Fumigant composition and method for exterminating pests using the same

Abstract

To provide a fumigant composition that exhibits high efficacy in exterminating pests, and a method for exterminating pests using the same.SOLUTION: A fumigant composition comprises: (A) two or more pest extermination components; and (B) 60 to 80% of an organic foaming agent, wherein the mass ratio (B) / (A) of the component (B) to the component (A) is from 15 to 50.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a fumigant composition and a method for exterminating pests using the same. [Background technology]

[0002] To eradicate harmful organisms, it is expected that the product will have both rapid effectiveness, which means that the eradication effect appears early, and residual effectiveness (lethality), which means that the eradication effect lasts for a long period of time.

[0003] For example, Patent Document 1 describes a control / insecticidal composition containing methoxadiazone and a pyrethroid compound as insecticidal ingredients. However, there is a demand for further improvement in the effect of exterminating pests. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-28173 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a fumigant composition that is excellent in all aspects of pest control effects, particularly in terms of volatilization rate, insecticidal efficacy, and usability, and a pest control method using the same. Another object of the present invention is to provide a fumigant composition that is not only excellent in volatilization rate, insecticidal efficacy, and usability, but also has both immediate and residual effects in terms of insecticidal efficacy, and a pest control method using the same. [Means for solving the problem]

[0006] That is, the present invention relates to the following [1] to [7]. [1] A fumigant composition comprising two or more pest-controlling components as component (A) and 60-80% of an organic foaming agent as component (B), in which the mass ratio of component (A) to component (B), (B) / (A), is 15-50. [2] The fumigant composition according to [1], wherein the component (A) comprises one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2). [3] The fumigant composition according to [2], wherein the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.1 to 2.0. [4] The fumigant composition according to [2] or [3], wherein compound (a1) is one or more compounds selected from d·dT-cyphenothrin and fenothrin, and compound (a2) is one or more compounds selected from dichlorvos, indoxacarb, and broflanilide. [5] The fumigant composition according to any one of [1] to [3], wherein the component (B) contains azodicarbonamide. [6] The fumigant composition according to any one of [1] to [5], wherein the pests to be controlled are one or more selected from cockroaches, stink bugs, maize weevils, and pill bugs. [7] A method for exterminating pests, which uses the fumigant composition described in any one of [1] to [6]. Effect of the Invention

[0007] INDUSTRIAL APPLICABILITY The present invention makes it possible to provide a fumigant composition having excellent pest extermination effects, and a pest extermination method using the same. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing an example of a smoking device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be described below with reference to specific embodiments, but it will be understood that the present invention is not limited to these embodiments, and that various changes and modifications therein can be made by those skilled in the art without departing from the scope or spirit of the present invention as defined in the appended claims. In this specification, "%" refers to "mass %" unless otherwise specified.

[0010] When using the fumigant composition of the present invention to actually control, exterminate, or kill pests, a water-type smoke-type insecticide device described below can be used. However, other smoke-type insecticide devices such as a grinding plate type smoke-type insecticide device can also be used.

[0011] The fumigant composition of the present invention contains two or more pest-controlling components as component (A). By containing two or more pest-controlling components, it becomes possible to achieve both the quick-acting effect (knockdown) described below and the residual effect (lethality) described below.

[0012] The fumigant composition of the present invention contains 60 to 80% of an organic foaming agent as component (B). Alternatively, the content of the organic foaming agent can be 65% or more, or 70% or more and 80% or less, 75% or less, or 73% or less. If the content of the organic foaming agent is equal to or more than the lower limit, the volatilization rate of the pest control component (A), which will be described later, is high, i.e., the pest control component is easily volatilized efficiently, while if the content is equal to or less than the upper limit, the amount of decomposition products of the organic foaming agent scattered is reduced, making it less likely to contaminate the space to be treated.

[0013] In the fumigant composition of the present invention, the mass ratio (B) / (A) of the component (A) to the component (B) is 15 to 50. Alternatively, the mass ratio (B) / (A) of the component (A) to the component (B) can be 15 or more, or 17 or more, and 40 or less, 35 or less, 30 or less, or 25 or less. If the mass ratio (B) / (A) is the lower limit or more, the volatilization rate can be increased, and if it is the upper limit or less, good usability can be obtained, which will be described later. In addition, in the fumigant composition of the present invention, the component (A) preferably contains one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2), because this makes it possible to achieve both rapid action (knockdown) and residual action (lethality).

[0014] Furthermore, in the fumigant composition of the present invention, the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably 0.1 to 2.0. Alternatively, the mass ratio (a1) / (a2) may be 0.1 or more, or 0.2 or more, and 1.5 or less, 1.0 or less, 0.8 or less, or 0.5 or less. This is because if the mass ratio (a1) / (a2) is below the lower limit, the volatilization rate of the non-pyrethroid compound (a2) component decreases, and if it exceeds the upper limit, the volatilization rate of the pyrethroid compound (a1) component decreases.

[0015] In the fumigant composition of the present invention, it is preferable that compound (a1) contains one or more compounds selected from d·dT-cyphenothrin and fenothrin, and compound (a2) contains one or more compounds selected from dichlorvos, indoxacarb, and broflanilide. Furthermore, the component (B) in the fumigant composition of the present invention preferably contains azodicarbonamide.

