Pest control agent, pest control sheet and pest control method of ochetellus glaber

Abstract

To provide a pest control agent, even with a slight amount of effective ingredients, high in repellent effect against pests such as Ochetellus glaber and the like, easy in handling, less in effect to surrounding subjects and environment, capable of efficiently controlling pests such as Ochetellus glaber and so on, a pest control sheet and a pest control method of Ochetellus glaber.SOLUTION: Provided are a pest control agent containing vegetable oil that includes fatty acids as active ingredients, a pest control sheet, and a method for controlling pests, where the fatty acid is characterized by the inclusion of stearic acid and oleic acid.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pest control agent, a pest control sheet, and a method for controlling blue ants. [Background technology]

[0002] Ants are social insects, and their lifestyles, feeding habits, and habitats are diverse, overlapping with many aspects of the human living environment. There have also been reports of the impact of ants on human activities, and in Japan, some species are designated as nuisance pests.

[0003] Common examples include invading houses and eating food, but there have also been reports of them invading electronic devices and electrical wiring, such as computers, printers, and watches, gnawing at the internal structures and causing malfunctions. These types of damage are often caused by omnivorous species that feed on a wide range of subjects, and it is believed that their wide range of diet and feeding habits are the cause of this unique damage. In recent years, there have been reports of damage in Japan in which ants have invaded in groups into storage boxes for household tissues, etc., gnawing at the tissue paper and causing damage. This particular type of damage is often caused by the omnivorous ant species Ochetellus glaber, which is one of the most common species that cause such damage to humans.

[0004] In general, it is difficult to completely eradicate ants. It is not easy to find the nest, and even if you do find it, the female ants often escape cleverly. Baiting (food poisoning) is an effective way to eradicate such ants. As an example of a prior art document in which the bait method is used on storage boxes for household tissues and the like, Patent Document 1 discloses an anti-termite cover for a sheet-like item storage container, which covers an area that is continuously connected around the entire periphery of the side of the sheet-like item storage container and an area that is continuously connected around the entire outer periphery of the bottom of the sheet-like item storage container and includes the bottom, and which contains an anti-termite agent inside or on the surface of the anti-termite cover. Patent Document 2 discloses a carton for storing sanitary paper, the carton having a top surface, a bottom surface, a pair of side surfaces and a pair of end surfaces, which form an internal space for enclosing sanitary paper, and which has a ring-shaped cut line for forming an outlet formed in the top surface and a cut-out portion defined by the cut line for forming the outlet formed in the top surface; a slit for removing sanitary paper, a window film attached to the inward surface of the top surface so as to close the cut-out portion, and a wiping sheet enclosed between the cut-out portion of the top surface and the window film, the wiping sheet being fixed to at least one of the inward surface of the cut-out portion and the outward surface of the window film in a manner that allows it to be peeled off and reattached via an adhesive layer made of a removable adhesive, and further discloses that the wiping sheet has an anti-termite agent made of a natural extract attached to it. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4663765 [Patent Document 2] Patent No. 5994267 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when commercially available ant baits are applied to storage boxes such as household tissues as in Patent Document 1, the odor of the active ingredients is strong, and the odor transfers to paper products such as tissues, making them unpleasant and unusable when used for blowing one's nose. Also, when generating a repellent effect by emitting an odor, the more the amount applied, the more unusable it becomes, making it difficult to maintain the effect for a long time. In addition, the measures of incorporating an anti-termite agent into a sheet as in Patent Document 2, or wiping off the pheromone, were not sufficient to prevent blue ants. Furthermore, when wiping off the pheromone with a sheet, if the viscosity of the anti-termite agent contained in the sheet is low, the agent often penetrates into areas other than the intended wiping area. On the other hand, if the viscosity of the anti-termite agent is high, handling becomes difficult, such as difficulty in application and impregnation into the sheet.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a pest control agent, a pest control sheet, and a method for controlling the luria ant that have a high repellent effect against pests such as the luria ant even with a small amount of active ingredient, are easy to handle, are long-lasting, have little impact on surrounding objects and the environment, and can efficiently control pests such as the luria ant. [Means for solving the problem]

[0008] As a result of intensive research, the inventors have found that a specific fatty acid contained in a vegetable oil has a repellent effect against pests, and by using a vegetable oil containing said fatty acid as a pest control agent, it is possible to obtain a pest control agent, a pest control sheet, and a method for controlling the blue ant that have a high repellent effect against pests such as the blue ant even with a small amount of active ingredient, are easy to handle when applying or impregnating the control agent, are long-lasting, have little impact on surrounding objects and the environment, and can efficiently control pests such as the blue ant, and have thus completed the present invention. That is, the present invention provides the following.

