JP2012158583A - Method for controlling harmful arthropod, composition, and electrostatic spray device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for effectively controlling harmful arthropods without carrying out any heating process (e.g., smoking process) or any pressure process (e.g., gas pressure process or a mechanical pressure process) for spraying.SOLUTION: In the method for controlling harmful arthropods, a composition, which contains an ester compound represented by formula (1) in an amount effective for controlling a harmful arthropod, is electrostatically sprayed to the arthropod or the habitats of the arthropod.

Description

  The present invention relates to a method for controlling harmful arthropods including flying insects, a composition, and an electrostatic spraying device.

  The ester compound represented by the formula (1) shown below is known to be effective for controlling so-called pests, and is disclosed in Patent Document 1. Hereinafter, pests to be controlled in this specification, specifically arthropods such as insects, are sometimes collectively referred to as “harmful arthropods”. In the present specification, “control of harmful arthropods” means behavioral changes of harmful arthropods by repelling, attracting, knocking down or killing. “Effective for control” means supplying an amount of an active ingredient capable of changing the behavior of a target harmful arthropod.

  In general, for the control of harmful arthropods, an active ingredient having a controlling effect is sprayed using a method such as heating (for example, smoke), pressurization (for example, gas pressure or mechanical pressure), Directly or indirectly, or by contact with harmful arthropods continuously or intermittently.

  Furthermore, electrostatic spraying capable of forming a liquid Taylor cone and spraying liquid particles from its tip is known in the art (see, for example, Patent Document 2 and Non-Patent Document 1).

Japanese Patent Publication “Japanese Patent Laid-Open No. 2001-11022” (published on January 26, 2001) European Patent Application No. 1399265

Proceedings of the Royal Society-1964, p383-397

  There is a need for a method for efficiently spraying the ester compound represented by the above formula (1) to control harmful arthropods and a composition that can be sprayed efficiently.

  The present invention has been made in view of such circumstances, and does not require heating (for example, smoke) or pressurization (for example, gas pressure or mechanical pressure) for spraying, and effectively controls the treatment. It is an object of the present invention to provide a method for controlling harmful arthropods that can be performed. Another object of the present invention is to provide a composition capable of controlling a wide variety of harmful arthropods. Furthermore, an electrostatic spraying device that can easily spray the composition of the present invention without requiring heating and pressurization for spraying, and can effectively perform control treatment of harmful arthropods. The purpose is also to provide.

  As a means for solving the above-mentioned problem, a method for controlling harmful arthropods according to the present invention is represented by formula (1)

The composition containing the ester compound represented by the above is characterized by electrostatically spraying a harmful arthropod or a habitat of the harmful arthropod in an amount effective for controlling the harmful arthropod.

  In addition, the composition of the present invention has the formula (1)

In which the electrical resistance value is 1 × 10 ³ Ωm or more and 1 × 10 ⁶ Ωm or less at 20 ° C., the viscosity is 1 mPa · s or more and 10 mPa · s or less at 20 ° C., and the surface tension is 20 It is 20 mN / m or more and 40 mN / m or less at ° C.

According to the control method of the present invention, heat, pressurization (for example, gas pressure or mechanical pressure), or fumes are not required for spraying, and the control process can be performed effectively. Moreover, according to the composition of the present invention, a wide variety of harmful arthropods can be controlled. Furthermore, according to the electrostatic spraying apparatus of the present invention, the composition can be sprayed easily without the need for heat, pressurization (for example, gas pressure or mechanical pressure), or fumes for spraying. It is possible to control harmful arthropods.

It is a schematic diagram which shows the electrostatic spraying apparatus used for spraying of the composition of this embodiment.

Hereinafter, an embodiment of the present invention will be described.

  The composition according to this embodiment is suitably used in the method for controlling harmful arthropods according to this embodiment as will be described later, and (i) an ester compound represented by formula (1), (ii) dispersion Contains medium. (Ii) Among the substances that can be selected as the dispersion medium, a dispersion medium having a physical property adjusting function for adjusting the physical properties of the composition, in particular, the electric resistance value, the viscosity, and the surface tension (hereinafter referred to as a physical property adjusting component). May be included.).

(Ester compound)
The composition of this embodiment contains the ester compound of Formula (1). The ester compound is a compound having an excellent control effect against harmful arthropods.

  The ester compound of formula (1) is [2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = 2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropane. Carboxylate. This ester compound can be produced, for example, by the method described in JP-A No. 2001-11022.

  The ester compound of the formula (1) includes isomers derived from two asymmetric carbon atoms existing on the cyclopropane ring (R-form, S-form), and isomers derived from the three-dimensional structure defined by the cyclopropane ring. (Cis isomer, trans isomer) exist, but in the present invention, those containing active isomers in an arbitrary ratio can be used. The ratio of isomers is a value determined by, for example, the stereoselectivity of the reaction used when producing the ester compound of formula (1). Moreover, it is good also as mixing and using each isomer by arbitrary ratios.

As the form of the ester compound of the formula (1), for example,
[2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate,
[2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate,
[2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -cis-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate, etc. Is mentioned. Especially, it is preferable that the form of the ester compound of Formula (1) is a (1R) -trans body.