[0016] The fumigant composition of the present invention is particularly effective against pests such as cockroaches, stink bugs, maize weevils, and pillbugs, for which conventional insecticides have not necessarily been sufficiently effective, and can control, exterminate, and kill these pests.

[0017] (About smoking-type insecticide devices) The smoking type insecticide device contains the smoking type insecticide of the present invention and is equipped with a heating means for heating the smoking type insecticide. The smoking type insecticide is vigorously vaporized into the space, and is a so-called spray type smoking type insecticide device. FIG. 1 is a cross-sectional view showing one embodiment of a fumigation type insect killing device of the present invention. The smoke-type insecticide device 1 shown in Fig. 1 is generally composed of an outer container 10, an inner container 20 provided inside the outer container 10, a heat generating section 30 as a heating means provided between the outer container 10 and the inner container 20, and a smoke-type insecticide 40 accommodated in the inner container 20. The center of the inner bottom surface of the inner container 20 is the inner bottom center section 22. As the smoke-type insecticide 40, the smoke-type insecticide of the present invention can be used.

[0018] The heat generating portion 30 is formed by filling it with a substance (such as calcium oxide) that generates heat when it comes into contact with water. Although an example in which a substance that generates heat when in contact with water is filled has been shown here, the present invention is not limited to this. For example, a partition material may be placed in the heat generating section 30 to form a plurality of independent compartments, and each compartment may be filled with a metal and a metal oxide or an oxidizer that has a smaller ionization tendency than the metal.

[0019] The inner container 20 functions as a container for storing the smoke-type insecticide 40 and also functions as a heat transfer section for transferring the thermal energy generated in the heat generating section 30 to the smoke-type insecticide 40 . The material of the inner container 20 may be any material that has thermal conductivity, such as metal, plastic, paper, etc. The inner container 20 may be in contact with the heat generating section 30 or may be spaced apart from it.

[0020] The outer container 10 is composed of a body 12, a lid 14, and a bottom 16. The materials used for the main body 12, the lid 14, and the bottom 16 are heat-resistant so as not to deform due to the heat generated by the heating section 30 or the high-temperature steam generated by the smoke-type insecticide 40, and examples of such materials include metal, ceramic, and paper. The main body 12 is substantially cylindrical, with an inner diameter larger than the outer diameter of the inner container 20 and a height larger than the height of the inner container 20. This allows a gap to be formed between the side wall and the bottom wall of the inner container 20 when the inner container 20 is placed inside the outer container 10. The lid portion 14 has holes through which steam passes, and examples thereof include a mesh, a punched metal, and a lattice-shaped frame. The bottom 16 is made of a material having holes that are permeable to water but not permeable to the material that constitutes the heat generating part 30 (the material that generates heat in contact with water), such as nonwoven fabric, mesh, etc. This allows water to enter the heat generating part 30 from the bottom 16 during use, causing heat to be generated. The structure of bottom 16 is determined according to the configuration of heat generating section 30. For example, when heat generating section 30 is filled with a metal and a metal oxide or an oxidizing agent having a lower ionization tendency than the metal, bottom 16 may have a structure that is impermeable to water.

[0021] A fumigation method using the fumigation type insect killing device 1 will be described. First, the smoke-type insect killing device 1 is placed in the target space. Next, the heat generating part 30 is made to generate heat according to the mechanism of the heat generating part 30. For example, when the heat generating part 30 filled with calcium oxide is provided, the bottom part 16 of the outer container 10 is immersed in water. As a result, the water seeping in from the bottom part 16 reacts with the calcium oxide in the heat generating part 30, generating heat. The water seeping in from the bottom 16 reacts with calcium oxide in the heat generating section 30 to generate heat, which is transferred to the smoke-type insecticide 40 via the side and bottom walls of the inner container 20, causing the temperature of the smoke-type insecticide 40 to rise, causing the pest control component (A) to pass through the holes in the lid section 14 with great force and diffuse into the target space, thereby achieving an insecticidal effect. In this way, by using the fumigation type insecticidal device 1, insecticidal treatment can be carried out easily. EXAMPLES

[0022] (Test Example 1) The present invention will be specifically described below with reference to Examples and Comparative Examples as Test Example 1. First, the following describes the construction of the smoke-type insecticide device and the preparation of the smoke-type insecticide for carrying out each of the examples and comparative examples in Table 1, and further describes the evaluation items, such as the evaporation rate of the insecticidal active ingredient, the "immediate effect" of the insecticidal efficacy, the "residual effect" of the insecticidal efficacy, and the burnt odor of the smoking container.

[0023] [Table 1]

[0024] (About the creation of a smoke-type insecticide device) A fumigation-type insecticide device shown in FIG. 1 (one that does not contain a fumigation-type insecticide) was prepared, 10 g of each of the fumigation-type insecticides 40 was placed in the inner container 20 of the device, and 55 g of calcium oxide was filled in the heat generating part 30 of the device to produce a fumigation-type insecticide device having the same configuration as the fumigation-type insecticide device 1 shown in FIG. 1.

