JPH0323523B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for controlling mites. [Prior Art] Conventionally, in order to exterminate insect pests and microorganisms such as dust mites on tatami mats, the tatami mats are raised and treated with sunlight outdoors without the use of chemicals, or chemicals such as insecticidal powders are used. Methods such as spraying or applying an insecticidal liquid on the tatami mats have been adopted, but the conventional methods described above do not have a sufficient effect on exterminating pests and microorganisms. A coating method is also considered, but it has not been possible to achieve a satisfactory control effect because the penetration and expansion of the drug into the tatami is insufficient. In addition, due to changes in the living environment in recent years, dust mites and other insects have appeared in homes, which not only cause discomfort but also cause problems such as allergic asthma, and the development of methods to control these mites. is required. [Problems to be Solved by the Invention] Therefore, the present inventors have conducted intensive research to solve the problems of the prior art described above, and as a result, have developed an aerosol for controlling mites consisting of a specific active ingredient and a specific propellant. We discovered that when injected into tatami mats, it has an excellent control effect against dust mites.
The present invention has now been completed. [Means for Solving the Problems] That is, the present invention uses an active ingredient solution prepared by dissolving at least one of phenotrin, permethrin, and resmethrin as an active ingredient in a solvent whose vapor pressure is equal to or lower than the injection pressure at room temperature. The present invention relates to a method for controlling mites, which comprises injecting an aerosol agent for controlling mites into tatami mats. [Example] The active ingredient of the indoor mite control agent of the present invention is phenothrin (3-phenoxybenzyl d-
cis/trans-chrysanthemate), permethrin (3-phenoxybenzyl dl-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethyl-1-cyclopropanecarboxylate)
and resmethrin ((5-benzyl-3-furyl)methyl dl-cis/trans-chrysanthemate). These compounds are one type of pyrethroid compounds, and because they exhibit superior mite control effects compared to other pyrethroid compounds, they are used as active ingredients in the mite control agent in the present invention. In the present invention, the mite control agent includes pyrethroid compounds other than phenothrin, permethrin, and resmethrin, such as
dl-3-allyl-2-methyl-4-oxo-2-
Cyclopentenyl dl-cis/trans-chrysanthemate (hereinafter referred to as allethrin), (1,3,
4,5,6,7-hexahydro-1,3-dioxo-2-isoindolyl)methyl dl-cis/trans-chrysanthemate (hereinafter referred to as phthalthrine), 1-ethynyl-2-methyl-2-pentenyl 2, 2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as empensuline), 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2',2'-diclobinyl)-cyclopropane -1-carboxylate,
1-ethynyl-2-methyl-2-pentenyl 2,
2-dimethyl-3-(2'-methyl-1'-propenyl)-cyclopunpan-1-carboxylate or the like may be used in combination. In addition to the above-mentioned pyrethroid compounds, other active ingredients may be added as necessary. As the active ingredient, for example, 2-isopropoxyphenyl-N-
Carbamate compounds such as methyl carbamate and 1-naphthyl-N-methyl carbamate; 3-
Methyl-1,5-bis(2,4-xylyl)-1,
3,5-triazapenta-1,4-diene, 2,
4-dinitro-6-sec-butylphenyl dimethyl acrylate, 6-methylquinoxaline-2,
3-dithiocarbonate, bis(chlorphenyl)trichloroethanol, ethyl 4,4'-dichlorobenzilate, 1,2,4,5,6,7,8,
8-octachlor-2,3,3a,4,7,7a-
Hexahydro-4,7-methanoindene, dimethyl (3-methyl-4-nitrophenyl) thiophosphate (hereinafter referred to as fenitrothion), 0,
