight amount of compressed gas such as nitrogen gas, carbon dioxide gas, nitrous oxide, or compressed air may be added.

In the present invention, in order to create a state in which a spray coating is not formed on the target processing surface, relatively fine spray particles are sprayed over a wide range. That is, using an aerosol in which the mixing ratio of the aerosol stock solution and the liquefied gas is 10/90 to 50/50 volume ratio, the spray amount of the aerosol stock solution is 1 to 10 mL / m ² , preferably 1.5 to 6 mL / m ^2. In addition, it is essential to spray spray particles having an average particle diameter of 10 to 50 μm at a wide angle.
On the other hand, since the aerosol agent for preventing flying insect pests in Patent Document 1 (Patent No. 4119647) is based on increasing the amount of adhesion to the glass surface and forming a film on the treated surface, The mixing ratio of the propellant gas is 50/50 to 80/20 volume ratio, the ratio of the aerosol stock solution is high, and the average particle size is also large. Therefore, the composition ratio of the aerosol stock solution and the liquefied gas and the size of the spray particle diameter in the present invention are completely opposite to those in Patent Document 1, and the present invention is based on a novel technical idea.

When spraying the aerosol at a wide angle, after spraying the aerosol toward a vertical plate surface 20 cm away, the maximum diameter of the wet part of the plate surface is measured, and when this is used as the spray pattern (SP), this SP is It is good to design so that it may be 8 cm or more.
According to such a spraying method using the above-mentioned aerosol, even when sprayed on a glass surface such as a glass window or a show window, the aerosol content liquid is scattered on the target processing surface and no spray coating is formed. This has the advantage that the transparency of the film is not impaired at all.

The aerosol can be appropriately selected in the shape of a valve, a nozzle, a nozzle, etc. according to its application, target pests, etc., but the above-mentioned SP value can be selected by using a wide-angle nozzle or combining a plurality of nozzles. Is suitably set to 8 cm or more.

The present invention thus obtained aerosols to, 0.2 mg / m ² or more as a pyrethroid insecticidal ingredient to a subject treated surface, preferably by spraying so as to 0.5 to 50 mg / m ^2, the pest Flying to the target treatment surface can be prevented over a long period of one month or more. Especially when the glass surface is the target treatment surface, the spray coating is not formed, and the treatment surface is clouded by the aerosol content liquid. The present invention provides an extremely practical method for preventing pests from flying without causing dirt or dirt.
Specific application scenes include glass surfaces such as glass windows and show windows, screen doors, sashes, walls, and the like, but are particularly useful when the target treatment surface is a glass surface.

Pests effective for the method of preventing pests flying according to the present invention are pests that fly and cause damage or discomfort to humans outdoors, for example, mosquitoes such as mosquitoes, Aedes albopictus, chironomids, house flies, butterflies, flyfish, Various flying pests such as fly, bee, leafhopper and the like can be exemplified, but of course not limited to these pests. In addition, it was recognized that the treated surface to which the present invention is applied not only shows the effect of preventing flying against flying pests, but can also prevent the entry of treated insects such as ants, cormorants, and rotifers.

Next, the method for preventing pests from flying according to the present invention will be described in more detail based on specific examples and test examples, but the present invention is not limited to these.

60 mL of an aerosol stock solution containing 0.5 w / v% cyfluthrin, 2.0 w / v% isocetyl stearate, and the balance ethanol was placed in an aerosol container. A valve part was attached to the container, LPG 240 mL was pressurized and filled through the valve part, and a wide-angle nozzle was loaded to obtain an aerosol used in the present invention.
The average spray particle size of this aerosol was 15 μm, and the SP based on the measurement method was 12 cm.

The aerosol was sprayed onto a window glass having an area of about 10 m ² with 3 mL / m ² (cyfluthrin: about 15 mg / m ² ) as an aerosol stock solution. Since the target treated surface does not form a spray coating, it does not cause unsightly fogging or dirt, and the transparency of the glass surface is not impaired. In addition, flying insect pests such as mosquitoes, chironomids, butterflies, and flyfish can be prevented for a long period of more than one month, and insects such as ants, rubber bugs, and moths can invade. There wasn't.

Various aerosols shown in Table 1 were prepared according to Example 1, and the tests shown below were conducted. The results are shown in Table 2.
(1) Effect of preventing flying insect pests Various types of aerosols were sprayed on the window glass of a detached house in the forest. After a predetermined period of time, the number of flying insects flying over the treated window glass during one hour was counted, and the flying prevention rate was determined by the following formula.

