JP2002080302A - Agricultural/horticultural preparation of aqueous suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural/horticultural preparation of aqueous suspension, capable of effectively controlling nematodes, algae, liverworts, and plant pathogenic microbes which injure plants in agricultural/horticultural fields, without generating chemical injuries to the plants so as to be safe for the plants, and excellent in preservability. SOLUTION: This agricultural/horticultural preparation of the aqueous suspension contains a silver-supporting zeolite as an active ingredient wherein the silver-supporting zeolite is prepared by supporting silver ion in a ratio of 20-40% on the zeolite.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an aqueous suspension formulation for agricultural and horticultural use, and more particularly, to a root which damages plants in the agricultural and horticultural field, using a silver-supported zeolite obtained by supporting silver ions on zeolite as an active ingredient. The present invention relates to an aqueous suspension formulation for agricultural and horticultural use that is effective in controlling algae generated on greens such as parasitic nematodes and golf courses, and plant bacterial diseases.

[0002]

2. Description of the Related Art Soil nematodes parasitic on roots of agricultural crops are known as causes of continuous cropping failure in field crops. These soil nematodes are small and difficult to detect with the naked eye, and their habitat is in the soil, the area that harms the crops is underground, and the damage is Because it is chronic, it is easy to find the damage late, and its distribution is widespread, resistant to bad environment, can survive for a long time, and its density increases depending on the host plant It is very difficult to control this.

As a method for controlling this soil nematode, in consideration of the above-mentioned characteristics of the soil nematode, an cultivation method such as rotation is generally effective. Large root-knot nematodes (genus Meloidogyne) and root-knot nematodes (genus Pratylenchus) parasitize a great variety of plants, making it difficult to establish an effective rotation system. In addition, as a cultivation method, methods using flooding and solar heat are also effective, but these methods are special methods at this stage and require a large amount of cost, so they are used in some facilities. It's just Therefore, as a method for controlling the above-mentioned soil nematodes, at present, methods using chemicals are mainly used.

However, the soil fumigant, which is the main component of the chemical, has a strong chemical effect and cannot be used therapeutically except for a part. It has drawbacks such as the need to provide a degassing period. Therefore, the development of a drug that is effective both prophylactically and therapeutically and that is safe has been desired.

[0005] In the bent green of a golf course, the growth of bentgrass is extremely active from spring to early summer, and a large amount of water is required in the summer to prevent summer dying. A volume of irrigation is usually used. However, this irrigation also promotes the growth of moss and algae in the soil, and the green surface is covered with thick flora, which may hinder the growth of bentgrass. In particular, recently, as the penetration rate of bent greens has increased, the problem of algae generation has become more serious, and golf courses are being pressed for this.

[0006] However, some herbicides, fungicides, amino acid metal soaps, and the like have been proposed as corresponding alga controlling agents at present, but none of them have an excellent controlling effect. Control agents also have the problem of chemical injury to turf.

Japanese Patent Application Laid-Open Nos. 04-36208 and 04-46106 describe the antibacterial properties of silver as a fungicide in the field of agriculture and horticulture, but do not show a sufficient bactericidal effect. , Its scope is limited,
Further, there is no mention of a control effect on soil nematodes that damage crops and algae and moss generated on bent greens of golf courses.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and effectively controls nematodes, algae, moss, and phytopathogenic fungi that attack plants in the field of agriculture and horticulture. It is an object of the present invention to provide an agricultural and horticultural underwater suspension formulation which is safe and has excellent preservability without causing phytotoxicity.

[0009]

Means for Solving the Problems In order to achieve the above object, the present inventors focused on the high antibacterial effect and safety of silver, which has been conventionally known, and as a result of diligent studies, they have found that zeolite can be used. It has been found that a suspension preparation obtained by dispersing a silver-supported zeolite carrying silver ions in water exhibits extremely high soil nematode control effect and algal control effect. In the present invention, the release of silver ions contributing to the manifestation of the above-mentioned effect is promptly performed, and in order to make the effect remarkable, the amount of silver supported on the silver-supported zeolite as an active ingredient is the maximum ion of the zeolite. Until near the exchange capacity, by increasing the amount of silver supported on the silver-supported zeolite, in order to further exhibit the above-mentioned effect, the silver-supported zeolite is refined, suspended in water to form a suspension in water. It was completed as a result.

