JPH0445735A - Pest control using aerosol equipment - Google Patents

Abstract

PURPOSE:To accomplish pest control excellent in diffusivity and environmental protection by laying an aerosol equipment filled with active ingredients etc. in a room intended for pest control and by spraying the contents at a time through plural jet nozzles with their spraying angles within a specified range. CONSTITUTION:An aerosol equipment obtained by packing a container with (A) an active ingredient (e.g. pyrethroid-based insecticide) and (B) a propellant (e.g. carbon dioxide, its pressure being pref. 2 - 6kg/cm<2>) into an aerosol is laid in a room intended for pest (e.g. cockroach) control, and the contents is sprayed at a time through plural jet nozzles pref. <= 0.5mm in port diameter with their angles falling between 55 and 85, thus carrying out the objective pest control.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling pests using an aerosol device containing an active ingredient, a solvent, and a propellant sealed in a container.

[Conventional technology]

Various types of aerosol devices are known in which an active ingredient, a solvent, and a propellant are sealed in a container, and when a button on the container is pressed, the active ingredient is sprayed from an injection port to control pests.

In such aerosol devices, solvents and propellants are also injected along with the active ingredients, so in recent years, the problem of environmental pollution and destruction due to the use of large amounts of solvents and propellants has come into focus, and people's awareness of safety has also increased. ing. For example, environmental damage caused by fluorocarbon solvents and propellants.

In pest control, various insects have developed resistance and cross-resistance to organophosphorus insecticides and pyrethroid insecticides, and in order to increase the control effect, various agents with different mechanisms of action are used. , either individually or in combination, or by changing the treatment concentration and treatment time.

For example, pyrethroid compounds exhibit extremely excellent insecticidal effects against various sanitary pests and agricultural and horticultural pests, but their toxicity to warm-blooded animals is low, and they are already widely used as household, epidemic prevention, and agricultural insecticides. However, it is well known that mixed formulations of pyrethroid insecticides and organophosphorus or carba-mate insecticides are effective.

However, since the physical and chemical properties of these drugs often differ significantly, there are various problems that need to be solved when formulating them. Furthermore, even if solubility can be achieved, there are some solvents that are undesirable in terms of toxicity and safety.

In addition, as an example of manufacturing handling, there are only 47 types of organic solvents that require working environment measurements under the Organic Solvent Poisoning Prevention Regulations as of April 1990. The second type includes acetone, methanol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and ethylene glycol monomethyl ether.

In addition, due to manufacturing issues, there are issues such as toxicity and solubility at low temperatures.
It is also necessary to pay attention to the risk of flammability at high temperatures. For example, JISI kerosene, which is a commonly used solvent, is classified as class 4, class 3 petroleum according to the Fire Service Act, so it is important to be aware of the flammability and types of compounds. Accordingly, they are legally classified, and their storage, handling, and quantity are regulated.

In this way, reducing the amount of solvent and propellant used is useful from the viewpoint of manufacturability, handling safety, and cost.

[Problem to be solved by the invention]

However, conventional full-volume insecticidal aerosols are either sprayed upward or diagonally upward in one direction, and both have limited directionality and are slightly less effective. Therefore, it is extremely difficult to apply it to a large room.

Additionally, there are devices that use a large amount of fluorocarbon propellant and are used in large rooms, but these are not desirable from an environmental standpoint.

Furthermore, injection systems having the following shapes have been considered, but all of them have various problems.

In other words, the injection system shown in Japanese Utility Model Publication No. 62-31162 is an aerosol device that is equipped with an injection nozzle at the upper end of the can whose nozzle is oriented tangentially to the axis of the can. When the aerosol contents are injected from the nozzle, the aerosol device rotates due to the reaction, thereby spraying the aerosol contents over a wide range.In such an injection system, the aerosol device is Because it is suspended, it not only rotates but also revolves around its axis, making it impossible to obtain the desired spray pattern.In addition, it is difficult to hang something heavy and rotating around its axis, such as an aerosol device, using a string. It is inconvenient to use because it requires a new hook to be installed on the ceiling that is out of reach and must be hung, and if it is not possible to attach a string to the ceiling, it may not be possible to use it or a separate Since a stand or the like must be prepared to hang the string, there are limitations on where it can be used and there are inconveniences such as lips.