[0025] (Regarding the preparation of smoke-type insecticides) The powdered raw materials were stirred and mixed in a kneader (S5-2G type, manufactured by Moriyama Co., Ltd.). A mixed liquid prepared by stirring and mixing liquid raw materials separately was added to the kneader, and the powdered raw material mixture and the mixed liquid were mixed to obtain a mixture. The obtained mixture was granulated using a pre-extrusion granulator (EXDFS-60, manufactured by Fuji Paudal Co., Ltd.) with a die having an opening diameter of 3 mm to obtain a granulated product. The obtained granulated product was dried in a dryer (RT-120HL, manufactured by Alp Co., Ltd.) set at 70°C to obtain a granular smoke-type insecticide.

[0026] (Volatilization rate of insecticidal active ingredients) Internal volume 7.0m 3 A plastic container for water supply containing 23mL of water was placed in the center of the floor in a test room (7000L) (temperature 25±2°C, relative humidity 45±5%RH), and a smoke-type insecticide device containing each smoke-type insecticide was placed in the plastic container for water supply, and smoke treatment was started. White smoke began to be generated one minute after the smoke-type insecticide device was placed. Five minutes after the start of the generation of white smoke, the air in the test room was stirred with a fan for one minute. After stirring, 20 L of air in the test room was sucked into a recovery column using a vacuum pump, and the component (A) (pest control component) that had volatilized in the test room was adsorbed. For the recovery column, silica gel for chromatography (Wakogel C-100, manufactured by Wako Pure Chemical Industries, Ltd.) was used. Next, after the component (A) was adsorbed, acetone was passed through to elute the component (A) adsorbed on the silica gel for chromatography. Then, the amount of component (A) X (g) in the sample was quantified using the collected acetone as a sample by gas chromatography (GC) (note that when multiple components (A) are used, each component can be quantified at the same time). The volatilization rate (%) was calculated from the quantification result and the amount of component (A) Y (mass%) in the smoke-type insecticide according to the following formula. Then, the volatilization rate of the insecticidal active ingredient was evaluated according to the following evaluation criteria. The evaporation rate is Volatile rate (%)=[X(g) / 20(L)]×[100 / {10(g)×Y(mass%)}]×7000(L)×100 The calculation was made as follows. In addition, the evaluation criteria for the volatilization rate of the insecticidal active ingredient in Table 1 are as follows: ◎: Evaporation rate is 80% or more ○: Volatilization rate is 75% or more but less than 80% △: Evaporation rate is 70% or more but less than 75% ×: Volatilization rate is less than 70% It was decided.

[0027] (About the insecticidal "fast-acting" effect (knockdown effect)) Eight brown stink bugs were placed in a waist-high petri dish with a diameter of 9 cm, covered with a 100-mesh nylon mesh, and placed in two locations on the floor of a 32.0 m3 (32,000 L) test room (temperature: 25±2°C, relative humidity: 45±5% RH). A plastic water supply container containing 23 mL of water was placed in the center of the floor, and a fumigation-type insecticide device containing each of the fumigation-type insecticides was placed in the plastic water supply container. Fumigation was started, and after sealing for 2 hours, the condition of the test insects was observed immediately after opening the test room, divided into alive and lying on their backs. The immediate action of the insecticidal effect was evaluated according to the following evaluation criteria. Note that dead individuals also lie on their backs, so lying on their backs includes dead individuals. The evaluation criteria for the insecticidal effect "fast acting" in Table 1 are as follows: ◎: 100% upturn rate ○: The total rate of upturns is 80% or more but less than 100% △: The total rate of upturning is 60% or more but less than 80%. ×: Rising rate is less than 60% It was decided.

[0028] (Regarding insecticidal "residual effect (lethality)") A 9cm diameter waist-high petri dish with an internal volume of 32.0m 3 The test chambers were placed in two locations on the floor of a 32,000 L test room (temperature 25±2°C, relative humidity 45±5%RH), a plastic water supply container containing 23 mL of water was placed in the center of the floor, and the fumigation device containing each of the smoke-type insecticides was placed in the plastic water supply container, and the fumigation treatment was started. After sealing for 2 hours, the high-waisted petri dishes were taken out and eight brown marmorated stink bugs, water-soaked absorbent cotton, and about 1 g of insect jelly (Pro Jelly, KB Farm) were placed in them, and the dishes were covered with a 100-mesh nylon mesh and left to stand for one week at a temperature of 25±2°C and a relative humidity of 45±5%RH, after which the condition of the test insects was observed as alive, lying on their backs, or dead. The evaluation criteria for the insecticidal "residual effect" in Table 1 are as follows: ◎: Mortality rate is 100% ○: Mortality rate is between 80% and 100% △: Mortality rate is between 60% and 80% ×: Mortality rate is less than 60% It was decided.

[0029] (About the burnt smell from a smoking container) Internal volume 32.5m 3 A plastic water supply container filled with 23mL of water was placed in the center of the floor of a (3250L) test room (temperature 25±2°C, relative humidity 45±5%RH), and a fumigation-type insecticide device containing each example of the fumigation-type insecticide was placed in the plastic water supply container, and the fumigation treatment was started. After two hours of closed smoking, five subjects entered the test room after the smoking and evaluated the usability of the products by smelling them. The usability evaluation criteria in Table 1 are: ◯: There is no or only a slight burning smell, and it is easy to use. ×: There is a noticeable burning smell and the usability is poor. It was decided.

