JP2012067027A - Aqueous gel composition, gel insecticide, method of killing insect pests, and insecticide tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gel insecticide and an insecticide tool having an aqueous gel as a base material and capable of exhibiting constantly insecticidal effect for a long period.SOLUTION: The gel insecticide is composed of an aqueous gel composition containing 0.1-5 wt.% of a gelling agent, 5-65 wt.% of glycerol, and an aqueous solvent and further an insecticide component. The insecticide tool has a constitution in which by filling the gel insecticide 1 in a flat shaped container 3 having an open top, the gel insecticide is exposed over the whole open surface 2 of the container. While the surface shrinkage of the gel by water evaporation is highly suppressedand, then the gel is reduced only in the thickness even when left being filled in the open container; thereby the surface area is kept as it is.

Description

  The present invention relates to an aqueous gel composition, a gel insecticide, a method for killing pests, and an insecticide, and more particularly, shrinkage due to evaporation of moisture is highly suppressed, and maintenance of a surface area after filling a container. The present invention relates to an aqueous gel composition having excellent properties, a gel insecticide based on the gel composition, a method for insect pests using the gel insecticide, and an insecticidal device provided with the gel insecticide.

  2. Description of the Related Art As insecticides and insecticide tools for controlling flying insects such as fly flies, those that attract flying insects with an attractant and kill them are known. For example, an insecticidal tool is known in which a gel-like insecticide containing an attracting substance and an insecticidal component in a base material made of an aqueous gel is contained in a container (for example, Patent Document 1). By placing this insecticidal device on a horizontal surface such as a floor, flying insects such as fly flies can be attracted to the gel surface and can be killed and controlled.

  In general, an aqueous gel used as a base material for insecticides and fragrances shrinks as a whole due to the evaporation of water over time. 6 (a) to 6 (c) are views for explaining the shrinkage mode of a conventional general aqueous gel composition, and FIG. 7 is a cross-sectional view showing a state in which a flat container is erected. 6 and 7, the vertical direction is the vertical direction. That is, for example, as shown in FIG. 6A, when the aqueous gel 101 is filled to a predetermined depth in a flat container 3 whose upper side is open, the gel surface 102 covers the entire open surface of the container 3 at the time of filling. Although it is in a covered state (FIGS. 6A and 6B), shrinkage occurs from all directions in the horizontal direction and the thickness direction as the evaporation of water proceeds with time (FIG. 6C), and the gel surface The surface area 102, that is, the area (exposed area) where the aqueous gel 101 comes into contact with air becomes small, and the performance as an insecticide or the like cannot be sufficiently exhibited over a long period of time. Further, when the gel contracts due to the evaporation of moisture, as shown in FIG. 6 (c), the gel peels off from the container containing the gel, and a gap is formed. As a result, it is difficult to stably fix the gel in the container. Therefore, for insecticides and the like based on a general aqueous gel, the container 3 can be used only in an attitude in which the container 3 is opened upward as shown in FIGS. 6 (a) to 6 (c). 7 is difficult to use in a posture in which the container 3 is erected (the posture in which the container 3 is opened in the horizontal direction), and there is a limitation in the installation method. In FIG. 7, only the container 3 is shown, and illustration of the peeled aqueous gel 101 is omitted.

JP 2007-254363 A

  As described above, there is a demand for gel insecticides that can maintain the insecticidal effect for a longer period of time and can be installed more freely. Accordingly, the present invention provides a gel-like insecticide and an insecticide based on an aqueous gel that can stably exert an insecticidal effect over a long period of time, and at the same time, the surface shrinkage of the gel due to evaporation of moisture is highly suppressed. Another object of the present invention is to provide an aqueous gel composition suitable as a base material for insecticides and fragrances, in which the surface area of the gel surface is maintained over a long period of time.

  The present inventors diligently studied to develop a gel-like insecticide in which gel shrinkage, particularly gel surface shrinkage, is highly suppressed. As a result, it has been found that by containing glycerin in the gel base material, gel shrinkage, particularly gel surface shrinkage, can be highly suppressed, and the above-described problems can be solved. That is, the present invention provided to solve the above problems is as follows.

  The invention according to claim 1 is an aqueous gel composition containing a gelling agent, glycerin and an aqueous solvent, wherein the content of the gelling agent in the composition is 0.1 to 5% by weight, glycerin Is an aqueous gel composition characterized by having a content of 5 to 65% by weight.

  The present invention relates to an aqueous gel composition containing a gelling agent, glycerin and an aqueous solvent, and the content ratio of the gelling agent and glycerin in the composition is within a specific range. In the aqueous gel composition of the present invention, the surface shrinkage of the gel due to the evaporation of moisture is highly suppressed by the action of the gelling agent in a specific concentration range and glycerin. Therefore, for example, even if it is left in a state where it is filled in a container having an open top surface, the thickness of the gel is reduced and the surface area (exposed area) is maintained as it is. As a result, when the aqueous gel composition of the present invention is used as a base material such as a gel insecticide, the effect of insecticide and the like is stably maintained over a long period of time. The gel does not dry and harden in a short period of about one month.