Furthermore, the injection system disclosed in Japanese Utility Model Application Publication No. 63-32666 uses an aerosol device in which an aerosol container is provided with a transfer roller and a support bottle, and the aerosol container is revolved on the surface of the device by the reaction of the injection operation of the aerosol contents. In such an injection system, a supporting bottle is installed on the floor, and it needs to be inserted directly into the floor for support, and it cannot be used unless the floor is made of tatami or wood.
It was not suitable for concrete, etc.

It is also usually used in the center of the room where it can easily be seen by people.
There were scars from bottles on the floor, which was inappropriate.

Also, since it is stationary at the start of the revolution, a large amount of operating energy is required, making it unsuitable for aerosols with weak jetting force such as carbon dioxide gas aerosols, and depending on how the pin is inserted, it may become so stuck that it cannot revolve. Yes, it is easy to cause defective injection.

In addition, a support bin and a transfer roller are required, which increases the cost, which is not preferable.

Therefore, the present invention was developed in view of the above-mentioned problems, and it is possible to improve the diffusivity, significantly reduce the amount of propellant and solvent used in the past, improve safety, and improve environmental protection. The object of the present invention is to provide a pest control method using an aerosol device that is easy to use and has improved manufacturability, handling safety, and efficacy.

[Means and effects for solving the problem] An aerosol device made by filling a container with an active ingredient and a propellant and turning it into an aerosol is placed in a pest control room, and the contents are sprayed at a spray angle of 55° to 85″. This is a pest control method using an aerosol device that sprays most of the spray at one time from a plurality of spray nozzles that have a range of 300 to 3000 mL, which improves dispersion, makes it easy to use, and is inexpensive.

〔Example〕

An example of an aerosol device for implementing the pest control method of the present invention will be explained based on FIGS. 1, 2, and 3.

An aerosol can 1, a cap 2, and an overcap 3 constitute a container A, and the cap 2 is fitted and attached to the aerosol can 1 and has a circular cylindrical shape with a clay wall 4,
The center part of the upper wall 4 is recessed and has a recess 5, and holes 6 are formed on both sides of the recess 5, and a button 7 is provided inside the cap 2. A fitting tube 9 that fits into the stem 8 of No. 1 and the fitting tube 9
The fitting cylinder 9 passes through two passages 11 and is guided to two guide parts 12, and a nozzle 13 having a specified diameter is provided at the tip of each groove part 12. The nozzle 13 protrudes outward from the hole 6 of the cap 2, and the pushing part 10 pushes outward from the opening 14 formed in the bottom wall of the concave part 5 of the cap 2, thereby pushing the pushing part 10 of the button 7. By pushing in, the lock portion 15 is engaged with the locking groove (not shown) of the opposing cap 2, and the stem 8
The configuration is such that the contents of the aerosol can 1 continue to be sprayed by continuously pressing the button.

The elevation angle (angle with respect to the horizontal) of the guide portion 12 is the injection angle θ.

Note that the aerosol device is not limited to the above embodiments, and any configuration for locking the button 7 can be used.Furthermore, after the spray operation is performed, a timer can be activated to delay the start of spraying. It is possible.

Next, a method for controlling pests using the aerosol device described above will be explained.

Place the aerosol device on the floor of the room, remove the overcap 3, and press the pusher 1o to release the two nozzles 13.
13, the contents are injected by the upward angle of the guide portion 12.

As a result, the inside of room B becomes 2 as shown in Figures 4 and 5.
The active ingredient can be efficiently diffused into the room B by forming two high concentration regions C9C and a medium concentration region.