[0009] (1) A first aspect of the present invention is a pest control agent containing a vegetable oil containing a fatty acid as an active ingredient, characterized in that the fatty acid contains stearic acid and oleic acid.

[0010] (2) A second aspect of the present invention is the pest control agent according to (1), characterized in that the composition ratio of the oleic acid contained in the pest control agent is 3.0 to 35.0 times the composition ratio of the stearic acid contained in the pest control agent.

[0011] (3) A third aspect of the present invention is the pest control agent according to (1), characterized in that the viscosity of the pest control agent is 30 mPa·s or more and 60 mPa·s or less.

[0012] (4) A fourth aspect of the present invention is the pest control agent according to (1), characterized in that the vegetable oil is any one selected from the group consisting of olive oil, soybean oil, linseed oil, and sesame oil.

[0013] (5) A fifth aspect of the present invention is a pest control sheet, comprising a porous sheet impregnated with the pest control agent according to (1).

[0014] (6) A sixth aspect of the present invention is the porous sheet according to (5), characterized in that the impregnation time of the porous sheet with the pest control agent is 3 hours or more and 96 hours or less.

[0015] (7) A seventh aspect of the present invention is a method for controlling blue ants using a vegetable oil containing a fatty acid as an active ingredient as a control agent, characterized in that the fatty acid contains stearic acid and oleic acid, and the composition ratio of oleic acid contained in the control agent is 3.0 to 35.0 times the composition ratio of stearic acid contained in the control agent.

[0016] (8) An eighth aspect of the present invention is the method for controlling blue ants described in (7), characterized in that the viscosity of the control agent is 30 mPa·s or more and 60 mPa·s or less. Effect of the Invention

[0017] According to the present invention, it is possible to provide a pest control agent, a pest control sheet, and a method for controlling the luria ant that have a high repellent effect against pests such as the luria ant even with a small amount of active ingredient, are easy to handle, have a long-lasting effect, have little impact on surrounding objects and the environment, and can efficiently control pests such as the luria ant. [Brief description of the drawings]

[0018] [Figure 1] FIG. 13 is a graph showing the results of a repellency experiment using vegetable oil. [Diagram 2] FIG. 1 is a graph showing the results of a repellency experiment using olive oil. [Diagram 3] FIG. 1 is a graph showing the relationship between the ratio of oleic acid to stearic acid in six types of vegetable oils and the number of ant populations attracted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment for carrying out the present invention (hereinafter, simply referred to as "the present embodiment") will be described in detail. The present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0020] <Pest control agents> A pest control agent according to one embodiment of the present invention contains a vegetable oil containing a fatty acid as an active ingredient. In the present invention, the term "pest" mainly refers to the blue ant (Ochetellus glaber), but is not limited to other insects such as omnivorous ants and other insects with antennae that mainly chew and damage sanitary paper such as household tissues.

[0021] The fatty acids contained in the pest control agent of the present invention include stearic acid and oleic acid. By containing stearic acid and oleic acid, even with a small amount of active ingredient, it is possible to obtain a pest control agent that has a high repellent effect against pests such as blue ants, is easy to handle, has long-lasting properties, has little impact on surrounding objects and the environment, and can efficiently control pests such as blue ants.

[0022] In addition, among the fatty acids contained in the pest control agent, the composition ratio of oleic acid contained in the pest control agent is preferably 3.0 to 35.0 times the composition ratio of stearic acid contained in the pest control agent. By setting the composition ratio of oleic acid and stearic acid within the above range, a pest control agent having superior repellent effect and durability can be obtained. Furthermore, the composition ratio of oleic acid / stearic acid is more preferably 5.0 times or more and 20 times or less.

[0023] Furthermore, the viscosity of the pest control agent is preferably 30 mPa·s or more and 60 mPa·s or less. With a viscosity in this range, the pest control agent has an excellent repellent effect and is easy to handle. It is more preferable that the lower limit of the viscosity of the pest control agent is 35 mPa·s or more. It is more preferable that the upper limit is 55 mPa·s or less.

[0024] The vegetable oil containing fatty acids is not particularly limited as long as it is a commercially available oil, but is preferably any one selected from the group consisting of olive oil, soybean oil, linseed oil, and sesame oil. By using any of the above vegetable oils, the composition ratio of oleic acid and stearic acid contained therein becomes appropriate, and it is possible to obtain a pest control agent that is excellent in repellency effect, ease of handling, and durability.

