Harmful-arthropod-exterminating composition

Abstract

Provided is a harmful-arthropod-exterminating composition with which a high lethal effect on harmful arthropods is achieved in a shorter time.　Provided are: [1] a harmful-arthropod-exterminating composition comprising (A1) at least one selected from the group consisting of non-ionic surfactants (a11) and oily components (a12) satisfying prescribed requirements, and (B1) a surfactant that contains an ionic surfactant (b1), the mass ratio [(B1) / (A1)] of the component (B1) to the component (A1) being 4-30; and [2] a harmful-arthropod-exterminating composition comprising (A2) one or more selected from the group consisting of non-ionic surfactants (a21) and oily components (a22) satisfying prescribed requirements, (B2) a non-ionic surfactant other than the component (a21), and water, the mass ratio [(B2) / (A2)] of the component (B2) to the component (A2) being 4-30, the total amount of the component (A2) and the component (B2) contained being 0.15 mass% or greater, and the component (A2) being dissolved.

Description

Arthropod pest control composition

[0001] The present invention relates to an arthropod pest control composition.

[0002] Among arthropods such as insects, various synthetic insecticides such as pyrethroids, organophosphate insecticides, and carbamate insecticides are often used to exterminate sanitary pests such as mosquitoes and mites that transmit various pathogens to humans and livestock, and agricultural and horticultural pests such as thrips, aphids, and scale insects that ravage crops in fields or transmit viruses that become pathogens of crops.

[0003] On the other hand, pesticides for exterminating pests without relying on these synthetic insecticides are known. For example, Patent Document 1 discloses that a transparent pesticide having thixotropy, which contains a specific amount of a pest-controlling component and a hydrophobically modified polyether urethane in an aqueous solvent, is easy to spray, can adhere to wall surfaces and the body surfaces of pests for a long time, does not unnecessarily soil the application site, and has excellent spray properties. Patent Document 2 discloses that a bee-trapping agent containing a surfactant with a penetration power of 2000 seconds or less as an active ingredient can shorten the time until the death of captured bees.

[0004] (Patent Document 1) JP 2013-234153 A (Patent Document 2) JP 2020-33343 A

[0005] The present invention relates to the following: [1] A pest arthropod-controlling composition containing the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of a nonionic surfactant (a11) and an oily component (a12), the solubility X in water at 25°C being 5 g / kg or less, and the solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C being Y / X being 1.2 or more, and (B1) a surfactant including an ionic surfactant (b1), the mass ratio of component (B1) to component (A1) in the composition [(B1) / (A1)] being 4 or more and 30 or less. [2] A pest arthropod control composition comprising the following components (A2) and (B2): (A2) one or more selected from the group consisting of a nonionic surfactant (a21) and an oily component (a22), the solubility X in water at 25°C of 5 g / kg or less, and (B2) a nonionic surfactant other than component (a21), wherein the composition further contains water, the mass ratio of component (B2) to component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less, the total content of components (A2) and (B2) in the composition is 0.15 mass% or more, and component (A2) is in a dissolved state in the composition. [3] A method for controlling pests, the method comprising the step of contacting the composition according to [1] or [2] with pests. [4] A composition containing the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of nonionic surfactants (a11) and oily components (a12), having a solubility X in water at 25°C of 5 g / kg or less, and having a solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C of Y / X of 1.2 or more, where Yg / kg is the solubility Y / X, and (B1) a surfactant containing an ionic surfactant (b1), wherein the mass ratio of component (B1) to component (A1) in the composition [(B1) / (A1)] is 4 or more and 30 or less, and wherein the mass ratio of component (B1) to component (A1) in the composition ...[5] A composition comprising the following components (A2) and (B2): (A2) one or more selected from the group consisting of nonionic surfactants (a21) and oily components (a22), each having a solubility X in water at 25°C of 5 g / kg or less; and (B2) a nonionic surfactant other than component (a21), wherein the composition further contains water; the mass ratio of component (B2) to component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less; the total content of components (A2) and (B2) in the composition is 0.15 mass% or more; and component (A2) is dissolved in the composition. Use of the composition as a pest arthropod control composition.

[0006] 1 is a schematic diagram showing a method for evaluating the knockdown rate of mosquitoes in the examples. 2 is an image of the internal trachea at the junction of the head and thorax of a mosquito observed with a microscope. 3 is an image of the internal trachea at the junction of the head and thorax of a mosquito that has been contacted with the composition of Example 3. 4 is an image of the internal trachea at the junction of the head and thorax of a mosquito that has been contacted with the composition of Comparative Example 1 observed with a microscope. Detailed Description of the Invention

[0007] The transparent pesticide described in Patent Document 1 takes 5 minutes to 48 hours to exert its pest-control effect, and the wasp trap described in Patent Document 2 also takes about 200 seconds to kill the wasp. However, the inventors have discovered that if it takes more than 3 minutes to kill the pest, the pest may shake its body, shaking off the pesticide and preventing it from being killed. The present invention relates to a pest arthropod control composition that can achieve a high lethal effect on pest arthropods in a shorter time.

[0008] The present inventors have discovered that the above-mentioned problems can be solved by a composition that contains a specific surfactant and one or more components selected from the group consisting of specific nonionic surfactants and oily components in specific proportions, and that satisfies certain requirements.

[0009] According to the present invention, it is possible to provide a pest arthropod control composition that can achieve a high lethal effect on pest arthropods in a shorter period of time.

[0010] [Definition] As used herein, the term "harmful arthropod control composition" refers to a composition that can prevent and reduce damage caused by harmful arthropods by exerting a lethal effect on harmful arthropods. More details on harmful arthropods are provided below. As used herein, "elimination of harmful arthropods" refers to a state in which, after application of the composition to harmful arthropods, the harmful arthropods become slowed down and have difficulty moving, eventually dying, resulting in the pests becoming unable to move (knocked down). The pest control effect is evaluated by the knockdown rate after application of the composition to harmful arthropods. Specifically, the knockdown rate can be evaluated by the method described in the Examples. The pest arthropod control composition of the present invention includes compositions that are applied directly to harmful arthropods, as well as compositions that are diluted with water or the like before use and then applied to harmful arthropods. When the composition is diluted before use, the content of each component in the pest arthropod control composition of the present invention also includes the content of each component in the composition after dilution, i.e., when applied to harmful arthropods.

[0011] [Harmful Arthropod Control Composition] A first harmful arthropod control composition of the present invention (hereinafter also referred to simply as the "composition of the first invention" or "composition (1)") contains the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of nonionic surfactants (a11) and oily components (a12), having a solubility X in water at 25°C of 5 g / kg or less, and having a solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C of Y / X of 1.2 or more, where Yg / kg is the solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C, and (B1) a surfactant including an ionic surfactant (b1), wherein the mass ratio of component (B1) to component (A1) in the composition [(B1) / (A1)] is 4 or more and 30 or less. A second pest arthropod control composition of the present invention (hereinafter also simply referred to as the "composition of the second invention" or "composition (2)") is a pest arthropod control composition containing the following components (A2) and (B2): (A2) one or more selected from the group consisting of nonionic surfactants (a21) and oily components (a22), each having a solubility X in water at 25°C of 5 g / kg or less; (B2) a nonionic surfactant other than component (a21); wherein the composition further contains water; the mass ratio of component (B2) to component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less; the total content of component (A2) and component (B2) in the composition is 0.15 mass% or more; and component (A) is dissolved in the composition. The compositions of the first and second inventions of the present invention (hereinafter collectively referred to as "compositions of the present invention") have the above-mentioned constitution, and thus can achieve a high lethal effect against harmful arthropods in a shorter period of time.

[0012] While the reason why the composition of the present invention exhibits the above-mentioned effects is unclear, it is believed to be as follows. When the composition of the present invention comes into contact with harmful arthropods having spiracles, it quickly penetrates into the spiracles, penetrating into the head, where organs important for the survival of the harmful arthropods are located, thereby inhibiting their function. This is presumably why a high lethal effect on harmful arthropods can be achieved in a short period of time. That is, the composition of the present invention is a composition that has the ability to penetrate from the spiracles to the inside of the trachea of ​​harmful arthropods and further into the head. Here, the composition of the present invention contains component (A1) or component (A2) as the main active ingredient for controlling harmful arthropods. It is believed that components (A1) and (A2) improve the permeability of the composition from the spiracles to the inside of the trachea of ​​harmful arthropods, and that further penetration into the thorax and head can achieve a lethal effect on harmful arthropods in a short period of time. However, because components (A1) and (A2) have low solubility in water, the penetration effect of the composition from the spiracles to the inside of the trachea of ​​harmful arthropods, which is derived from components (A1) and (A2), may not be fully exerted. Therefore, in the composition of the first invention, a surfactant containing an ionic surfactant (b1) is used as component (B1) in a predetermined ratio. This is thought to improve the solubility of component (A1) in water, thereby enabling the composition to effectively exhibit its penetrating effect from the spiracles to the inside of the trachea of ​​harmful arthropods. In the composition of the second invention, a nonionic surfactant other than component (a21) (i.e., other than component (A2)) is used as component (B2) in a predetermined ratio, and component (A2) is dissolved in the composition, thereby enabling the composition to effectively exhibit its penetrating effect from the spiracles to the inside of the trachea of ​​harmful arthropods. Note that component (A1) or component (A2) does not exert its effect simply in a dissolved state; it is thought that the pest control effect is exhibited by using it in combination with components (B1) and (B2) in a specific ratio.

[0013] Whether or not the composition of the present invention has penetrated through the spiracles to the head of a harmful arthropod can be determined by the following method. A dye (Blue No. 1) is added to the composition of the present invention so that the concentration in the composition becomes 0.03% by mass to prepare a colored composition. 200 μL of the colored composition is dropped onto the spiracles of a harmful arthropod. These procedures are carried out by fixing the abdomen of the harmful arthropod, which has been previously subjected to low-temperature treatment and put into a state of suspended animation, to an insect pin using a UV-curable resin, and observing it under a microscope while restricting its movement. If, after 2 minutes, it is observed under a microscope that the internal trachea at the junction of the head and thorax of the harmful arthropod has turned blue, it is determined that the harmful arthropod control composition has penetrated into the head of the harmful arthropod.

[0014] In the present invention, "harmful arthropods" primarily include arthropods that are harmful to humans, livestock, and their living spaces, as well as agricultural crops or horticultural plants. Examples of arthropods include insects, crustaceans, spiders, centipedes, etc., and are typically insects. From the viewpoint of achieving a harmful arthropod extermination effect in a short period of time through the aforementioned mechanism of action, the harmful arthropods are preferably arthropods that have spiracles.

[0015] Specific examples of harmful arthropods include sanitary pests such as mosquitoes, black flies, flies, horseflies, midges, cockroaches, and mites; nuisance pests such as bees, ants, stink bugs, pill bugs, spiders, millipedes, centipedes, and house centipedes; and agricultural pests such as grasshoppers, locusts, planthoppers, moths, thrips, scale insects, cucumber beetles, aphids, and caterpillars. The composition of the present invention is particularly effective in controlling mosquitoes, black flies, flies, horseflies, midges, cockroaches, stink bugs, thrips, scale insects, cucumber beetles, and aphids. In this example, the control effect of the composition is evaluated based on the mosquito knockdown rate, but the harmful arthropods that are the target of the composition of the present invention are not limited to mosquitoes.

[0016] [Composition (1)] The components contained in the composition of the first invention (composition (1)) are described below. <Component (A1)> Component (A1) is one or more components selected from the group consisting of nonionic surfactants (a11) and oily components (a12), whose solubility X in water at 25°C is 5 g / kg or less, and whose solubility in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C, Y / X, is 1.2 or greater, where Yg / kg is the solubility. Component (A1) acts as the main active ingredient for controlling harmful arthropods. The solubility X (g / kg) of component (A1) in water at 25°C is 5 g / kg or less, preferably 4 g / kg or less, and more preferably 3.5 g / kg or less, from the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time. The solubility X (g / kg) of component (A1) in water at 25°C is preferably 0.001 g / kg or more and 5 g / kg or less, more preferably 0.01 g / kg or more and 4 g / kg or less, more preferably 0.03 g / kg or more and 3.5 g / kg or less, and even more preferably 0.1 g / kg or more and 3.5 g / kg or less.