  The above-mentioned “aqueous solvent” is most preferably water alone, and is a water comprising an organic solvent compatible with both water and glycerin and water as long as the objects and effects of the present invention are not impaired. Although a mixed solution of organic solvents may be used, in such a mixed solution, it is preferable that at least water is a main component, and the ratio of water in the mixed solution is more preferably 70% by weight or more.

  The invention according to claim 2 is the aqueous gel composition according to claim 1, wherein the gelling agent is gellan gum.

  In the aqueous gel composition of the present invention, the gelling agent is gellan gum. The aqueous gel composition of the present invention is excellent in elasticity, particularly difficult to peel from the filled container, and has a high degree of freedom in the container installation method.

  The invention according to claim 3 is the aqueous gel composition according to claim 1 or 2, wherein the glycerin content is 15 to 55% by weight.

  Also in the aqueous gel composition of the present invention, peeling from the filled container is not particularly likely to occur, and the degree of freedom of the container installation method is high.

  The invention according to claim 4 is a gelled insecticide comprising the aqueous gel composition according to any one of claims 1 to 3 and further containing an insecticidal component.

  The present invention relates to a gel insecticide, and is the above-described aqueous gel composition of the present invention, comprising an aqueous gel composition further containing an insecticidal component. That is, also in the gel insecticide of the present invention, the content of the gelling agent in the composition (that is, in the gel insecticide) is 0.1 to 5% by weight, and the content of glycerin is 5 to 65% by weight. is there. Even if the gel-like insecticide of the present invention is left in a state of being filled in a container, the gel thickness is only reduced and the surface area (exposed area) is maintained as it is. Therefore, the insecticidal effect can be maintained for a long time.

  The invention according to claim 5 is the gel insecticide according to claim 4, further comprising an attracting substance.

  According to the gel-like insecticide of the present invention, the insect pests can be attracted to the gel surface and killed, so that the insects can be killed efficiently. In the present invention, the gelling agent content in the composition (that is, in the gelled insecticide) is 0.1 to 5% by weight, and the glycerin content is 5 to 65% by weight.

  The invention according to claim 6 is the gel insecticide according to claim 4 or 5, wherein the insecticidal component is non-transpirationable.

  According to the gel insecticide of the present invention, pests can be killed by ingesting the gel.

  The gel insecticide according to claim 6, wherein the insecticidal component is a neonicotinoid compound (claim 7).

  The gel insecticide according to claim 7, wherein the insecticidal component is water-soluble (claim 8).

  The gel insecticide according to any one of claims 4 to 8, wherein the content of the insecticide component in the gel insecticide is 0.05 to 5% by weight (claim 9).

  6. The gel insecticide according to claim 5, wherein the content of the attractant in the gel insecticide is 0.01 to 20% by weight (claim 10).

  The invention described in claim 11 is a pest insect killing method, wherein the insect pest is killed by contacting or ingesting the gel insecticide according to any one of claims 4-10. is there.

  The present invention relates to a method for killing insect pests, and the insect pests are killed by contacting or ingesting the above-described gel insecticide of the present invention. According to the insect pest killing method of the present invention, the insect pest can be stably killed over a long period of time.

  The invention described in claim 12 is an insecticidal tool comprising the gel insecticide according to any one of claims 4-10.

  The present invention relates to an insecticidal device and is characterized by including the above-described gelled insecticide of the present invention. According to the insecticidal device of the present invention, insect pests can be stably killed over a long period of time.

  The invention according to claim 13 is characterized in that a flat container having an open top is filled with the gel insecticide, and the gel insecticide is exposed over the entire open surface of the container. An insecticidal device according to claim 12.

  In the insecticidal device of the present invention, since the gel-like insecticide is filled in a flat container and is exposed over the entire open surface of the container, the surface area (exposed area) of the gel can be set large. it can. Furthermore, even if it is used for a long time, the thickness of the gel is reduced and the surface area of the gel is maintained as it is. According to the insecticidal device of the present invention, insect pests can be efficiently killed over a long period of time.

  The invention according to claim 14 is further provided with a protection member that covers the open surface of the container, and the protection member has an opening through which a pest can pass. .

  Since the insecticidal device of the present invention is provided with a protective member, the possibility that the user directly touches the gel surface is low, and the safety in handling is high. Furthermore, since the protective member has an opening, it does not inhibit the pests from reaching the gel surface.

  The invention according to claim 15 is the insecticidal device according to claim 13 or 14, characterized in that the container can be used in a posture that opens horizontally.