[0025] In addition, the pest control agent of the present invention is expected to have a similar effect on ants and insects that have the same ecology as the luria ant, in addition to the luria ant. In addition, the pest control agent of the present invention is expected to have a similar control effect on animal oils that have the same fatty acids as the luria ant, in addition to vegetable oils.

[0026] <Pest control sheet> A pest control sheet according to another embodiment of the present invention is a porous sheet impregnated with a pest control agent. The impregnation time of the porous sheet with the pest control agent is preferably 3 hours or more and 96 hours or less. If it is less than 3 hours, the pest control agent does not sufficiently impregnate the porous sheet. If it is more than 96 hours, the surface of the pest control sheet becomes sticky and contaminates the surrounding objects.

[0027] <How to control ants> Another embodiment of the method for controlling blue ants according to the present invention uses the fatty acids stearic acid and oleic acid as the active ingredients in the above-mentioned composition ratio. By using the above-mentioned types of fatty acids as the fatty acids in the above-mentioned composition ratio, even a small amount of active ingredient has a high repellent effect on pests such as blue ants, is easy to handle, has little impact on surrounding objects and the environment, and can efficiently control pests such as blue ants. In addition to impregnating the porous sheet with the pest control agent as described above, other methods of controlling blue ants include applying the agent to the entry routes of pests, filling gaps, embedding the agent in microcapsules, and applying the agent to objects to be protected.

[0028] Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications or improvements can be made to the above embodiments. In addition, it is clear from the description of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention. EXAMPLES

[0029] The present invention will be described in detail below with reference to examples. However, the present invention is not limited to the examples shown below.

[0030] <Ratio of fatty acids contained in various vegetable oils> First, the fatty acid content ratios in various vegetable oils were analyzed. After diluting the vegetable oil samples with an appropriate amount of organic solvent, the types and content ratios of fatty acids that make up each oil component were analyzed by GC analysis and GC-MS analysis. As a result, oleic acid and stearic acid were detected in the six types of vegetable oil shown in Table 1 at the composition ratios (%) shown in the table. [Table 1]

[0031] <Repellent experiments using various vegetable oils> Next, a bioassay was conducted to repel ants using five types of vegetable oils. A porous sheet was impregnated with five types of vegetable oils to create a pest control sheet, and a sheet not impregnated with vegetable oil was prepared as a control. Food (cut mealworms) and one or two pieces of tissue were placed on these sheets in a plastic case, and the sheets were then arranged in an ant breeding case. After that, pictures were taken every hour for 12 hours with a digital camera, and the number of ants in each tissue and plastic case was counted. This counting was done every day for three days after installation, and the food was changed after each photo. A repellent experiment was conducted using 20 sheets of each type of sheet, and the average number of ants per hour was calculated and the graph shown in Figure 1 was created. The graph in the back shows the results for the control porous sheet, and the graph in the front shows the results for the pest control sheet. The vertical axis shows the average number of ants in each tissue and plastic case per hour, and the horizontal axis shows the experimental time. As shown in Figure 1, it was confirmed that soybean oil, linseed oil, and sesame oil in particular had a repellent effect that prevented blue ants from approaching.

[0032] <Repellent experiment using olive oil> Next, among the various vegetable oils, only olive oil was used in the repellency experiment. Sponge rubber sheets (Nobrand Silicone Sponge Rubber T2, 2mm thick) were cut to 10cm length and 8cm width, and the sheets were immersed in vegetable oil (Nissin Olive Oil) and left to soak for 48 hours at room temperature (approximately 25℃) to create insect control sheets. In order to increase the oil's permeability, some insect control sheets were also created by soaking the sheets in oil for 48 hours at 80℃ in an incubator. After the penetration process was completed, the sheets were left to dry naturally at room temperature for more than 24 hours, and excess oil on the surface was wiped off. About 20 of these sheets were made in different sizes.

[0033] Next, two types of pest control sheets, one treated at room temperature and one treated at high temperature, and an untreated rubber sheet were prepared as a control. Food (cut mealworms) and one or two pieces of tissue were placed in a plastic case on top of these three types of sheets, and the case was set up inside the ant breeding case. After setting up, pictures were taken with a digital camera every hour for 12 hours, and the number of ants in each tissue and case was counted. This counting and photography was carried out every day for three days after setting up, and the food was changed after each photo. After the third day, the ants were photographed four times, one week apart, for a period of 30 days. During this period, the sheet and tissue case were left in the ant rearing cage. After 30 days, the tissue case and sheet were removed, and then they were put back in place 60 days later and photographed again. This experiment was carried out on three colonies. Finally, the number of ants was compared between the sheets to compare their control effects and their durability. In the graph shown in Figure 2, the graph at the back shows the results for the untreated sheet, the graph in the middle shows the results for the pest control sheet treated at high temperature, and the graph at the front shows the results for the pest control sheet treated at room temperature. The vertical axis shows the average number of ants per hour on each tissue paper and plastic case, and the horizontal axis shows the duration of the experiment.