[0017] When the solubility of component (A1) in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C is Y (g / kg), Y / X is 1.2 or more, preferably 2 or more, and more preferably 4 or more, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter time. The upper limit is not particularly limited, but is preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, still more preferably 10 or less, and even more preferably 4.5 or less. Y / X is preferably 1.2 or more and 100 or less, more preferably 2 or more and 50 or less, more preferably 2 or more and 30 or less, still more preferably 4 or more and 10 or less, and even more preferably 4 or more and 4.5 or less.

[0018] When the solubility of component (A1) in a 0.05% by mass aqueous sodium lauryl sulfate solution at 25°C is defined as Y (g / kg), the solubility Y (g / kg) is not particularly limited as long as it satisfies the Y / X ratio of 1.2 or greater. From the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time, the solubility Y (g / kg) is preferably 0.035 g / kg or greater, more preferably 0.05 g / kg or greater, more preferably 0.07 g / kg or greater, even more preferably 0.1 g / kg or greater, still more preferably 0.5 g / kg or greater, and is preferably 100 g / kg or less, more preferably 50 g / kg or less, even more preferably 10 g / kg or less, and still more preferably 5 g / kg or less. The solubility Y (g / kg) is preferably 0.035 g / kg or more and 100 g / kg or less, more preferably 0.05 g / kg or more and 50 g / kg or less, more preferably 0.07 g / kg or more and 10 g / kg or less, even more preferably 0.1 g / kg or more and 10 g / kg or less, and still more preferably 0.5 g / kg or more and 5 g / kg or less.

[0019] Component (A1) is one or more components selected from the group consisting of nonionic surfactants (a11) and oily components (a12). Examples of the nonionic surfactant (a11) (hereinafter also referred to as "component (a11)") preferably used as component (A1) include polyoxyalkylene alkyl ethers, polyoxyalkylene sorbitan fatty acid esters, alkyl glucosides, alkyl glyceryl ethers, polyglycerin fatty acid esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene-modified silicones that satisfy the above solubility. Among the above, from the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter time, component (a11) preferably includes one or more selected from the group consisting of polyoxyalkylene alkyl ethers and alkyl glyceryl ethers.

[0020] The alkyl group in the polyoxyalkylene alkyl ether preferably has 8 to 22 carbon atoms, more preferably 8 to 18 carbon atoms, even more preferably 8 to 16 carbon atoms, still more preferably 8 to 14 carbon atoms, and even more preferably 8 to 12 carbon atoms. From the viewpoint of achieving a solubility X in water at 25°C of 5 g / kg or less, the polyoxyalkylene alkyl ether used as component (a11) preferably comprises one or more selected from the group consisting of polyoxyethylene alkyl ethers having an average number of moles of ethylene oxide (EO) added of 3 or less and polyoxypropylene alkyl ethers, more preferably polyoxypropylene alkyl ethers. The average number of moles of propylene oxide (PO) added in the polyoxypropylene alkyl ether is preferably 1 to 20, more preferably 2 to 10, and even more preferably 2 to 5.

[0021] Specific examples of polyoxypropylene alkyl ethers used as component (a11) include PPG-3 caprylyl ether ("KAO SOFCARE GP-1" manufactured by Kao Corporation).

[0022] The alkyl glyceryl ether used as component (a11) preferably includes an alkyl glyceryl ether having an alkyl group having from 8 to 22 carbon atoms, more preferably from 8 to 18 carbon atoms, even more preferably from 8 to 14 carbon atoms, and even more preferably from 8 to 12 carbon atoms. The alkyl group may be either a linear alkyl group or a branched alkyl group, but from the viewpoint of improving the ease of penetration from the spiracles to the thorax and head of harmful arthropods, a branched alkyl group is preferred. Specific examples of the alkyl glyceryl ether used as component (a11) include octyl glyceryl ether, 2-ethylhexyl glyceryl ether, nonyl glyceryl ether, decyl glyceryl ether, isodecyl glyceryl ether, lauryl glyceryl ether, tridecyl glyceryl ether, myristyl glyceryl ether, stearyl glyceryl ether, isostearyl glyceryl ether, and mixtures of two or more thereof. Among these, the alkyl glyceryl ether preferably includes one or more selected from the group consisting of 2-ethylhexyl glyceryl ether, decyl glyceryl ether, isodecyl glyceryl ether, and lauryl glyceryl ether, and more preferably includes one or more selected from the group consisting of 2-ethylhexyl glyceryl ether and isodecyl glyceryl ether.

[0023] From the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time, component (a11) more preferably comprises one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ether, and even more preferably 2-ethylhexyl glyceryl ether.

[0024] The oil component (a12) (hereinafter also referred to as "component (a12)") used as component (A1) includes alcohols, esters, ethers, hydrocarbons, and silicones having 8 or more carbon atoms that satisfy the above-mentioned solubility. Among the above, from the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time, component (a12) preferably includes one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms, and more preferably includes an alcohol having 8 or more carbon atoms.

[0025] The alcohols having 8 or more carbon atoms used as component (a12) are preferably monohydric or dihydric alcohols having 8 to 22 carbon atoms, more preferably monohydric alcohols having 8 to 22 carbon atoms, even more preferably monohydric alcohols having 8 to 18 carbon atoms, still more preferably monohydric alcohols having 8 to 14 carbon atoms, even more preferably monohydric alcohols having 8 to 12 carbon atoms, and even more preferably monohydric alcohols having 8 to 9 carbon atoms. The alcohols may be linear, branched, or cyclic alcohols, but from the viewpoint of improving the ease of penetration from the spiracles to the thorax and head of harmful arthropods, linear or branched alcohols are preferred, and linear alcohols are more preferred. The alcohols may be saturated or unsaturated alcohols, and preferably saturated alcohols.

[0026] Specific examples of the alcohols include one or more selected from the group consisting of octyl alcohol, 2-ethylhexanol, nonyl alcohol, isononyl alcohol, decanol, isodecyl alcohol, undecanol, lauryl alcohol, isododecanol, oleyl alcohol, and isostearyl alcohol.

[0027] Component (A1) may be one or more of the above. From the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time, component (A1) preferably contains one or more selected from the group consisting of a nonionic surfactant (a11) and alcohols having 8 or more carbon atoms, more preferably one or more selected from the group consisting of polyoxyalkylene alkyl ethers, alkyl glyceryl ethers, and monohydric alcohols having 8 to 18 carbon atoms, even more preferably one or more selected from the group consisting of polyoxypropylene alkyl ethers, alkyl glyceryl ethers, and monohydric alcohols having 8 to 12 carbon atoms, even more preferably one or more selected from the group consisting of PPG-3 caprylyl ether, 2-ethylhexyl glyceryl ether, isodecyl glyceryl ether, and octyl alcohol, and even more preferably 2-ethylhexyl glyceryl ether.

[0028] <Component (B1)> Component (B1) is a surfactant containing an ionic surfactant (b1). (Ionic surfactant (b1)) In this specification, the ionic surfactant (b1) may be one or more selected from the group consisting of anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0029] [Anionic Surfactants] Examples of the anionic surfactant used as component (b1) include sulfate ester-type anionic surfactants such as alkyl or alkenyl sulfates and alkyl or alkenyl ether sulfates; carboxylic acid-type anionic surfactants such as saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates and N-acylamino acid salts; sulfonic acid-type anionic surfactants such as alkyl sulfosuccinates, alkyl sulfonates, α-olefin sulfonates, internal olefin sulfonates, alkyl benzene sulfonates, α-sulfofatty acid methyl ester salts and acyl methyl taurine salts; and phosphate ester-type anionic surfactants such as alkyl phosphates, polyoxyethylene alkyl ether phosphates and polyoxyethylene alkyl phenyl ether phosphates. One or more of these may be used. Among these, from the viewpoints of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the composition preferably contains one or more selected from the group consisting of alkyl or alkenyl sulfates, alkyl or alkenyl ether sulfates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, N-acylamino acid salts, alkyl sulfosuccinates, alkyl sulfonates, α-olefin sulfonates, internal olefin sulfonates, alkylbenzene sulfonates, α-sulfofatty acid methyl ester salts, acyl methyl taurine salts, and alkyl phosphates, more preferably one or more selected from the group consisting of alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, saturated or unsaturated fatty acid salts, and alkyl sulfosuccinates, and even more preferably one or more selected from the group consisting of alkyl ether sulfates, alkyl sulfates, saturated fatty acid salts, and alkyl sulfosuccinates.

[0030] The alkyl or alkenyl group and fatty acid in the anionic surfactant preferably have from 8 to 22 carbon atoms, more preferably from 8 to 18 carbon atoms, even more preferably from 8 to 14 carbon atoms, and still more preferably from 8 to 12 carbon atoms, from the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing their death in a short period of time.

[0031] Examples of the counter ion of the anionic group of the anionic surfactant include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanolammonium having 1 to 3 alkanol groups having 2 or 3 carbon atoms (for example, monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium, etc.).

[0032] Among the preferred anionic surfactants used as component (b1), alkyl ether sulfates include polyoxyethylene lauryl ether sodium sulfates such as sodium laureth sulfate, and alkyl sulfates include sodium lauryl sulfate and ammonium lauryl sulfate. Examples of saturated fatty acid salts include sodium laurate. Examples of alkyl sulfosuccinates include monoalkyl sulfosuccinates and dialkyl sulfosuccinates, with dialkyl sulfosuccinates being preferred, and specific examples thereof include dioctyl sodium sulfosuccinate. Among the above, from the viewpoints of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the anionic surfactant used as component (b1) preferably includes one or more selected from the group consisting of polyoxyethylene lauryl ether sodium sulfate, sodium lauryl sulfate, sodium laurate, and dioctyl sodium sulfosuccinate, and more preferably includes dioctyl sodium sulfosuccinate.

[0033] [Cationic Surfactant] Examples of the cationic surfactant used as component (b1) include quaternary ammonium salt-type cationic surfactants such as alkyltrimethylammonium salts, alkoxyalkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylamidoalkyltrimethylammonium salts, alkylbenzyldimethylammonium salts, and alkylpyridinium salts; and amine salt-type cationic surfactants such as alkyldimethylamines and salts thereof, alkoxyalkyldimethylamines and salts thereof, alkylamidoalkyldimethylamines and salts thereof, diethanolamine monoalkyl esters and salts thereof, triethanolamine monoalkyl esters and salts thereof, and triethanolamine dialkyl esters and salts thereof, and one or more of these may be used.

[0034] The alkyl group in the alkyltrimethylammonium salt, alkoxyalkyltrimethylammonium salt, dialkyldimethylammonium salt, alkylbenzyldimethylammonium salt, alkylpyridinium salt, alkyldimethylamine and its salt, and alkoxyalkyldimethylamine and its salt preferably has from 8 to 22 carbon atoms, more preferably from 8 to 18 carbon atoms, from the viewpoint of improving the solubility of component (A1) and facilitating penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time. The alkyl group in the alkylamidoalkyltrimethylammonium salt, alkylamidoalkyldimethylamine and its salt, diethanolamine monoalkyl ester and its salt, triethanolamine monoalkyl ester and its salt, and triethanolamine dialkyl ester and its salt preferably has from 7 to 21 carbon atoms, more preferably from 7 to 17 carbon atoms, from the viewpoint of improving the solubility of component (A1) and facilitating penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time.

[0035] Counter ions of the cationic groups in the alkyltrimethylammonium salts, alkoxyalkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylamidoalkyltrimethylammonium salts, alkylbenzyldimethylammonium salts, and alkylpyridinium salts include alkyl sulfate ions having from 1 to 3 carbon atoms, sulfate ions, phosphate ions, carboxylate ions having from 1 to 3 carbon atoms (formate ions, acetate ions, propionate ions), and halide ions such as chloride ions and bromide ions. Among these, from the viewpoints of ease of production and ease of availability of raw materials, halide ions are preferred, and chloride ions are more preferred.