  In the ester compound of formula (1), the carbon to which the carboxyl group in the cyclopropane ring is bonded is the 1st position, and the carbon to which the substituent having a carbon-carbon double bond is bonded is the 3rd position.

  Such an ester compound is contained in the composition in an amount of about 0.1 to 10% by weight, preferably 0.2 to 8% by weight, more preferably 1.0 to 6% by weight. Present in proportion.

(Dispersion medium)
The composition of this embodiment contains the dispersion medium which melt | dissolves or disperse | distributes the ester compound of Formula (1). The dispersion medium is a solvent or solvent mixture, for example, an organic solvent or an organic solvent mixture. The solvent may be a polar solvent or a nonpolar solvent, but usually a polar solvent is preferably used.

  In this embodiment, in order to disperse the composition effectively, a stable spray of small droplets is generated by an electrostatic spraying device as will be described later. Therefore, it is desirable that the composition has the following properties. As the properties to be possessed by the composition, firstly, the compound of the formula (1) is uniformly dispersed or dissolved in the composition, and secondly, the composition has an appropriate electric resistance value, viscosity and surface. It is characterized by having a tension, and thirdly, the toxicity of the dispersion medium is low.

  The dispersion medium of the composition is suitably a polyol having one or more hydroxyl groups in one molecule (for example, ethyl alcohol, propylene glycol, triethylene glycol, glycerin, polyethylene glycol, polypropylene glycol, etc.), glycol ether (for example, And those containing a polyol ether having one or more hydroxyl groups in one molecule such as glycol methyl ether). A particularly suitable polyol ether is dipropylene glycol methyl ether. Other particularly suitable polyol ethers include propylene glycol methyl ether and tripropylene glycol methyl ether.

  Additional dispersion media include 1-methoxy-2-propanol acetate, 1-butoxy-2-propanol and 1-propoxy-2-acetoxypropane, and oxybis (methoxy) propane.

  Such a dispersion medium is preferably present in the composition in a proportion of 65 to 99% by mass, more preferably 70 to 95% by mass.

  The dispersion medium used in the composition of the present embodiment may be a physical property adjusting component. In the composition of the present embodiment, the physical properties of the composition of the present embodiment can be adjusted by appropriately using physical property adjusting components. A plurality of physical property adjusting components may be used in combination.

  Physical property adjusting components include ester solvents, petroleum (paraffinic, aromatic, naphthenic) solvents, (eg Isopar L (registered trademark)), silicone oils (eg decamethyltetrasiloxane, decamethylcyclopentasiloxane) , Dodecamethylcyclohexasiloxane and mixtures thereof), polyethylene glycol, water, and dilute aqueous solutions of electrolytes (eg, dilute solutions of sodium bicarbonate, sodium acetate, sodium chloride, ascorbic acid, citric acid or acetic acid).

  For example, it may be possible to reduce the surface tension of the composition by adding isoparaffin such as Isopar L. The composition may contain, for example, 0% by mass to 9.99% by mass of isoparaffin.

  In addition, the viscosity of the composition may be adjusted by adding a polyethylene glycol having a relatively low average molecular weight such as polyethylene glycol having a mass average molecular weight of more than 200 Da, for example, 200 Da or more and 700 Da or less.

  Furthermore, it is possible to adjust the electrical resistance value of the composition by adding an electrolyte. Suitable electrolytes are known in the art and include, for example, dilute aqueous solutions of alkane salts, including dilute solutions of sodium acetate (eg, 0.4 wt% sodium acetate solution).

  Furthermore, examples of the dispersion medium that can affect the electric resistance value include surfactants (nonionic surfactants, amphoteric surfactants, anionic surfactants, and cationic surfactants).

  Surfactants that can be contained in the composition of the present invention include nonionic surfactants such as sorbitan stearate and sorbitan oleate as sorbitan fatty acid esters, and glyceryl stearate and glyceryl isostearate as glycerin fatty acid esters. Glyceryl oleate, polyglyceryl stearate, polyglyceryl isostearate, polyglyceryl oleate, etc., and polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether , Polyoxyethylene styryl phenyl ether, and the like, and coconut oil fatty acid poly as polyoxyethylene sorbitan fatty acid ester. Xylethylene sorbitan, polyoxyethylene sorbitan oleate, polyoxyethylene sorbitan stearate, and the like, polyoxyethylene sorbite fatty acid ester includes tetraoleic acid polyoxyethylene sorbitan, and others include polyoxyethylene hydrogenated castor oil And alkylphenol polyglycol ether.

  Examples of amphoteric surfactants include lauryl betaine and stearyl betaine as betaines, imidazoline derivatives as di-sodium N-lauryl-p-iminodipropionate, and the like as lecithin.

  Examples of the anionic surfactant include sodium lauryl sulfate and triethanolamine lauryl sulfate as the alkyl sulfate, and polyoxyethylene lauryl ether sulfate sodium and polyoxyethylene lauryl ether sulfate triethanol as the polyoxyethylene alkyl ether sulfate. Examples include amines and the like, sodium dodecylbenzenesulfonate as the alkylbenzene sulfonate, and dioxyoxyethylene lauryl ether sodium phosphate and dipolyoxyethylene oleyl ether sodium phosphate as the polyoxyethylene alkyl ether phosphate. Is mentioned.