0-Dimethyl-0-[3-methyl-4-(methylthio)phenyl]thiophosphate, (2-isopropyl-4-methylpyrimidyl-6)-diethylthiophosphate, dimethyldicarbethoxyethyldithiophosphate, dimethyldichlorvinyl Examples include phosphate. By using a drug containing the pyrethroid compound as an active ingredient, it is possible to effectively control the occurrence of mites such as white mites, black mites, dust mites, and lice mites. The aerosol agent for controlling mites used in the present invention includes a bactericide, a pest and rodent repellent,
Deodorants and fragrances may also be added. As a fungicide, 2,4,4'-trichloro-
2'-Hydroxydiphenyl ether, 2,3,
5,6-tetrachloro-4(methylsulfonyl)
Pyridine, alkylbenzyldimethylammonium chloride, benzylmethyl {2-[2-(P-
1,1,3,3-tetramethylbutylphenoxy)ethoxy]ethyl}ammonium chloride, 4-isopropyltropolone, N-dimethyl-N-phenyl-N'-(fluoromethylthio)sulfonamide, 2-(4 '-thiazolyl)benzimidazole, N-(fluorodichloromethylthio)-phthalimide, 6-acetoxy-2,4
-dimethyl-m-dioxin, etc., and these agents are effective in controlling molds such as Aspergillus, Penicillium, and Chaetomium. The pest and rodent repellents include 2,3,4,5-bis(Δ-butylene)-tetrahydrofurfural, N,N-diethyl-meta-toluamide, and di-n-propyl isocincoro. mate, di-normal-butyl succinate, 2-hydroxyethyloctylsulfite, 2-t-butyl-4-hydroxyanisole, 3-t-butyl-4-hydroxyanisole, cycloheximide, β-nitrostyrene cyanoacrylonitrile, tributyltin chloride,
Examples of the trinitrobenzene-aniline complex, naphthalene, and deodorants include lauric acid methacrylate; and aromatic agents include rush essential oil components, citronella, lemon, lemongrass, orange, eucalyptus, and lavender. The aerosol agent for controlling mites used in the present invention may further contain various additives such as an efficacy enhancer and a desiccant (such as a superabsorbent resin), if necessary. The aerosol agent for controlling mites used in the present invention is, for example, a tubular body comprising at least one tube having at least one nozzle hole in at least a part of the circumferential surface of the body of the tubular body having a shape capable of piercing a tatami mat. The tip of the tubular body has a substantially blind shape, and the tubular body is used by being filled into a tatami treatment tool having a nozzle diameter of 0.1 to 1.0 mm. The shape of the tubular body (hereinafter referred to as the main body) is that the tip thereof is approximately blind, and has a shape that allows the tip of the body to be easily penetrated into the tatami from any direction from the front, back, or side. There are no restrictions on length or size (width) as long as the length is 5 cm, but the length is preferably less than 5 cm, in accordance with the tatami standard (5 cm thick).
Any thickness that does not leave puncture marks on the tatami mat when removed can be used. Furthermore, the main body may be telescopic, bendable (including those having a rubber tube in the middle), detachable, removable, freely rotatable in the axial direction, or may be composed of a plurality of bodies. Materials that are compatible with these forms can be appropriately selected and used. By making it rotatable as described above, the position of the nozzle hole can be appropriately changed and used, so even when there is only one nozzle hole, it is possible to spray over a wide range, which is advantageous. Furthermore, a fitting part for the push button may be provided at the base end of the main body, so that when using an aerosol, for example, it can be easily set by simply fitting it into an existing push button or jet tube. Although this is advantageous, it is also possible to provide a push button at the proximal end of the main body. The area of the nozzle hole provided in the main body may be the same as or smaller than the inner diameter of the main body, and the nozzle diameter is usually in the range of 0.1 to 1.0 mm, preferably 0.3 to 1.0 mm.
