JP6375262B2 - Underwater harmful animal extermination tool - Google Patents

Description

The present invention relates to an extermination tool for exterminating harmful animals that live in water.

  Conventionally, damage caused by scallop apple mussels that inhabit paddy fields and eat rice seedlings, and river snails that occur frequently at various water facilities and cause water damage and deterioration of water quality has been a problem. In addition, there is a risk that the inflatables spread through mosquitoes by the occurrence of mosquitoes by the emergence of bow flares that inhabit water storage tanks and park ponds.

  Conventionally, as disclosed in Patent Document 1, as a method for controlling scallop apple mussels, there are a method for applying agricultural chemicals such as cartap granule and lime nitrogen, and a method for applying a pesticide containing resin acid as an active ingredient. there were.

  In addition, as disclosed in Patent Document 2, there has been a water quality improvement device in which a copper and zinc alloy or a metal fiber made of copper is filled in a water filled container. It is described that when this water quality improvement device is installed in water such as a tank, the effect of suppressing the generation of algae and preventing the occurrence of bow flares by the redox action of copper ions and zinc ions eluted from metal fibers can be obtained. Has been.

Japanese Patent Laid-Open No. 2003-238312 JP 2012-239938 A

  However, when extinguishing scallops, if pesticides are applied as described in Patent Document 1, harmless animals such as medaka and crucian can also die. Furthermore, since the agricultural chemicals are absorbed by paddy rice, the amount of the agricultural chemicals to be applied is limited in order to ensure the safety of human food, so that it is difficult to expect a reliable extermination effect.

  The pesticide formulated with the resin acid of the invention of Patent Document 1 may be toxic even if it is a component derived from a natural product, and since the resin acid is hydrophobic, it is water-soluble by a solvent, a surfactant, an emulsifier, etc. Since there is a toxicity of additives such as solvents, there is a possibility of harming humans and useful organisms.

  Moreover, although the water quality improvement apparatus of patent document 2 is effective, such as not making a bow flat emerge, the effect is not enough and the extermination tool which can kill a bow flat more reliably was calculated | required.

The present invention has been made in view of the above background art, it is possible to effectively combating certain pests, to provide disinfection device underwater pests without harm to other animals and humans For the purpose.

The present invention has a metal fiber including a copper-zinc alloy fiber made of a copper-zinc alloy, and the metal fiber is installed in water inhabited by a snail or a bivalve that is an aquatic harmful animal to be controlled. An underwater harmful animal extermination tool that exudes copper snails and zinc ions from the copper zinc fiber, and exterminates the snails or bivalves by the action of the dissolved copper ions and zinc ions.

  The copper-zinc alloy fiber has a mass ratio of copper and zinc of 80:20 to 60:40. The copper zinc alloy fiber has a cross-sectional diameter of 60 to 200 μm. Further, the copper-zinc alloy fiber aggregate is accommodated in a bag-like net.

In particular, the present invention is composed of a copper-zinc alloy fiber made of a copper-zinc alloy and a copper fiber made of copper, and the copper-zinc alloy fiber is rounded into a ball shape. A metal fiber provided with a layer of the copper fiber so as to cover the surface, the metal fiber is installed in water inhabited by an aquatic harmful animal to be controlled, and from the copper zinc fiber, copper ions and zinc An aquatic harmful animal extermination tool that extinguishes the aquatic harmful animal by the action of the dissolved copper ions and the zinc ions. The underwater harmful animal is a bowfra.

According to water pest extermination device of the present invention, snails including apple snail, bivalves including Limnoperna lacustris, it is possible to exterminate mosquito larvae like easily and reliably is a mosquito larva, useful such as other crops or farming fish It does not harm organisms. Copper and zinc are essential nutrient elements for the human body, and the amount of copper ions and zinc ions that dissolve into the water from metal fibers is limited by differences in the ionization tendency of copper and zinc, oxidation of the copper surface, etc. There is no risk of harm to people.

It is a figure which shows the state which installed the extermination tool of the underwater harmful animal of 1st embodiment of this invention in the water of a paddy field. It is the figure (a) which shows the state which installed the extermination tool of the underwater harmful animal of 2nd embodiment of this invention in the water of a water storage tank, and the figure (b) which shows the internal structure of a metal fiber.

Hereinafter, the first embodiment of the disinfection device of the water pest of the present invention will be described with reference to FIG. The extermination tool 10 according to this embodiment is for exterminating snails such as scallops that live in paddy fields.

  The extermination tool 10 has a fiber assembly of copper-zinc alloy fibers 12 which are metal fibers in which an alloy of copper and zinc is formed into a fiber. The copper-zinc alloy fiber 12 has a mass blending ratio of copper and zinc of about 80:20 to 60:40, preferably 70:30 to 65:35. If the proportion of zinc is less than the above, there will be harm to useful organisms due to an increase in copper ions, and if the proportion of zinc is more than the above, the alloy will be too hard to be formed into a fiber shape. The diameter of the copper zinc alloy fiber 12 is 60 to 200 μm, preferably 80 to 100 μm. By setting the diameter to this level, the surface area per unit volume is increased, the contact area with water is increased when installed in water, and copper ions and zinc ions are easily eluted. Further, when the user or the like handles the fiber, the fiber is hardly pierced and the hand is hardly damaged. The amount of the copper-zinc alloy fiber 12 can be set as appropriate, but the effect has been confirmed at about 250 to 350 g for 1000 liters of water. The copper-zinc alloy fiber 12 is housed in a synthetic resin or metal bag-like net body 14 and becomes the extermination tool 10.