  The insecticidal device of the present invention can be used in a posture in which a flat-shaped container is opened in the horizontal direction, and the open surface is sideways as well as the posture in which the open surface of the container (that is, the gel surface) faces upward. It can also be used in a posture (a posture where the open surface faces the vertical surface). Therefore, in addition to placing on the floor or the like, it can be used by methods such as standing in the vertical direction, hanging down, and sticking to the wall surface, and there is no restriction on the installation method and the degree of freedom is high.

  According to the aqueous gel composition of the present invention, the surface shrinkage of the gel due to the evaporation of moisture is highly suppressed. Therefore, even if left in a container for a long time, the thickness of the gel is reduced and the surface area (exposed area) is maintained as it is. The insecticidal effect is sustained. In particular, according to the constitution in which the gelling agent is gellan gum or the constitution in which the content of glycerin is 15 to 55% by weight, it is excellent in elasticity, and peeling from the filled container is not particularly likely to occur. High degree of freedom.

  According to the gel insecticide of the present invention, even if the container is left in a state of being filled, the thickness of the gel is reduced and the surface area (exposed area) is maintained as it is. Therefore, the insecticidal effect can be maintained for a long time.

  The same applies to the insecticidal method of the present invention, and the insect pests can be stably killed over a long period of time.

  The same applies to the insecticidal device of the present invention, and insect pests can be stably killed over a long period of time.

It is sectional drawing explaining the shrinkage | contraction mode at the time of filling the flat type container with the aqueous gel composition of this invention, (a) is the state at the time of filling, (b) shows the state after shrinkage | contraction. It is a front view which shows the insecticidal tool which concerns on one Embodiment of this invention. It is a disassembled perspective view of the insecticide tool of FIG. 2 in a basic posture. It is AA sectional drawing of FIG. 2, and shows the state of the container and gelatinous insecticide in the attitude | position which stood the insecticide tool in the perpendicular direction. It is a figure explaining the installation method of the insecticidal tool of FIG. 2, (a) shows the case where it places on a horizontal surface, (b) shows the case where it hangs, (c) shows the case where it sticks to a vertical surface. It is a figure explaining the shrinkage | contraction mode of the conventional common aqueous gel composition, (a) is a perspective view which shows the state which filled the aqueous gel composition in the flat container, (b) is sectional drawing of (a). (C) is sectional drawing explaining the state after shrinkage | contraction. It is sectional drawing which shows the state which stood the flat container.

  The aqueous gel composition of the present invention is an aqueous gel composition containing a gelling agent, glycerin and an aqueous solvent. The content of the gelling agent in the composition is 0.1 to 5% by weight, glycerin. The content of is 5 to 65% by weight.

First, the physical characteristics of the aqueous gel composition of the present invention will be described. 1 to 5, the vertical direction is the vertical direction unless otherwise specified. As described above, the aqueous gel composition of the present invention is one in which the surface contraction of the gel due to the evaporation of moisture is highly suppressed by the action of the gelling agent in a specific concentration range and glycerin. Even if the container is left in a state of being filled, the thickness of the gel is reduced and the surface area (exposed area) is maintained as it is. As an example of the case where the aqueous gel composition is filled to a predetermined depth in a flat container as shown in FIG. 6A, as described above, in the case of the conventional general aqueous gel composition 101 , Shrinkage occurs from all directions of the gel as the evaporation of moisture proceeds (FIG. 6C). As a result, the surface area (exposed area) of the gel surface 102 becomes smaller than that at the time of filling (FIG. 6B), and the surface area is not maintained. Moreover, it peels from the wall surface of the container 3, and a clearance gap arises. Furthermore, as the drying proceeds, the gel itself hardens and loses its elasticity.
On the other hand, in the aqueous gel composition 1 of the present invention, gel shrinkage occurs only in the thickness direction, as shown in FIGS. As a result, the surface area of the gel surface 2 is maintained even when moisture evaporates (FIG. 1B). Moreover, since shrinkage | contraction (width direction) does not occur from the peripheral part of a gel, it peels from the wall surface of the container 3, and a clearance gap does not arise. Furthermore, hardening of the gel itself is also suppressed and elasticity is maintained. The aqueous gel composition of the present invention has the above-mentioned characteristics because the moisture retention of glycerin in a specific concentration range causes the evaporation of water to proceed very slowly, and the surface of the gel and the contact surface with the container wall are always “ The main factor is considered to be “wet”.

  As described above, the glycerin content in the aqueous gel composition of the present invention is in the range of 5 to 65% by weight, and is not particularly limited as long as it is within this range, but is preferably 15 to 55% by weight. That is, when the content of glycerin is 15 to 55% by weight, peeling from the container is particularly difficult to occur in a state where the container is filled. According to this preferred embodiment, the gel can maintain the surface area and peel from the wall surface of the container even when the container is kept in a vertical direction (that is, in a posture in which the gel surface faces the vertical surface) for a long time. Absent. Therefore, the container can be used for a long period of time by a method such as placing the container upright in the vertical direction, suspending it, or attaching it to a wall surface.