[0030] Regarding Examples 1 to 7 The smoke-type insecticide produced as Example 1 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 2.4 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 18.7 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance, and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 22.5. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.33.

[0031] The fumigation type insecticide of Example 1 will be examined based on each evaluation item. First, the volatilization rate was 88% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 80% for broflanilide, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80%, and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0032] The smoke-type insecticide produced as Example 2 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 4.0 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 17.1 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 15.0. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.20.

[0033] The fumigation type insecticide of Example 2 will be examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a pyrethroid compound (a1), was 84%, exceeding the evaluation standard of 80%. In addition, the volatilization rate of broflanilide, a non-pyrethroid compound (a2), was 75%, which is above the evaluation standard of 75% to less than 80%. Therefore, it is good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0034] The smoke-type insecticide produced as Example 3 contains 1.2 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 3.0 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It further contains 17.2 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 17.3. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.40.

[0035] The fumigation type insecticide of Example 3 will be examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a pyrethroid compound (a1), was 88%, exceeding the evaluation standard of 80%. In addition, the volatilization rate of broflanilide, a non-pyrethroid compound (a2), was 78%, exceeding the evaluation standard of 75% or more and less than 80%. Therefore, it is good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0036] The smoke-type insecticide produced as Example 4 contains 1.0 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 3.0 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It further contains 17.4 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 18.1. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.33.

[0037] The smoke-type insecticide of Example 4 will be examined based on each evaluation item. First, the volatilization rate was 92% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 88% for broflanilide, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80%, and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0038] The smoke-type insecticide produced as Example 5 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 3.0 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.1 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 18.9. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.27.

[0039] The fumigation type insecticide of Example 5 will be examined based on each evaluation item. First, the volatilization rate was 88% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 80% for indoxacarb, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80% and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0040] The smoke-type insecticide produced as Example 6 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 3.0 mass% dichlorvos as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.1 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 18.9. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.27.

[0041] The smoke-type insecticide of Example 6 is examined based on each evaluation item. First, the volatilization rate was 88% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 80% for dichlorvos, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80% and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, the residual insecticidal activity (lethality) is good, with the mortality rate being 80% or more and less than 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0042] The smoke-type insecticide produced as Example 7 contains 2.8 mass% fenothrin as a pyrethroid compound (a1) and 2.0 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It also contains 14.4 mass% clay as other components, and 8.3 mass% total of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 15.1. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 1.40.

[0043] The smoke-type insecticide of Example 7 is examined based on each evaluation item. First, the volatilization rate of fenothrin, a pyrethroid compound (a1), was 85%, and that of indoxacarb, a non-pyrethroid compound (a2), was 80%, both of which exceeded the evaluation standard of 80%, and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown property) is extremely good, with the rate of turning over being 80% or more but less than 100%. Furthermore, the residual insecticidal activity (lethality) is good, with the mortality rate being 80% or more and less than 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0044] Comparative Examples 1 to 7 The smoke-type insecticide produced as Comparative Example 1 contains 3.0 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) component among the pest control components (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 21.1 mass% clay as other components, and a total of 3.9 mass% of zinc oxide, binder, surfactant, fragrance and other components. Therefore, the mass ratio (B) / (A) of components (A) to (B) is 24.0.

[0045] The smoke-type insecticide of Comparative Example 1 will be examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a component of the pyrethroid compound (a1), was 78%, which is within the evaluation standard of 75% or more and less than 80%, and is therefore favorable from the standpoints of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. However, the residual insecticidal activity (lethality) is extremely poor, with the mortality rate being less than 60%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0046] The smoke-type insecticide produced as Comparative Example 2 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 0.5 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 75.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 21.1 mass% clay as other ingredients, and 2.6 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 57.7. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 1.60.

[0047] The smoke-type insecticide of Comparative Example 2 is examined based on each evaluation item. First, the volatilization rate was 91% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 85% for broflanilide, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80%, and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. However, the residual efficacy (lethality) of the insecticide is poor, with the mortality rate ranging from 60% to less than 80%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0048] The smoke-type insecticide produced as Comparative Example 3 contains 8.0 mass% permethrin as a pyrethroid compound (a1) component and 6.0 mass% methoxadiazone as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 60.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.9 mass% clay as other components, and 7.1 mass% total of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 4.3. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 1.33.

[0049] The smoke-type insecticide of Comparative Example 3 is examined based on each evaluation item. First, the volatilization rate was 43% for permethrin, a pyrethroid compound (a1), and 51% for methoxadiazone, a non-pyrethroid compound (a2), both of which were below the evaluation standard of 70% and were extremely poor in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown property) is good, with the rate of turning over being 80% or more and less than 100%. However, the residual efficacy (lethality) of the insecticide is poor, with the mortality rate ranging from 60% to less than 80%. As for the burnt smell from the smoking container, the smell was very strong and made the container unsuitable for use.

[0050] The smoke-type insecticide produced as Comparative Example 4 contains 0.9 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 0.4 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 60.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.7 mass% clay as other ingredients, and a total of 20.1 mass% of zinc oxide, binder, surfactant, and other ingredients of fragrance. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 48.0. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 2.57.