  Examples of the cationic surfactant include cetyltrimethylammonium chloride and distearyldimethylammonium chloride as alkylammonium salts.

  Furthermore, the composition of the present embodiment includes, as a dispersion medium capable of affecting the electrical resistance value, other quaternary amine salts different from those described above, preservatives, chlorhexidine salts containing chlorhexidine digluconate, and Other air cleaning agents including those disclosed herein can also be mixed.

  As a method for measuring physical properties of the composition, the following method and apparatus are used.

  First, the electrical resistance value of the composition can be measured with a specific resistance meter (manufactured by Horiba Ltd., model number pH / ION / COND METER F-55) using a liquid resistance cell. The measured value is obtained as a value in MΩ · m units.

  The surface tension of the composition can be measured using a contact angle / surface tension meter (model number DM-501, manufactured by Kyowa Interface Science Co., Ltd.) whose measurement principle is the pendant drop method. The measured value is obtained as a value in mN / m.

  Furthermore, the viscosity of the composition can be measured using a rotational viscometer (manufactured by Toki Sangyo Co., Ltd., model number RB85L). The measured value is obtained as a value in units of mPa · s. As a measuring method, a method based on “JIS V8803 liquid viscosity-measuring method” can be used.

  Then, the diameter of the droplets of the composition after spraying is determined by using a spatial particle size distribution measuring device Aero Particle Sizer Model 3321 (manufactured by TSI Instruments) or Scanning Mobility Particle Sizer Model 3936 (manufactured by TSI Instruments). It can be measured as “diameter”. The measured value is obtained as a value in nm or μm. The average particle diameter is a value measured using Model 3936 for a range of 100 nm to 500 nm (that is, 0.5 μm), and for a range of greater than 0.5 μm to 10 μm, Model 3321 is used. The measured value was adopted.

The electrical resistance value of the composition can be suitably adjusted to be in the range of 1 × 10 ³ Ωm to 1 × 10 ⁶ Ωm at 20 ° C. In addition, the viscosity of the composition can be appropriately adjusted to be in the range of 1 mPa · s to 10 mPa · s at 20 ° C. Furthermore, the surface tension of the composition can be suitably adjusted to be in the range of 20 mN / m to 40 mN / m at 20 ° C. By setting each physical property value within the above-described range, the composition can be sprayed well using an electrostatic spraying device to be described later.

  A fragrance | flavor or an air purifying chemical | medical agent can further be added to the composition used in this invention as another component.

  Examples of the fragrances include essential oils and other fragrance oils. And as said fragrance | flavor, you may use only a part of all the fractions (component oil) contained in these oils.

  More preferable examples of the fragrances include, specifically, oil of Melaleuca, tea tree oil such as terpinen-4-ol type; Examples include a fraction of dog mint oil such as a fraction containing nepetalactone; a time oil such as oil of Thymus vulgaris; a fraction of time oil such as a fraction containing thymol, and the like.

  In addition, a fragrance such as fragrance oil is often a mixture containing a plurality of types of compounds having different skeleton chain lengths or a mixture containing a plurality of types of stereoisomers. Also good.

  Among the above, the perfume is preferably one or more component oils selected from the group consisting of tea tree oil, dog mint oil and thyme oil.

  When the composition of this invention contains fragrance oil, it is preferable that content of the fragrance oil in this composition is 5 to 35 mass%.

  Moreover, as a fragrance oil, what has a vapor pressure of 270 Pa or less at 20 degreeC is suitable.

  Specific examples of the air cleaning agent include an active air cleaner component, an active antibacterial component, an active antifungal component, and an active antiallergic component.

  Here, the “active air cleaner component” is a substance having a deodorizing activity.

  An “active antibacterial component” is a substance having an activity of inhibiting bacterial growth.

  An “active antifungal component” is a substance having an activity of inhibiting fungal growth.

  An “active antiallergic component” is a substance that suppresses the activity of an allergen substance.

  As such an air cleaning agent, active air cleaner component, active antibacterial component, active antifungal component, among the functions exemplified as active antiallergic component, a substance that exhibits a single function may be used, A substance expected to express a plurality of functions may be used. As such a substance expected to exhibit a plurality of functions, preferred compounds as an air cleaning agent are, more specifically, polyhexamethylene biguanide polymer, polyhexamethylguanide polymer, alkyl Dimethylbenzylammonium chloride, octyldecyldimethylammonium chloride, chlorhexidine, chlorhexidine digluconate, benzalkonium chloride, sodium hypochlorite, 2-phenylphenol, polyethylene glycol 300, 2-benzyl-4-chlorophenol, 2- Phenoxyethanol, glutaraldehyde, phthalaldehyde, chloroxylenol, trichlorophenol, phenol, silver salt (especially water-soluble silver salt), hexachlorophene, peracetic acid, lactic acid, formic acid, potassium permanganate, Okishimono potassium sulfate can be exemplified.