[0034] As shown in Figure 2(a), after 12 hours of testing, almost no approach of blue ants was observed on the pest control sheet compared to the untreated sheet, and similar effects were observed between room temperature and high temperature treatments. In addition, as shown in Figure 2(b), clear pest control effects were observed over a 30-day period and even after 60 days, proving its high durability. Furthermore, even when observed directly, almost no luria ants were found climbing onto the insect control sheet. When each tissue was compared after 30 days, numerous areas of damage caused by luria ants were found on the untreated sheet, but no damage was found on the insect control sheet.

[0035] Figure 3 shows the relationship between the number of ant-attracting individuals and the composition ratio of oleic acid to stearic acid in six types of vegetable oils. The composition ratio of oleic acid to stearic acid was calculated based on the fatty acid content ratio. As shown in Figure 3, the composition ratio of oleic acid to stearic acid in the four types of vegetable oils that were highly repellent in the repellency experiment (olive oil, soybean oil, linseed oil, and sesame oil) showed a different distribution from the other two types.

[0036] <Evaluation of anti-termite effect and ease of application> Finally, the pest control agents made of vegetable oils of Examples 1 to 13 and Comparative Examples 1 to 3 shown in Tables 2 and 3 were used to evaluate the anti-termite effect and ease of handling (ease of application). (Anti-termite effect) The anti-termite effect was evaluated in the above-mentioned repellent experiment by the method described below. ◎: The average number of ants in the plastic container after 12 hours was less than 5.0 〇: The average number of ants in the plastic case after 12 hours was 5.0 or more and less than 8.0 △: The average number of ants in the plastic case after 12 hours was 8.0 or more and less than 10.0 ×: The average number of ants in the plastic container after 12 hours was 10.0 or more

[0037] (Easy to apply) Ease of application was confirmed through application tests conducted by monitors. ⊚: The control agent can be applied accurately and smoothly to the desired area, or can be impregnated into the inside of the porous sheet. ◯: The control agent can be applied accurately and smoothly to the desired area, or the control agent can be impregnated into most of the inside of the porous sheet. Δ: The desired area can be applied fairly accurately, but the application is not very smooth. Alternatively, the interior of the porous sheet can be impregnated with the adhesive, but the impregnation is difficult. ×: The control agent penetrates into areas other than the intended area, or the viscosity is high and application is laborious. Or the control agent can only be impregnated into a part of the porous sheet.

[0038] [Table 2]

[0039] [Table 3]

[0040] From the above, it was confirmed that this example provides a pest control agent that has a high repellent effect against pests such as the blue ant, is easy to handle, has little impact on surrounding objects and the environment, and can efficiently control pests such as the blue ant, even with a small amount of active ingredient.

Claims

1. A pest control agent containing a vegetable oil containing a fatty acid as an active ingredient, A pest control agent, characterized in that the fatty acid includes stearic acid and oleic acid.

2. 2. The pest control agent according to claim 1, wherein the composition ratio of said oleic acid contained in the pest control agent is 3.0 to 35.0 times the composition ratio of said stearic acid contained in the pest control agent.

3. 2. The pest control agent according to claim 1, wherein the viscosity of the pest control agent is 30 mPa·s or more and 60 mPa·s or less.

4. The pest control agent according to claim 1, wherein the vegetable oil is any one selected from the group consisting of olive oil, soybean oil, linseed oil, and sesame oil.

5. 13. A pest control sheet comprising a porous sheet impregnated with the pest control agent according to claim 1.

6. 6. The pest control sheet according to claim 5, wherein the porous sheet is impregnated with the pest control agent for a period of time ranging from 3 hours to 96 hours.

7. A method for controlling blue ants using a vegetable oil containing a fatty acid as an active ingredient as a control agent, comprising: The fatty acids include stearic acid and oleic acid, A method for controlling blue ants, characterized in that the composition ratio of oleic acid contained in the control agent is 3.0 to 35.0 times the composition ratio of stearic acid contained in the control agent.

8. The method for controlling blue ants according to claim 7, characterized in that the viscosity of the control agent is 30 mPa·s or more and 60 mPa·s or less.

Images