0.6mm, and if a fitting part or push button is provided as described above, the nozzle hole diameter of the push button ≧ the inner diameter of the main body ≧
It is advantageous to establish a relationship between the diameters of the nozzle holes in the main body because the spray condition will be good. However, if more uniformity is required in a weak spray state, this does not particularly apply. The number of nozzle holes in the nozzle is determined from the above relationship. The shape of the injection hole of the nozzle may be not only a normal shape but also a slit shape, and in this case, it may be either vertically long or horizontally long (including a ring shape). It is advantageous for spraying, and if it is horizontally long, it is suitable for flat treatment over a wide area in all directions of the tatami mat, and by using these in combination, a more preferable spray state can be obtained. Furthermore, it is advantageous to use a cross-shaped front face as a combined type because the advantages of both can be obtained at the same time. Regarding the method of providing the above-mentioned nozzle holes in the main body, at least one or more may be provided on at least one part or more of the outer peripheral surface of the body of the main body, and they may be provided at appropriate intervals in the longitudinal direction of the main body. In this case, it is advantageous because each layer making up the tatami can be treated at once, similar to the case with the vertically elongated slit-shaped nozzle holes. Furthermore, by providing nozzle holes at positions corresponding to each layer constituting the tatami mat, it may be possible to perform the treatment with one touch. At this time, it is advantageous to provide the nozzle holes in a staggered manner, as this allows a wider range of treatment to be performed. In the present invention, any injection mechanism used in this type of application can be used as the injection mechanism applied to the main body, such as an aerosol type,
Those using various pumps, those using cylinders,
It can be used in combination with a compressor as appropriate. When using the above-mentioned cylinder, the pressure is quite high, so it is used by attaching it to a suitable spray gun. Other suitable auxiliary means may be adopted for the main body, for example, the tip of the main body can be attached and detached at an appropriate position in the longitudinal direction of the main body (of course, the proximal end is also possible) for safety when not in use. You can replace the top and bottom or left and right, or have a stopper on the main body that can slide up and down or left and right.When in use, it is used to adjust the degree of entry of the main body into the tatami mat, and when not in use, it is used to adjust the degree of entry of the main body into the tatami mat. By shifting the stopper toward the tip, stopping when the tip is no longer visible, and fixing the main body to the body with a set screw, the tip of the main body can be protected and injuries caused by misuse can be avoided. In addition, the tubular body can be stored in the container so that it can be moved in and out, and a part of the container is retracted, so that the tubular body can be used.When not in use, the main body is stored in the container. Although it is safe, the container may be equipped with a suitable stopper just to be safe. Furthermore, instead of being housed in the container, the main body itself may be used in combination with, for example, a bellows upper cover and a stopper that prevents the cover from shrinking. In the present invention, the sprayer as one of the above-mentioned spraying mechanisms may be an automatic spray type with an intermittent valve, and the main body of the sprayer is directed toward a location where cockroaches are infested, such as a gap behind a tatami mat. If set in advance, aerosol can be automatically and intermittently sprayed to areas where cockroaches are infested. In the present invention, the hole diameters of the main body nozzle, push button nozzle, and valve stem are in the range of 0.3 to 0.6 mm, and the hole diameter of the injection valve housing and vapor tap are in the range of 0.3 to 0.5 mm. ,
Further, it is possible to adopt a configuration in which the difference between the hole diameter of at least one selected from the housing of the injection valve and the dip tube and the hole diameter of the vapor tap is within 0.1 mm. In this case,
As the filling liquid, one can advantageously be used which contains 30 to 60% by volume of the active ingredient solution when the active ingredient solution and propellant are combined. In aerosols that are normally used upright, the hole diameter of this housing is 0.7 to 1.5 mm, the diameter of the dip tube is 1 to 3.5 mm, and the hole diameter of the vapor tap is about 0.25 to 0.4 mm.