[0036] Alkyldimethylamines, alkoxyalkyldimethylamines, alkylamidoalkyldimethylamines, diethanolamine monoalkyl esters, triethanolamine monoalkyl esters, and triethanolamine dialkyl esters may be reacted with an acid in advance to form a salt and then incorporated into the composition, or they may be incorporated directly into the composition and then an acid is added to form a salt therein. Therefore, the above amines, alkyl esters, and their salts are defined herein as cationic surfactants. The content is calculated based on the mass of the amines and alkyl esters. Examples of salts of alkyldimethylamines, alkoxyalkyldimethylamines, alkylamidoalkyldimethylamines, diethanolamine monoalkyl esters, triethanolamine monoalkyl esters, and triethanolamine dialkyl esters include salts with organic or inorganic acids. Examples of organic acids include monocarboxylic acids such as acetic acid and propionic acid, dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid and phthalic acid, polycarboxylic acids such as polyglutamic acid, hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid and citric acid, and acidic amino acids such as glutamic acid and aspartic acid. Examples of inorganic acids include hydrochloric acid, sulfuric acid and phosphoric acid.

[0037] Among the above, from the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the cationic surfactant preferably includes one or more selected from the group consisting of alkyltrimethylammonium salts such as cetyltrimethylammonium chloride; alkoxyalkyltrimethylammonium salts such as stearoxypropyltrimethylammonium chloride; dialkyldimethylammonium salts such as distearyldimethylammonium chloride; alkylamidoalkyltrimethylammonium salts such as palmitamidopropyltrimethylammonium chloride; and alkylbenzyldimethylammonium salts such as benzalkonium chloride, and more preferably includes alkylbenzyldimethylammonium salts. Furthermore, among the above, from the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the cationic surfactant preferably includes one or more selected from the group consisting of cetyltrimethylammonium chloride, stearoxypropyltrimethylammonium chloride, distearyldimethylammonium chloride, palmitamidopropyltrimethylammonium chloride, and benzalkonium chloride, and more preferably includes benzalkonium chloride.

[0038] [Amphoteric Surfactant] Examples of the amphoteric surfactant used as component (b1) include amine oxide type amphoteric surfactants such as alkyldimethylamine oxide and amidopropyldimethylamine oxide; carboxybetaine type amphoteric surfactants such as alkyldimethylaminoacetic acid betaine and fatty acid amidopropyl betaine; N-alkyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, N-alkanoylaminopropyl ... alkyl sulfobetaine or alkylamidohydroxysulfobetaine amphoteric surfactants such as 2-alkyl-N-carboxymethylimidazolinium betaine and 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine; 2-alkylimidazoline amphoteric surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine; and amino acid amphoteric surfactants such as N-alkyl-β-aminopropionic acid and salts thereof, and alkyl (or dialkyl)diethylenetriaminoacetic acid and salts thereof, and one or more of these may be used.

[0039] Among the above, from the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the amphoteric surfactant preferably includes one or more selected from the group consisting of amine oxide amphoteric surfactants and carboxybetaine amphoteric surfactants, and more preferably includes one or more selected from the group consisting of alkyldimethylamine oxides and fatty acid amidopropyl betaines. From the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the alkyl group in the alkyldimethylamine oxide preferably has from 8 to 22 carbon atoms, more preferably from 8 to 18 carbon atoms, even more preferably from 8 to 14 carbon atoms, and even more preferably from 8 to 12 carbon atoms. Specific examples of alkyldimethylamine oxides include one or more selected from the group consisting of lauryldimethylamine oxide, myristyldimethylamine oxide, and cocoalkyldimethylamine oxide, and preferably includes lauryldimethylamine oxide. The fatty acid in the fatty acid amidopropyl betaine is preferably a saturated fatty acid having from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms, and even more preferably from 8 to 12 carbon atoms. The fatty acid amidopropyl betaine preferably includes lauric acid amidopropyl betaine.

[0040] One or more kinds of component (b1) can be used. Among the above, from the viewpoint of improving the solubility of component (A1) and promoting penetration of the composition from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, thereby causing death in a short period of time, component (b1) preferably contains one or more kinds selected from the group consisting of cationic surfactants and amphoteric surfactants, or alkyl or alkenyl sulfates, alkyl or alkenyl ether sulfates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, N-acylamino acid salts, alkyl sulfosuccinates, alkyl sulfonates, α-olefin sulfonates, internal olefin sulfonates, alkylbenzene sulfonates, α-sulfofatty acid methyl ester salts, and alkyl or alkenyl groups, and fatty acids having from 8 to 22 carbon atoms. The surfactant contains one or more anionic surfactants selected from the group consisting of alkyl methyl taurine salts and alkyl phosphates, more preferably one or more selected from the group consisting of alkyl ether sulfates, alkyl sulfates, saturated fatty acid salts, sulfosuccinate alkyl ester salts, benzalkonium chloride, alkyl dimethylamine oxide, and fatty acid amidopropyl betaine, in which the alkyl group or fatty acid has from 8 to 22 carbon atoms, and even more preferably one or more selected from the group consisting of polyoxyethylene lauryl ether sodium sulfate, sodium lauryl sulfate, sodium laurate, dioctyl sodium sulfosuccinate, benzalkonium chloride, lauryl dimethylamine oxide, and lauric acid amidopropyl betaine.

[0041] Component (B1) may contain a surfactant other than component (b1) to the extent that the effects of the present invention are not impaired, provided that the content of component (b1) in component (B1) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, and still more preferably 95% by mass or more, but not more than 100% by mass.

[0042] The mass ratio of component (B1) to component (A1) in the composition of the first invention [(B1) / (A1)] is from 4 to 30, preferably from 4 to 25, more preferably from 4 to 20, even more preferably from 4 to 15, still more preferably from 4 to 12, and even more preferably from 4 to 10, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter period of time.

[0043] From the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time, the content of component (A1) in the composition of the first invention is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.005% by mass or more, still more preferably 0.01% by mass or more, still more preferably 0.02% by mass or more, still more preferably 0.04% by mass or more, still more preferably 0.06% by mass or more, and still more preferably 0.07% by mass or more. Furthermore, from the viewpoint of improving the solubility of component (A1) in the composition, promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in death in a short period of time, and from the viewpoint of the appearance of the residue after drying, the content is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, even more preferably 0.6% by mass or less, even more preferably 0.5% by mass or less, even more preferably 0.4% by mass or less, even more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less. The content of component (A1) in the composition of the first invention is preferably 0.001% by mass or more and 10% by mass or less, more preferably 0.002% by mass or more and 8% by mass or less, even more preferably 0.003% by mass or more and 6% by mass or less, even more preferably 0.005% by mass or more and 5% by mass or less, even more preferably 0.01% by mass or more and 3% by mass or less, even more preferably 0.02% by mass or more and 2% by mass or less, even more preferably 0.02% by mass or more and 1.5% by mass or less, and even more preferably The content is 0.04% by mass or more and 1.2% by mass or less, even more preferably 0.04% by mass or more and 1% by mass or less, even more preferably 0.04% by mass or more and 0.8% by mass or less, even more preferably 0.06% by mass or more and 0.6% by mass or less, even more preferably 0.06% by mass or more and 0.5% by mass or less, even more preferably 0.07% by mass or more and 0.4% by mass or less, even more preferably 0.07% by mass or more and 0.3% by mass or less, and even more preferably 0.07% by mass or more and 0.2% by mass or less.

[0044] When the composition of the first invention contains the component (a11), the content of component (a11) in the composition of the first invention is, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter time, preferably 0.001% by mass or more, more preferably 0.002% by mass or more, even more preferably 0.003% by mass or more, still more preferably 0.005% by mass or more, still more preferably 0.01% by mass or more, still more preferably 0.02% by mass or more, still more preferably 0.04% by mass or more, still more preferably 0.05% by mass or more, still more preferably 0.07% by mass or more, and still more preferably 0.08% by mass or more. Furthermore, from the viewpoint of improving the solubility of component (a11) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the content is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, even more preferably 0.6% by mass or less, even more preferably 0.5% by mass or less, even more preferably 0.4% by mass or less, even more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less.The content of component (a11) in the composition of the first invention is preferably 0.001% by mass or more and 10% by mass or less, more preferably 0.002% by mass or more and 8% by mass or less, even more preferably 0.003% by mass or more and 6% by mass or less, even more preferably 0.005% by mass or more and 5% by mass or less, even more preferably 0.01% by mass or more and 3% by mass or less, even more preferably 0.02% by mass or more and 2% by mass or less, even more preferably 0.02% by mass or more and 1.5% by mass or less, and even more preferably The content is 0.04% by mass or more and 1.2% by mass or less, even more preferably 0.04% by mass or more and 1% by mass or less, even more preferably 0.05% by mass or more and 0.8% by mass or less, even more preferably 0.05% by mass or more and 0.6% by mass or less, even more preferably 0.07% by mass or more and 0.5% by mass or less, even more preferably 0.07% by mass or more and 0.4% by mass or less, even more preferably 0.07% by mass or more and 0.3% by mass or less, and even more preferably 0.08% by mass or more and 0.2% by mass or less.

[0045] From the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time, the content of component (B1) in the composition of the first invention is preferably 0.004% by mass or more, more preferably 0.008% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.02% by mass or more, still more preferably 0.04% by mass or more, still more preferably 0.08% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and still more preferably 0.24% by mass or more. Also, from the viewpoint of improving the solubility of component (B1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in their death in a short period of time, the content is preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 3% by mass or less, still more preferably 2% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 1% by mass or less. The content of component (B1) in the composition of the first invention is preferably 0.004% by mass or more and 30% by mass or less, more preferably 0.008% by mass or more and 20% by mass or less, even more preferably 0.01% by mass or more and 10% by mass or less, still more preferably 0.02% by mass or more and 5% by mass or less, still more preferably 0.04% by mass or more and 3% by mass or less, still more preferably 0.08% by mass or more and 2% by mass or less, still more preferably 0.1% by mass or more and 1.5% by mass or less, still more preferably 0.2% by mass or more and 1% by mass or less, and still more preferably 0.24% by mass or more and 1% by mass or less.

[0046] From the viewpoint of improving the effect of obtaining a high lethal effect against harmful arthropods in a shorter time, the content of component (b1) in the composition of the first invention is preferably 0.004% by mass or more, more preferably 0.008% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.02% by mass or more, still more preferably 0.04% by mass or more, still more preferably 0.08% by mass or more, still more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more. Also, from the viewpoint of improving the solubility of component (b1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in their death in a short time, the content is preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 3% by mass or less, still more preferably 2% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.8% by mass or less, and still more preferably 0.6% by mass or less. The content of component (b1) in the composition of the first invention is preferably 0.004% by mass or more and 30% by mass or less, more preferably 0.008% by mass or more and 20% by mass or less, even more preferably 0.01% by mass or more and 10% by mass or less, even more preferably 0.02% by mass or more and 5% by mass or less, even more preferably 0.04% by mass or more and 3% by mass or less, even more preferably 0.04% by mass or more and 2% by mass or less, even more preferably 0.08% by mass or more and 1.5% by mass or less, even more preferably 0.08% by mass or more and 1% by mass or less, even more preferably 0.1% by mass or more and 0.8% by mass or less, and even more preferably 0.2% by mass or more and 0.6% by mass or less.