  When the composition of the present invention contains an air cleaning agent, the content of the air cleaning agent in the composition is preferably 0.05% by mass or more and 20% by mass or less, and 0.1% by mass or more. It is more preferably 17% by mass or less, and particularly preferably 0.1% by mass or more and 15% by mass or less.

  Examples of the active antibacterial component include triclosan, trichlorocarbanilide, isopropylmethylphenol, N- (dichlorofluoromethylthio) -phthalamide, N ′-(dichlorofluoromethylthio) N, N′-dimethyl-N′-phenyl-sulfamide, Polyoctyl polyaminoethylglycine, thiabendazole, chlorine dioxide, 2-bromo-2-nitroethanol, 2-bromo-2-nitropropane-1,3-diol, 2 bromo-2-nitropropanol, 1-bromo-1 -Nitropropanol, 1,4-dibromo-1,4-dinitrobutanediol-2,3-cetylpyridinium, 1-bromo-1-nitro-2-methylpropanol-2-cetylpyridinium and cetylpyridinium chloride, benzethonium chloride, Acrinol, Bidon'yodo, mercurochrome, chloramphenicol, fradiomycin sulfate, may further include gentamicin sulfate, hydrochloric oxytetracycline, sulfate polymyxin B, trichomycin, griseofulvin.

  Examples of the active antifungal component include benzoic acid and salts thereof, sorbic acid and salts thereof, paraoxybenzoic acid esters, sodium dehydroacetate, propionic acid, polylysine, thiapendazole; linalool, geraniol, nerol, citronellol, α-terpineol Terpene alcohols such as terpinen-4-ol and isopulegol; 2,4-dimethyl-3-cyclohexene-1-methanol, 4-isopropylcyclohexanol, 4-isopropylcyclohexanemethanol, 1- (4-isopropylcyclohexyl) -ethanol Alicyclic alcohol having 7 to 15 carbon atoms such as 2,2-dimethyl-3- (3-methylphenyl) -propanol; benzyl alcohol, phenylethyl alcohol, phenylpropyl alcohol, carbac Lumpur, can further include an arylalkyl alcohol or alkylaryl alcohol having 7 to 15 carbon atoms of eugenol and the like.

  Examples of the active antiallergic component further include hydroxyapatite, epicatechin, epigallocatechin, epicatechin gallate, epigallocatechin gallate, gallic acid, and ester compounds of gallic acid and an alcohol having 1 to 4 carbon atoms. it can.

  Active air cleaner components for deodorization and the like include polyphenols such as tannins, flavonoids (chalcones, flavanones, flavanols, flavones, flavonols, isoflavones), cyclodextrins, lauryl methacrylate, geranyl chloride, 4-hydroxy-6- Methyl-3- (4-methylpentanoyl) -2-pyrone, formalin, glyoxal, sodium bisulfite, sodium sulfite, dihydroxy-acetone, 3,5,5-trimethylhexanol, β-ethoxypropionaldehyde, glutaraldehyde, Methacrylic acid ester, maleic acid ester, maleic acid monoamide, maleic acid imide, fumaric acid ester, β-acylacrylic acid and its salts, citronellyl senesioate, 1,3-pentadiene-1- Carboxylic acid alkyl ester, pinane hydroperoxide, p-cymene peroxide, 1,2-propylene oxide, 1,2-butylene oxide, glycidyl ether, octaacetyl saccharose, Fe (III) -octacarboxyphthalocyanine, Fe (III) -Tetracarboxyphthalocyanine, 5-methyl-2-isopropyl-2-hexenal, p-butoxyphenol, catechol, hydroquinone, 4-methylcatechol, 1,2,4-trihydroxybenzene, 3-methylcatechol, 3-methoxycatechol , Carnosol, rosmanol, brazirin, hematoxylin, shikonin, myricetin, baicalein, baicalin, citral, vanillin, coumarin.

  Examples of the composition according to this embodiment include the following compositions.

  Moreover, when the composition of this embodiment contains the other containing component mentioned above, it is comprised by the following composition ratios.

  First, when the fragrance | flavor which is a fragrance | flavor component is included as another content component, the composition which concerns on this embodiment is comprised by the composition ratio shown in the following table 2.

  Moreover, when the compound for disinfection is included as other components, the composition according to the present embodiment is configured with the composition ratio shown in Table 3 below.

(Harmful arthropod)
Examples of subjects to be controlled using the composition of the present embodiment include arthropods such as insects and mites, and particularly harmful arthropods such as harmful insects and harmful mites. Specific examples include the following.

  Lepidoptera: Common moth, Japanese moth, Japanese tiger moth, Japanese moth, Japanese moth, Japanese moth, White moth, White moth Agrotis spp., Helicoverpa spp., Heliothis spp., Kona, Ichimonseiseri, Iga, Koiga, etc.

Diptera: Culex mosquitoes, Culex mosquitoes, etc., Aedes aegypti, Aedes albopictus, etc. Sand flies, fruit flies, leaf flies, fruit flies, fly flies, fly flies, fly flies, fly flies, sand flies, venoms, etc.