[0010] That is, the present invention for achieving the above object is an aqueous suspension formulation for agricultural and horticultural use containing a silver-supported zeolite obtained by supporting silver ions on a zeolite at a ratio of 20 to 40%, In a preferred embodiment of the aqueous suspension formulation for agriculture and horticulture, the silver-supported zeolite is particles having an average particle size of 0.8 to 1.5 μm, the silver-supported zeolite is 10 to 40% by weight, and the xanthan gum is 0% by weight. 0.1 to 1% by weight and 59 to 89.9% of water, and the agricultural and horticultural water suspension formulation is for nematicides or algicides.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The aqueous suspension formulation for agricultural and horticultural use according to the present invention comprises a zeolite carrying silver as an active ingredient. This silver-supported zeolite is formed by supporting silver ions on zeolite.

The zeolite may be either synthetic zeolite or natural zeolite, and is not particularly limited. Examples of the synthetic zeolites include A-type zeolites, P-type zeolites, X-type zeolites, and Y-type zeolites, and these include sodium silicate solution, sodium aluminate, and sodium hydroxide, and SiO ₂ / Al ₂ O ₃ , Na ₂ O ₃ / SiO ₂ , H ₂ O
/ Na ₂ O at a predetermined molar ratio and hydrothermal synthesis. Examples of the natural zeolite include mordenite, analsite, clinoptilite, and sodalite.

The method of preparing the silver-supported zeolite by supporting silver ions on the zeolite is not particularly limited as long as the object of the present invention can be achieved, but an ion exchange method is usually employed. The zeolite contains ion-exchangeable metal ions and the like, and exchange of the metal ions and the silver ions easily occurs by bringing a silver ion solution into contact with the zeolite, and silver ions are supported on the zeolite. , A silver-loaded zeolite is prepared. The silver salt used in the ion exchange method is not particularly limited as long as the ion exchange is possible, and examples thereof include silver nitrate. A specific operation method of the ion exchange method can be performed according to a known operation of the ion exchange method.

The amount of silver ions carried on the zeolite (hereinafter referred to as “silver carried amount”) is 20 to 40% by weight, more preferably 25 to 35% by weight, based on the zeolite. When the amount of silver supported is within the above range, the amount of silver ions required for the soil nematode controlling effect and the algal controlling effect to be exhibited when the aqueous suspension formulation for agricultural and horticultural use is used is quickly changed to the silver amount. By releasing the zeolite from the ion-supporting zeolite, the above-described effects are remarkably exhibited, and the object of the present invention can be achieved.

When the silver ion-supported zeolite is prepared by an ion exchange method, the amount of silver supported is limited depending on the type of the zeolite. Therefore, the amount of silver supported can be adjusted within the above range. Is selected. Further, in the case of using this method, the amount of silver carried can be adjusted within the above range by appropriately determining the amount of silver ions to be brought into contact with the zeolite, the contact conditions, and the like.

The average particle size of the silver ion-supporting zeolite is not particularly limited as long as the object of the present invention can be achieved, but is preferably 0.5 to 4.0 μm, and more preferably 0.8 to 1 μm. Particularly preferably, it is 0.5 μm. When the average particle size is within the above range, the effect can be stably exhibited, the silver ion-supported zeolite can be easily dispersed in water by being suspended in water, and handling is easy. There is an advantage that there is.

The zeolite supporting silver ions having an average particle diameter in the above range may be prepared by a method in which silver ions are supported on the zeolite particles having an average particle diameter in the above range by an ion exchange method or the like. After supporting silver ions on the zeolite particles having an average particle size larger than the average particle size in the range by an ion exchange method or the like,
A method of pulverizing the particles into particles having an average particle diameter within the above range by a ball mill, a hammer mill, a jet-type pulverizer, or the like may be used. Further, this pulverization treatment may be a dry method or a wet method.

