JP2013028646A - Composition for controlling gastropod, and manufacturing method of controlling agent for gastropod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composition for controlling gastropods, which is stably efficacious for gastropods over long periods.SOLUTION: The composition for controlling gastropods contains a water-insoluble resin, water-soluble resin, and solid gastropod controlling agent. The controlling agent is water-soluble, consisting of anhydrous aluminum sulfate. These materials are kneaded and extrusion-molded in a dry state by a heat melt extrusion method using a resin extruder.

Description

  The present invention relates to a composition and a control agent for controlling gastropods such as slugs and snails.

  Gastropods such as slugs and snails eat leaves, flowers, fruits, etc. of plants and vegetables and damage these plants. In order to prevent this, various control agents are conventionally known. For example, granule-type control agent comprising metaaldehyde as an attracting insecticide as an active ingredient, basic copper chloride, basic copper sulfate as disclosed in JP-A-3-290142 (Patent Document 1), Control agents comprising inorganic copper compounds such as copper carbonate and cupric hydroxide, and copper compounds such as organic copper compounds such as 8-hydroxyquinoline copper, pentachlorophenol copper, and nonylphenol sulfonate copper, JP-A-4-316546 As disclosed in Japanese Laid-Open Patent Publication (Patent Document 2), there is known a control molded body in which an organic phosphorus agent or carbamic acid ester is used as a control agent and is kneaded into a sheet.

JP 03-290142 A JP-A-4-316546

By the way, the above-mentioned metaldehyde is mixed with cereals and granulated, and it is widely sold as a gastropod killer. However, if gastropods do not eat, the effect is not obtained, and it is decisive for gastropods. It was not satisfactory as a control agent.

  In the above copper compounds, water-soluble copper compounds are generally deleterious and generally difficult to use, and water-insoluble copper compounds are generally effective when tested. There was a tendency to be difficult. This is thought to be because it is insoluble in water and is not easily absorbed by gastropods.

  Furthermore, since the above organic phosphorous agents and carbamic acid esters are agricultural chemicals, they have various limitations in use and have a drawback that they are very difficult to use.

  In addition, each of the above-mentioned control agents is washed away by rainwater after rain, for example, slugs often appear, and when frequently irrigated to the plant, each of the above-mentioned control agents is gradually washed away by the irrigation. A good control effect may not be sustained.

  In addition, in order to have a long-lasting repellent effect such as slugs, ribbon types that sell copper foils around flower pots and planters in a headband shape are sold. Since copper itself does not generate a sufficient amount of copper ions, the repellent property is weak and almost no substantial effect is observed.

  In addition, a sheet that is kneaded with an organic phosphorus agent or carbamic acid ester can be expected to sustain its effectiveness by bleeding little by little. Retention is not expected.

  Therefore, the present invention is to provide a control composition that is stable and effective for a long period of time for gastropods, and provides a control agent that has high control efficiency and is easy to handle.

  As an invention relating to the composition for controlling gastropods, the above-mentioned problems have been solved by including a water-insoluble resin, a water-soluble resin, and a solid gastropod control agent. As this gastropod control agent, a water-soluble one can be used.

  Since this control composition contains a water-insoluble resin, the entire control composition is not eluted by rain water or irrigation. Furthermore, since this control composition contains a water-soluble resin, the water-soluble resin elutes little by little by rainwater or irrigation. Therefore, in the initial stage, the gastropod control agent present on the surface of the control composition exhibits a control effect on gastropods. Even after the surface gastropod control agent is washed away by rainwater, irrigation, etc., the gastropod control agent present in the control composition is revealed by the gradual elution of the water-soluble resin, and the control effect on gastropods is exhibited. Demonstrate. For this reason, while being able to exhibit the control effect with respect to gastropods stably over a long period of time, the gastropod control agent inside the control composition can be used effectively.

  Moreover, anhydrous aluminum sulfate or copper gluconate can be used as a gastropod control agent. Anhydrous aluminum sulfate or copper gluconate exhibits a high gastropod control effect and is not a deleterious substance, and is easy to handle.

