JPH08319205A - Plant growth retarding agent and its production - Google Patents

Abstract

PURPOSE: To obtain a plant growth retarding agent for preventing the growth and rankness of weeds by forming a coating film composed of two specific kinds of compounds on a granular material having high whiteness. CONSTITUTION: A granular material having high whiteness is coated with a coating film composed of a composition containing titanium dioxide having photocatalytic function and a zeolite having antibacterial property as a part of the composition. The granular material is preferably a natural stone such as marble or white pegmatite quartz having rounded form with diameter of about 3-15mm. The titanium dioxide having photocatalytic function is preferably ultrafine particles of 0.01-0.1μm diameter. The titanium dioxide has a function to clean the soil by decomposing the agrochemical residue impregnated into the soil and decomposes organic matter to retard the growth of plant. The growth of germinated sprout is retarded by the oxidation reaction promoted by the photocatalyst. Since the titanium dioxide is insoluble in water, the above effects are semi-permanently maintained. Zeolite suppresses the germination of seed and is resistant to the dissolution and flow out with rainwater to semi- permanently keep its antibacterial effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plant growth inhibitor for preventing the growth and overgrowth of weeds by laying it around, for example, a garden, a rail floor of a track, a graveyard, a high-voltage power line tower, and the like. The present invention relates to a manufacturing method.

[0002]

2. Description of the Related Art Generally, water-soluble organic and inorganic plant growth regulators and herbicides are used as chemical agents for suppressing plant growth. This herbicide and other chemical agents
It penetrates from the ground surface into the ground to prevent germination of weeds and to kill weeds that have grown to some extent.

[0003]

However, although the above-mentioned conventional herbicides are water-soluble, they have a great effect of preventing growth on plants. However, since they are water-soluble, they cause various problems as described below. It was a thing. That is, when a large amount of herbicide is infiltrated into the ground, it may be dissolved in groundwater or a river to cause pollution or pollution, which may cause water pollution. Moreover, even if the herbicide is sprayed on the surface of the soil, it will run out by rainwater or penetrate deep into the ground, so it is necessary to spray the herbicide regularly, which is extremely costly. . Moreover, when a large amount of herbicide penetrates into the ground, other effective plants are damaged by growth, which is a cause of destruction of valuable natural resources. Therefore, in most cases, weeds are extremely labor-intensive and time-consuming to remove weeds from various gardens, rail floors of tracks, graveyards, high-voltage power line towers, etc. that require weeding. Met. Especially in a graveyard located far from the residential area or around a high-voltage power tower, it is extremely troublesome and time-consuming to go there, so it is extremely troublesome to go only for weeding. there were.

[0004]

The present invention has been proposed in view of the above-mentioned conventional drawbacks, and titanium dioxide having a photocatalytic reaction function and zeolite having an antibacterial property are provided on the surface of a granular body having high whiteness. The present invention relates to a plant growth inhibitor characterized by forming a film having a composition as a component, and a method for producing the same.

The granular material having a high degree of whiteness used for the growth inhibitor of the present invention is not particularly limited, but for example, natural rounded 3 to 1 such as marble and white silica stone (white sand).
A granular body of about 5 mm can be used. Further, the whiteness of this granular material is not particularly limited, but it is desirable that it is more reflective of ultraviolet rays and the like.

Further, titanium dioxide having a photocatalytic reaction function is not a titanium dioxide of several μm unit which has been conventionally used for pigments and the like but ultrafine particles of 0.01 to 0.1 μm, which is already wide and stable. Has been supplied to the market.
This titanium dioxide is divided into electrons (-) and holes (+) when it receives ultraviolet rays, and the generated holes convert oxygen in the air into active oxygen (OH radicals), and this active oxygen is said to be difficult to decompose. Decomposes many chemicals and organics into hydrogen and carbon dioxide. Therefore, this ultrafine titanium dioxide also has the function of decomposing pesticides (residual pesticides) that have already penetrated into the soil to clean the soil, and decomposes organic substances that serve as nutrients for plants to promote plant growth. Suppress. In addition, the growth of germinated plants is suppressed by the photocatalytic oxidation reaction. Since this titanium dioxide is not water-soluble, it leaks out even when it is exposed to rainwater or the like like the conventional herbicides,
It does not penetrate deep into the ground and maintains its effect semipermanently.