  The glycerin constituting the aqueous gel composition of the present invention does not act as a solvent or a dispersant / emulsifier as an active ingredient, but is included for imparting specific physical properties to the gel itself. . That is, the property that the surface shrinkage of the gel due to the evaporation of water as described above is highly suppressed and the surface area is maintained for a long time in a state where the container is filled is achieved by containing 5% by weight or more of glycerin. Is done.

The gelling agent used in the aqueous gel composition of the present invention is not particularly limited, and various gelling agents such as gellan gum, carrageenan, pectin, and agar can be used. These gelling agents may use only 1 type and may use 2 or more types together.
In a preferred embodiment, the gelling agent is gellan gum. By using gellan gum, the elasticity and strength of the gel are improved, and the aqueous gel composition is more suitable for use in the above-described vertical direction (the posture in which the gel surface is oriented in the horizontal direction). Various types of gellan gum can be used, such as deacylated gellan gum and native gellan gum, but the use of deacylated gellan gum is particularly preferred.
As a method for measuring the hardness of the gel, there is a method using a type SRIS durometer defined in Japanese Industrial Standard S6050. And when it is about 3-30 in the measurement by this method, it becomes an elastic gel. In the present invention, the gel having elasticity of about 3 to 30 can be easily obtained by using gellan gum.

  The embodiment in which gellan gum is used as the gelling agent and the glycerin content is 15 to 55% by weight is particularly excellent in the elasticity and strength of the gel.

  As described above, the content of the gelling agent in the aqueous gel composition of the present invention is in the range of 0.1 to 5% by weight, and is not particularly limited as long as it is within this range, but more preferably 0.5 to 3% by weight.

The aqueous gel composition of the present invention contains an aqueous solvent. Here, the “aqueous solvent” may be water alone as described above, or may be a mixed solution of an organic solvent-water composed of an organic solvent compatible with both water and glycerin and water. .
In addition, as an additive to be described later, an additive such as alcohol, vinegar or the like which itself contains an alcohol component, a compound corresponding to the organic solvent such as acetic acid, water, or an attractant containing both of them. Can be an aqueous solvent or contain a part of the aqueous solvent, and if the blending ratio of these additives is high, the amount of alcohol component and the amount of water in the additive are adjusted to the organic content in the aqueous solvent. It is necessary to consider these addition amounts as part of the aqueous solvent, including the amount of solvent and water.

  The method for producing the aqueous gel composition of the present invention, particularly the gelation method, can be appropriately selected depending on the type of gelling agent to be employed. For example, when the gelling agent is deacylated gellan gum, carrageenan, pectin, or agar, a predetermined amount of gelling agent, a predetermined amount of glycerin, and an aqueous solvent are mixed, and other components (if necessary) Add and mix insecticidal and aromatic ingredients. When the other component is hardly soluble, it is dispersed uniformly. Further, add an alkali metal salt (potassium salt, etc.) or alkaline earth metal salt (calcium salt, etc.), raise the temperature to the gel dissolution temperature of each gelling agent, and warm until the gelling agent dissolves uniformly. To do. The addition amount of the alkali metal salt or alkaline earth metal salt is, for example, 50 to 300 ppm as a final concentration. After dissolution of the gelling agent, the temperature is gradually lowered to below the gel dissolution temperature of each gelling agent and gelled to obtain an aqueous gel composition. When a transpiration additive (for example, a transpiration attractant described later) is added to the gel, it may be added while the temperature is lowered (for example, at a time of 55 to 65 ° C.).

  The aqueous gel composition of the present invention can be used for various applications. For example, by using it as a base material for insecticides, fragrances, deodorants and the like, it is possible to provide various gel products that have a high degree of freedom in installation methods and are easy to use.

  The gel-like insecticide of the present invention is the above-described aqueous gel composition of the present invention, which is an aqueous gel composition further containing an insecticidal component. Also in the gel insecticide of the present invention, the gelling agent content in the composition (in the gel insecticide) is 0.1 to 5% by weight, and the glycerin content is 5 to 65% by weight.

  The insecticidal component may be either transpirationable or non-transpirationable, but is preferably non-transpirationable. Although various things can be used as a non-transpiration insecticidal component, a neonicotinoid type compound is especially preferable. Examples of neonicotinoid compounds include clothianidin, acetamiprid, imidacloprid, thiacloprid, dinotefuran, nitenpyram, thiamethoxam and the like. About an insecticidal component, only 1 type may be used and 2 or more types may be used together.