  According to this invention, initially, the gastropod control agent present on the surface of the control composition exhibits a control effect on gastropods. And even after the surface gastropod control agent is washed away by rain water, irrigation, etc., the gastropod control agent present inside the control composition is exposed by elution of the water-soluble resin, and exhibits the control effect on gastropods . For this reason, while being able to exhibit the control effect with respect to gastropods stably over a long period of time, the gastropod control agent inside the composition for control can be used effectively.

  Anhydrous aluminum sulfate and copper gluconate exhibit a high gastropod control effect and are easy to handle because they are not deleterious.

(A) Front view showing a control board used in the slug repellent test conducted in Example 1, (b) Front view of a slug repellent test apparatus conducted in Example 1, (c) Side view of (b) Schematic showing the criteria for the slug repellent test of Example 1 (A) Front view of the slug repellent test apparatus performed in Example 3, (b) Side view of the control plate of (a) (A)-(c) Front view which shows the example which uses the composition for control concerning this invention

  Embodiments of the present invention will be described below with reference to the drawings.

  The composition for controlling gastropods according to the present invention is a composition comprising a water-insoluble resin, a water-soluble resin, and a solid gastropod control agent.

  The gastropods include slugs, snails, mussels, and the like.

  The water-insoluble resin is not particularly limited as long as it is insoluble in water, and is not limited to olefin resins such as polyethylene and polypropylene, styrene resin, vinyl chloride resin, acrylic resin, ethylene / vinyl acetate copolymer resin, ethylene / ethyl acrylate. Examples thereof include vinyl resins such as copolymer resins and ionomer resins, polyester resins, polycarbonate resins, polyamide resins, and polyurethane resins.

  The water-soluble resin is not particularly limited as long as it is a water-soluble resin, and examples thereof include polyvinyl alcohol, polyvinyl formal, polyvinyl butyral, hydroxypropyl cellulose resin, and derivatives thereof. As this derivative, in order to impart thermoplasticity, a copolymer of each of the above resins and polyethylene, polyoxyethylene, polyoxypropylene or the like can be exemplified. Moreover, polyethylene oxide resin and polyethylene glycol resin which are polyoxyethylene itself can also be used suitably.

  The mixing ratio of the water-insoluble resin and the water-soluble resin is not particularly limited, but is preferably 98: 2 to 20:80, more preferably 95: 5 to 20:80, and still more preferably 95: 5 to 50:50. 90:10 to 50:50 is even more preferable. If the water-soluble resin is less than the above-mentioned mixing ratio, the amount of the gastropod control agent in the molded product obtained by molding the resulting control composition will be reduced and the control effect of the molded product will be reduced. Hard to last long. In addition, if the water-soluble resin is more than the above mixing ratio, when the molded product obtained by molding the resulting control composition is exposed to water for a long time, the amount of the water-soluble resin that is eluted increases. May become weak in strength and may not be able to maintain the shape of the molded product, or may occur in a large amount of the gastropod control agent in the initial stage and the control effect may not last long.

  Any agent can be used as the above-mentioned control agent for gastropods as long as it has a control effect of repelling and killing gastropods. However, since it is used by mixing with the above two types of resins, it can be avoided by contact with gastropods. In order to exhibit these control effects, a solid control agent is preferable. These solid control agents include water-insoluble or poorly water-soluble control agents and water-soluble control agents, and among these, it is more preferable to use water-soluble control agents. This is because, when in contact with gastropods, the use of a water-soluble control agent is more easily absorbed by gastropods and has a greater effect on gastropods.

  Specific examples of the water-insoluble or poorly water-soluble control agent include cupric hydroxide, 8-oxyquinoline copper, copper nonylsulfonate, copper dodecylbenzenesulfonate, pentachlorophenol copper, copper nonylphenolsulfonate, and the like. It is done. Specific examples of the water-soluble control agent include sodium chloride, sodium sulfate, sodium carbonate, trisodium phosphate, sodium silicate, sodium borate, sodium thiosulfate, sodium oleate, sodium polyacrylate, potassium chloride, and phosphoric acid. Alkali metal single salts such as potassium, alkali metal double salts such as potassium sodium tartrate, ammonium salts such as ammonium sulfate, ammonium carbonate, ammonium chloride and ammonium acetate, tin salts such as stannous chloride and stannic chloride, magnesium chloride , Magnesium sulfate, Magnesium nitrate, Magnesium acetate, Calcium chloride, Calcium nitrate and other alkaline earth metal salts, Aluminum sulfate, Aluminum potassium sulfate (Kari Alum), Aluminum ammonium sulfate (Ammonium alum) ) Aluminum single salt or double salt, copper chloride, copper sulfate, copper carbonate, copper gluconate and other copper salts, zinc chloride, zinc sulfate and other zinc salts, lead acetate and other lead salts, ferric chloride, etc. Examples include iron salts and alkali complex salts such as 2-sodium ethylenediaminetetraacetate.