The silver ion-carrying zeolite may carry metal ions other than silver ions as long as the achievement of the object of the present invention is not hindered. Examples of the metal ion other than the silver ion include a copper ion and a zinc ion. In this case, the types of metal ions carried other than the silver ions may be one type or two or more types. When the silver ion-carrying zeolite also supports metal ions other than silver ions, when preparing it by an ion exchange method, a solution containing both silver ions and metal ions other than silver ions is brought into contact with the zeolite. These ions may be exchanged simultaneously, or a solution containing silver ions and a solution containing metal ions other than silver ions may be separately contacted with the zeolite to exchange these ions sequentially. You may.

The aqueous suspension formulation for agriculture and horticulture according to the present invention is a formulation prepared by suspending the silver-carrying zeolite in water. The method of suspending the silver-supported zeolite in water is not particularly limited as long as a preparation in which the silver-supported zeolite is uniformly suspended in water can be obtained.For example, the silver-supported zeolite is added to water. A method in which the mixture is stirred by various mixers until the silver-supported zeolite is uniformly dispersed in water can be used. Further, when pulverizing silver ion-supported zeolite particles in water to have a predetermined average particle size as described above, simultaneously with the pulverization,
The zeolite carrying silver ions can also be suspended in water.

The content of the silver-supported zeolite in the agricultural and horticultural underwater suspension according to the present invention is 10 to 40% by weight.
Is more preferable, and particularly preferably 20 to 40% by weight.

The aqueous suspension formulation for agricultural and horticultural use according to the present invention preferably contains a thickener in order to stabilize the dispersion state of the silver-carrying zeolite. Examples of the thickener include xanthan gum, guar gum, C
MC, starch, dextrin, carrageenan and the like can be mentioned. Among these, xanthan gum is most preferred in that the effect of improving the long-term stability of the aqueous suspension formulation for agriculture and horticulture is great. As a method for adding the thickener, a method in which the silver-supported zeolite is suspended in water to obtain a suspension, and then the thickener is added to the suspension; and And the silver-supported zeolite are simultaneously added to water, and the method of suspending the silver-supported zeolite in water and simultaneously dissolving the thickener in water may be mentioned. From the viewpoint of improvement, a method in which the thickener and the silver-supported zeolite are simultaneously added to water is preferable.

In the case where the agricultural and horticultural water suspension formulation according to the present invention contains a thickener, the mixing ratio of the silver-supported zeolite, the thickener and water in the agricultural and horticultural water suspension formulation is as follows: The mixing ratio of the silver-supported zeolite is 10 to 40.
% By weight, the mixing ratio of xanthan gum is 0.1 to 1% by weight, and the mixing ratio of water is 59 to 89.9%, whereby the dispersion state of the silver-supported zeolite can be stabilized for a long time, Further, it is preferable in that it is convenient in handling and use.

Further, the aqueous suspension formulation for agriculture and horticulture according to the present invention can be used as long as the object of the present invention is not hindered.
An auxiliary agent such as a surfactant may be contained. Examples of the surfactant include an alkyl sulfate salt,
Anionic surfactants such as alkyl (aryl) sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkyl aryl ether phosphates, and naphthalenesulfonic acid formalin condensates; and polyoxyethylene alkyl ethers and polyoxyethylene Examples include nonionic surfactants such as polyoxypropylene block copolymers, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters.