  In a preferred embodiment, the insecticidal component is water soluble. Thereby, an insecticidal component will be in the form which melt | dissolves in a base material (aqueous gel composition), and is stably hold | maintained in a base material. Even when the insecticidal component is not water-soluble, the insecticidal component can be retained in the substrate by using an organic solvent, a dispersant, a surfactant, or the like.

  The content of the insecticidal component is not particularly limited, and may be appropriately selected depending on the type of insect pests, the type of insecticidal component, etc. Preferably, the content in the gelled insecticide is 0.05 to 10% by weight. %, More preferably 0.1 to 5% by weight.

  The gel-like insecticide of the present invention preferably further contains a pest attractant. The attracting substance may be either transpirationable or non-transpirationable. Examples of the transpiration attractant include various flavors such as fruit flavors and fermented food flavors; alcoholic beverages; vinegars; fermented foods; various organic acids such as acetic acid and propionic acid; ethanol and the like. Examples of non-transpiration attractants include dairy products, dry yeast, sake lees, sucrose, brown sugar, dextrin, starch sugar, honey, glucose, sorbit, glycols, and the like. The content of the attracting substance is not particularly limited and varies depending on conditions such as the kind of attracting substance and the content of the active ingredient, but in general, the content in the gel insecticide is in the range of 0.01 to 20% by weight. It is.

  The gel-like insecticide of the present invention may further contain other components. Examples of other components include stabilizers, thickeners, preservatives, colorants, anti-swallowing agents and the like.

Examples of the stabilizer include antioxidants such as dibutylhydroxytoluene (BHT) and butylhydroxyanisole (BHA), ascorbic acid, and the like.
Examples of thickeners include guar gum, xanthan gum, locust bean gum, tamarind gum, carboxymethyl cellulose (CMC), and the like.
Examples of preservatives include sorbic acid, sorbate, parahydroxybenzoates, thiabendazole, and the like.
Examples of the colorant include caramel pigment, gardenia pigment, anthocyanin pigment, safflower pigment, flavonoid pigment, red No. 2, red No. 3, yellow No. 4, yellow No. 5, and the like.
Examples of the accidental ingestion agent include denatonium benzoate.

  As a method for producing the gel insecticide of the present invention, a method similar to the above-described method for producing the aqueous gel composition of the present invention can be employed. That is, when the gelling agent is deacylated gellan gum, carrageenan, pectin, or agar, a predetermined amount of gelling agent, a predetermined amount of glycerin, and an aqueous solvent are mixed, and further, an insecticidal component and, if necessary, Add and mix other ingredients. If insecticidal ingredients and other ingredients are sparingly soluble, disperse them uniformly. Subsequently, after adding an alkali metal salt or an alkaline earth metal salt and raising the temperature to the gel dissolution temperature of each gelling agent to uniformly dissolve the gelling agent, to below the gel dissolution temperature of each gelling agent Reduce temperature and gel. A transpiration attractant such as a fragrance may be added during the cooling.

  The insecticidal method of the present invention kills pests by contacting or ingesting the above-described gel-like insecticide of the present invention. Examples of the method for contacting or ingesting the pest include a method in which the gel-like insecticide of the present invention is held on an appropriate support, the gel surface is exposed, and the pest is installed at a place where the pest is to be controlled. That is, when a pest approaches the gel surface and contacts or ingests the gel, the pest dies on the spot. The support is typically a container having an open upper surface as described below, but is not limited thereto.

  The insecticidal device of the present invention comprises the above-described gel-like insecticide of the present invention. Embodiments of the gel insecticide of the present invention will be described with reference to the drawings. In the following description, a posture in which the flat container 13 is opened upward (a posture in which the front of the insecticidal device 10 faces upward) is referred to as a “basic posture”, and a posture in which it is opened in a horizontal direction is referred to as a “standing posture”. I will do it. 2 is a front view showing an insecticidal device according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the insecticidal device of FIG. 2 in a basic posture.

The insecticide tool 10 shown in FIGS. 2 and 3 has a structure in which a flat container 13 is filled with a gel insecticide 11 and further covered with a cover (protective member) 15.
The container 13 is a container having a flat shape with a substantially rectangular bottom surface, and has a shape like a tray or a lunch box. That is, the container 13 is opened upward in the basic posture.
The container 13 is filled with the gel insecticide 11 to a predetermined depth, and the surface 12 of the gel insecticide 11 is exposed over the entire open surface of the container 13. The gel insecticide 11 is a gel insecticide of the present invention containing glycerin in a specific concentration range, and gellan gum is used as a gelling agent. The gel-like insecticide 11 is one in which surface contraction of the gel due to evaporation of moisture is highly suppressed, the surface area (exposed area) of the surface 12 is maintained over a long period of time, and peeling from the inner wall surface of the container 13 is performed. Does not happen. The gel insecticide 11 contains an attractant in addition to the insecticidal component. The filling amount of the gel insecticide 11 is up to about half the depth of the container 13, and the thickness of the gel insecticide 11 is smaller than the depth of the container 13.