  Among these, copper gluconate and aluminum salts such as aluminum sulfate are particularly preferable. Among the aluminum sulfates, anhydrous aluminum sulfate has the advantage that it does not foam during extrusion when it is kneaded using a hot melt extrusion method using a resin extruder in a dry state, and it is a water-soluble salt. It melts only gradually. For this reason, the effect lasts for a long time, which is particularly desirable. Furthermore, since these are not deleterious substances, they are easy to handle and can be handled with peace of mind. Moreover, the control effect with respect to gastropods is very high. These may be used alone or by a supporting method other than those described above. However, when they are used by kneading them with the water-insoluble resin and the water-soluble resin, they are safe and easy to handle and can maintain a high control effect for a long period of time.

  The addition amount of the gastropod control agent is not particularly limited, but is preferably 5 to 50% by weight based on the total amount of the water-insoluble resin and the water-soluble resin. If the amount is less than 5% by weight, the control effect may not be fully exhibited. Further, although it may exceed 50% by weight, 50% by weight is sufficient because the improvement of the control effect is not commensurate with the amount added.

  Furthermore, a liquid gastropod control agent can be used in combination with the solid gastropod control agent. Examples of such liquid control agents include organophosphorus drugs such as dimethyl-2,2,2-trichloro-1-hydroxyethylphosphonate, 1-naphthyl-N-methylcarbamate, 2-isopropoxyphenyl-N-methyl. Carbamates, carbamates such as 1,3,5-xylyl-N-methyl carbamate, pyrethroids, insect repellents such as DEET, and the like. When these liquid gastropod control agents are used, it is more preferable to use those encapsulated in microcapsules in order to suppress volatility.

  The control composition can be produced by a hot melt molding method, a coating method, or the like. The hot melt molding method is a method of mixing a raw material containing the water-insoluble resin, a water-soluble resin and a solid gastropod control agent, hot-melting with a resin extruder, kneading and then sheet-like, net-like, block-like It is a method of manufacturing by extrusion molding or injection molding. In addition, the above coating method comprises mixing a water-insoluble resin solution dissolved in water with a water-insoluble resin solution prepared by dissolving a water-insoluble resin in an appropriate solvent or emulsifying in water, and further adding a gastropod control agent. Is dissolved or dispersed, and the uniform mixed solution is coated on a suitable sheet such as plastic or paper, or a block such as a flower pot, and then dried to form a film or impregnate.

  The above control composition may contain other additives as necessary. For example, dispersants for uniformly dispersing gastropod control agents, antioxidants and ultraviolet absorbers for preventing deterioration of resins, various pigments and fillers for improving appearance and strength, charging Examples thereof include, but are not limited to, an antistatic agent for preventing rust, a plasticizer for increasing the flexibility of a molded product, and a lubricant for improving moldability.

  The control composition according to the present invention can be formed into various molded products such as films, sheets, and nets, and can be formed into a film shape on the surface of the molded product by coating on the surface of other molded products. Or can be impregnated. As an example, a film or sheet is produced by forming the control composition into a film or sheet, or by applying the composition to the film or sheet, and the film or sheet is directly applied to a sheet or plate. Thus, the control plates 3, 10 and the control sheet as shown in FIG. 1 (a) and FIG. 3 (a) can be obtained. For example, gastropods such as slugs can be avoided by laying them under the bowl 11 as shown in FIG.

  Further, as shown in FIG. 4 (a), even if the bowl 11 itself is molded with the above-mentioned control composition or the above-mentioned control composition is applied to the whole or a part of the surface of the bowl 11, Can avoid gastropods.