  Hymenoptera: Ants such as Black-tailed ants, White-faced whales, White-faced whales, White-tailed ants, Black-tailed ants, Black-backed ants, Green-backed ants, Black-tailed ants, Rugliari, Ami-meari, Giant ants, Argentine ants, etc. , Wasps such as core wasps, Yamato wasps, giant hornets, killer whales, hornets, wasps, hornets, hornets, wasps such as wasps, wasps such as wasps, wasps .

  Lepidoptera: Dog flea, cat flea, human flea, etc.

  Lice: human lice, white lice, head lice, body lice etc.

  Chattera moth: Chattera

  Isoptera: Yamato termite, Japanese termite, Eastern subterranian termite, Western subterranian termite, Dark Southern subterranian termite, Aridland subterranian termite, Desert subterranian termite and other dry wood termites such as American Kansai termite , Dumpwood termites such as Nevada dumpwood termites.

  Hemiptera: Japanese planthoppers such as Japanese brown planthopper, yellow planthopper, white-tailed planthopper, leafhoppers such as black leafhopper, white-winged leafhopper, aphids, blue-headed beetle, white-headed beetle, white-winged beetle, white-winged beetle, spring-winged beetle Stink bugs such as red-bellied turtles and red-bellied beetles, whiteflyes, scale insects, bed bugs such as bed bugs, firebirds, and bugs.

  Coleoptera: Corn rootworms such as corn worm, corn worm, western corn root worm, southern corn root worm; Ganoderma beetles, euglena, etc. , Aobaarigatanekanekushi etc.

  Total scale: Southern thrips, Thrips thrips, Hana thrips, etc.

  Species: Kera, grasshoppers, crickets, etc.

Tick: Leopard mites, such as Scarlet mite, Yake leopard mite, Scarlet mites, such as Scarlet mite, Scarlet mite, Mite, Mite, Mite, Mite, Mite, Mite, Mite Spider mites such as spider mites, spider mites such as spider mites, spider mites, spider mites such as spider mites, spider mites such as spider mites; spider mites such as spider mites; Japanese rubber moths, brackish beetles; gastropods such as Chaukoura slugs, yellow crocodiles, etc .;
The method for controlling harmful arthropods using the above-described composition is performed by electrostatically spraying the above-described composition onto the harmful arthropods to be treated or the habitat of the harmful arthropods. Electrostatic spraying is performed using an electrostatic spraying device.

  An electrostatic spraying device allows a liquid to flow inside a tubular spray electrode and applies a voltage between the spray electrode and a reference electrode (discharge electrode) provided in the vicinity of the spray electrode. Electrostatic force is applied to the fluid that flows. In addition, although the relative position of a spray electrode and a reference electrode is not specifically limited, For example, it is also possible to provide a reference electrode so that a spray electrode may be opposed. Then, since the electrostatic repulsive force is generated in the liquid in the spray electrode, the liquid is miniaturized. At the time of spraying, the liquid exhibits, for example, a cone jet mode at the tip of the spray electrode. This type of spraying is well known in the art as published by Geoffrey Taylor, Proceedings of the Royal Society, 1964, p383-397. Further, the voltage applied between the spray electrode and the discharge electrode is preferably 1 kV or more and 30 kV or less.

  An example of a suitable electrostatic spray device is described in EP 1399265 and is illustrated by reference to FIG.

  In the electrostatic spraying device shown in the figure, the cylindrical spray electrode 1 is accommodated in a spray recess 2 provided on the side surface (spray discharge surface 5) of the electrostatic spraying device, and is opposed to the spray electrode 1. Similarly, the discharge electrode 3 is accommodated in a discharge recess 4 provided on the side surface (spray discharge surface 5) of the main body of the electrostatic spraying device. From the spray electrode 1, the charged composition is sprayed to form atomized particles of the composition. In the discharge electrode 3, a voltage opposite to that of the atomized particles of the charged composition is applied, and the flow direction of the atomized particles is deflected by attracting the atomized atomized particles. For example, the spray electrode 1 comprises a 27 gauge metal or conductive plastic capillary and the discharge electrode 3 comprises a stainless steel sharp pin with a diameter of 0.6 mm.

  The spray electrode 1 and the discharge electrode 3 are electrically connected to the drive circuit 10 through sheath metal tubes 6 and 7, and one electrode is a positive electrode and the other is a negative electrode (for example, the spray electrode 1 is a positive electrode and the discharge electrode 3 Can be applied to the negative electrode).

  The spray discharge surface 5 is formed using a dielectric material. In the electrostatic spraying device of this embodiment, the spray discharge surface 5 can be formed using, for example, polypropylene.

  Further, the spray discharge surface 5 is provided with a spray recess 2 for storing the spray electrode 1 and a discharge recess 4 for storing the discharge electrode 3, arranged in the vertical direction (gravity direction). In the electrostatic spraying device of the present embodiment, the spray discharge surface 5 is a flat surface at a place other than the place where the spray well 2 and the discharge well 4 are provided.

  However, the spray discharge surface 5 is not limited to this, and the mist-like composition ejected from the spray electrode 1 is sufficiently charged, and the charged mist-like composition is attracted and deflected by the discharge electrode 3. As long as other dielectric materials can be used, it can also be a curved surface.