[0047] From the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter time, the total content of component (A1) and component (B1) in the composition of the first invention is preferably 0.005% by mass or more, even more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, even more preferably 0.25% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.32% by mass or more, even more preferably 0.36% by mass or more, and even more preferably 0.4% by mass or more. Furthermore, from the viewpoint of improving the solubility of component (A1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, the content is preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, and even more preferably 1% by mass or less. The total content of component (A1) and component (B1) in the composition of the first invention is preferably 0.005% by mass or more and 40% by mass or less, even more preferably 0.01% by mass or more and 30% by mass or less, even more preferably 0.02% by mass or more and 20% by mass or less, even more preferably 0.05% by mass or more and 10% by mass or less, even more preferably 0.1% by mass or more and 5% by mass or less, even more preferably 0.2% by mass or more and 2% by mass or less, even more preferably 0.25% by mass or more and 1.5% by mass or less, even more preferably 0.3% by mass or more and 1.2% by mass or less, even more preferably 0.32% by mass or more and 1.2% by mass or less, even more preferably 0.36% by mass or more and 1% by mass or less, and even more preferably 0.4% by mass or more and 1% by mass or less.

[0048] <Component (C1): Alcohol Having 4 or Less Carbon Atoms> The composition of the first invention may further contain, as component (C1), an alcohol having 4 or less carbon atoms, for the purpose of further improving the solubility of component (A1) in the composition. Component (C1) is preferably a monohydric or dihydric alcohol, and specific examples include methanol, ethanol, isopropyl alcohol, butyl alcohol, and propylene glycol. One or more of these may be used. Among the above, from the viewpoints of improving the solubility of component (A1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time, component (C1) preferably contains one or more selected from the group consisting of ethanol and isopropyl alcohol, and more preferably contains ethanol.

[0049] When the composition of the first invention contains component (C1), the content of component (C1) in the composition of the first invention is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and is preferably 80% by mass or less, more preferably 60% by mass or less, even more preferably 40% by mass or less, still more preferably 20% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of improving the solubility of component (A1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, thereby causing death in a short period of time. The content of component (C1) in the composition of the first invention is preferably 1% by mass or more and 80% by mass or less, more preferably 3% by mass or more and 60% by mass or less, even more preferably 5% by mass or more and 40% by mass or less, still more preferably 5% by mass or more and 20% by mass or less, and even more preferably 5% by mass or more and 10% by mass or less. The composition of the first invention may not contain component (C1); for example, the content of component (C1) in the composition of the first invention may be less than 1 mass%, preferably less than 0.5 mass%, more preferably less than 0.1 mass%, and even more preferably 0 mass%.

[0050] The mass ratio of component (C1) to component (A1) in the composition of the first invention [(C1) / (A1)] is preferably 5 or more and 500 or less, more preferably 10 or more and 300 or less, even more preferably 30 or more and 200 or less, and still more preferably 60 or more and 100 or less, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a short period of time.

[0051] The ratio of the total content of component (B1) and component (C1) to the mass of component (A1) in the composition of the first invention [((B1) + (C1)) / (A1)] is preferably 5 or more and 500 or less, more preferably 10 or more and 300 or less, even more preferably 30 or more and 200 or less, and still more preferably 60 or more and 100 or less, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a short period of time.

[0052] <Component (D): Fragrance> The composition of the first invention may further contain a fragrance as component (D). Examples of component (D) include amyl butyrate, isoeugenol, isopulegol, isomenthone, ethyl vanillin, eugenol, eugenol acetate, ocimene, capric acid, caryophyllene, carvacrol, carvone, camphor, camphene, cinnamic acid, ethyl cinnamate, geraniol, geranyl acetate, germacrene, methyl salicylate, citral, citronellal, citronellol, 1,8-cineole (eucalyptol), dillapiole, cinnamyl acetate, cinnamyl alcohol, cinnamyl aldehyde, cymene, cedrene, cedrol, tamarind, cinnamyl benzoate ... and one or more selected from the group consisting of melon, thymol, thujopsene, tetrahydrolinalool, terpineol, terpinen-4-ol, terpinene, butyl lactate, nepetalactone, neral, nerol, vanillin, pinene, piperonal, piperonyl alcohol, phenandrene, 2-phenylethylpropionate, pulegone, heliotropin, verbenone, benzyl acetate, benzyl alcohol, benzyl benzoate, bornyl acetate, myrcene, p-menthane-3,8-diol, menthol, menthone, linalool, and limonene. When the composition of the first invention contains component (D), the content of component (D) in the composition is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and even more preferably 0.01% by mass or more, and is preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less.

[0053] <Water> The composition of the first invention preferably further contains water. The water used in the present invention is not particularly limited, and for example, ion-exchanged water, pure water, distilled water, etc. can be used. When the composition of the first invention contains water, the content of water in the composition of the first invention is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 85% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 99.8% by mass or less, more preferably 99.7% by mass or less. The water content in the composition of the first invention is preferably 50% by mass or more and 99.8% by mass or less, more preferably 60% by mass or more and 99.8% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.7% by mass or less, still more preferably 85% by mass or more and 99.7% by mass or less, still more preferably 90% by mass or more and 99.7% by mass or less, and still more preferably 95% by mass or more and 99.7% by mass or less. The water content in the composition of the first invention may be the remainder of component (A1) and component (B1).

[0054] <Other Components> The composition of the first invention may contain, in addition to the above-mentioned components, for example, a thickener, a preservative, a colorant, a pH adjuster, etc., within a range that does not impair the effects of the invention. However, the content of components other than component (A1), component (B1), component (C1), and water in the composition of the first invention is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.5% by mass or less, and still more preferably 0.1% by mass or less.

[0055] The method for producing the composition of the first invention is not particularly limited. For example, the composition can be produced by blending the components (A1) and (B1) and other components used as needed, and mixing them using a known stirring device or the like.

[0056] [Composition (2)] The components contained in the composition of the second invention (composition (2)) are described below. <Component (A2)> Component (A2) is one or more components selected from the group consisting of nonionic surfactants (a21) and oily components (a22), each having a solubility X in water at 25°C of 5 g / kg or less. Component (A2) acts as the main active ingredient for controlling harmful arthropods. From the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time, the solubility X (g / kg) of component (A2) in water at 25°C is 5 g / kg or less, preferably 4 g / kg or less, and more preferably 3.5 g / kg or less. Furthermore, the solubility X is preferably 0.001 g / kg or more, more preferably 0.01 g / kg or more, and even more preferably 0.1 g / kg or more. The solubility X (g / kg) of component (A2) in water at 25°C is preferably 0.001 g / kg or more and 5 g / kg or less, more preferably 0.01 g / kg or more and 4 g / kg or less, and more preferably 0.1 g / kg or more and 3.5 g / kg or less.

[0057] Component (A2) is one or more components selected from the group consisting of nonionic surfactants (a21) and oily components (a22). Examples of the nonionic surfactant (a21) (hereinafter also referred to as "component (a21)") preferably used as component (A2) include the same compounds as those exemplified as component (a11). That is, component (a21) preferably includes one or more compounds selected from the group consisting of polyoxyalkylene alkyl ethers and alkyl glyceryl ethers.

[0058] From the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time, component (a21) more preferably comprises one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ether, and even more preferably 2-ethylhexyl glyceryl ether.

[0059] Oil component (a22) (hereinafter also referred to as "component (a22)") used as component (A2) includes the same compounds as those exemplified as component (a12) above. That is, component (a22) preferably includes one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms, and more preferably includes an alcohol having 8 or more carbon atoms. Specific examples of the alcohol include one or more selected from the group consisting of octyl alcohol, 2-ethylhexanol, nonyl alcohol, isononyl alcohol, decanol, isodecyl alcohol, undecanol, lauryl alcohol, isododecanol, oleyl alcohol, and isostearyl alcohol, and even more preferably one or more selected from the group consisting of monohydric alcohols having from 8 to 9 carbon atoms, that is, octyl alcohol, 2-ethylhexanol, and nonyl alcohol.

[0060] The component (A2) can be used alone or in combination of two or more. Among the above, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter time, component (A2) preferably contains one or more selected from the group consisting of nonionic surfactants (a21) and alcohols (a22) having 8 or more carbon atoms, more preferably contains one or more selected from the group consisting of polyoxyalkylene alkyl ethers, alkyl glyceryl ethers, and monohydric alcohols having 8 to 18 carbon atoms, even more preferably contains one or more selected from the group consisting of polyoxypropylene alkyl ethers, alkyl glyceryl ethers, and monohydric alcohols having 8 to 12 carbon atoms, even more preferably contains one or more selected from the group consisting of PPG-3 caprylyl ether, 2-ethylhexyl glyceryl ether, isodecyl glyceryl ether, and octyl alcohol, even more preferably contains 2-ethylhexyl glyceryl ether, and even more preferably contains one or more selected from the group consisting of PPG-3 caprylyl ether, 2-ethylhexyl glyceryl ether, and isodecyl glyceryl ether from the viewpoint of storage stability and odor.

[0061] <Component (B2)> Component (B2) is a nonionic surfactant other than the component (a21). That is, component (B2) is preferably a nonionic surfactant having a solubility X in water at 25°C of more than 5 g / kg. The nonionic surfactant used as component (B2) preferably contains a polyoxyethylene alkyl ether having an average number of added moles of ethylene oxide (EO) of more than 3. The average number of added moles of ethylene oxide (EO) is preferably 4 to 60, more preferably 4 to 40, and even more preferably 4 to 25. The alkyl group in the polyoxyethylene alkyl ether used as component (B2) preferably has 8 to 22 carbon atoms, more preferably 8 to 18 carbon atoms, even more preferably 8 to 16 carbon atoms, still more preferably 8 to 14 carbon atoms, and even more preferably 8 to 12 carbon atoms. That is, component (B2) preferably contains one or more members selected from the group consisting of polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene 2-hexyldecyl ether, each having an average number of moles of ethylene oxide (EO) added of more than 3, and more preferably contains polyoxyethylene lauryl ether having an average number of moles of ethylene oxide (EO) added of 4 or more and 60 or less.

[0062] Specific examples of polyoxyethylene alkyl ethers used as component (B2) include polyoxyethylene (6) lauryl ether ("EMULGEN 108" manufactured by Kao Corporation), polyoxyethylene (16) lauryl ether ("EMULGEN N 116" manufactured by Kao Corporation), polyoxyethylene (23) lauryl ether ("EM ULGEN 123P" manufactured by Kao Corporation), polyoxyethylene (6) stearyl ether ("EMULGEN 306L" manufactured by Kao Corporation), polyoxyethylene (13) oleyl ether ("EMULGEN 420" manufactured by Kao Corporation), and polyoxyethylene (20) 2-hexyldecyl ether ("EMULGEN 1620G" manufactured by Kao Corporation).

[0063] The mass ratio of component (B2) to component (A2) in the composition of the second invention [(B2) / (A2)] is from 4 to 30, preferably from 4 to 25, more preferably from 4 to 20, even more preferably from 4 to 15, still more preferably from 4 to 12, even more preferably from 4 to 10, still more preferably from 4 to 8, and still more preferably from 4 to 5, from the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time.

[0064] The content of component (A2) in the composition of the second invention is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, still more preferably 0.05% by mass or more, and even more preferably 0.06% by mass or more, from the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time. Furthermore, from the viewpoint of improving the solubility of component (A2) in the composition and promoting penetration of the composition from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, causing death in a short period of time, the content is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, even more preferably 0.6% by mass or less, even more preferably 0.5% by mass or less, even more preferably 0.4% by mass or less, even more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less. The content of component (A2) in the composition of the second invention is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.02% by mass or more and 8% by mass or less, even more preferably 0.02% by mass or more and 6% by mass or less, even more preferably 0.04% by mass or more and 5% by mass or less, even more preferably 0.04% by mass or more and 3% by mass or less, even more preferably 0.04% by mass or more and 2% by mass or less, even more preferably 0.04% by mass or more and 1.5% by mass or less, and even more preferably 0. The content is preferably 0.05% by mass or more and 1.2% by mass or less, even more preferably 0.05% by mass or more and 1% by mass or less, even more preferably 0.05% by mass or more and 0.8% by mass or less, even more preferably 0.05% by mass or more and 0.6% by mass or less, even more preferably 0.06% by mass or more and 0.5% by mass or less, even more preferably 0.06% by mass or more and 0.4% by mass or less, even more preferably 0.06% by mass or more and 0.3% by mass or less, and even more preferably 0.06% by mass or more and 0.2% by mass or less.