The aqueous suspension formulation for agricultural and horticultural use according to the present invention not only exhibits excellent effects as a soil nematode control agent, algae control agent and moss control agent, but also a pinewood nematode control agent and a plant disease. It can also be used as a controlling agent. Soil nematodes that can be controlled include, for example, root-knot nematodes (genus Melodgyne), cyst nematodes (genus Heterodeda, G
lobodera), Negusare nematode (Pratylenchus)
Genus), rice singing nematode (Aphelenchoides bessey)
i) and the like. Algae that can be controlled include:
For example, algae (Dictyonema sp.) And the like can be mentioned. Moss that can be controlled includes, for example, Gingoke (Bryu
argenteum) and the like. Examples of plant diseases that can be controlled include, for example, rice leaf blight (Xanthomonas b.
lumae), rice blight seedling (Gibberella pojikoroi), rice seedling blight (Pseudomonas plantarli), eggplant wilt (Ralstonia solanacearum), and rice seed blight (Pseu)
domonas glumae).

The aqueous suspension formulation for agriculture and horticulture according to the present invention may be used alone, but may also be used as a mixture with other plant control agents and vitalizers. In particular, when the aqueous suspension formulation for agriculture and horticulture according to the present invention is used in bent green as an algae control agent, a small amount of turf grass activating agent urea, wood vinegar, chitin / chitosan, etc. are mixed. It is more effective when used. In addition, these vitalizers can be contained in the agricultural and horticultural water-based suspension formulation according to the present invention.

The aqueous suspension formulation for agricultural and horticultural use according to the present invention is used after adjusting the concentration so that a predetermined silver concentration is obtained at the time of use. The preferred silver concentration at the time of using the agricultural and horticultural water-based suspension formulation according to the present invention is 50 to 50
100 ppm, 500-1000 pp for algae
m, 250-500 ppm for moss and 500-1000 ppm for plant pathogenic bacteria.

[0027]

EXAMPLES The present invention will be described below with reference to examples and test examples, but these do not limit the present invention.

(Formulation Example 1) 100 parts by weight of A-type zeolite (hereinafter, parts by weight are simply referred to as "parts") and 800 parts of distilled water
And the mixture was stirred to prepare a suspension. 0.5N
60 parts of a nitric acid solution were added to adjust the pH to 5-7. While stirring the pH-adjusted suspension, 44 parts of silver nitrate was added thereto, and an ion exchange reaction was performed for 2 hours. After the completion of the ion exchange reaction, the ion-exchanged zeolite was separated by filtration and washed with water. This water washing was repeated until no silver ions were detected from the washing solution. 1 of this washed zeolite
By drying at 10 ° C., a silver-supported zeolite (Invention sample 1) was obtained.

(Formulation Example 2) X-type zeolite (faujasite)
(Type) 100 parts by weight and 800 parts of distilled water were mixed and stirred to prepare a suspension. To this, 60 parts of a 0.5N nitric acid solution was added to adjust the pH to 5 to 7. While stirring the pH-adjusted suspension, 44 parts of silver nitrate was added thereto, and an ion exchange reaction was performed for 2 hours. After the completion of the ion exchange reaction, the ion-exchanged zeolite was separated by filtration and washed with water. This water washing was repeated until no silver ions were detected from the washing liquid. The washed zeolite was dried at 110 ° C. to obtain a silver-supported zeolite (sample 2 of the present invention).

(Formulation Example 3) X-type zeolite (faujasite)
(Type) 100 parts by weight and 800 parts of distilled water were mixed and stirred to prepare a suspension. To this, 60 parts of a 0.5N nitric acid solution was added to adjust the pH to 5 to 7. While stirring the pH-adjusted suspension, 35 parts of silver nitrate was added thereto, and an ion exchange reaction was performed for 2 hours. After the completion of the ion exchange reaction, the ion-exchanged zeolite was separated by filtration and washed with water. This water washing was repeated until no silver ions were detected from the washing liquid. By drying the washed zeolite at 110 ° C., a silver-supported zeolite (Comparative Sample 1) was obtained.