[0051] The smoke-type insecticide of Comparative Example 4 is examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a pyrethroid compound (a1), was 72%, which is between 70% and 75% of the evaluation standard, and is poor in terms of efficiency and cost performance. Also, the volatilization rate of broflanilide, a non-pyrethroid compound (a2), was 75%, which is between 75% and 80% of the evaluation standard, and is good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown property) is good, with the rate of turning over being 80% or more and less than 100%. However, the residual efficacy (lethality) of the insecticide is poor, with the mortality rate ranging from 60% to less than 80%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0052] The smoke-type insecticide produced as Comparative Example 5 contains 0.1 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 2.4 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 60.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 18.7 mass% clay as other ingredients, and 18.8 mass% total of zinc oxide, binder, surfactant, fragrance, and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 24.0. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.04.

[0053] The smoke-type insecticide of Comparative Example 5 is examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a pyrethroid compound (a1), was 75%, which is above the evaluation standard of 75% and below 80%, and is good in terms of efficiency and cost performance. On the other hand, the volatilization rate of broflanilide, a non-pyrethroid compound (a2), was 65%, which is below the evaluation standard of 70%, and is extremely poor in terms of efficiency and cost performance. Next, the rapidity of the insecticidal activity (knockdown property) is poor, with the rate of turning over being 60% or more but less than 80%. However, the residual efficacy (lethality) of the insecticide is good, with the mortality rate being between 80% and less than 100%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0054] The smoke-type insecticide produced as Comparative Example 6 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 2.4 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 50.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 40.7 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 15.6. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.33.

[0055] The smoke-type insecticide of Comparative Example 6 is examined based on each evaluation item. First, the volatilization rate of d·dT-cyphenothrin, a pyrethroid compound (a1), was 60%, and that of broflanilide, a non-pyrethroid compound (a2), was 55%, both of which were below the evaluation standard of 70% and were extremely poor in terms of efficiency and cost performance. Furthermore, the rapidity of the insecticidal activity (knockdown property) is extremely poor, with the rate of turning over being less than 60%. Furthermore, the residual efficacy (lethality) of the insecticide is extremely poor, with the mortality rate being less than 60%. As for the burnt smell from the smoking container, there is either no burnt smell or only a slight smell, making it easy to use.

[0056] The smoke-type insecticide produced as Comparative Example 7 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 4.0 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 85.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 4.1 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 17.7. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.20.

[0057] The smoke-type insecticide of Comparative Example 7 is examined based on each evaluation item. First, the volatilization rate was 90% for d·dT-cyphenothrin, a pyrethroid compound (a1), and 85% for broflanilide, a non-pyrethroid compound (a2), both of which exceeded the evaluation standard of 80%, and were extremely good in terms of efficiency and cost performance. Next, the rapidity of the insecticidal effect (knockdown effect) is extremely good, with a rate of 100%. Furthermore, its residual insecticidal activity (lethality) is extremely good, with a mortality rate of 100%. In addition, the smell of burning from the smoking container was very strong, making it difficult to use.

[0058] From the above examples and comparative examples, the composition and compounding ratio of a fumigation type insecticide that gives extremely good evaluation items will be confirmed. From the very good and good results of Examples 1 to 7 and the very poor results of Comparative Examples 6 and 7, it is found that the organic foaming agent is preferably 60 to 80%. This is because if it is below the lower limit, the volatilization rate of the pest control component (A) drops significantly. Also, if it is above the upper limit, the burning odor of the smoking container becomes prominent. In addition, from the very good and good results of Examples 1 to 7 and the poor and very poor results of Comparative Examples 2 and 3, it is found that the mass ratio (B) / (A) of the component (A) to the component (B) is preferably in the range of 15 to 50. This is because if it is below the lower limit, the volatilization rate of the pest control component (A) drops significantly, and if it is above the upper limit, the burning odor of the smoking container becomes prominent. Furthermore, from the very good and good results of Examples 1 to 7 and the result of Comparative Example 1, it is found that it is preferable to select two or more pest control components as component (A). It is also found that the two or more pest control components are preferably one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2). This is because it is possible to achieve both immediate effectiveness (knockdown effect) and residual effectiveness (lethality).

[0059] From the very good and good results of Examples 1 to 7 and the poor and very poor results of Comparative Examples 4 and 5, it is found that the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably in the range of 0.1 to 2.0. If it is below the lower limit, the volatilization rate of the non-pyrethroid compound (a2) component decreases. On the other hand, if it is above the upper limit, the volatilization rate of the pyrethroid compound (a1) component decreases.

[0060] Moreover, from the very good and good results of Examples 1 to 7 and the poor and very poor results of Comparative Example 3, it is understood that d·dT-cyphenothrin and fenothrin are preferable as the pyrethroid compound (a1). Furthermore, from the very good and good results of Examples 1 to 7 and the poor and very poor results of Comparative Example 3, it is clear that it is preferable to select one or more compounds selected from dichlorvos, indoxacarb, and broflanilide as the non-pyrethroid compound (a2). This is because, by selecting the above-mentioned compounds within the above-mentioned parameter ranges, it is possible to obtain properties that are good or better in all respects of volatilization rate, insecticidal efficacy, and usability.