The cover 15 covers the container 13 from the open surface side like a lid. A rectangular slit (opening) 16 is provided in front of the cover 15. Therefore, even when the container 13 is covered with the cover 15, the pest can reach the gel surface 12 through the slit 16. A total of two slits 16 are provided, one at the approximate center in the front view of the cover 15 and one above the center. The distance from the slit 16 to the surface 12 of the gel is about one half of the depth of the container 13.
A protrusion 17 having a hole is provided on the top surface of the cover 15. The protrusion 17 is used for passing a string or the like when the insecticide tool 10 is suspended and used.

  The usage method of the insecticidal tool 10 of this embodiment is demonstrated. The insecticidal device 10 is basically installed at a place where it is desired to control insects such as fly flies, and attracts and controls insects on the surface 12 of the gel. As an installation method, the cover 13 may be placed on a horizontal surface such as a floor in a posture (basic posture, FIG. 3) in which the front surface of the cover 15 is upward as in the case of a conventional general insecticide tool. Installation in a posture that opens in the direction (a posture in which the gel surface 12 faces the vertical surface), that is, a posture that stands in the vertical direction (standing posture) is preferable because the area required for the installation becomes small. 4 is a cross-sectional view taken along the line AA of FIG. 2 and shows the state of the container 13 and the gel-like insecticide 11 in the insecticidal device 10 in a standing posture. That is, in this embodiment, even if the insecticidal device 10 is installed in a standing position, the gel-like insecticide 11 is stably held in the container 13 and is not biased downward or collapsed. Further, even when moisture evaporates, the surface 12 is maintained in the surface area because it contracts only in the thickness direction.

  A pest such as a fly is attracted to the insecticidal device 10 in a standing posture (FIG. 4) and reaches the surface 12 of the gel through the slit 16. Pests that reach the surface 12 ingest the gel-like insecticide 11 and die on the spot. Although the dead pest falls down along the surface 12 of the gel, in this embodiment, since the thickness of the gel-like insecticide 11 is smaller than the depth of the container 13, a pest carcass accumulates on the inner wall surface 18 of the container 13, It will not fall outside.

  A specific example in which the insecticidal device 10 is installed in a standing state (standing position) is shown in FIG. FIG. 5 (a) shows an example in which it is placed on a horizontal surface 21 such as a floor, and the bottom surface of the insecticidal device 10 is set so as to contact the horizontal surface 21. FIG. 5B shows an example of suspending, and the suspending part 17 is suspended from the ceiling 22 through a string or the like. FIG. 5C shows an example of pasting on a vertical surface 23 such as a wall, and pasting so that the back surface of the insecticidal tool 10 (bottom surface of the container 13) is in contact with the vertical surface 23 with the protrusion 17 being in an upward position. .

  In the above-described embodiment, the bottom shape of the flat container (container 13) is substantially rectangular, but other shapes may be used. For example, a petri dish container with a circular bottom shape may be used, or a dish container may be used. In the embodiment described above, two rectangular slits 16 are provided as openings, but the shape and number of openings are not limited. For example, a lattice-shaped or mesh-shaped opening may be used.

  Examples of the pests to be killed by the gel-like insecticide of the present invention, the insect pesticide method, and the insecticide tool include fruit flies belonging to Drosophila such as Drosophila and Drosophila, flies belonging to Drosophila and Drosophila Can be mentioned. Other examples include flies belonging to the family Drosophilidae and Drosophila.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples. In the following examples, “parts” means parts by weight.

[Example 1]
1 part of deacylated gellan gum (gelling agent), 10 parts of glycerin, 0.2 part of clothianidin (insecticide) and 82.8 parts of water are mixed, and 2 parts of 1% potassium chloride solution is added dropwise and stirred. Then, the mixture was heated to 90 ° C. and mixed to be uniform. The mixture was gradually cooled, and when the temperature dropped to 55 ° C., 2 parts of banana flavor (attracting substance) and 2 parts of acetic acid (attracting substance) were added dropwise and mixed uniformly. 25 g of this mixed solution was filled into a flat container (made of polystyrene resin, length 7 cm, width 4.5 cm, depth 1.2 cm) opened at the top, and solidified (gelled) as it was (thickness: about 0.1 mm). 9 cm). The container filled with the gel was erected in the vertical direction so that the flat container was opened in the horizontal direction (standing position) and left at room temperature for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

[Example 2]
Example 1 except that 1 part of deacylated gellan gum, 60 parts of glycerin, 0.2 part of clothianidin, 32.8 parts of water, and 2 parts of yogurt flavor (attractant) instead of 2 parts of banana flavor The gel was filled in the container. In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