  Furthermore, as shown in FIG. 4 (b), in the case of a bowl 11 ′ having a leg 12, a leg receiving member 13 molded with the above control composition is attached to the leg 12, or as shown in FIG. 4 (c). In addition, by providing an annular belt 14 formed of the above-mentioned control composition around the trunk of the bowl 11, gastropods such as slugs can be avoided.

  Hereinafter, the present invention will be described in detail with reference to examples. However, the examples are merely illustrative and do not imply any limitation or limitation of the inventive concept. In Examples and Comparative Examples, “%” represents “% by weight”.

Example 1
An anhydrous aluminum sulfate fine powder (manufactured by Daimei Chemical Industry Co., Ltd .: Tyace S100) was used as a solid gastropod control agent. This gastropod control agent was kneaded at 180 ° C. with an LDPE resin (manufactured by Nippon Polychem Co., Ltd .: Novatec LJ900N, melt flow rate (hereinafter referred to as “MFR”) = 45) and a twin screw extruder. 50% masterbatch pellets were made.

  Next, an LDPE resin (manufactured by Nippon Polychem Co., Ltd .: Novatec LF542H, MFR = 4) and a polyvinyl alcohol resin (a copolymer of polyoxyethylene, Nippon Synthetic Chemical Industry, which can be thermoformed as a water-soluble thermoplastic resin) Co., Ltd .: Ecomaty AX2000) and the above-mentioned anhydrous aluminum sulfate master batch at 200 to 220 ° C. in a twin screw extruder at the ratio shown in Table 1 and extrusion molding from a T die. Control agent-containing sheets (1) to (8) having a thickness of 0.5 mm and a width of 10 cm were prepared. A slug repellent test was performed using each of the obtained control agent-containing sheets.

  That is, as shown in FIG. 1A, the control agent-containing sheet 1 is attached along each side of the rectangular cardboard 2 and the control plate 3 having a portion where the control agent-containing sheet 1 is not disposed at the center. Produced. And as shown in FIG.1 (b) (c), this prevention board 3 was put into the container 4 made from a polypropylene which can be sealed. Next, 10 Chakoura slugs 5 were placed in the central part of the control plate 3 surrounded by the control agent-containing sheet 1 without a gap (in FIGS. 1B and 1C, only one animal is shown). .) Further, a bait container 6 having an open upper portion containing 5 g of lettuce was disposed as the slug 5 bait inside the container 4 and outside the control plate 3. Further, in order to prevent the slugs 5 from drying and dying, water was sprayed over the entire container with a spray, and the lid was closed and placed in a dark place. After a suitable time, the position of the slug 5 was observed.

  Specifically, as shown in FIG. 2, the number of slugs 5 a at the center of the control plate 3, the number of slugs 5 b on the control agent-containing sheet 1 of the control plate 3, and the outside of the control plate 3. In addition, the number of slugs 5c in the food container 6 and the number of slugs 5d outside the food container 6 and outside the food container 6 were counted. The results are shown in Table 2. In addition, when the slug 5 is on the central part of the control plate 3 or on the control agent-containing sheet 1, it is considered that the slug 5 could not escape across the control agent-containing sheet, The ratio to the number was calculated as the escape prevention rate, and the results are shown in Table 2. This is because slugs cannot escape across the control agent-containing sheet, and it is considered that this sheet has sufficient repellent performance against slugs.

(Comparative Example 1)
Using only the LDPE resin (Novatech LF542H) used in Example 1, a sheet (9) having a thickness of 0.5 mm and a width of 10 cm was produced in the same manner as in Example 1, and the LDPE used in Example 1 was used. A sheet (10) having a thickness of 0.5 mm and a width of 10 cm was produced in the same manner as in Example 1 by using 80% of resin (Novatech LF542H) and 20% of polyvinyl alcohol resin (Ecomaty AX-2000). Using these sheets, a repellent test against slugs was conducted. The results are shown in Table 2.

(Example 2)
Sheets (4) and (8) of Example 1 were immersed in water for 2 days, and then pulled up and dried. Next, a repellent test against slugs was performed using the sheet. The results are shown in Table 3.