[0061] Furthermore, from the very good and good results of Examples 1 to 7, it is clear that azodicarbonamide is preferably selected as the component (B). (Test Example 2)

[0062] Hereinafter, the present invention will be specifically described with reference to examples and comparative examples in Table 2 as Test Example 2. The evaluation criteria for the evaluation items are in accordance with Test Example 1. Furthermore, the method for preparing the smoke-type insecticide in Test Example 2 is in accordance with Test Example 1.

[0063] [Table 2]

[0064] In Examples 8 and 9 and Comparative Examples 8 to 10 in Test Example 2, 12.5 g of the smoke was filled into the smoke granule filling section of a heat generating container, and 37 g of calcium oxide was filled in, and the container was airtightly packed to prepare a smoke agent. 3 In a test room (3.8m length x 4.3m width x 2.4m height), waist-high petri dishes containing 10 German cockroaches were placed in eight locations. After sealing the room for two hours, the rate of overturning over time and the mortality rate one week later were examined.

[0065] Regarding Examples 8 to 9 The smoke-type insecticide produced as Example 8 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 3 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.1 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 18.9. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.27.

[0066] The smoke-type insecticide of Example 8 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against German cockroaches is extremely good, with a rate of 100%. Furthermore, the residual efficacy (lethality) of the insecticide against German cockroaches is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0067] The smoke-type insecticide produced as Example 9 contains 1 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 2.4 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It further contains 17.6 mass% clay as other ingredients, and 6.5 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 21.3. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.42.

[0068] The smoke-type insecticide of Example 9 will be evaluated based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against German cockroaches is extremely good, with a rate of 100%. Furthermore, the residual efficacy (lethality) of the insecticidal activity against German cockroaches is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0069] Comparative Examples 8 to 10 The smoke-type insecticide produced as Comparative Example 8 contains 10.5 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 5 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It also contains 5.5 mass% clay as other ingredients, and 6.5 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 4.7. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 2.10.

[0070] The smoke-type insecticide of Comparative Example 8 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against German cockroaches was poor, with the rate of the drug turning over being 60% or more but less than 80%. However, the residual efficacy (lethality) of the insecticidal effect against German cockroaches is good, with the mortality rate being between 80% and 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0071] The smoke-type insecticide produced as Comparative Example 9 contains 12 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 5 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It also contains 4.0 mass% clay as other ingredients, and 6.5 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 4.3. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 2.40.

[0072] The smoke-type insecticide of Comparative Example 9 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against German cockroaches was poor, with the rate of the drug turning over being 60% or more but less than 80%. However, the residual efficacy (lethality) of the insecticidal effect against German cockroaches is good, with the mortality rate being between 80% and 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0073] The smoke-type insecticide produced as Comparative Example 10 contains 10 mass% indoxacarb as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It further contains 11.0 mass% clay as other components, and 6.5 mass% total of zinc oxide, binder, surfactant, fragrance, and other components. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 7.3.

[0074] The smoke-type insecticide of Comparative Example 10 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown effect) against German cockroaches was extremely poor, with the rate of the drug turning over being less than 60%. However, the residual efficacy (lethality) of the insecticide against German cockroaches is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0075] From the above examples and comparative examples, the composition and compounding ratio of a fumigation type insecticide that gives extremely good evaluation items will be confirmed. From the very good and good results of Examples 8 and 9 and the poor and very poor results of Comparative Examples 8 to 10, it is understood that the mass ratio (B) / (A) of component (A) to component (B) is preferably in the range of 15 to 50. This is because, below the lower limit, the volatility of the pest control component decreases, and the rapid action (knockdown property) decreases. Furthermore, from the very good and good results of Examples 8 and 9, and the very poor result of Comparative Example 10, it is found that it is preferable to select two or more pest control components as component (A). It is also found that the two or more pest control components are preferably one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2). This is because it is possible to achieve both rapid action (knockdown effect) and residual action (lethality).

[0076] From the very good and good results of Examples 8 and 9 and the poor results of Comparative Examples 8 and 9, it is found that the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably in the range of 0.1 to 2.0. If the mass ratio exceeds the upper limit, the volatilization rate of the pyrethroid compound (a1) decreases, thereby decreasing the rapid-acting property (knockdown property).

[0077] Moreover, from the very good and good results of Examples 8 and 9, it is evident that it is preferable to select d·dT-cyphenothrin as compound (a1). Furthermore, from the very good and good results of Examples 8 and 9, it is evident that it is preferable to select the compound (a2) as indoxacarb. This is because, by selecting the above-mentioned compounds within the above-mentioned parameter ranges, it is possible to obtain properties that are at least good in terms of both insecticidal efficacy and ease of use.

[0078] Furthermore, from the very good and good results of Examples 8 and 9, it is evident that it is preferable to select azodicarbonamide as component (B).

[0079] From the above results, it is evident that the fumigation type insecticide having the above composition and mixing ratio has extremely good control, extermination and insecticidal properties against the German cockroach.

[0080] In Example 10 and Comparative Example 11 in Test Example 2, 55 g of 10 g of fumigating granules were filled into a container, and calcium oxide was added to prepare a fumigating agent. Nine brown marmorated stink bugs were placed in the container, and the container was sealed for two hours, after which the rate of upturning over time and the mortality rate after one week were examined.

[0081] Regarding Example 10 The smoke-type insecticide produced as Example 10 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 2.4 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It further contains 18.7 mass% clay as other ingredients, and 6.1 mass% total of zinc oxide, binder, surfactant, fragrance and other ingredients. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 22.5. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.33.