On the other hand, when spraying directly above one nozzle, as shown in Figures 6 and 7, room B has one high concentration area C, one medium concentration area, and one low concentration area E. As a result, the active ingredients cannot be diffused efficiently.

Insecticides used in the present invention include (1) pyrethroid insecticide -α-cyanophenoxybenzyl-isobrobyl-4-
Chlorophenyl acetate (-Ship name Fuenvalerate;
Product name: Sumicidine; Manufactured by Sumitomo Chemical Co., Ltd. (hereinafter referred to as Sumicidine) φ3-phenoxybenzyl 22-dimethyl-3-(2',2'-dichloro)vinylcyclopropane lupoxylate (-Ship name: Vernathrin,
Product name Exmin, manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Exmin) ・3-Phenoquine benzyl d-ence/transucrysantemate (-Ship name: Fetuthrin; Product name Smithlin, manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Sumitrin) ) ・3-allyl-2-methylcyclobenter-2-ene-4
-one-1-yl dl-ence/trans-chrysanthemate (generic name allethrin; trade name pinamine: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as pinamine) φ3-aryl-2-methylcyclobenter-2-ene-4
-on-1-yl d-cis/trans-chrysanthemate (trade name: Pinamin Forte; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Pinamin Forte) @d-3-aryl-2-methylcyclopent-2-ene -4-one-1-yl d-trans-chrysanthemate (trade name: Exlin; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Exlin) (S)-a-cyano-3-phenoxybenzyl (IR, cis)-3 -(2,2-dibromovinyl)-2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as decamerin) (R,S)α-cyano-3-phenoxybenzyl (IR,l5)-cis/trans-3-( 2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as cypermethrin) ・a-cyano-3-phenoxybenzyl α-cis/trans-chrysanthemate (hereinafter referred to as cyphenotrin) ・α- Cyano-3-phenoxybenzyl 2゜2.3.
3-tetramethylcyclopropanecarboxylate (-
Ship name: Fuenbrobatrin (hereinafter referred to as Fuenbrobatrin) ・N-(3,4,5,6-titrahydrophthalimide)
-Methyl chrysanthemate (-ship name; phthalthrin) 5-benzyl-3-furylmethyl chrysanthemate (-ship name; resmethrin) 5-propargyl-3-furylmethyl chrysanthemate (-ship name; flamethrin) Φ2 -Methyl-5-propargyl-3-furylmethyl chrysanthemate (-ship name: proparsulin) -1-ethynyl-2-methyl-2-pentenyl cis/trans-chrysanthemate 1-ethynyl-2-methyl-2 -Pentenyl 2.2-
Dimethyl-3-(2-methyl-1-propenyl)cyclopropane-1-carboxylate-1-ditinyl-2-methyl-2-pentenyl 2.2,
1-ethynyl-2-methyl-2-pentenyl 2.2- in 3.3-tertramethylcyclopropanecarboxylate
Dimethyl-3-(2,2-dichlorovinyl)cyclopropane-1-carboxylate ・2-(4-ethoxyphenyl)-2-methylpropyl-8-phenoxybenzyl ether (ethofenbrox) ・2,3,4 ,5.6-pentafluorobenzyl 3-
(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (fenfluthrin) IR5)-a-cyano-3-phenoxybenzyl (R)
-2-(2-chloro-4-trifluoromethylanilino)-3-methylbutanoate (fluparinate) -2-methyl-3-(prob-2-ynyl)-4-oxo-cyclopent-2-enyl-d -cis/trans-
Chrysanthemate (prarethrin) A pyrethroid insecticide such as 2,4-dioxo-1-(prob-2-ynyl)-imidazoliden-3-ylmethyl (IR)-cis, trans-chrysanthemate.