(Comparative Example 2)
In the production of the sheet (4), a sheet (11) having a thickness of 0.5 mm and a width of 10 cm was prepared in the same manner as in Example 1 except that LDPE (Novatech LF542H) was used instead of the thermoformable polyvinyl alcohol resin. Produced. Using this sheet, a repellent test against slugs was conducted.

  The sheet (11) was immersed in water for 2 days, and then pulled up and dried. Next, a repellent test against slugs was performed using the sheet. These results are shown in Table 3.

As a result , the escape prevention rate of Comparative Example 1 after 2 days was 0%, whereas the escape prevention rate of Example 1 was 90 to 100%. Therefore, it has been found that the sheet made of the control composition according to the present invention exhibits sufficient repellent property against slugs.

  Further, even when the sheet is immersed in water for 2 days, the repellent property is maintained in Example 2, and this prevents the repellent effect from being reduced by rainwater or irrigation, and the repellent effect is maintained for a long time. It became clear that On the other hand, in Comparative Example 2, it was found that the repellent effect is greatly reduced by rainwater or irrigation.

  Moreover, the control property with respect to the slug of anhydrous aluminum sulfate was confirmed.

(Example 3)
An anhydrous aluminum sulfate fine powder is used as a solid gastropod control agent, a powdered LDPE resin (manufactured by Nippon Unicar Co., Ltd .: PES-120, MFR = 1.7) as a water-insoluble resin, and a polyethylene oxide resin as a water-soluble resin (Meisei Chemical Industry Co., Ltd .: Alcox R-400) and polyethylene glycol resin (Sanyo Chemical Industries, Ltd .: PEG-6000P) are kneaded in a ratio shown in Table 4 with a twin screw extruder. The control agent-containing sheets (12) to (15) were produced by extrusion from a T-die. The slug repellent test was conducted in the same manner as in Example 1 using each of the obtained control agent-containing sheets. The results are shown in Table 4.

(Comparative Example 3)
Using only the LDPE resin (PES-120) used in Example 3, a sheet (16) having a thickness of 0.5 mm and a width of 10 cm was produced in the same manner as in Example 3, and used in Example 3. A thickness of 0 was obtained in the same manner as in Example 4 using 80% by weight of LDPE resin (PES-120), 10% by weight of polyethylene oxide resin (Alcox R-400) and 10% by weight of polyethylene glycol resin (PEG 6000-P). A sheet (17) having a thickness of 5 mm and a width of 10 cm was produced. Using these sheets, a repellent test against slugs was conducted. The results are shown in Table 5.

Example 4
The sheets (12) to (15) of Example 3 were immersed in water for 2 days, and then pulled up and dried. Next, a repellent test against slugs was performed using the sheet. The results are shown in Table 6.

(Comparative Example 4)
In the production of the sheet (15), a thickness of 0.5 mm was obtained in the same manner as in Example 3 except that powdered LDPE (PES-120) was used instead of the thermoformable polyethylene oxide resin and polyethylene glycol resin. A sheet (18) having a width of 10 cm was produced. Using this sheet, a repellent test against slugs was conducted.

  The sheet (18) was immersed in water for 2 days, and then pulled up and dried. Next, a repellent test against slugs was performed using the sheet. These results are shown in Table 6.

Results The escape prevention rate of Comparative Example 3 after 2 days was 0%, whereas the escape prevention rate of Example 3 was 90 to 100%. Therefore, it has been found that the sheet made of the control composition according to the present invention exhibits sufficient repellent property against slugs.

  Moreover, even if the sheet is immersed in water for 2 days, the repellent property is maintained in Example 4, and the repellent effect is not reduced by rainwater or irrigation, and the repellent effect is maintained for a long time. It became clear. On the other hand, in Comparative Example 4, the repellent effect was greatly reduced by rainwater or irrigation.

  Moreover, the control property with respect to the slug of anhydrous aluminum sulfate was confirmed.

(Example 5)
Aqueous urethane resin (Dainippon Ink & Chemicals, Inc .: Hydran HW-920, solid content 50%), water-soluble polyvinyl acetal resin (Sekisui Chemical Co., Ltd .: ESREC KW-1, solids 20%) ) And copper gluconate (manufactured by Tomita Pharmaceutical Co., Ltd.) were mixed and mixed so that the solid content was in the ratio shown in Table 7 to prepare copper gluconate coating solutions a and b.