[0082] The fumigation type insecticide of Example 10 will be examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against brown stink bugs is extremely good, with a rate of 100%. Furthermore, the residual efficacy (lethality) of the insecticide against brown stink bugs is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0083] Regarding Comparative Example 11 The smoke-type insecticide produced as Comparative Example 11 contains 0.8 mass% d·dT-cyphenothrin as a pyrethroid compound (a1) and 5.0 mass% methoxadiazone as a non-pyrethroid compound (a2) among the pest control ingredients (A) as raw materials. It also contains 72.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 17.1 mass% clay as other ingredients, and a total of 5.1 mass% of zinc oxide, binder, surfactant, and other ingredients of fragrance. Therefore, the mass ratio (B) / (A) of the (A) ingredient to the (B) ingredient is 12.4. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.16.

[0084] The smoke-type insecticide of Comparative Example 11 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown effect) against brown stink bugs is good, with the rate of upturning being 80% or more but less than 100%. However, the residual efficacy (lethality) of the insecticide against brown stink bugs is poor, with the mortality rate being between 60% and 80%. However, in terms of usability, the smell of burning from the smoking container is either completely or only slightly burning, which is satisfactory.

[0085] From the above examples and comparative examples, the composition and blending ratio of a fumigation type insecticide that gives extremely good evaluation items will be confirmed. From the very good and good results of Example 10 and the poor result of Comparative Example 11, it is understood that the mass ratio (B) / (A) of the component (A) to the component (B) is preferably in the range of 15 to 50. This is because, below the lower limit, volatility decreases and residual efficacy (lethality) decreases. Furthermore, from the very good and good results of Example 10, it is found that the two or more pest control components are preferably one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2), because this makes it possible to achieve both rapid action (knockdown effect) and residual action (lethality).

[0086] From the very good and good results of Example 10, it is apparent that the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably in the range of 0.1 to 2.0.

[0087] Moreover, from the very good and good results of Example 10, it is understood that it is preferable to select d·dT-cyphenothrin as compound (a1). Furthermore, from the very good and good results of Example 12, it is understood that it is preferable to select the compound (a2) as a broflanilide compound. This is because, by selecting the above-mentioned compounds within the above-mentioned parameter ranges, it is possible to obtain properties that are at least good in terms of both insecticidal efficacy and ease of use.

[0088] Furthermore, from the very good and good results of Example 10, it is clear that azodicarbonamide is preferably selected as component (B).

[0089] From the above results, it can be seen that the fumigation-type insecticide having the above composition and mixing ratio has extremely good control, extermination and insecticidal properties against brown stink bugs.

[0090] In Example 11 and Comparative Example 12 in Test Example 2, 3 The pill bugs were placed in a chamber, smoked with 0.2 g of granules, and then sealed for one hour. The rate of rolling over over time and the mortality rate one week later were then examined.

[0091] Regarding Example 11 The smoke-type insecticide produced as Example 11 contains 1.2 mass% fenothrin as a pyrethroid compound (a1) and 3.0 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It also contains 17.2 mass% clay as other components, and 6.1 mass% total of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 17.3. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.40.

[0092] The fumigation type insecticide of Example 11 will be examined based on each evaluation item. The rapid action (knockdown) of the insecticide against pillbugs is extremely good, with a rate of 100%. Furthermore, the residual efficacy (lethality) of the insecticide against pill bugs is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0093] Regarding Comparative Example 12 The smoke-type insecticide produced as Comparative Example 12 contains 6.0 mass% fenothrin as a pyrethroid compound (a1) and 5.0 mass% methoxadiazone as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 70.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 13.9 mass% clay as other components, and a total of 5.1 mass% of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 6.4. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 1.20.

[0094] The smoke-type insecticide of Comparative Example 12 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown ability) against pillbugs is poor, with the rate of upturning being 60% or more but less than 80%. In addition, the residual efficacy (lethality) of the insecticide against pill bugs is poor, with the mortality rate being between 60% and 80%. However, in terms of usability, the smell of burning from the smoking container is either completely or only slightly odorous, which is satisfactory.

[0095] From the above examples and comparative examples, the composition and blending ratio of a fumigation type insecticide that gives extremely good evaluation items will be confirmed. From the very good and good results of Example 11 and the poor result of Comparative Example 12, it is understood that the mass ratio (B) / (A) of the component (A) to the component (B) is preferably in the range of 15 to 50. This is because, below the lower limit, volatility decreases, and the immediate effect (knockdown effect) and residual effect (lethality) decrease. Furthermore, from the very good and good results of Example 11, it is found that the two or more pest control components are preferably one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2), because this makes it possible to achieve both rapid action (knockdown effect) and residual action (lethality).

[0096] From the very good and good results of Example 11, it is apparent that the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably in the range of 0.1 to 2.0.

[0097] Moreover, from the very good and good results of Example 11, it is understood that it is preferable to select fenothrin as the compound (a1). Furthermore, from the very good and good results of Example 11, it is understood that it is preferable to select the compound (a2) as a broflanilide compound. This is because, by selecting the above-mentioned compounds within the above-mentioned parameter ranges, it is possible to obtain properties that are at least good in terms of both insecticidal efficacy and ease of use.