  The composition to be sprayed using the electrostatic spraying device is held in the liquid storage tank 8, and is supplied to the spray electrode 1 through a pump and piping (not shown). Further, the liquid storage tank 8 is connected to the outside through an air introduction small hole 9 so that the inside does not become a negative pressure as the composition is supplied.

  Further, when the spraying of the composition is repeated using the electrostatic spraying device, the composition in the liquid storage tank 8 is consumed. In this case, in order to continue using the same electrostatic spraying device, the following mode is used. Either of these can be employed.

  First, as a first aspect, the electrostatic spraying device may be configured such that a composition can be added to the same liquid storage tank 8. In this case, the liquid storage tank 8 may be detachably provided from the electrostatic spraying device, and the composition may be reattached to the electrostatic spraying device after adding the composition to the removed liquid storage tank 8. In addition, the liquid storage tank 8 may be fixed to the electrostatic spraying device, and an additional port that allows the composition to be added to the liquid storage tank 8 may be provided separately.

  Moreover, as a 2nd aspect, the electrostatic spraying apparatus is provided so that the liquid storage tank 8 can be replaced | exchanged, and a composition can be added by replacing | exchanging with the separate liquid storage tank with which the composition was hold | maintained. It is good also as comprising. For example, in an electrostatic spraying device, a liquid storage tank in which the composition is held may be configured as a cartridge-type replacement member and may be replaced as appropriate. In that case, as a specific configuration of the cartridge, the one disclosed in Japanese translations of PCT publication No. 2008-508150 can be given as an example.

  Of course, when the composition held in the liquid storage tank 8 is used up, it may be disabled (that is, the electrostatic spraying device has a disposable configuration).

  According to such an electrostatic spraying device, the composition is first supplied from the storage tank 8 into the cylindrical spray electrode 1, and a high voltage is applied to the composition at the spray electrode 1. As described above, the composition has a predetermined range of electrical resistance and is charged, and is sprayed from the tip of the spray electrode 1 by electrostatic force. Since the sprayed composition is charged with the electric charge applied to the spray electrode 1, it is repelled by the Coulomb force and sprayed into the space while being miniaturized. At this time, as described above, since the composition has a predetermined range of viscosity and a predetermined range of surface tension, it is finely jetted and refined.

  For example, when this device is energized by the drive circuit 10 due to the insertion of a battery or the action of a built-in electronic timer, the liquid in the reservoir 8 is very fine so that it quickly evaporates according to its vapor pressure and ambient conditions in the vicinity of the device. In this manner, the liquid is discharged from the spray electrode 1. The discharge amount can be determined by the effective amount of the ester compound for the target harmful arthropod.

  The electrostatic spray device may be adapted to supply the composition according to the invention from time to time (eg in a constant duty cycle) or continuously. The application rate may be, for example, up to 5 g of composition per day, or up to 3 g, but is not limited to such levels.

  In such electrostatic spray devices, low volatile composition components may deposit on or around the spray electrode, which is a general limitation of electrostatic spray devices. When component deposition occurs, the spray electrode can be partially clogged or occluded, resulting in inefficient or incapable electrostatic spraying of the composition. This can occur especially when the spray electrode is a capillary tube.

  However, when the composition of the present embodiment is used as a liquid to be sprayed by an electrostatic spraying device, a relatively high concentration of the ester compound (for example, 1.2% of the ester compound is used for 14 days in a duty cycle sprayed for 25 seconds for 2 minutes). When spraying at (mass%), little or no deposition occurred on or around the spray electrode and stable spraying was possible.

  Since the composition sprayed by electrostatic spraying is observed in the form of a mist, the presence or absence of actual spraying is qualitatively determined by visually inspecting the vicinity of the spray electrode (specifically, spray electrode 1 in FIG. 1). Judgment can be made.

  Quantification of the composition sprayed by electrostatic spraying is carried out by collecting mist particles in the vicinity of the electrostatic spraying device and using a method (for example, HPLC or spectrophotometry) suitable for the type of ester compound used. Can be achieved by quantitative determination.

  It can also be done by monitoring the mass change of the entire electrostatic spraying device or the liquid storage tank (specifically, the liquid storage tank 8 in FIG. 1).

  The effect of the control treatment using such an electrostatic spraying device is made possible through a series of means known to those skilled in the art. For example, 50% of the pest population can be quantitatively analyzed as the time to knockdown (KD50) or kill (KT50) in a test chamber of known dimensions (eg, a Peet-Grady chamber).

  By doing in this way, the composition which is solid at normal temperature can be electrostatically sprayed to harmful arthropods or the habitats of harmful arthropods. Therefore, the following effects can be obtained.

  That is, according to the control method of the present embodiment, the composition containing the ester compound represented by the formula (1) is sprayed by electrostatic spraying to be heated for spraying the composition (for example, smoke) No spraying (for example, gas pressure or mechanical pressure) is required, and spraying of the ester compound can be started and stopped immediately. Therefore, it becomes easy to control the spray amount of the ester compound, and waste of the ester compound can be suppressed. Therefore, according to the control method of the present embodiment, the harmful arthropod can be effectively controlled.