Inhibition rate (%) = [Number of unprocessed areas-Number of treated areas] / Number of untreated areas

(2) Film formation on the treated glass surface and transparency The film formation and transparency were observed on the treated glass surface, and the results were evaluated based on the following criteria.
Film formation: 3 (significant), 2 (moderate), 1 (slightly present), 0 (almost none).
Transparency: 3 (no effect), 2 (slightly reduced), 1 (slightly reduced), 0 (severely reduced).

As a result of the test, the method of preventing pests flying according to the present invention, that is, the mixing ratio of the aerosol stock solution containing the pyrethroid insecticidal component and the lower alcohol having 1 to 3 carbon atoms and the liquefied gas is 10/90 to 50/50 volume ratio. To the target treatment surface of pests by adopting a method of spraying aerosol particles having an average particle size of 10 to 50 μm and wide-angle spraying using an aerosol that is 1 to 10 mL / m ² It was confirmed that the glass surface could be prevented over a long period of one month or more, and the transparency of the glass surface was hardly impaired because no spray coating was formed. In addition, about spray pattern (SP), 8 cm or more is preferable, and is comprised from a branched saturated alcohol and a C14-C18 fatty acid as an auxiliary | assistant support agent to the target process surface of a pyrethroid type insecticidal component. It was also confirmed that the addition of higher fatty acid esters is advantageous in terms of sustaining the flying prevention effect.
On the other hand, when the aerosol which does not contain a pyrethroid type insecticidal component is used as in Comparative Example 1, the effect of preventing the flying was not obtained. When the mixing ratio of the aerosol stock solution and the liquefied gas is out of the range of 10/90 to 50/50 volume ratio, if the aerosol stock solution ratio is too high (Comparative Example 2), a certain degree of film formation is inevitable, while the comparison When the ratio of the aerosol stock solution was too low as in Example 3, the amount of the aerosol content liquid adhering to the target treatment surface was reduced, leading to a decrease in the flying prevention effect. In Comparative Example 4 where n-paraffin was used in place of the lower alcohol having 1 to 3 carbon atoms as the solvent, the transparency of the glass surface was impaired by the formation of the spray coating. This tendency was also valid when the spray amount of the aerosol stock solution was excessively sprayed exceeding 10 mL / m ² (Comparative Example 5), and did not match the gist of the present invention.

Phenothrin 0.5 w / v%, 2- (4-thiazolyl) benzimidazole 0.2 w / v%, Isocetyl isostearate 3.0 w / v%, 1,3-butylene glycol 5 w / v%, and the balance with ethanol 90 mL of the aerosol stock solution was placed in an aerosol container. A valve portion was attached to the container, 150 mL of LPG and 60 mL of DME were pressurized and filled through the valve portion, and a wide-angle nozzle was loaded to obtain an aerosol used in the present invention.
The average spray particle size of the aerosol was 35 μm, and the SP based on the measurement method was 15 cm.

To plastic resin screen door area of about 10 m ^2, the aerosol 5 mL / m ² as an aerosol stock solution (phenothrin: about 25 mg / m ²⁾ was misty air. This target treatment surface was extremely practical without being sticky and capable of preventing flying insect pests such as mosquitoes, chironomids, butterflies and flyfish over a long period of one month or more.

The pest invasion prevention method of the present invention can be used not only outdoors but also for a wide range of pest control.

Claims (6)

An aerosol comprising a pyrethroid insecticidal component and an aerosol stock solution containing a lower alcohol having 1 to 3 carbon atoms and a liquefied gas, and the composition ratio of the aerosol stock solution and the liquefied gas is 10/90 to 50/50 volume ratio is used. The spray amount of the aerosol stock solution is set to 1 to 10 mL / m ² and spray particles having an average particle diameter of 10 to 50 μm are sprayed on the target processing surface to prevent the pests from flying to the target processing surface. A method for preventing pests from flying, characterized in that After spraying the aerosol toward a vertical plate surface 20 cm away, the maximum diameter of the wet part of the plate surface is measured, and when this is used as a spray pattern (SP), the wide angle is set so that the SP is 8 cm or more. The method for preventing pests from flying according to claim 1, wherein spraying is performed. Flying method for preventing pests according to claim 1 or 2, wherein the spray amount of the aerosol stock solution is 1.5~6mL / m ^2. The insect pest according to any one of claims 1 to 3, wherein the aerosol stock solution further contains a higher fatty acid ester composed of an alcohol having a side chain group and a fatty acid having 14 to 18 carbon atoms. How to prevent flying. The method for preventing pests from flying according to any one of claims 1 to 4, wherein the pyrethroid insecticide is cyfluthrin. The method for preventing pests from flying according to any one of claims 1 to 5, wherein the target treatment surface is a glass surface, and no spray coating is formed on the glass surface.