[0098] Furthermore, from the very good and good results of Example 11, it is clear that azodicarbonamide is preferably selected as component (B).

[0099] From the above results, it is evident that the fumigation type insecticide having the above composition and mixing ratio has extremely good control, extermination and insecticidal properties against pill bugs.

[0100] In Example 12 and Comparative Example 13 in Test Example 2, 3 Rice weevils were placed in a chamber, 0.2 g of granules were smoked, and the chamber was then sealed for one hour. The rate of turning over over time and the mortality rate one week later were then examined.

[0101] Regarding Example 12 The smoke-type insecticide produced as Example 12 contains 2.0 mass% fenothrin as a pyrethroid compound (a1) and 2.8 mass% broflanilide as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 72.5 mass% azodicarbonamide as an organic foaming agent (B). It also contains 15.7 mass% clay as other components, and 7.0 mass% total of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 15.1. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.71.

[0102] The fumigation type insecticide of Example 12 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown rate) against rice weevils is extremely good, with a 100% rate of reversal. Furthermore, the residual efficacy (lethality) of the insecticide against rice weevils is extremely good, with a mortality rate of 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0103] Regarding Comparative Example 13 The smoke-type insecticide produced as Comparative Example 13 contains 2.0 mass% fenothrin as a pyrethroid compound (a1) and 3.0 mass% methoxadiazone as a non-pyrethroid compound (a2) among the pest control components (A) as raw materials. It also contains 70.0 mass% azodicarbonamide as an organic foaming agent (B). It also contains 18.0 mass% clay as other components, and 7.0 mass% total of zinc oxide, binder, surfactant, and other components of fragrance. Therefore, the mass ratio (B) / (A) of the (A) component to the (B) component is 14.0. The mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.67.

[0104] The smoke-type insecticide of Comparative Example 13 is examined based on each evaluation item. The rapidity of the insecticidal effect (knockdown ability) against rice weevils is poor, with the rate of reversal being 60% or more but less than 80%. However, the residual efficacy (lethality) of the insecticide against rice weevils is good, with the mortality rate being between 80% and 100%. In terms of usability, the smell of burning from the smoking container is excellent, being either completely or slightly odorless.

[0105] From the above examples and comparative examples, the composition and compounding ratio of a fumigation type insecticide that gives extremely good evaluation items will be confirmed. From the very good and good results of Example 12 and the poor result of Comparative Example 13, it is understood that the mass ratio (B) / (A) of the (A) component to the (B) component is preferably in the range of 15 to 50. This is because, below the lower limit, the volatilization rate decreases, and the residual efficacy (lethality) decreases. Furthermore, from the very good and good results of Example 12, it is found that it is preferable to select two or more pest control components as component (A). It is also found that the two or more pest control components are preferably one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2). This is because it is possible to achieve both rapid action (knockdown effect) and residual action (lethality).

[0106] From the very good and good results of Example 12, it is apparent that the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is preferably in the range of 0.1 to 2.0.

[0107] Moreover, from the very good and good results of Example 12, it is understood that it is preferable to select fenothrin as the compound (a1). Furthermore, from the very good and good results of Example 12, it is understood that it is preferable to select the compound (a2) as a broflanilide compound. This is because, by selecting the above-mentioned compounds within the above-mentioned parameter ranges, it is possible to obtain properties that are at least good in terms of both insecticidal efficacy and ease of use.

[0108] Furthermore, from the very good and good results of Example 12, it is clear that azodicarbonamide is preferably selected as component (B).

[0109] From the above results, it is apparent that the fumigation type insecticide having the above composition and mixing ratio has extremely good control, extermination and insecticidal properties against rice weevils. [Industrial Applicability]

[0110] INDUSTRIAL APPLICABILITY The present invention has industrial applicability as a fumigant composition having excellent pest control effect and a pest control method using the same. [Explanation of symbols]

[0111] 1····fumigation type insecticide device, 10···outer container, 12···main body, 14···lid, 16···bottom, 20···inner container, 22···inner bottom center, 30···heat generating part, 40···fumigation type insecticide

Claims

1. A fumigant composition comprising two or more pest-controlling components as component (A) and 60 to 80% of an organic foaming agent as component (B), wherein the mass ratio of component (A) to component (B), (B) / (A), is 15 to 50.

2. The fumigant composition according to claim 1, wherein component (A) comprises one or more pyrethroid compounds (a1) and one or more non-pyrethroid compounds (a2).

3. The fumigant composition according to claim 2, wherein the mass ratio (a1) / (a2) of the pyrethroid compound (a1) to the non-pyrethroid compound (a2) is 0.1 to 2.

0.

4. The fumigant composition according to claim 2 or 3, wherein compound (a1) comprises one or more compounds selected from d.d-T-cyphenothrin and fenothrin, and compound (a2) comprises one or more compounds selected from dichlorvos, indoxacarb, and broflanilide.

5. The fumigation composition according to any one of claims 1 to 3, wherein component (B) comprises azodicarbonamide.

6. The fumigant composition according to any one of claims 1 to 5, wherein the pests to be controlled are one or more selected from the group consisting of cockroaches, stink bugs, maize weevils, and pill bugs.

7. A method for controlling pests, which uses the fumigant composition according to any one of claims 1 to 6.

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