(2) Organophosphorus insecticides ・0,0-dimethyl 〇-(3-methyl-4-nitrophenyl)thionophosphate (hereinafter referred to as Sumithion) ・0.0-diethyl 0-2-isopropyl-4- Methyl-pyrimidyl-(3)-thiophosphate (hereinafter referred to as diazinon) ・0.0-dimethyl 5-(1,2-dicarboethoxyethyl)-dithiophosphate (hereinafter referred to as marathon) ・0,0-dimethyl 0- (2,,2-dichloro)vinyl phosphate (hereinafter referred to as DDVP)・0-(4-
Pro%-2.5-', ;chlorophenyl) 0.0-dimethylphosphorothioate (hereinafter referred to as bromophos) ・0.0-diethyl-〇-(3-oxo-2-phenyl-2H-pyridadin-6-yl) phospho Lothionate (
(hereinafter referred to as pyridafenthione) (3) Carbamate insecticide/0-isopropoxyphenyl methyl carbamate (
5-methoxy-3-(0-methoxyphenyl)-1,
3,4-Oxadiazol-2(3H)-one (-Ship name: Methoxacyacin 1 Trade name Niremic; Sumitomo Chemical Co., Ltd., K) ・Ninaphthyl Methyl carbamate (carbaryl) -2-Ethylthio Methylphenyl methyl carbamate (i Thiophene Curve) Various commonly used additives such as potency enhancers, antioxidants, ultraviolet absorbers, deodorants, fragrances, and colorants can be optionally added to the above-mentioned drug in the present invention.

Potency enhancers include biperonylbutoxide, octachlorodipropyl ether, isobornyl thiocyanoacetate, N-(2-ethylhexyl)-bicyclo[2,2,1]-hebuta-5
-ene-2,3-dicarboximide, N-(2-ethylhexyl)-1-isopropyl-4-methylbicyclo[2,2,2]oct-5-ene-2,3-dicarboximide and β- Butoxy-β'thiocyanodiethyl ether.

In addition, commonly used repellents and miticides can also be used.

(Direct) Repellents include: -N,N-diethyl m-toluamide (hereinafter referred to as DET), Kenji n-butyl succinate (hereinafter referred to as DNBS), e-G n-propyl isocincomeronate (hereinafter referred to as DP).
(referred to as IC) Tetramethylthiuram disulfite, guanidine, naphthalene cresol, cycloheximide, zinc dimethyl dithiocarbamate, cyclohexylamine, N-N
-dimethylsulfenyldithiocarbamate, 2.6-
Dimethyl-octadiene-(2,6)-a l (8
) (hereinafter referred to as citral), 0.0-diethyl 5-2
-Ethylthioethyldithiophosphate (ETP)
), 00-dimethyl 5-2-isopropyl 1,000 nityl dithiophosphate (hereinafter referred to as MIP), r-floralose.

4-(Methylthio)-3,5-xylyl N-methylcarbamate, 4-aminopyridine anthraquinone, tetramethylthiraum disulfide, diallyl disulfide, as a solvent or extender e kerosene/acetone Q ethanol, propyl alcohol, isopropyl Alcohol, 3-methyl-3-methoxybutanol (Soffit), ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoisoprobyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene Glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether N-(2-
ethylhexyl)-1-isopropyl-4-methylbicyclo[2,2,2]oct-5-ene-2,3-dicarboximide (hereinafter referred to as CP5), N-(2-ethylhexyl)-bicyclo[2,2 ,11-5-heptene-
2,3-dicarboximide (hereinafter referred to as CP2), methyl arachinate, ethyl arachinate, isopropyl arachinate, n-butyl arachinate, isobutyl arachinate, octyl arachinate, riesene, methyl behenate, ethyl behenate, behenin Isopropyl acid, n-butyl behenate, isobutyl behenate, Sesamex, methyl ribnocerate, ethyl linoleate, isopropyl linoleate.