Example 3
1 part of deacylated gellan gum, 0.2 part of native gellan gum (gelling agent), 20 parts of glycerin, 0.2 part of clothianidin, 72.6 parts of water, propionic acid (attractant) 2 instead of 2 parts of acetic acid The gel was filled in the container in the same manner as in Example 1 except that the part was used. In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

Example 4
Mix 1 part of deacylated gellan gum, 30 parts of glycerin, 0.2 part of guar gum (thickener), 0.2 part of clothianidin, 57.6 parts of water, 5 parts of sugar (attractant), and 1% chloride. 2 parts of a potassium solution was added dropwise and heated to 90 ° C. with stirring to mix uniformly. The mixture was gradually cooled, and when the temperature dropped to 55 ° C., 2 parts of a sake flavor (attracting substance) and 2 parts of acetic acid were added dropwise and mixed uniformly. 25 g of this mixture was filled into a flat container (made of polystyrene resin, length 7 cm, width 4.5 cm, depth 1.2 cm) opened at the top, and solidified (gelled) as it was (thickness: about 0.9 cm). ). The container filled with the gel was erected in the vertical direction so that the flat container was opened in the horizontal direction (standing position) and left at room temperature for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

Example 5
The container was filled with the gel in the same manner as in Example 2 except that 50 parts of glycerin and 42.8 parts of water were used. In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

Example 6
The container was filled with gel in the same manner as in Example 5 except that 1 part of carrageenan (gelator) was used instead of 1 part of deacylated gellan gum. In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the thickness of the lower part was slightly increased in the gel container, but the surface shape (surface area) was maintained as it was.

Example 7
1 part of pectin (gelling agent), 50 parts of glycerin, 0.2 part of clothianidin and 42.8 parts of water were mixed and heated to 60 ° C. with stirring to mix uniformly. The mixture was gradually cooled, and when the temperature decreased to 40 ° C., 2 parts of a 1% potassium chloride solution, 2 parts of yogurt flavor, and 2 parts of acetic acid were added dropwise and mixed uniformly. 25 g of this mixture was filled into a flat container (made of polystyrene resin, length 7 cm, width 4.5 cm, depth 1.2 cm) opened at the top, and solidified (gelled) as it was (thickness: about 0.9 cm). ). In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the thickness of the lower part was slightly increased in the gel container, but the surface shape (surface area) was maintained as it was.

Example 8
4.7 parts of deacylated gellan gum, 20 parts of glycerin, 0.2 part of clothianidin, 2 parts of 1% potassium chloride solution and 73.1 parts of water were mixed uniformly at room temperature (25 ° C.). 25 g of this mixture was filled into a flat container (made of polystyrene resin, length 7 cm, width 4.5 cm, depth 1.2 cm) opened at the top, and solidified (gelled) as it was (thickness: about 0.9 cm). ). In the same manner as in Example 1, the container was set up in the vertical direction and left for 2 weeks. As a result, the thickness of the lower part was slightly increased in the gel container, but the surface shape (surface area) was maintained as it was.

Example 9
1.2 parts of agar (gelling agent), 30 parts of glycerin, 0.15 part of clothianidin and 37.65 parts of water were mixed and heated to about 80-90 ° C. and mixed uniformly. The heating was stopped and the mixture was gradually cooled. When the temperature dropped to 60 ° C., 20 parts of vinegar (acetic acid content of about 5%) and 11 parts of wine liquor were added and mixed uniformly. 35 g of this mixture was filled in a circular petri dish (made of polystyrene resin, inner diameter 90 mm, depth 10 mm) and solidified (gelled) as it was. When allowed to stand at room temperature for one month, the gel thickness decreased from 5.2 mm (at the time of filling) to 2.9 mm, but the surface area was maintained as it was. Moreover, the elasticity of the surface was maintained, and the aroma of sake and vinegar remained.

Example 10
Mix 1 part of deacylated gellan gum, 30 parts of glycerin, 0.2 part of clothianidin, 56.8 parts of water and 5 parts of sugar, add 2 parts of 1% potassium chloride solution dropwise and heat to 90 ° C with stirring. And mixed to be uniform. The liquid mixture was gradually cooled, and when the temperature decreased to 55 ° C., 2 parts of sake flavor, 2 parts of yogurt flavor, and 1 part of propionic acid were added dropwise and mixed uniformly. 25 g of this mixture was filled into a flat container (made of polystyrene resin, length 7 cm, width 4.5 cm, depth 1.2 cm) opened at the top, and solidified (gelled) as it was (thickness: about 0.9 cm). ). The container filled with the gel was erected in the vertical direction so that the flat container was opened in the horizontal direction (standing position) and left at room temperature for 2 weeks. As a result, the surface shape (surface area) of the gel was maintained as it was, and the gel was held in the container as it was without peeling off from the container wall surface.