  Then, a coating film having a dry thickness of 10 μm is formed on a 100 μm-thick polyethylene terephthalate (hereinafter abbreviated as “PET”) film by using a wire bar, and the coating liquid a or b is formed. Produced. The coated film 6 was attached to each side of the vinyl chloride plate 7 via an adhesive layer 8. That is, as shown to Fig.3 (a) (b), the center part 9 of the vinyl chloride board 7 was made into the part which the coating film 6 does not exist, and the coating film 6 was affixed without the clearance gap so that the circumference | surroundings might be enclosed. A control PVC board 10 was produced. The slug repellent test shown below was conducted using this.

  That is, the control PVC board 10 was placed in a large plastic container (not shown in FIG. 3A). And as shown to Fig.3 (a), while putting the pot 11 which planted the silkworm in the center part 9 of the control vinyl chloride board 10, five Chakoura slugs were released to the exterior of the control vinyl chloride board 10 (FIG. 3 ( not shown in a).). In order to prevent the slugs from drying and dying, the entire container was sprayed with water, and the lid was closed and placed in the dark. One day later, it was determined whether or not a slug has invaded the inside of the control PVC plate 10 or on the pot 11 by observing a silver-like mark formed after the slug has sown.

(Comparative Example 5)
The aqueous urethane resin and aqueous polyvinyl acetal resin used in Example 5 were mixed so that the solid content thereof was a ratio shown in Table 7 to prepare a coating liquid c. Using this coating liquid c, a coating film was produced in the same manner as in Example 5, and this was attached to a PVC plate in the same manner as in Example 5. Using this, the repellent property against slugs was measured in the same manner as in Example 5.

(Example 6)
The aqueous urethane resin and copper gluconate used in Example 5 were mixed so that the solid content was in the ratio shown in Table 7 to prepare a coating liquid d. Using this coating liquid d, a coated film was produced in the same manner as in Example 5, and this was adhered to a polyvinyl chloride plate in the same manner as in Example 5 to produce a controlled polyvinyl chloride plate. Using this, the repellent property against slugs was measured in the same manner as in Example 5.

(Example 7)
The coating film 6 produced in Example 5 was immersed in water for 2 days, and then pulled up and dried. Using the coated film, the repellency against slugs was measured in the same manner as in Example 5.

(Comparative Example 6)
The coated film produced in Example 5 was immersed in water for 2 days, and then pulled up and dried. Using the coated film, the repellency against slugs was measured in the same manner as in Example 5.

Results In Examples 5 to 7, slugs and silvery traces thereof were not observed on the control PVC plate or the bowl in any case.

  On the other hand, in Comparative Examples 5 and 6, slug silver-like marks were seen on the PVC plate and the bowl, and all slugs were hidden under the bowl 11.

  Therefore, it was found that the sheet coated with the control composition according to the present invention exhibits sufficient repellency against slugs. Moreover, even if the sheet was immersed in water for 2 days, the repellency was maintained, and the repellency was not reduced by rainwater or irrigation, and the repellency was maintained for a long time.

  Moreover, the control property with respect to the slug of copper gluconate was confirmed.

Claims (2)

A raw material containing a water-insoluble resin, a water-soluble resin, and a solid water-soluble salt of anhydrous aluminum sulfate , a gastropod control agent, is kneaded and extruded using a hot melt extrusion method using a resin extruder in a dry state. ,
A method for producing a composition for controlling gastropods .   The water-soluble resin is at least one of a polyvinyl alcohol resin, a polyethylene oxide resin, a polyethylene glycol resin, and an aqueous urethane resin;
  The water-insoluble resin is at least olefin resin, styrene resin, vinyl chloride resin, acrylic resin, ethylene / vinyl acetate copolymer resin, ethylene / ethyl acrylate copolymer resin, ionomer resin, polyester resin, polycarbonate resin, polyamide resin, polyurethane resin. One of them,
  The mixing ratio of the water-insoluble resin and the water-soluble resin is 95: 5 to 50:50, and the addition amount of the gastropod control agent is 5 to 50 with respect to the total amount of the water-insoluble resin and the water-soluble resin. % By weight,
  A method for producing a composition for controlling gastropods according to claim 1.

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