[0065] When the composition of the second invention contains the component (a21), the content of component (a21) in the composition of the second invention is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, still more preferably 0.05% by mass or more, and even more preferably 0.07% by mass or more, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter period of time. Furthermore, from the viewpoint of improving the solubility of component (a21) in the composition and promoting penetration of the composition from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, resulting in death in a short period of time, the concentration is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, even more preferably 0.6% by mass or less, even more preferably 0.5% by mass or less, even more preferably 0.4% by mass or less, even more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less. The content of component (a21) in the composition of the second invention is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.02% by mass or more and 8% by mass or less, even more preferably 0.02% by mass or more and 6% by mass or less, even more preferably 0.04% by mass or more and 5% by mass or less, even more preferably 0.04% by mass or more and 3% by mass or less, even more preferably 0.04% by mass or more and 2% by mass or less, even more preferably 0.04% by mass or more and 1.5% by mass or less, and even more preferably 0. The content is preferably 0.05% by mass or more and 1.2% by mass or less, even more preferably 0.05% by mass or more and 1% by mass or less, even more preferably 0.05% by mass or more and 0.8% by mass or less, even more preferably 0.05% by mass or more and 0.6% by mass or less, even more preferably 0.07% by mass or more and 0.5% by mass or less, even more preferably 0.07% by mass or more and 0.4% by mass or less, even more preferably 0.07% by mass or more and 0.3% by mass or less, and even more preferably 0.07% by mass or more and 0.2% by mass or less.

[0066] When the composition of the second invention contains the component (a22), the content of component (a22) in the composition of the second invention is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, still more preferably 0.05% by mass or more, and even more preferably 0.07% by mass or more, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter period of time. Furthermore, from the viewpoint of improving the solubility of component (a22) in the composition and promoting penetration of the composition from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, resulting in death in a short period of time, the concentration is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, even more preferably 0.6% by mass or less, even more preferably 0.5% by mass or less, even more preferably 0.4% by mass or less, even more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less. The content of component (a22) in the composition of the second invention is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.02% by mass or more and 8% by mass or less, even more preferably 0.02% by mass or more and 6% by mass or less, even more preferably 0.04% by mass or more and 5% by mass or less, even more preferably 0.04% by mass or more and 3% by mass or less, even more preferably 0.04% by mass or more and 2% by mass or less, even more preferably 0.04% by mass or more and 1.5% by mass or less, and even more preferably 0. The content is preferably 0.05% by mass or more and 1.2% by mass or less, even more preferably 0.05% by mass or more and 1% by mass or less, even more preferably 0.05% by mass or more and 0.8% by mass or less, even more preferably 0.05% by mass or more and 0.6% by mass or less, even more preferably 0.07% by mass or more and 0.5% by mass or less, even more preferably 0.07% by mass or more and 0.4% by mass or less, even more preferably 0.07% by mass or more and 0.3% by mass or less, and even more preferably 0.07% by mass or more and 0.2% by mass or less.

[0067] The content of component (B2) in the composition of the second invention is preferably 0.04% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, and even more preferably 0.24% by mass or more, from the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time. Furthermore, from the viewpoint of improving the solubility of component (B1) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in their death in a short period of time, the content is preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less. The content of component (B2) in the composition of the second invention is preferably 0.04% by mass or more and 30% by mass or less, more preferably 0.08% by mass or more and 20% by mass or less, even more preferably 0.08% by mass or more and 10% by mass or less, even more preferably 0.1% by mass or more and 5% by mass or less, even more preferably 0.1% by mass or more and 3% by mass or less, even more preferably 0.2% by mass or more and 2% by mass or less, even more preferably 0.2% by mass or more and 1.5% by mass or less, even more preferably 0.24% by mass or more and 1% by mass or less, and even more preferably 0.24% by mass or more and 0.5% by mass or less.

[0068] The total content of component (A2) and component (B2) in the composition of the second invention is 0.15% by mass or more, preferably 0.2% by mass or more, and more preferably 0.25% by mass or more, from the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time. Furthermore, from the viewpoint of improving the solubility of component (A2) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in their death in a short period of time, the total content is preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, even more preferably 2% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less, and even more preferably 0.7% by mass or less. The total content of component (A2) and component (B2) in the composition of the second invention is preferably 0.15% by mass or more and 40% by mass or less, more preferably 0.15% by mass or more and 30% by mass or less, even more preferably 0.15% by mass or more and 20% by mass or less, even more preferably 0.15% by mass or more and 10% by mass or less, even more preferably 0.2% by mass or more and 5% by mass or less, even more preferably 0.2% by mass or more and 2% by mass or less, even more preferably 0.2% by mass or more and 1.5% by mass or less, even more preferably 0.2% by mass or more and 1.2% by mass or less, even more preferably 0.25% by mass or more and 1% by mass or less, even more preferably 0.25% by mass or more and 0.8% by mass or less, and even more preferably 0.25% by mass or more and 0.7% by mass or less.

[0069] <Component (C2): Alcohol Having 4 or Less Carbon Atoms> The composition of the second invention may further contain, as component (C2), an alcohol having 4 or less carbon atoms, for the purpose of further improving the solubility of component (A2) in the composition. Component (C2) is preferably a monohydric or dihydric alcohol, and specific examples include methanol, ethanol, isopropyl alcohol, butyl alcohol, and propylene glycol. One or more of these may be used. Among the above, from the viewpoint of improving the solubility of component (A2) in the composition and promoting penetration of the composition from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, thereby causing death in a short period of time, component (C2) preferably contains one or more selected from the group consisting of ethanol and isopropyl alcohol, and more preferably contains ethanol.

[0070] When the composition of the second invention contains component (C2), the content of component (C2) in the composition of the second invention is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, from the viewpoint of improving the solubility of component (A2) in the composition and promoting penetration of the composition from the spiracles to the thorax and head of harmful arthropods, resulting in death in a short period of time. It is also preferably 80% by mass or less, more preferably 60% by mass or less, even more preferably 40% by mass or less, still more preferably 20% by mass or less, still more preferably 10% by mass or less, and still more preferably 8% by mass or less. The content of component (C2) in the composition of the second invention is preferably 1% by mass or more and 80% by mass or less, more preferably 1% by mass or more and 60% by mass or less, even more preferably 3% by mass or more and 40% by mass or less, still more preferably 3% by mass or more and 20% by mass or less, still more preferably 5% by mass or more and 10% by mass or less, and still more preferably 5% by mass or more and 8% by mass or less.

[0071] The mass ratio of component (C2) to component (A2) in the composition of the second invention [(C2) / (A2)] is preferably 10 or more and 300 or less, more preferably 30 or more and 200 or less, and even more preferably 60 or more and 100 or less, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a short period of time.

[0072] The ratio of the total content of component (B2) and component (C2) to the mass of component (A2) in the composition of the second invention [((B2) + (C2)) / (A2)] is preferably 10 or more and 300 or less, more preferably 30 or more and 200 or less, and even more preferably 60 or more and 100 or less, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a short period of time.

[0073] <Component (D): Fragrance> The composition of the second invention may further contain a fragrance as component (D). Examples of component (D) include amyl butyrate, isoeugenol, isopulegol, isomenthone, ethyl vanillin, eugenol, eugenol acetate, ocimene, capric acid, caryophyllene, carvacrol, carvone, camphor, camphene, cinnamic acid, ethyl cinnamate, geraniol, geranyl acetate, germacrene, methyl salicylate, citral, citronellal, citronellol, 1,8-cineole (eucalyptol), dillapiole, cinnamyl acetate, cinnamyl alcohol, cinnamyl aldehyde, cymene, cedrene, cedrol, tamarind, cinnamyl benzoate ... and one or more selected from the group consisting of melon, thymol, thujopsene, tetrahydrolinalool, terpineol, terpinen-4-ol, terpinene, butyl lactate, nepetalactone, neral, nerol, vanillin, pinene, piperonal, piperonyl alcohol, phenandrene, 2-phenylethylpropionate, pulegone, heliotropin, verbenone, benzyl acetate, benzyl alcohol, benzyl benzoate, bornyl acetate, myrcene, p-menthane-3,8-diol, menthol, menthone, linalool, and limonene. When the composition of the second invention contains component (D), the content of component (D) in the composition is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and even more preferably 0.01% by mass or more, and is preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less.

[0074] <Water> The composition of the second invention further contains water. The water used in the present invention is not particularly limited, and for example, ion-exchanged water, pure water, distilled water, etc. can be used. The water content in the composition of the second invention is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, and preferably 99.95% by mass or less, more preferably 99.8% by mass or less, even more preferably 99.7% by mass or less. The water content in the composition of the second invention is preferably 50% by mass or more and 99.95% by mass or less, more preferably 60% by mass or more and 99.95% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.8% by mass or less, even more preferably 90% by mass or more and 99.7% by mass or less. The content of water in the composition of the second invention may be the balance between component (A2) and component (B2), or the balance between component (A2), component (B2), and component (C2). The total content of water and component (C2) in the composition of the second invention is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, and preferably 99.95% by mass or less, more preferably 99.8% by mass or less, and even more preferably 99.7% by mass or less. The total content of water and component (C2) in the composition of the second invention is preferably 50% by mass or more and 99.95% by mass or less, more preferably 60% by mass or more and 99.95% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.8% by mass or less, and even more preferably 90% by mass or more and 99.7% by mass or less.

[0075] <Other Components> The composition of the second invention may contain, in addition to the above-mentioned components, for example, a thickener, a preservative, a colorant, a pH adjuster, etc., within a range that does not impair the effects of the invention. However, the content of components other than component (A2), component (B2), component (C2), and water in the composition of the second invention is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.5% by mass or less, and still more preferably 0.1% by mass or less.

[0076] The composition of the second invention is a composition that is substantially free of an ionic surfactant, and the content of the ionic surfactant in the composition of the second invention is specifically less than 1% by mass, preferably 0.1% by mass or less, more preferably 0.01% by mass or less, even more preferably 0.001% by mass or less, and still more preferably substantially 0% by mass.

[0077] Furthermore, the composition of the second invention is in a state in which component (A2) is dissolved in the composition, from the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time. As used herein, "composition in which component (A2) is dissolved" means that the composition is clear and transparent when visually observed at 25°C. This can be specifically evaluated by the method described in the Examples. Clear and transparent compositions may also be determined by a turbidity (OD660) of 0.05 or less at a wavelength of 660 nm. The state in which component (A2) is dissolved in the composition of the second invention can be achieved by selecting the type and content of component (A2), the type and content of component (B2), the combination and content ratio of component (A2) and component (B2), the type and content of component (C2), and the like.

[0078] The method for producing the composition of the second invention is not particularly limited. For example, the composition can be produced by blending the components (A2) and (B2), water, the optional component (C2), and other components, and mixing them using a known stirring device or the like.

[0079] The following describes matters common to the compositions of the first and second inventions (compositions of the present invention). <Insecticidal component> The composition of the present invention preferably contains a low content of insecticidal components or no insecticidal components, from the viewpoint of safety for humans and the environment, and from the viewpoint of achieving a high lethal effect against harmful arthropods in a shorter period of time using the components (A1), (A2), (B1), and (B2), which are active ingredients for controlling harmful arthropods. The composition of the present invention uses components (A1), (A2), (B1), and (B2) as active ingredients for controlling harmful arthropods, and can be a composition that is highly effective in controlling harmful arthropods even without containing known insecticidal components. Examples of the insecticidal components include known insecticidal components and acaricidal components other than surfactants.