Methyl oleate, ethyl oleate, isopropyl oleate, n-butyl oleate, isobutyl oleate, pentyl oleate, sulfoxide, ethyl linoleate, methyl linoleate, isopropyl linoleate, n-butyl linoleate, isobutyl linoleate, Ethyl linoleate, butyl linoleate, octachlorodipropyl ether, dibutyl phthalate, dioctyl phthalate,
Methyl stearate, ethyl stearate, isopropyl stearate, n-butyl stearate, isobutyl stearate, isobonyl thiocyanoacetate, octyl laurate, n-butyl myristate, isobutyl myristate, octyl myristate, alpha [2-(2) −
butoxyethoxy)ethoxy]-4,5-methylene 2-
Propyltoluene, methyl palmitate, ethyl palmitate, isopropyl palmitate, n-palmitate
Examples include butyl, isobutyl palmitate, octyl palmitate, but are not limited to these.

In addition, among carbamate compounds, 5-methoxy-3
-(0-Methoxyphenyl)-1゜3.4-Oxadiazol-2(3H)-one (methoxacyacin) is widely commercialized? This methoxacyacin is a solid at room temperature (mp, 77°C). It has the property of being difficult to dissolve in paraffinic solvents and alcoholic solvents.

It is easily soluble in some of the organic solvents listed above that require measurement of the working environment, such as acetone, ethylene glycol monomethyl ether, and ethylene glycol monoethyl ether.

The inventors of the present invention have considered handling and environmental safety, and have found that the following solvents can be used for aerosol insecticides: diethylene glycol monomethyl ether diethylene glycol monoethyl ether diethylene glycol monobrobyl ether diethylene glycol monoisobrobyl ether Diethylene glycol monobutyl ether 3-methyl-
We have found that 3-methoxybutanol is preferred.

For these aerosol agents, the volume ratio of the undiluted propellant is preferably 4/6 or less, particularly 2/8 or less, which enables fine atomization of sprayed particles and diffused spraying.

It is preferable to reduce the amount of solvent as long as it is possible to manufacture it, and methods such as heating and dissolving the raw material or making it into a high-temperature solution, filling the raw material and solvent separately, and filling and dissolving the propellant, or injection Methods such as dissolving the original substance in the kami j and then filling it can be used.

As a propellant, dimethyl ether L, P.

G, nitrogen gas, carbon dioxide gas, etc. can be used, and a mixture of these gases can also be used. It is preferable to use a propellant of 2-6 kg/c- at 20°C.

Further, the spray nozzle is optimally 1.0 mm or less, and particularly 0.5 mm or less, which enables finer spray particles and spraying over a long distance.

A test example will be explained.

(Test 1) 1.5 g of permethrin and 0.75 g of methoxacyacin were dissolved in diethylene glycol monomethyl ether,
7 mg dimethyl ether, liquefied petroleum gas (70:
30) was added as a propellant to make the total amount 50 mN.

There are two injection ports (0,311 mφ), and the angle θ from the horizontal is 40' 55 @ 70"85", and for comparison, one injection port (0,3 + nφ) is used to spray directly upward. They were made and made into aerosols.

1 on the four corners and diagonally of the 10 tatami room B as shown in Figure 8.
Petri dishes A containing wooden shelters were placed at four points of the /4 division, and 25 pyrethroid-resistant German cockroaches (female) were released in each.

The test sample was sprayed in the center of the room, and the German cockroaches were collected after a knockdown time and 2 hours of exposure.
The mortality rate after hours was examined.

The results are shown in Table 1 below.

According to the table below, for pyrethroid-resistant German cockroaches, spray angles of 55° to 8
At 5″, the knockdown time (KT50) is fast;
Mortality rate (K T 50) was also high.

Furthermore, when similar tests were conducted with normally susceptible German cockroaches, high mortality rates were obtained in all cases, but a similar trend was observed regarding the knockdown time (KT50).

(Test 2) Dissolve 1.0 g of cyphenotrin and 1 g of methoxacyacin in diethylene glycol monoethyl ether,
m l', dimethyl ether, liquefied gas (95:5
) was added as a propellant to prepare an aerosol with a total amount of 50 rnQ, and the same efficacy test as Test 1 was conducted.