  As shown in FIG. 1, the disinfecting device 10 may be installed by immersing it in the water on the water supply side of the paddy field water 16, for example, no special equipment such as an electrolyzer for generating ions is required. It is. If left as it is, copper ions and zinc ions are gradually dissolved from the copper-zinc alloy fiber 12, and within a few days, the ion concentration is a desired value, for example, the copper ion concentration is about 0.001 ppm, the zinc ion concentration Is about 0.01 ppm. Copper ions and zinc ions are taken into the body of the snail and cooperate with each other, causing the snail to lose its ability to take up proteins involved in metabolism. In about two weeks after installation, harmful snails can be almost completely killed. In the experiment conducted by the inventor, when only zinc ions are dissolved in the water 16, the effect of killing scallops is weak, and on the contrary, when only copper ions are dissolved in the water 16, it is constant. It has been confirmed that exceeding the ion concentration of can cause adverse effects on other harmless animals.

  As described above, the snail extermination tool 10 can easily and surely kill harmful snails such as scallops that live in paddy fields simply by immersing them in the water 16 of paddy fields and leaving them alone. In particular, since the copper-zinc blending ratio and fiber diameter of the copper-zinc alloy fiber 12 are set to appropriate values, the concentrations of copper ions and zinc ions in the water 16 automatically become suitable values, which are harmful. Can be killed effectively. Further, the zinc of the copper-zinc alloy fiber 12 of the snail extermination tool 10 maintains a constant ionization depending on the amount and flow of the target water, but remains as a part of the surface zinc is removed. The ratio of the copper portion increases, the copper surface is covered with an oxide film, and ion elution into water gradually decreases. Since copper is less ionized than zinc, it becomes difficult to continue melting when confined in the film. As a result, copper continues to melt and the copper ion concentration increases cumulatively, and does not adversely affect aquatic organisms in the environment.

  In addition, the extermination tool 10 is also suitable for extermination of harmful bivalves, such as kawahibari. Since the river snail adheres to the wall of a water channel or the like through which water flows, the extermination tool 10 is preferably installed in the vicinity of the wall surface of the water channel or the like. In this case, the amount of the copper-zinc alloy fiber 12 may be about 5 to 15 g with respect to a water flow rate of 1 liter / min, and can easily and reliably kill harmful river snails that inhabit the water channel.

  Next, a second embodiment of the underwater harmful animal extermination tool of the present invention will be described with reference to FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted. The extermination tool 18 of this embodiment kills the bow fla which lives in a water storage tank etc., and it prevents that it emerges and mosquitoes are generated.

  The removal tool 18 has a metal fiber 22 composed of the copper zinc alloy fiber 12 and a copper fiber 20 made of copper. The copper fiber 20 has a fiber diameter of 60 to 200 μm, preferably 80 to 100 μm, and in the same manner as in the above embodiment, when it is installed in water, the contact area with water becomes moderately large, and copper ions It is easy to melt out and it is hard to hurt the hand when the user handles it.

  As shown in FIG. 2 (b), the metal fiber 22 is a copper-zinc alloy fiber 12 which is rounded with a gap in a ball shape, and a layer of the copper fiber 20 is provided so as to cover the ball-shaped surface, It is formed in a ball shape as a whole. The metal fiber 22 is accommodated in a synthetic resin or metal bag-like net 14 and becomes the extermination tool 18.

  As shown in FIG. 2 (a), the disinfecting device 18 may be installed by simply immersing it in the water 24 of the water storage tank. If left as it is, copper ions and zinc ions gradually melt from the copper-zinc alloy fiber 12, copper ions gradually melt from the copper fiber 20, and within a few days, the concentrations of copper ions and zinc ions become appropriate values. (A value that effectively kills the boufra and does not adversely affect other harmless animals and plants). The bowfra can be almost completely killed in about two weeks after installation.

  Since the removal tool 18 is provided with a layer of copper fiber 20 so as to cover the copper-zinc alloy fiber 12 rolled into a ball shape, only the copper-zinc alloy fiber is used as in the water quality improvement device disclosed in Patent Document 2. In the case of the same volume, the concentration of copper ions can be made moderately high, and the effect of killing the bowfra can be remarkably improved.

  Note that the underwater harmful animal extermination tool of the present invention is not limited to the above embodiment. For example, although the said extermination tools 10 and 18 are the structures accommodated in the bag-like net | network body 14 and installed in water, it may replace with the net | network body 14 and may accommodate in water-permeable containers, such as a basket. . Further, if necessary, the structure may be such that a net body or the like is omitted, and a single metal fiber, powder of copper or copper-zinc alloy, a granular body, or an acicular body is disposed in water.

  In addition, the aquatic harmful animal extermination tool of the present invention has been confirmed by experiments to be particularly suitable for extermination of scallop apple mussels, cormorants (and boufra), A sufficient effect can be obtained by the same action. Furthermore, it is also an effective usage method to use a harmful animal extermination function of zinc ions and copper ions and to spray water containing these ions to an area where harmful animals live. The target harmful animals can be applied to aquatic animals other than shellfish and invertebrates on the ground.

DESCRIPTION OF SYMBOLS 10 Excavator for snails 12 Copper-zinc alloy fiber 14 Net body 16, 24 Water 18 Exclusion tool 20 for bow flares Copper fiber 22 Metal fiber

Claims (1)

It is composed of a copper-zinc alloy fiber made of copper-zinc alloy and a copper fiber made of copper, and the copper-zinc alloy fiber is rounded into a ball shape so as to cover this ball-shaped surface Having a metal fiber provided with a layer of said copper fiber;
The metal fiber is installed in water inhabited by an aquatic harmful animal to be controlled, copper ions and zinc ions are dissolved from the copper zinc fiber, copper ions are dissolved from the copper fiber, and the copper ions are dissolved. And an aquatic harmful animal extermination tool characterized in that the zinc ions act to extinguish the aquatic harmful animal.

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