[0080] Examples of the insecticidal component referred to here include pyrethroid insecticides, organophosphate insecticidal components, and carbamate insecticidal components. Examples of the pyrethroid insecticides include metofluthrin, dl,d-T80-allethrin, phthalthrin, d-T80-phthalthrin, d,d-T80-prallethrin, d,d-T98-prallethrin, d-T80-resmethrin, transfluthrin, imiprothrin, cyphenothrin, d,d-T-cyphenothrin, empenthrin, permethrin, fenothrin, etofenprox, and pyrethrins. In addition, examples of insecticidal components other than pyrethroid insecticides include organophosphorus insecticides such as fenitrothion and malathion, carbamate insecticides such as propoxur and carbaryl, acaricides such as kelthane, quinomethionate and hexathiazox, and neonicotinoid insecticides such as imidacloprid, dinotefuran and clothiazinin.

[0081] The content of the insecticidal component in the composition of the present invention is specifically less than 1% by mass, preferably 0.1% by mass or less, more preferably 0.01% by mass or less, even more preferably 0.001% by mass or less, and even more preferably substantially 0% by mass.

[0082] <pH> From the viewpoint of achieving a high lethal effect against harmful arthropods in a short period of time, the pH of the composition of the present invention at 25°C is preferably 10 or less, more preferably 8 or less, and even more preferably 7.5 or less, and from the viewpoint of safety for humans and the environment, it is preferably 3 or more, more preferably 3.5 or more, and even more preferably 4 or more. The pH of the composition of the present invention at 25°C is preferably 3 or more and 10 or less, more preferably 3.5 or more and 8 or less, and even more preferably 4 or more and 7.5 or less. The pH of the composition at 25°C can be measured by the method described in the examples.

[0083] <Viscosity> The viscosity of the composition of the present invention at 25°C is preferably 1 mPa·s or more, more preferably 1.04 mPa·s or more, and even more preferably 1.08 mPa·s or more, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter period of time; and from the viewpoint of ease of penetration from the spiracles to the inside of the trachea and further to the thorax and head of harmful arthropods, and ease of scattering or spraying the composition, the viscosity is preferably 5 mPa·s or less, more preferably 3 mPa·s or less, even more preferably 2 mPa·s or less, even more preferably 1.5 mPa·s or less, and even more preferably 1.3 mPa·s or less. The viscosity of the composition of the present invention at 25°C is preferably from 1 mPa·s to 5 mPa·s, more preferably from 1 mPa·s to 3 mPa·s, even more preferably from 1.04 mPa·s to 2 mPa·s, even more preferably from 1.04 mPa·s to 1.5 mPa·s, and even more preferably from 1.08 mPa·s to 1.3 mPa·s. The viscosity of the composition at 25°C can be measured by the method described in the examples.

[0084] <Dosage Form> A preferred dosage form of the composition of the present invention is a liquid formulation that is liquid at 25° C. As a liquid formulation, the composition of the present invention can be used as is or after diluting with water or the like.

[0085] <Discharge Device> The composition of the present invention can be sprayed or dispersed, for example, against arthropod pests using a discharge device. The discharge device is preferably a device capable of discharging the liquid formulation of the composition of the present invention in the form of droplets or a mist, and examples thereof include a dispersing device and a spraying device. The droplets or mist may include foam (foam particles). The discharge device preferably comprises a container or tank for containing the composition (liquid formulation) of the present invention, a spray mechanism for spraying or dispersing the composition, and a discharge port for discharging the composition. The spray mechanism comprises a flow path communicating with the composition (liquid formulation) contained in the storage container, and the composition fed from the flow path can be pressure-fed by a piston or the like and sent to the discharge port through a narrowed opening or flow path, thereby discharging the composition in the form of droplets or a mist. The discharge port may be part of the spray mechanism, or may be a separate structure as long as it is connected to the spray mechanism. The method for pressure-fed the composition in the spray mechanism includes a non-aerosol method using a piston (including a plunger) as well as an aerosol method using a propellant such as compressed gas. From the viewpoint of targeting harmful arthropods, a non-aerosol method in which the particle size distribution of the ejected droplets of the composition is wide is preferred.

[0086] Examples of the discharge device include handheld types that can be held by hand and small, mobile types such as drones. In either case, the discharge channel direction immediately before the opening of the discharge port is preferably toward pests, from the viewpoint of discharging the composition of the present invention toward harmful arthropods. The discharge port preferably has a cylindrical discharge channel, and the inner diameter of the discharge channel is preferably 0.1 to 1 mm, more preferably 0.2 to 0.8 mm, and even more preferably 0.3 to 0.6 mm. Examples of handheld discharge devices include trigger sprayers and push-type sprayers, where discharge or spraying is performed by pulling a trigger or pressing a push button. The container or tank that contains the composition is typically made of plastic, and in handheld discharge devices, a tube such as a dip tube is inserted into the container or tank to deliver the composition to the spray mechanism. Upon pulling the trigger or pressing the push button, the composition in the cylinder region of the piston or plunger is pressure-fed to the discharge port and sprayed. When the pulled trigger or push button is returned, the cylinder region expands and the composition is drawn from the container or tank through the tube and into the cylinder. The discharge device is preferably one equipped with a piston or plunger, and from the viewpoint of miniaturizing the discharged or sprayed particles, a pressure-accumulating type in which a certain amount of the pressure-fed composition is accumulated just before the discharge port is more preferable. The capacity of the container or tank that contains the composition is not particularly limited, but from the viewpoint of discharging or spraying toward harmful arthropods, it is, for example, 50 mL or more and 10 L or less.

[0087] From the viewpoint of obtaining a high lethal effect against harmful arthropods in a short period of time, the amount of the composition of the present invention discharged by the discharge device per discharge is preferably 0.1 g to 5.0 g, more preferably 0.3 to 3.0 g, even more preferably 0.5 to 2.5 g, still more preferably 0.7 g to 2.0 g, and even more preferably 0.9 g to 1.5 g.

[0088] The ejection time of the composition of the present invention by the ejection device (the time from the start of ejection of the composition to the end of ejection) is preferably 0.05 to 5 seconds, more preferably 0.1 to 3 seconds, even more preferably 0.2 to 2 seconds, still more preferably 0.3 to 1.5 seconds, and even more preferably 0.5 to 1 second, from the viewpoint of obtaining a high lethal effect against harmful arthropods in a shorter time.

[0089] [Method for Controlling Harmful Arthropods] The present invention further provides a method for controlling harmful arthropods (hereinafter also referred to as the "method of the present invention"), comprising the step of contacting the composition of the present invention with harmful arthropods. Examples of methods for contacting the composition of the present invention with harmful arthropods include spraying or sprinkling the composition of the present invention toward the harmful arthropods in a space where the harmful arthropods are present, or toward the harmful arthropods on agricultural or horticultural plants. For example, the composition is sprayed or sprinkled by discharging the composition from the discharge port of the aforementioned discharge device toward the harmful arthropods. Preferred embodiments of the discharge amount and discharge time of the composition of the present invention by the discharge device are as described above. For handheld discharge devices, a single spray is performed by pulling the trigger in the case of a trigger spray, or by pressing the push button in the case of a push type. From the viewpoint of being held in the hand and used, trigger sprays and push types are preferred, and trigger sprays are more preferred from the viewpoint of ease of single spraying and repeated spraying. Furthermore, from the viewpoint of being held in the hand and discharging toward harmful arthropods, it is preferable that the handheld discharging device has a discharge port on the side when held in the hand, and a discharge flow path formed toward the side. For small, mobile discharging devices such as drones, the discharge port may be opened by turning on a switch and spraying during flight, or may be equipped with various known spray mechanisms. The small, mobile discharging device may be mounted on a small airplane as well as a means of transportation such as a drone. From the viewpoint of spraying toward harmful arthropods during flight, it is preferable that the discharge port of the small, mobile discharging device has an opening located on the bottom.

[0090] In relation to the above-mentioned embodiment, the present invention further discloses the following spray composition for controlling arthropods.

[0091] <1> A pest arthropod control composition containing the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of nonionic surfactants (a11) and oily components (a12), having a solubility X in water at 25°C of 5 g / kg or less, and, when the solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C is Yg / kg, Y / X is 1.2 or more; and (B1) a surfactant including an ionic surfactant (b1), wherein the mass ratio of component (B1) to component (A1) in the composition, [(B1) / (A1)], is 4 or more and 30 or less.