The difference greatly exceeds 0.1mm, and if this is used in an inverted position, a large amount of propellant will be sprayed, and the ratio with the active ingredient solution in the aerosol can will be disrupted. For example, in the case of insecticides, the effectiveness will be uniform, and the amount of injection per unit time for upright and inverted positions will be reduced, and the propellant will not run out first and only the active ingredient solution will remain without being sprayed. It has the advantage that the amounts can be made almost the same. The active ingredient solution referred to in the present invention is a solvent whose vapor pressure is substantially lower than the injection pressure at room temperature, such as hexane, 3,3,4-trimethylnonane, cyclohexane, kerosene,
naphtha, normal paraffin, isoparaffin,
Petroleum-based solvents such as liquid paraffin, chlorinated hydrocarbons such as dichloroethane and trichloroethane, alcohols and ether derivatives such as ethyl alcohol, isopropyl alcohol, and ethylene glycol, and solvents such as water, and at least the above-mentioned active ingredients allethrin, permethrin, and phenothrin. Type 1, organophosphorus insecticides such as DDVP and fenitrothion, synergists such as carbamate insecticides and piperonyl butoxide, and deodorizing or deodorizing agents are dissolved as they are or emulsified with a surfactant. It is something that Examples of propellants include fluorocarbons (Freon-11, Freon-12, Freon-142b, Freon-152a, Freon-123, Freon-134a, Freon-
22, Freon-113, etc.), liquefied petroleum gas, dimethyl ether, carbon dioxide gas, etc. are used alone or in combination. Next, an example of the formulation of the aerosol agent for controlling mites used in the present invention will be explained. Formulation Example 1 0.3 parts by weight of at least one of phenothrin, permethrin, and resmethrin, 7 parts by weight of xylol, and 7.7 parts by weight of deodorized kerosene were mixed and dissolved. After filling this into an aerosol container and attaching a valve part, the valve part was sealed and 85 parts by weight of liquefied petroleum gas was filled under pressure to obtain an aerosol of a tick control agent. Next, the method for controlling mites of the present invention will be explained in more detail based on Examples, but the present invention is not limited to these Examples Examples 1 to 6 150ml of a kerosene solution containing 1.33% of the pyrethroid compound permethrin and 150 ml of liquefied petroleum gas were filled into an aerosol can with a content of 390 ml and sealed with a valve as shown in Table 1 to obtain an aerosol. Attach a button to this and connect it to the main body, and conduct a spray test (30 seconds each). If the difference between standing upright and inverted is within 10%, it is acceptable, and within 20% is acceptable. The results are also listed in Table 1.

[Table] Examples 7 to 10 In Example 1, dimethyl ether was used as the propellant.
An aerosol was obtained in the same manner as in Example 1, except that 70 ml and 80 ml of liquefied petroleum gas were used. Table 2 shows the physical properties of the aerosol obtained.

[Table] Example 11 (Diffusion test) Prepare a 90 cm x 180 cm x 5 cm tatami mat as shown in Figure 1, and set the center A and the center equidistant from A (45 cm).
cm) at each point B and C of the main body (length: 4.5 cm,
Inner diameter: 0.72 cm, nozzle hole diameter: 0.2 cm x 8 cm, divided into 4 stages, spraying toward the front, back, left side, right side, and each direction rotated 45 degrees). It was attached to a 300 ml aerosol and sprayed for 20 seconds (10 ml) at each point to inject the drug solution (1.33 wt% permethrin solution in kerosene). The results are shown in Figures 3-5. 3rd to 5th
The figures are side views of the long sides of the tatami mats shown in Figure 1.
This is a cross-sectional view taken along the Z′ line. Note that the shaded area in the figure indicates the part of the tatami mat where the chemical solution was diffused. As is clear from the hatched areas in Figures 3 to 5, it can be seen that the chemical solution is uniformly diffused in the thickness direction of the tatami mat. Example 12 (Insecticidal Efficacy Test) Main body (length: 5 cm, inner diameter: 0.75 cm, nozzle hole position: 2 nozzle holes on opposite sides of the nozzle circumference at 5 mm, 15 mm, 25 mm, and 40 mm from the base end) number of 2×
4. Attach this to a 300ml aerosol (containing 2% by weight of fenitrothion and 0.5% by weight of resmethrin as main ingredients) using a nozzle hole diameter: 0.2cmφ).