  Moreover, in the control method of this embodiment, since the electrical resistance value, the viscosity, and the surface tension of the composition containing the ester compound represented by the formula (1) are in a predetermined range, electrostatic spraying is performed. It has suitable physical properties. Therefore, the composition can be reliably sprayed and harmful arthropods can be treated.

  Moreover, in the control method of this embodiment, a composition can be reliably sprayed by using the apparatus suitable for electrostatic spraying.

  Moreover, according to the composition of the present embodiment, the composition containing the ester compound represented by the formula (1) that is solid under standard atmospheric pressure has values of electrical resistance, viscosity, and surface tension within a predetermined range. Therefore, it is possible to control a wide range of harmful arthropods and to make the composition suitable for electrostatic spraying.

  Moreover, in the electrostatic spraying apparatus of this embodiment, heating (for example, smoke) and pressurization (for example, gas pressure or mechanical pressure) are not required for spraying, and the composition can be easily sprayed. . For this reason, this apparatus can easily control the spray amount, and therefore can suppress the waste of the ester compound, which is an active ingredient, and can effectively perform harmful arthropod control treatment.

  The present invention can also be configured as follows.

In the control method according to the present invention, the electrical resistance value of the composition is 1 × 10 ³ Ωm or more and 1 × 10 ⁶ Ωm or less at 20 ° C., and the viscosity of the composition is 1 mPa · s or more and 10 mPa · s at 20 ° C. In addition, the surface tension of the composition is preferably 20 mN / m or more and 40 mN / m or less at 20 ° C.

In the control method according to the present invention, the composition preferably contains the following (i) and (ii).
(I) 0.1 mass% or more and 10 mass% or less of the ester compound,
(Ii) A polyol having one or more hydroxyl groups in one molecule, a polyol ether having one or more hydroxyl groups in one molecule, 1-methoxy-2-propanol acetate, 1-butoxy-2-propanol, 1-propoxy- 90% by mass or more and 99% by mass or less of a dispersion medium containing at least one compound selected from the group consisting of 2-acetoxypropane and oxybis (methoxy) propane and a physical property adjusting component (however, the physical property adjusting component is 0.5% to 25% by mass relative to the total amount of the composition).

  In the control method according to the present invention, the electrostatic spray is performed by supplying the composition into a cylindrical spray electrode and between the spray electrode and the discharge electrode paired with the spray electrode. Preferably, the method includes applying a voltage such that the composition becomes liquid particles and spraying the composition from the spray electrode.

  In the present specification, “liquid particles” mean particles formed of liquid, and the shape and size thereof are not particularly limited. Examples of the shape include a spherical shape, but are not limited to the shape. Although the size is not particularly limited, for example, in the case of spherical liquid particles, for example, the diameter may be 1 nm to 1000 μm, but is not limited to the size.

The composition according to the present invention preferably contains the following (i) and (ii).
(I) 0.1 mass% or more and 10 mass% or less of the ester compound,
(Ii) A polyol having one or more hydroxyl groups in one molecule, a polyol ether having one or more hydroxyl groups in one molecule, 1-methoxy-2-propanol acetate, 1-butoxy-2-propanol, 1-propoxy- 90% by mass or more and 99% by mass or less of a dispersion medium containing at least one compound selected from the group consisting of 2-acetoxypropane and oxybis (methoxy) propane and a physical property adjusting component (however, the physical property adjusting component is 0.5% to 25% by mass relative to the total amount of the composition).

  The electrostatic spray device of the present invention includes a liquid storage tank in which the composition of the present invention is held, a spray electrode to which the composition is supplied from the liquid storage tank, and a discharge electrode disposed in the vicinity of the spray electrode. The composition is electrostatically sprayed from the spray electrode by applying a voltage between the spray electrode and the discharge electrode.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

  In this example, the knockdown rate of flying insects (Culex pipiens pallens) in the test chamber (1.8 m × 1.8 m × 1.8 m) was compared. In this example, 50 adult mosquitoes were released into test chambers that had been controlled by each method, the number of insects knocked down 10 minutes later was examined, and the knockdown rate was measured.

Example 1
The composition of Example 1 was prepared according to the following formulation.

  In this example, as the ester compound of the formula (1), [2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -trans-2,2-dimethyl-3- (2-Methyl-1-propenyl) cyclopropanecarboxylate was used.

  The composition shown in Table 4 above was fed into a reservoir of an electrostatic spray device (Cleanaer model, Atrium Innovation Ltd.) disclosed in EP 1399265. An electrostatic spraying device was installed in the test chamber and sprayed continuously for the first 3 minutes immediately after switching on and then interrupted for 1 minute. Thereafter, the apparatus was operated at a cycle of spraying for 25 seconds every 2 minutes to spray 25 mg of the composition into the chamber, and then the apparatus was stopped to control the inside of the test chamber.

  Thereafter, 50 female adult mosquitoes were released into the test chamber. The number of insects knocked down 10 minutes after the release of the mosquito was investigated to determine the knockdown rate.

(Comparative Example 1)
To 0.5 g of a base of insect-repellent incense stick (Union Insecticide Co., Inc.), [2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -trans-2, 0.3 ml of an acetone solution of 2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate was impregnated. Here, the base material was uniformly impregnated so that the ester compound contained 0.01% by mass.