[0092] <2> The content of the component (A1) is preferably 0.001% by mass or more and 10% by mass or less, more preferably 0.002% by mass or more and 8% by mass or less, even more preferably 0.003% by mass or more and 6% by mass or less, even more preferably 0.005% by mass or more and 5% by mass or less, even more preferably 0.01% by mass or more and 3% by mass or less, even more preferably 0.02% by mass or more and 2% by mass or less, even more preferably 0.02% by mass or more and 1.5% by mass or less, and even more preferably 0.04% by mass or more and 1.2% by mass or less. % by mass or less, more preferably 0.04% by mass or more and 1% by mass or less, even more preferably 0.04% by mass or more and 0.8% by mass or less, even more preferably 0.06% by mass or more and 0.6% by mass or less, even more preferably 0.06% by mass or more and 0.5% by mass or less, even more preferably 0.07% by mass or more and 0.4% by mass or less, even more preferably 0.07% by mass or more and 0.3% by mass or less, even more preferably 0.07% by mass or more and 0.2% by mass or less. The pest arthropod control composition according to <1>. <3> The pest arthropod control composition according to <1> or <2>, wherein the solubility X (g / kg) of the component (A1) in water at 25°C is 5 g / kg or less, preferably 0.001 g / kg or more and 5 g / kg or less, more preferably 0.01 g / kg or more and 4 g / kg or less, more preferably 0.03 g / kg or more and 3.5 g / kg or less, and even more preferably 0.1 g / kg or more and 3.5 g / kg or less. <4> The pest arthropod control composition according to any one of <1> to <3>, wherein the solubility Y (g / kg) of the component (A1) in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C is preferably 0.035 g / kg or more and 100 g / kg or less, more preferably 0.05 g / kg or more and 50 g / kg or less, more preferably 0.07 g / kg or more and 10 g / kg or less, even more preferably 0.1 g / kg or more and 10 g / kg or less, and still more preferably 0.5 g / kg or more and 5 g / kg or less. <5> The pest arthropod control composition according to any one of <1> to <4>, wherein the Y / X ratio of the component (A1) is 1.2 or more, preferably 1.2 or more and 100 or less, more preferably 2 or more and 50 or less, more preferably 2 or more and 30 or less, even more preferably 4 or more and 10 or less, and still more preferably 4 or more and 4.5 or less.<6> The pest arthropod control composition according to any one of <1> to <5>, wherein the nonionic surfactant (a11) preferably comprises one or more selected from the group consisting of polyoxyalkylene alkyl ethers and alkyl glyceryl ethers, more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, and even more preferably 2-ethylhexyl glyceryl ether. <7> The pest arthropod-controlling composition according to any one of <1> to <5>, wherein the oil component (a12) preferably comprises one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms, more preferably an alcohol having 8 or more carbon atoms, even more preferably a monohydric or dihydric alcohol having 8 to 22 carbon atoms, still more preferably a monohydric alcohol having 8 to 22 carbon atoms, even more preferably a monohydric alcohol having 8 to 18 carbon atoms, still more preferably a monohydric alcohol having 8 to 14 carbon atoms, even more preferably a monohydric alcohol having 8 to 12 carbon atoms, and even more preferably a monohydric alcohol having 8 to 9 carbon atoms. <8> The pest arthropod-controlling composition according to any one of <1> to <7>, wherein the ionic surfactant (b1) preferably comprises one or more selected from the group consisting of anionic surfactants, cationic surfactants, and amphoteric surfactants.<9> The ionic surfactant (b1) preferably includes one or more selected from the group consisting of cationic surfactants and amphoteric surfactants, or one or more anionic surfactants selected from the group consisting of alkyl or alkenyl sulfates, alkyl or alkenyl ether sulfates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, N-acylamino acid salts, alkyl sulfosuccinates, alkyl sulfonates, α-olefin sulfonates, internal olefin sulfonates, alkylbenzene sulfonates, α-sulfofatty acid methyl ester salts, acylmethyl taurine salts, and alkyl phosphates, each of which has an alkyl or alkenyl group and a fatty acid having from 8 to 22 carbon atoms. The pest control composition according to any one of <1> to <7>, which contains an agent, more preferably one or more selected from the group consisting of alkyl ether sulfates, alkyl sulfates, saturated fatty acid salts, alkyl sulfosuccinate ester salts, benzalkonium chloride, alkyldimethylamine oxide, and fatty acid amidopropyl betaine, each of which has an alkyl group or fatty acid with 8 to 22 carbon atoms, and even more preferably one or more selected from the group consisting of polyoxyethylene lauryl ether sodium sulfate, sodium lauryl sulfate, sodium laurate, dioctyl sodium sulfosuccinate, benzalkonium chloride, lauryldimethylamine oxide, and lauric acid amidopropyl betaine. <10> The pest control composition according to any one of <1> to <9>, wherein the mass ratio of component (B1) to component (A1) [(B1) / (A1)] is 4 to 30, preferably 4 to 25, more preferably 4 to 20, even more preferably 4 to 15, still more preferably 4 to 12, and even more preferably 4 to 10.<11> The content of the component (B1) is preferably 0.004% by mass or more and 30% by mass or less, more preferably 0.008% by mass or more and 20% by mass or less, even more preferably 0.01% by mass or more and 10% by mass or less, still more preferably 0.02% by mass or more and 5% by mass or less, still more preferably 0.04% by mass or more and 3% by mass or less, still more preferably 0.08% by mass or more and 2% by mass or less, still more preferably 0.1% by mass or more and 1.5% by mass or less, still more preferably 0.2% by mass or more and 1% by mass or less, and still more preferably 0.24% by mass or more and 1% by mass or less, the pest arthropod control composition according to any one of <1> to <10>. <12> The pest arthropod-controlling composition according to any one of <1> to <11>, wherein the total content of the component (A1) and the component (B1) is preferably 0.005% by mass to 40% by mass, more preferably 0.01% by mass to 30% by mass, even more preferably 0.02% by mass to 20% by mass, even more preferably 0.05% by mass to 10% by mass, even more preferably 0.1% by mass to 5% by mass, even more preferably 0.2% by mass to 2% by mass, even more preferably 0.25% by mass to 1.5% by mass, even more preferably 0.3% by mass to 1.2% by mass, even more preferably 0.32% by mass to 1.2% by mass, even more preferably 0.36% by mass to 1% by mass, and even more preferably 0.4% by mass to 1% by mass. <13> The pest arthropod-controlling composition according to any one of <1> to <12>, further comprising, as component (C1), an alcohol having 4 or less carbon atoms. <14> The pest arthropod control composition according to <13>, wherein the content of the component (C1) is preferably 1% by mass or more and 80% by mass or less, more preferably 3% by mass or more and 60% by mass or less, even more preferably 5% by mass or more and 40% by mass or less, still more preferably 5% by mass or more and 20% by mass or less, and even more preferably 5% by mass or more and 10% by mass or less. <15> The pest arthropod control composition according to <13> or <14>, wherein the mass ratio of the component (C1) to the component (A1) [(C1) / (A1)] is preferably 5 or more and 500 or less, more preferably 10 or more and 300 or less, even more preferably 30 or more and 200 or less, and still more preferably 60 or more and 100 or less.<16> The pest arthropod-controlling composition according to any one of <13> to <15>, wherein the ratio of the total content of component (B1) and component (C1) to the mass of component (A1) [((B1) + (C1)) / (A1)] is preferably from 5 to 500, more preferably from 10 to 300, even more preferably from 30 to 200, and still more preferably from 60 to 100. <17> The pest arthropod-controlling composition according to any one of <1> to <16>, further containing a fragrance as component (D). <18> The pest arthropod-controlling composition according to any one of <1> to <17>, further containing water. <19> The pest arthropod control composition according to <18>, wherein the water content is preferably 50% by mass or more and 99.8% by mass or less, more preferably 60% by mass or more and 99.8% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.7% by mass or less, still more preferably 85% by mass or more and 99.7% by mass or less, still more preferably 90% by mass or more and 99.7% by mass or less, and still more preferably 95% by mass or more and 99.7% by mass or less.

[0093] <20> A pest arthropod control composition comprising the following component (A2) and component (B2): (A2) one or more selected from the group consisting of a nonionic surfactant (a21) and an oily component (a22), the solubility X in water at 25°C of 5 g / kg or less, and (B2) a nonionic surfactant other than the component (a21), wherein the composition further contains water, the mass ratio of the component (B2) to the component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less, the total content of the components (A2) and (B2) in the composition is 0.15 mass% or more, and the component (A2) is in a dissolved state in the composition.

[0094] <21> The content of the component (A2) is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.02% by mass or more and 8% by mass or less, even more preferably 0.02% by mass or more and 6% by mass or less, even more preferably 0.04% by mass or more and 5% by mass or less, even more preferably 0.04% by mass or more and 3% by mass or less, even more preferably 0.04% by mass or more and 2% by mass or less, even more preferably 0.04% by mass or more and 1.5% by mass or less, and even more preferably 0.05% by mass or more and 1.2% by mass or less. The pest arthropod control composition according to <20>, wherein the component (A2) has a solubility X (g / kg) in water at 25°C of 5 g / kg or less, preferably 0.001 g / kg or more and 5 g / kg or less, more preferably 0.01 g / kg or more and 4 g / kg or less, and more preferably 0.1 g / kg or more and 3.5 g / kg or less.<23> The pest arthropod control composition according to any one of <20> to <22>, wherein the nonionic surfactant (a21) preferably comprises one or more selected from the group consisting of polyoxyalkylene alkyl ethers and alkyl glyceryl ethers, more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, even more preferably one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less, still more preferably one or more selected from the group consisting of polyoxypropylene alkyl ethers, 2-ethylhexyl glyceryl ethers, and isodecyl glyceryl ethers, and even more preferably 2-ethylhexyl glyceryl ether. <24> The pest arthropod-controlling composition according to any one of <20> to <23>, wherein the oily component (a22) preferably comprises one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms, more preferably an alcohol having 8 or more carbon atoms, and even more preferably a monohydric alcohol having 8 to 9 carbon atoms. <25> The pest arthropod-controlling composition according to any one of <20> to <24>, wherein the component (B2) preferably comprises a polyoxyethylene alkyl ether having an average number of added moles of ethylene oxide (EO) exceeding 3, more preferably one or more selected from the group consisting of polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene 2-hexyldecyl ether, each having an average number of added moles of ethylene oxide (EO) exceeding 3, and even more preferably polyoxyethylene lauryl ether having an average number of added moles of ethylene oxide (EO) of 4 to 60.<26> The pest arthropod control composition according to any one of <20> to <25>, wherein the mass ratio of the component (B2) to the component (A2) [(B2) / (A2)] is 4 or more and 30 or less, preferably 4 or more and 25 or less, more preferably 4 or more and 20 or less, even more preferably 4 or more and 15 or less, still more preferably 4 or more and 12 or less, still more preferably 4 or more and 10 or less, still more preferably 4 or more and 8 or less, and still more preferably 4 or more and 5 or less. <27> The pest arthropod control composition according to any one of <20> to <26>, wherein the content of the component (B2) is preferably 0.04% by mass or more and 30% by mass or less, more preferably 0.08% by mass or more and 20% by mass or less, even more preferably 0.08% by mass or more and 10% by mass or less, even more preferably 0.1% by mass or more and 5% by mass or less, even more preferably 0.1% by mass or more and 3% by mass or less, even more preferably 0.2% by mass or more and 2% by mass or less, even more preferably 0.2% by mass or more and 1.5% by mass or less, even more preferably 0.24% by mass or more and 1% by mass or less, and even more preferably 0.24% by mass or more and 0.5% by mass or less. <28> The pest arthropod control composition according to any one of <20> to <27>, wherein the total content of the component (A2) and the component (B2) is 0.15% by mass or more, preferably 0.15% by mass or more and 40% by mass or less, more preferably 0.15% by mass or more and 30% by mass or less, even more preferably 0.15% by mass or more and 20% by mass or less, even more preferably 0.15% by mass or more and 10% by mass or less, even more preferably 0.2% by mass or more and 5% by mass or less, even more preferably 0.2% by mass or more and 2% by mass or less, even more preferably 0.2% by mass or more and 1.5% by mass or less, even more preferably 0.2% by mass or more and 1.2% by mass or less, even more preferably 0.25% by mass or more and 1% by mass or less, even more preferably 0.25% by mass or more and 0.8% by mass or less, and even more preferably 0.25% by mass or more and 0.7% by mass or less. <29> The pest arthropod control composition according to any one of <20> to <28>, further containing an alcohol having 4 or less carbon atoms as a component (C2).<30> The pest arthropod-controlling composition according to <29>, wherein the content of the component (C2) is preferably 1% by mass or more and 80% by mass or less, more preferably 1% by mass or more and 60% by mass or less, even more preferably 3% by mass or more and 40% by mass or less, still more preferably 3% by mass or more and 20% by mass or less, still more preferably 5% by mass or more and 10% by mass or less, and still more preferably 5% by mass or more and 8% by mass or less. <31> The pest arthropod-controlling composition according to <29> or <30>, wherein the mass ratio of the component (C2) to the component (A2) [(C2) / (A2)] is preferably 10 or more and 300 or less, more preferably 30 or more and 200 or less, and even more preferably 60 or more and 100 or less. <32> The pest arthropod-controlling composition according to any one of <29> to <31>, wherein the ratio of the total content of component (B2) and component (C2) to the mass of component (A2) [((B2) + (C2)) / (A2)] is preferably 10 or more and 300 or less, more preferably 30 or more and 200 or less, and even more preferably 60 or more and 100 or less. <33> The pest arthropod-controlling composition according to any one of <20> to <32>, further comprising a fragrance as component (D). <34> The pest arthropod-controlling composition according to any one of <20> to <33>, wherein the water content is preferably 50% by mass or more and 99.95% by mass or less, more preferably 60% by mass or more and 99.95% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.8% by mass or less, and even more preferably 90% by mass or more and 99.7% by mass or less. <35> The pest arthropod control composition according to any one of <20> to <34>, wherein the total content of the water and component (C2) is preferably 50% by mass or more and 99.95% by mass or less, more preferably 60% by mass or more and 99.95% by mass or less, even more preferably 70% by mass or more and 99.8% by mass or less, still more preferably 80% by mass or more and 99.8% by mass or less, and still more preferably 90% by mass or more and 99.7% by mass or less.

[0095] <36> The pest arthropod control composition according to any one of <1> to <35>, wherein the content of the insecticidal component is preferably less than 1% by mass, more preferably 0.1% by mass or less, more preferably 0.01% by mass or less, even more preferably 0.001% by mass or less, and still more preferably substantially 0% by mass. <37> The pest arthropod control composition according to any one of <1> to <36>, wherein the pH of the composition at 25°C is preferably 10 or less, more preferably 3 or more and 10 or less, more preferably 3.5 or more and 8 or less, and even more preferably 4 or more and 7.5 or less. <38> The pest arthropod-controlling composition according to any one of <1> to <37>, wherein the viscosity of the composition at 25°C is preferably from 1 mPa·s to 5 mPa·s, more preferably from 1 mPa·s to 3 mPa·s, even more preferably from 1.04 mPa·s to 2 mPa·s, even more preferably from 1.04 mPa·s to 1.5 mPa·s, and even more preferably from 1.08 mPa·s to 1.3 mPa·s. <39> The pest arthropod-controlling composition according to any one of <1> to <38>, wherein the pest arthropod is preferably an arthropod having a spiracles, more preferably an insect, a crustacean, a spider, or a centipede. <40> The pest arthropod-controlling composition according to any one of <1> to <39>, wherein the pest arthropod-controlling composition is preferably a composition that can penetrate from the spiracles to the inside of the trachea and further to the head of the pest arthropod.