At this time, the injection port was 40 and the injection angle was 70°. Also, add each compound/propellant in the same ratio to the content composition, and the total amount is 100.150mf! A similar efficacy test was conducted on 20 tatami mats and 30 tatami mats, respectively.

The results are shown in Table 2 below. All results were good, and sufficient efficacy was obtained with a small amount of injection.

(Test 3) Phenothrin 2. Qg, 1.0 g of fenitrothion, 20 ml of ethanol) were dissolved in JISI kerosene, and 30
ml, and dimethyl ether and liquefied petroleum gas (-50 ny 50) were added as propellants to make the total amount 100 mg. Nozzles (1, 2, 4, and 6 nozzles each having a diameter of 0.311 mm and an angle of θ60'' from the horizontal) were prepared, and each was made into an aerosol.

As shown in Figure 9, there are wooden shelters in the four corners of 20 tatami room B.
Two petri dishes each containing 25 pyrethroid-resistant German cockroaches (female) were released into each.

The test sample was sprayed in the center of the room, the 20 tatami room was divided into left and right halves, and the knockdown time of the test insects in each room was measured. However, for the case with one nozzle, measurements were taken for one injected to the right from the center position and one injected to the left from the right corner of the room. I checked the knockdown time.

The results are as shown in Table 3, Table 3 Sample Sun Injection Port (pcs) T50 Average Value of 4 Samples (Minutes) Pull Left Room Right Room (Right Direction Injection) (Injection from Right Corner) 60 or More 60 or More Injection By having two or more mouths, stable efficacy could be obtained in every corner of the room.

In addition, with the one having -1 injection port, sufficient efficacy could not be obtained even if the installation method was changed.

〔Effect of the invention〕

Since it is a pest control method that has two or more injection ports and sprays at an angle of 55 to 85#, for example, when there are two injection ports,
If a nozzle of the same diameter is used, compared to a single nozzle, the entire amount can be sprayed quickly, and a sufficient amount of the chemical can be applied before the target pest, such as a cockroach, notices the chemical adhesion and runs away. In addition, compared to the upward one-way spray method, the high concentration area of the drug is wider and more uniform, there is no lower concentration area, and the dispersion of the drug when it falls on the floor etc. is significantly reduced, eliminating the need for the center of the room. There will be no high concentration.

In addition, since it is sprayed at an angle in the range of 55@~85'', the active ingredient can be scattered far, expanding the area where the active ingredient spray falls, expanding the usable room, and ensuring sufficient efficacy. Furthermore, in the past, the aerosol capacity was large, for example, 100 nl per 10 tatami mats, so it was not possible to use large amounts of explosive propellants such as liquefied petroleum gas and dimethyl ether, and non-flammable However, according to the method of the present invention, the total amount of injection can be reduced, the above-mentioned dangers are significantly reduced, and a small amount can be used in a large room to achieve sufficient effectiveness. It is possible.

Further, since the user does not need to perform any special operations, it is easy to use, and it is inexpensive because it does not require the use of special members.

[Brief explanation of drawings]

Figures 1, 2, and 3 show an example of an aerosol device, with Figure 1 being a perspective view of the exterior, Figure 2 being a sectional view, Figure 3 being a perspective view of a button, and Figures 4 and 5. The figure is an explanatory diagram of the injection state,
FIGS. 6 and 7 are explanatory diagrams of the injection state of a conventional aerosol device, and FIGS. 8 and 9 are plan views showing test examples. fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig.

Claims (1)

[Claims] An aerosol device made by filling a container with an active ingredient and a propellant and turning it into an aerosol is placed in a pest control room, and the contents are sprayed for a period of time through multiple injection ports with spray angles in the range of 55° to 85°. A pest control method using an aerosol device, characterized in that the aerosol device sprays