  The produced base material was air-dried to obtain an insect incense stick. The insect incense stick was set on a holder arranged in the center of the bottom of the test chamber, and one end of the insect catch incense stick was ignited to complete burning of the incense stick, thereby controlling the inside of the test chamber.

  Thereafter, 50 female adult mosquitoes were released into the test chamber. The number of insects knocked down 10 minutes after releasing the mosquito was investigated, and the knockdown rate was determined.

  The results of Example 1 and Comparative Example 1 are shown in Table 5.

As a result of measurement, it was found that Example 1 showed a higher knockdown rate than Comparative Example 1, and could be controlled with high efficiency. This confirmed the usefulness of the present invention.
(Example 2)
The knockdown rate was determined in the same manner as in Example 1 except that the composition shown in Table 6 below was used.

(Comparative Example 2)
[2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl] methyl = (1R) -trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate 0 .333 parts, (2-methoxymethylethoxy) propanol (Dowanol DPM (registered trademark)) 59.677 parts are put into an aerosol can, a valve part is attached to the can, and propellant (liquefied petroleum gas) 40 parts through the valve part To obtain an aerosol containing 100 parts (hereinafter referred to as Comparative Example 3).

  In Comparative Example 2, 750 mg was sprayed into the test chamber.

  Subsequently, 50 female squids were released into the test chamber. The number of insects knocked down 2 minutes after the release of the mosquito was investigated to determine the knockdown rate.

  The results of Example 2 and Comparative Example 2 are shown in Table 7.

  As a result of measurement, it was found that Example 2 showed a higher knockdown rate than Comparative Example 2 and could be controlled with high efficiency. This confirmed the usefulness of the present invention.

  By using the control method, composition and electrostatic spraying device of the present invention, it becomes possible to effectively control harmful arthropods without requiring heating or pressurization. Therefore, the present invention can be used for controlling harmful arthropods indoors such as in homes and factories, or outdoors such as farms and parks.

DESCRIPTION OF SYMBOLS 1 Spray electrode 2 Spray hollow 3 Discharge electrode 4 Discharge hollow 5 Spray discharge | emission surface 6 Seed metal pipe 7 Seed metal pipe 8 Storage tank 9 Air introduction small hole 10 Drive circuit

Claims (7)

Formula (1)

A noxious nodule characterized by electrostatically spraying a composition containing the ester compound represented by the above formula to an arthropod pest or a habitat of the noxious arthropod in an amount effective for controlling the noxious arthropod. How to control paw animals. The electrical resistance value of the composition is 1 × 10 ³ Ωm to 1 × 10 ⁶ Ωm at 20 ° C., and the viscosity of the composition is 1 mPa · s to 10 mPa · s at 20 ° C. The method for controlling harmful arthropods according to claim 1, wherein the surface tension is 20 mN / m or more and 40 mN / m or less at 20 ° C. The method for controlling harmful arthropods according to claim 1, wherein the composition contains the following (i) and (ii).
(I) 0.1 mass% or more and 10 mass% or less of the ester compound,
(Ii) A polyol having one or more hydroxyl groups in one molecule, a polyol ether having one or more hydroxyl groups in one molecule, 1-methoxy-2-propanol acetate, 1-butoxy-2-propanol, 1-propoxy- 90% by mass or more and 99% by mass or less of a dispersion medium containing at least one compound selected from the group consisting of 2-acetoxypropane and oxybis (methoxy) propane and a physical property adjusting component (however, the physical property adjusting component is 0.5% to 25% by mass with respect to the total amount of the composition) The electrostatic spraying supplies the composition to the inside of a cylindrical spray electrode;
Applying a voltage such that the composition becomes liquid particles between the spray electrode and a discharge electrode paired with the spray electrode;
The method for controlling harmful arthropods according to claim 1, comprising spraying the composition from the spray electrode. Formula (1)

And an electrical resistance value of 1 × 10 ³ Ωm to 1 × 10 ⁶ Ωm at 20 ° C., a viscosity of 1 mPa · s to 10 mPa · s at 20 ° C., and a surface tension of A composition characterized by being 20 mN / m or more and 40 mN / m or less at 20 ° C. 6. The composition according to claim 5, comprising the following (i) and (ii):
(I) 0.1 mass% or more and 10 mass% or less of the ester compound,
(Ii) A polyol having one or more hydroxyl groups in one molecule, a polyol ether having one or more hydroxyl groups in one molecule, 1-methoxy-2-propanol acetate, 1-butoxy-2-propanol, 1-propoxy- 90% by mass or more and 99% by mass or less of a dispersion medium containing at least one compound selected from the group consisting of 2-acetoxypropane and oxybis (methoxy) propane and a physical property adjusting component (however, the physical property adjusting component is 0.5% to 25% by mass with respect to the total amount of the composition) A liquid storage tank in which the composition according to claim 5 is retained;
A spray electrode from which the composition is supplied from the reservoir;
A discharge electrode disposed in the vicinity of the spray electrode,
An electrostatic spraying apparatus characterized in that the composition is electrostatically sprayed from the spray electrode by applying a voltage between the spray electrode and the discharge electrode.

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