Furthermore, zeolite having antibacterial properties is silver (A) which has an excellent antibacterial activity against general bacteria and mold.
g) Incorporating (supporting) ions or copper (Cu) ions in the skeletal structure of zeolite, which has already been widely supplied to the market. As is well known, in zeolite, aluminum (Al) and silicon (Si) are bonded through oxygen (O) like a mesh, and innumerable fine pores (2 μm to 10,000 μm to 1000 μm) are formed in the crystal. Since it has 1 μm), it has a so-called “molecular sieve” function, and attempts have been made to utilize it for the adsorption and separation performance of substances. As described above, this zeolite having antibacterial properties not only has an antibacterial effect, but also has a deodorizing function of adsorbing an unpleasant odor. Further, synthetic zeolite synthesized by substituting a part or all of the constituent components aluminum and silicon with other elements has already been supplied to the market, but the present invention not only includes natural zeolite but also antibacterial activity against the above synthetic zeolite. You may carry and use the metal ion which has. Next, an example of a method for supporting metal ions having antibacterial activity will be shown. First, silver nitrate (AgNO ₃ ) is dissolved in a large amount of water, natural zeolite is added, and the reaction is carried out for 6 hours or more with slow stirring. Then, the product is thoroughly washed with water to remove silver (Ag) ions on the surface of the zeolite and dried to obtain a product (in this case, zeolite carrying silver ions). Although the antibacterial mechanism of the above zeolite carrying metal ions having antibacterial activity has not been completely elucidated, enzyme inhibition of basic metabolic systems such as respiratory system and electron transfer system of microbial cells, or inhibition of mass transfer of cell membranes. Is considered to exhibit antibacterial properties,
Exhibits a wide range of antibacterial effects against mold and the like. Plant seeds
Germination is suppressed. Moreover, the carried metal ions dissolve (elute) even when exposed to rainwater, like the conventional herbicides.
The antibacterial effect acts semipermanently.
Furthermore, this zeolite is highly non-toxic and, since it is an inorganic substance, it has excellent heat resistance.

The plant growth inhibitor of the present invention containing each of the above components as a basic component can be produced as follows. First, a slurry is prepared by uniformly mixing the titanium dioxide having the photocatalytic reaction function and the zeolite having antibacterial properties with the resin emulsion. Since the diluted water is water, the resin emulsion has no fear of fire (compared with many flammable organic solvents), has low toxicity, does not have an unpleasant odor of the organic solvent, and dries quickly. The coating film is characterized by having high alkali resistance and high water vapor transmission rate. Specifically, for example, a vinyl acetate-based (ethylene-vinyl acetate copolymer-based, or vinyl chloride-vinyl acetate copolymer-based copolymerized system is preferable. ) An emulsion, a styrene-butadiene type emulsion, an acrylic type emulsion or the like can be appropriately selected and used. Generally, vinyl acetate (copolymerization) type emulsions are excellent in water resistance, water washability, etc., styrene-butadiene type emulsions are excellent in alkali resistance and water resistance, and have low penetrability. Although it has a feature of being excellent in abrasion resistance, it may be appropriately selected according to the application. Next, the above-mentioned mixed slurry is sprinkled on the surface of the granular material having a high degree of whiteness to be attached thereto. And 7
When dried at a temperature of 0 ° C. or lower, the resin component in the resin emulsion serves as a binder (binding material), and a film having titanium dioxide having a photocatalytic reaction function and zeolite having antibacterial properties as a part of the composition has whiteness. Formed on the surface of tall granules. When dried at a temperature of 70 ° C or higher, the resin in the resin emulsion softens and melts to cover the surface of titanium dioxide having a photocatalytic reaction function or the surface of zeolite having antibacterial properties, and the effects such as antibacterial properties are sufficiently exhibited. Disappear.

The plant growth inhibitor of the present invention obtained as described above may be appropriately laid in a place where weeds are not desired to grow, such as a garden. Incidentally, prior to the laying of the growth inhibitor of the present invention, for weeds and the like that have already grown, it is possible to absorb nutrients not only from the ground but also from the leaf surface exposed on the ground, It is preferable to remove it.

In the growth inhibitor of the present invention, which is appropriately laid on the surface of soil, titanium dioxide having a photocatalytic reaction function and a zeolite having an antibacterial property adhered to the surface of a granular body having a high degree of whiteness achieve the above-mentioned effects, respectively. . That is, the granular material having a high degree of whiteness reflects the ultraviolet light without absorbing it, and supplies the ultraviolet light to the titanium dioxide having a photocatalytic reaction function, which is held on the surface thereof. Titanium dioxide, which has a photocatalytic reaction function, acts as a photocatalytic reaction function with ultraviolet rays, and decomposes organic substances that serve as nutrients for plants to suppress the growth of plants. In addition, the growth of the germinated plants is suppressed. Zeolites with antibacterial properties exert a wide range of antibacterial functions against molds and the like. In addition, germination of plant seeds is suppressed. Therefore, the synergistic effect suppresses plant growth. Further, as described above, titanium dioxide having a photocatalytic reaction function also functions to decompose pesticide residues in soil and clean the soil, and zeolite having antibacterial properties has a deodorizing function of adsorbing an unpleasant odor. Since it also fulfills the environment, it not only does not adversely affect the surrounding environment, but also makes a great contribution to environmental conservation. Furthermore, since titanium dioxide having a photocatalytic reaction function and zeolite having an antibacterial property are both inorganic substances, it is possible to maintain the effect semipermanently without the need to periodically lay down a new growth inhibitor, for example. , Its practical value is extremely high. In addition, even if a puddle is formed on the surface on which the growth inhibitor is laid due to heavy rain, for example, titanium dioxide having a photocatalytic reaction function and metal ions having an antibacterial activity can be eluted in water. Since the same effect is exerted, the water pool can be kept clean.