Apply the drug (fenitrothion as the active ingredient) for 20 seconds (10 ml) to the center of the prepared tatami mat (90 cm
After injecting 2,000 mg of resmethrin and 50 mg of resmethrin, each part of A, B, and C shown in Figure 6 (10 cm from the center, 25
Cut a small piece of 5 cm x 5 cm x 5 cm (at a position of 45 cm), crush the cut part into 2-3 mm pieces, mix well, and then put 5 g of it into a shear dish, and 50 adult mites. This is done at a temperature of 20℃ and a humidity of 80~
The cells were placed in an 85% constant temperature room and cultured for 10 days. After 10 days had passed, 500mg of the solution was taken out and the number of mites inhabiting it was observed using a stereomicroscope. The result is the fourth
Shown in the table. The results for the untreated plot are also shown in Table 3 as a control.

【table】

[Table] Untreated area
As is clear from Table 3, when the tatami treatment tool was used, there was a significant difference compared to the untreated area, and the use of the tatami treatment tool was extremely effective in exterminating pests due to the effective permeation and diffusion of chemicals. It is clear that this can be achieved. Experimental example Place a new tatami (45cm x 45cm) in the center of a vat filled with water to prevent the mites from escaping.After confirming that the moisture content of the tatami exceeds 10%, add 2g of saturated medium (approx. (per 10,000 heads/g) and stored at a temperature of 25% and humidity of 90% RH. Approximately two weeks later, when woolly mites were confirmed on the surface of the tatami, the test chemicals (3 g of permethrin, 150 ml of the solvent shown in Table 4) and liquefied petroleum gas (150 ml of the solvent shown in Table 4) were added.
ml) was injected into the tatami from one place in the center of the tatami for a predetermined period of time, or uniformly sprayed onto the tatami surface from a height of 40 to 50 cm for a predetermined period of time, according to the instructions for use. Before chemical treatment and 1 day, 3 days and 7 days after treatment, black paper (10 cm x 10 cm) was placed on the center and end of the tatami, and after 6 hours, the number of mites that had crawled onto the black paper was counted. . In the same manner as above, the number of mites crawling on black paper was counted for untreated tatami and used as a comparison. The water-based aerosol used was composed of 3 g of permethrin, 6 g of surfactant, 150 ml of purified water, and 150 ml of dimethyl ether. The above results are shown in Table 4.

[Table] [Effect of the invention] When using the tick control method of the present invention, the agent is connected to an aerosol and inserted into the tatami mat to be sprayed. A very good spray condition can be obtained from the nozzle holes, and a very good diffusion distribution condition can be obtained in the tatami mat. In addition, very good results have been obtained in terms of insecticidal effect, and it can be suitably used as an insecticide for tatami mats.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tatami mat used in the embodiment of the present invention.
Figure 2 is a side view of the long side of the tatami mat shown in Figure 1.
Figures 3 to 5 are X-X' line and Y- line in Figure 2, respectively.
6 is a plan view of the tatami mat used in the embodiment of the present invention. Reference numbers in the drawings, A to C: injection points.

Claims (1)

[Scope of Claims] 1. An aerosol agent for controlling mites comprising an active ingredient solution prepared by dissolving at least one of phenothrin, permethrin, and resmethrin as an active ingredient in a solvent whose vapor pressure is lower than the injection pressure at room temperature, and a propellant. A mite control method characterized by injecting into tatami mats. 2 Solvents whose vapor pressure is less than the injection pressure at room temperature are petroleum solvents, chlorinated hydrocarbons, alcohols,
The method for controlling mites according to claim 1, which comprises at least one of an ether derivative and water. 3. The method for controlling mites according to claim 1, wherein the active ingredient solution contains a synergist or an insect repellent.