[0096] <41> A method for controlling arthropod pests, comprising a step of contacting arthropod pests with the arthropod pest control composition according to any one of <1> to <40>. <42> The method for controlling arthropod pests according to <41>, wherein the contacting method is preferably a method of spraying or dusting the arthropod pest control composition toward a space where the arthropod pests are present, or toward arthropod pests on agricultural crops or horticultural plants. <43> Use of the composition according to any one of <1> to <40> as an arthropod pest control composition.

[0097] The present invention will be described below with reference to examples, but is not limited to the scope of the examples. In the examples, various evaluations and measurements were carried out by the following methods.

[0098] (pH) The pH of the pest arthropod control composition was measured at 25° C. using a pH meter (electrode: 6367-10D (manufactured by Horiba Ltd.)).

[0099] (Viscosity) The viscosity of the pest arthropod control composition was measured at 25° C. using a viscometer TVB-10M (manufactured by Toki Sangyo Co., Ltd.) with a low viscosity adapter or rotor No. 4 at 60 rpm.

[0100] (Knockdown rate after 2 minutes) Ten mosquitoes were placed in an acrylic box (6 x 6 x 4 cm) covered on both sides with mesh cloth (nylon, 15D, mesh shape: hexagonal, mesh size: 1.5 mm). The mosquitoes resting on the mesh were sprayed once with each pest arthropod control composition from a trigger spray container (trigger type: pressure-accumulating, volume: 370 mL, nozzle diameter: 0.8 mm, discharge rate: 0.9 g / spray) from a distance of 40 cm (see Figure 1). If a mosquito fell onto its back or side and was unable to maintain flight after being lightly tapped on the acrylic box, the mosquito was recorded as having been knocked down. The number of knocked down mosquitoes was counted 2 minutes after spraying the composition, and the knockdown rate was calculated as the number of knocked down mosquitoes divided by 10 x 100 (%).

[0101] (Appearance) Approximately 100 mL of the pest arthropod control composition described in Table 3 was filled into a Labolan screw tube bottle No. 8 (a glass bottle with a capacity of 110 mL, inner mouth diameter x body diameter x height (mm) = 20.3 x 40 x 120) manufactured by AS ONE Corporation, and the appearance was visually observed at room temperature (25 ° C.). Clear and transparent compositions were evaluated as "A", and compositions with turbidity were evaluated as "C". Those rated "A" were determined to be in a state in which component (A2) was dissolved in the composition.

[0102] Examples 1 to 17 and Comparative Examples 1 to 11 (Preparation and Evaluation of Harmful Arthropod Control Composition 1) The components shown in Tables 1 and 2 were blended and mixed with a stirrer to prepare Harmful Arthropod Control Composition 1 of the first invention. The amounts shown in Tables 1 and 2 are the active ingredient amounts (mass%) of each component. Using the obtained compositions, pH and viscosity were measured by the above-mentioned methods. In addition, the prepared compositions were filled into the above-mentioned trigger spray container to prepare sprays. Using the obtained sprays, knockdown rates were evaluated by the above-mentioned methods. The above evaluation results are shown in Tables 1 and 2.

[0103]

[0104]

[0105] Examples 18 to 21 and Comparative Examples 12 to 17 (Preparation and Evaluation of Harmful Arthropod Control Composition 2) The components shown in Table 3 were blended and mixed with a stirrer to prepare Harmful Arthropod Control Composition 2 of the second invention. The amounts listed in Table 3 are the active ingredient amounts (mass%) of each component. Using the obtained compositions, appearance evaluation and pH and viscosity measurements were carried out according to the methods described above. The prepared compositions were also filled into the trigger spray container to prepare sprays. The obtained sprays were used to evaluate the knockdown rate according to the method described above. The evaluation results are shown in Table 3.

[0106]

[0107] The components listed in the table are as follows: (Components (A1), (A2)) PENETOL GE-EH: 2-ethylhexyl glyceryl ether (manufactured by Kao Corporation), solubility X in water at 25°C: 3 g / kg, solubility Y in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C: 6 g / kg or more, Y / X≧2 PENETOL GE-ID: isodecyl glyceryl ether (manufactured by Kao Corporation), solubility X in water at 25°C: 0.02 g / kg or less, solubility Y in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C: 0.08 g / kg, Y / X≧4 KAO SOFCARE GP-1: PPG-3 caprylyl ether (manufactured by Kao Corporation), solubility X in water at 25°C: 0.02 g / kg or less, solubility Y in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C: 0.1 g / kg, Y / X≧5. KALCOL 0898: n-octyl alcohol (manufactured by Kao Corporation), solubility X in water at 25°C: 0.3 g / kg, solubility Y in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C: 0.39 g / kg, Y / X=1.3

[0108] (Constituents of component (B1), component (B2)) (b1) Dioctyl sodium sulfosuccinate (manufactured by Tokyo Chemical Industry Co., Ltd.) (b1) EMAL 0: Sodium lauryl sulfate (manufactured by Kao Corporation) (b1) EMAL 270J: Polyoxyethylene (2) sodium lauryl ether sulfate (manufactured by Kao Corporation) (b1) SANIZOL C: Benzalkonium chloride (manufactured by Kao Corporation) (b1) AMPHITOL 20N: Lauryl dimethylamine oxide (manufactured by Kao Corporation) (b1) Sodium laurate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) (b1) AMPHITOL 20AB: Lauryl amidopropyl betaine (manufactured by Kao Corporation) (B2) EMULGEN 108: Polyoxyethylene (6) lauryl ether (Kao Corporation), solubility in water at 25°C: 150 g / kg or more

[0109] It can be seen from Tables 1 to 3 that the pest control composition of the present invention has a high knockdown rate of pests in as little as two minutes. In addition, there is no problem with the appearance of residue after drying.

[0110] In addition, using the compositions of Example 3 and Comparative Example 1, whether or not the composition had penetrated into the mosquito head was confirmed by the following method. A dye (Blue No. 1) was added to each composition so that the concentration in the composition was 0.03% by mass, to prepare a colored composition. 200 μL of the colored composition was dropped onto the spiracles of pest arthropods. These procedures were carried out under microscope observation, with the abdomen of a mosquito that had been previously subjected to low-temperature treatment to bring it into a state of suspended animation fixed to an insect pin using a UV-curable resin to restrict its movement. After 2 minutes, if the internal trachea at the junction of the mosquito's head and thorax was observed to be blue under the microscope, it was determined that the composition had penetrated into the mosquito's head.

[0111] Figure 2 shows microscope images of the internal trachea at the junction of the head and thorax of a mosquito when no composition was used, Figure 3 shows images when the composition of Example 3 was used, and Figure 4 shows images when the composition of Comparative Example 1 was used. In Figure 3, blue streaks of coloration were observed extending diagonally downward to the right from the tips of the two arrows. In contrast, no coloration was observed in either Figure 2 or Figure 4.

[0112] Furthermore, this embodiment discloses the following formulation examples. Components (A1), (B1), and (C1) shown in Tables 4 to 11 are the same as described above. As component (D) shown in Tables 4 to 11, either a fragrance shown in Table 12 or a fragrance composition shown in Table 13 is blended.

[0113]

[0114]

[0115]

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122]

[0123] According to the present invention, it is possible to provide a pest arthropod control composition that can achieve a high lethal effect on pest arthropods in a shorter period of time.

Claims

1. A pest arthropod control composition comprising the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of nonionic surfactants (a11) and oily components (a12), having a solubility X in water at 25°C of 5 g / kg or less, and, where Yg / kg is the solubility in a 0.05% by mass aqueous solution of sodium lauryl sulfate at 25°C, Y / X is 1.2 or more; and (B1) a surfactant including an ionic surfactant (b1), wherein the mass ratio of component (B1) to component (A1) in the composition [(B1) / (A1)] is 4 or more and 30 or less.

2. A pest arthropod control composition comprising the following components (A2) and (B2): (A2) one or more selected from the group consisting of nonionic surfactants (a21) and oily components (a22), each having a solubility X in water at 25°C of 5 g / kg or less; and (B2) a nonionic surfactant other than component (a21), wherein the composition further contains water; the mass ratio of component (B2) to component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less; the total content of components (A2) and (B2) in the composition is 0.15 mass% or more; and component (A2) is in a dissolved state in the composition.

3. A pest arthropod control composition as described in claim 1, wherein the content of component (A1) in the composition is 0.001 mass% or more and 10 mass% or less.

4. A pest arthropod control composition as described in claim 2, wherein the content of component (A2) in the composition is 0.001 mass% or more and 10 mass% or less.

5. A pest arthropod control composition according to claim 1, wherein the nonionic surfactant (a11) comprises one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less.

6. A pest arthropod control composition according to claim 1, wherein the oily component (a12) comprises one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms.

7. The pest arthropod control composition according to claim 1, wherein the ionic surfactant (b1) comprises one or more selected from the group consisting of cationic surfactants and amphoteric surfactants.

8. The arthropod pest control composition according to claim 1, wherein the ionic surfactant (b1) comprises one or more anionic surfactants selected from the group consisting of alkyl or alkenyl sulfates, alkyl or alkenyl ether sulfates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, N-acylamino acid salts, alkyl sulfosuccinates, alkyl sulfonates, α-olefin sulfonates, internal olefin sulfonates, alkylbenzene sulfonates, α-sulfofatty acid methyl ester salts, acylmethyl taurine salts, and alkyl phosphates, each of which has an alkyl or alkenyl group and a fatty acid having from 8 to 22 carbon atoms.

9. A pest arthropod control composition according to claim 2, wherein the nonionic surfactant (a21) comprises one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, and alkyl glyceryl ethers, each having an average number of moles of ethylene oxide (EO) added of 3 or less.

10. A pest arthropod control composition according to claim 2, wherein the oily component (a22) comprises one or more selected from the group consisting of alcohols and esters having 8 or more carbon atoms.

11. The arthropod pest control composition according to claim 2, wherein component (B2) comprises a polyoxyethylene alkyl ether having an average number of moles of ethylene oxide (EO) added of more than 3.

12. The arthropod pest control composition according to claim 1, further comprising water.

13. A pest arthropod control composition according to any one of claims 1 to 12, wherein the viscosity of the composition at 25°C is 1 mPa·s or more and 5 mPa·s or less.

14. A pest control composition according to any one of claims 1 to 13, wherein the pH of the composition at 25°C is 10 or less.

15. A pest arthropod control composition according to any one of claims 1 to 14, wherein the content of the insecticidal component is less than 1% by mass.

16. A pest arthropod control composition according to any one of claims 1 to 15, wherein the pest arthropod is an arthropod having a spiracles.

17. The arthropod pest control composition according to claim 16, wherein the composition has the ability to penetrate from the spiracles to the inside of the trachea and further to the head of the arthropod pest.

18. A method for controlling arthropod pests, comprising the step of contacting the composition of claim 1 or 2 with arthropod pests.

19. A composition containing the following components (A1) and (B1): (A1) one or more surfactants selected from the group consisting of nonionic surfactants (a11) and oily components (a12), whose solubility in water at 25°C, X, is 5 g / kg or less, and whose solubility in a 0.05 mass% aqueous sodium lauryl sulfate solution at 25°C, Y / X, is 1.2 or more, where Yg / kg is the solubility, and (B1) a surfactant including an ionic surfactant (b1), wherein the mass ratio of component (B1) to component (A1) in the composition, [(B1) / (A1)], is 4 or more and 30 or less, 20. A composition comprising the following components (A2) and (B2): (A2) one or more selected from the group consisting of nonionic surfactants (a21) and oily components (a22), each having a solubility X in water at 25°C of 5 g / kg or less, and (B2) a nonionic surfactant other than component (a21), wherein the composition further contains water, the mass ratio of component (B2) to component (A2) in the composition [(B2) / (A2)] is 4 or more and 30 or less, the total content of components (A2) and (B2) in the composition is 0.15 mass% or more, and component (A2) is in a dissolved state in the composition, and use of the composition as a composition for controlling arthropod pests.

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