Therefore, for example, when the growth inhibitor of the present invention is laid around a graveyard or a high-voltage power line tower that is located far from the residential area without frequent access, the growth of plants such as weeds is suppressed. It can be kept clean and semi-permanent, so there is no need to go there regularly for weeding purposes only. In particular, when weeds flourish in the summer, pests such as mosquitoes may easily breed and damage neighboring residents, but the growth inhibitor of the present invention does not cause such a problem. Further, even if a water puddle is formed due to heavy rain or the like, even the puddle can be kept clean, so that pests can be prevented from propagating from the puddle and damage to the neighborhood is not sufficiently caused.

[0012]

EXAMPLES Examples of the present invention will be shown below.

<Production of Growth Inhibitor> First, 50 g of all-acrylic type one-liquid cross-linking emulsion and titanium dioxide (trade name "Titanium" having a photocatalytic reaction function.
Dioxide P25 "made by Nippon Aerosil Co., Ltd.) 20 g and antibacterial zeolite (trade name" Zeomi
c AC ”made by Sinanen Zeomic Co., Ltd.) 10 g,
50 g of water was mixed to prepare a uniform mixed slurry.
Next, 1.5 kg (1 liter) of 7-10 mm marble granules were sprinkled with the mixed slurry and dried at 65 ° C. to obtain a granular growth inhibitor.

<Confirmation of Plant Growth Inhibitory Effect> (Test Method) About 3 cm of earth and sand was put in a tray, and 600 seeds of weeds were put therein to make a test culture soil. On the surface of the test culture soil, the granular growth inhibitor obtained as described above is laid so as to have a thickness of 3 to 5 cm,
Appropriate water was supplied to observe germination and growth at 25 ° C. For comparison, a comparative example was prepared in the same manner except that a growth inhibitor was not laid. (Test Results) In the case where the growth inhibitor of the present invention described above was laid, 10% of the whole germinated after 3 days, but all died after 10 days. On the other hand, in the case where the growth inhibitor was not laid, most of them germinated after 3 days and continued to grow after 10 days.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments and can be implemented in any manner as long as the configuration described in the claims is not changed. .

[0016]

Industrial Applicability As described above, the plant growth inhibitor of the present invention comprises titanium dioxide having a photocatalytic reaction function and zeolite having an antibacterial property on the surface of a granular body having high whiteness. Since the granular material having a high degree of whiteness is reflected without absorbing ultraviolet rays, the titanium dioxide having a photocatalytic reaction function is supplied with ultraviolet rays and is held on the surface thereof. Titanium dioxide, which has a photocatalytic reaction function, has a photocatalytic reaction function by ultraviolet rays, which inhibits the growth of aerobic fungi and plants, and the germination of sprouted plants is suppressed by the photocatalytic oxidation reaction.
In addition, zeolite having antibacterial properties exhibits a wide range of antibacterial functions, and germination of plant seeds is suppressed. Therefore, the synergistic effect suppresses plant growth.

Further, titanium dioxide having a photocatalytic reaction function also has a function of decomposing pesticide residues in soil to clean the soil, and zeolite having antibacterial properties also has a deodorizing function of adsorbing an unpleasant odor. As a result, it will not only adversely affect the surrounding environment, but will also make a great contribution to environmental conservation.

Further, since titanium dioxide having a photocatalytic reaction function and zeolite having an antibacterial property are inorganic substances,
For example, it is not necessary to periodically lay a new growth inhibitor for replacement and the effect can be maintained semipermanently, and its practical value is extremely high.

In addition, even if a water pool may be formed on the surface on which the growth inhibitor is laid due to heavy rain, for example, titanium dioxide having a photocatalytic reaction function and metal ions having an antibacterial activity are eluted in water. Without doing
A similar effect is exerted so that the puddle can be kept clean. Further, unlike the above-mentioned conventional herbicides, it does not elute into groundwater or rivers and cause pollution or pollution.

Therefore, when the growth inhibitor of the present invention is laid around a graveyard or a high-voltage power line tower which is located far from the residential area without frequent access, the growth of plants such as weeds is suppressed. It can be maintained in a stable state semipermanently. Also, there is no need to go there regularly just for weeding. In particular, if weeds are left for a long time in the summer, pests such as mosquitoes will easily grow,
Although the local residents may be damaged, such problems do not occur when the growth inhibitor of the present invention is used. Further, even if a water puddle is formed due to heavy rain or the like, even the water puddle can be kept clean, so that the propagation of harmful insects and the generation of unpleasant odor can be suppressed.

Claims (2)

[Claims] 1. A plant growth control characterized in that a film comprising titanium dioxide having a photocatalytic reaction function and zeolite having an antibacterial property as a part of the composition is formed on the surface of a granular body having a high degree of whiteness. Agent. 2. A slurry containing titanium dioxide having a photocatalytic reaction function, zeolite having an antibacterial property, and a resin emulsion is adhered to the surface of a granular material having a high whiteness, and the slurry is heated at a temperature of 70 ° C. or lower. A method for producing a plant growth inhibitor, characterized in that it is dried to form a film having titanium dioxide having a photocatalytic reaction function and zeolite having antibacterial properties as a part of its composition.