[Comparative Example 1]
A flat container was filled with the gel in the same manner as in Example 1 except that 0 part of glycerin (not added) and 92.8 parts of water were used. The container filled with the gel was set up in the vertical direction so that the flat container opened in the horizontal direction (standing position) and left as it was. However, the gel was not stably held in the container, and the gel dropped from the container after one day.

[Comparative Example 2]
A flat container was filled with the gel in the same manner as in Example 1 except that 70 parts of glycerin and 22.8 parts of water were used. However, the gel was very soft and fluid, and the gel fell as soon as it stood in the vertical direction.

[Comparative Example 3]
A circular petri dish was filled with the gel in the same manner as in Example 9 except that 0 part of glycerin (not added) and 67.65 parts of water were used. When allowed to stand at room temperature for one week, the gel thickness decreased from 5.2 mm (at the time of filling) to a 0.3 mm film, and the evaporation of water was intense.

[Comparative Example 4]
A flat container was filled with the gel in the same manner as in Example 10 except that 0 part of glycerin (not added) and 86.8 parts of water were used. When the container filled with the gel was allowed to stand at room temperature for 2 weeks, the gel thickness was reduced from 5.2 mm to a film of about 0.1 mm, and the evaporation of water was intense.

  Table 1 shows the names of the components and the blending ratio (parts by weight) of the gel insecticides prepared in Examples 1 to 10 and Comparative Examples 1 to 4.

[Test example]
Using the gel insecticides prepared in Example 10 and Comparative Example 4, the following tests were conducted.

  According to the procedure described in Example 10 or Comparative Example 4, 25 g of the gel-shaped insecticide of Example 10 or Comparative Example 4 was filled in a polyethylene circular cup container having a diameter of 65 mm and a depth of 25 mm. Each container was left at room temperature for 2 weeks. On the other hand, 55 adults (Example 10) or 59 (Comparative Example 4) of Drosophila melanogaster were released in a cube pipe cage (side 50 cm) covered with nylon cloth.

  In a cage, consists of one gel-like insecticide (Example 10 or Comparative Example 4), and agar medium for breeding fly fly filled with petri dishes (control medium; 5 g yeast powder, 5 g sugar, 1 g agar, and 100 g ion-exchanged water. ) One was installed and maintained at room temperature (about 25 ° C.). After 24 hours from the installation, the number of dead insects attracted to the gel-like insecticide in each cage was investigated.

  As a result, in the case of the gel insecticide of Example 10, 42 out of 55 (76%) were attracted and killed, and sufficient attracting performance and insecticidal performance were maintained. On the other hand, in the case of the gel-like insecticide of Comparative Example 4, only 12 out of 59 (20%) were attracted and killed, and the attracting performance and insecticidal performance were extremely inferior.

DESCRIPTION OF SYMBOLS 1 Aqueous gel composition 10 Insecticide tool 11 Gel-like insecticide 13 Container 15 Cover (protection member)
16 Slit (opening)

Claims (15)

  It is an aqueous gel composition containing a gelling agent, glycerin, and an aqueous solvent. The gelling agent content in the composition is 0.1 to 5% by weight, and the glycerin content is 5 to 65% by weight. An aqueous gel composition characterized by the above.   The aqueous gel composition according to claim 1, wherein the gelling agent is gellan gum.   The aqueous gel composition according to claim 1 or 2, wherein the glycerin content is 15 to 55 wt%.   A gelled insecticide comprising the aqueous gel composition according to any one of claims 1 to 3, further comprising an insecticidal component.   The gel insecticide according to claim 4, further comprising an attractant.   The gel insecticide according to claim 4 or 5, wherein the insecticide component is non-transpirationable.   The gel insecticide according to claim 6, wherein the insecticidal component is a neonicotinoid compound.   The gel insecticide according to claim 7, wherein the insecticidal component is water-soluble.   The gel insecticide according to any one of claims 4 to 8, wherein the content of the insecticide component in the gel insecticide is 0.05 to 5% by weight.   6. The gel insecticide according to claim 5, wherein the content of the attractant in the gel insecticide is 0.01 to 20% by weight.   A method for killing pests comprising killing the pests by contacting or ingesting the gel insecticide according to any one of claims 4 to 10.   An insecticidal tool comprising the gelled insecticide according to any one of claims 4 to 10.   13. The insecticidal device according to claim 12, wherein the gel-like insecticide is filled in a flat container having an open top, and the gel-like insecticide is exposed over the entire open surface of the container.   The insecticide tool according to claim 13, further comprising a protective member that covers an open surface of the container, wherein the protective member has an opening through which a pest can pass.   The insecticidal device according to claim 13 or 14, wherein the container can be used in a posture that opens horizontally.

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