(Example 1) 20.0 parts of the sample 1 of the present invention
, 0.5 parts of xanthan gum (trade name "Roadpol 23", manufactured by Rhone Poulin Co.) and 79.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were further added to the mixture. Was put. A paint shaker was set in the mayonnaise bottle, and the sample 1 of the present invention was pulverized for 2 hours using the paint shaker, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

Example 2 20.0 parts of sample 2 of the present invention
, 0.5 parts of xanthan gum (trade name "Roadpol 23", manufactured by Rhone Poulin Co.) and 79.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were further added to the mixture. Was put. A paint shaker was set in the mayonnaise bottle, and the sample 1 of the present invention was pulverized for 2 hours using the paint shaker, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

(Example 3) 20.0 parts of the sample 1 of the present invention
And 0.5 parts of xanthan gum (trade name "Roadpol 23", manufactured by Rhone Poulin), 1.0 part of chitin chitosan (trade name "Green Messe 21," manufactured by Nagasaki Shoji Co., Ltd.), and 78 0.5 parts of distilled water was weighed into a 500 ml mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in the mayonnaise bottle, and the sample 1 of the present invention was pulverized for 2 hours using the paint shaker, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

Example 4 20.0 parts of sample 2 of the present invention
And 0.5 parts of xanthan gum (trade name "Roadpol 23", manufactured by Rhone Poulin), 1.0 part of chitin chitosan (trade name "Green Messe 21," manufactured by Nagasaki Shoji Co., Ltd.), and 78 0.5 parts of distilled water was weighed into a 500 ml mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in the mayonnaise bottle, and the sample 1 of the present invention was pulverized for 2 hours using the paint shaker, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

(Comparative Example 1) 25.0 parts of Comparative Sample 1
0.5 parts of xanthan gum (trade name "Road Poll 2"
3 ", manufactured by Rhone Poulin Co., Ltd.) and 74.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in the mayonnaise bottle, and the comparative sample 1 was ground using the paint shaker for 2 hours, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

(Comparative Example 2) 25.0 parts of Comparative Sample 1
0.5 parts of xanthan gum (trade name "Road Poll 2"
3 ", manufactured by Rhone Poulin) and 1.0 part of chitin
Chitosan (trade name "Green Messe 21", manufactured by Nagasaki Shoji Co., Ltd.) and 73.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in this mayonnaise bottle, and a comparative sample 1 was prepared using the paint shaker.
Was ground for 2 hours while the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

(Comparative Example 3) 20.0 parts of inventive sample 1
And 0.5 part of CMC and 79.5 parts of distilled water.
The mixture was weighed into a 0 ml volume mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in the mayonnaise bottle, and the comparative sample 1 was ground using the paint shaker for 2 hours, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

Comparative Example 4 20.0 Parts of Sample 1 of the Present Invention
, 0.5 parts of guar gum, and 79.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were added to the mixture. A paint shaker was set in the mayonnaise bottle, and the comparative sample 1 was ground using the paint shaker for 2 hours, and at the same time, the mixture was uniformly suspended. From this mixed suspension, a suspension in water was obtained by removing the glass beads.

Comparative Example 5 20.0 Parts of Sample 1 of the Present Invention
, 0.5 part of sodium alginate and 79.5 parts of distilled water were weighed into a 500 ml mayonnaise bottle, and glass beads were put into the mixture. A paint shaker was set in the mayonnaise bottle, and the comparative sample 1 was ground using the paint shaker for 2 hours, and at the same time, the mixture was uniformly suspended. From this mixed suspension,
The suspension in water was obtained by removing the glass beads.

Comparative Example 6 A commercially available golf course algal control agent, holon killer (amino acid metal soap, containing 1.5% of Ag) was prepared.

Test Example 1 Formulation Examples 1-3, Examples 1
4 and the silver content of the silver-loaded zeolite or suspension in water obtained in Comparative Examples 1 to 5 were measured by atomic absorption spectrometry. The results are shown in Table 1.

(Test Example 2)-Test of insecticidal effect on soil nematodes-The following suspension tests were carried out on the suspensions in water obtained in Examples 1, 4 and Comparative Example 1.

The suspension in water was diluted with water to prepare a dilution adjusting solution having a silver concentration of 0.1, 1.0, 10, or 100 ppm.
Potato cyst nematode and southern segusa nematode were put. This soil-nematode-containing solution was added to the WP medium on day 3 after transplanting hairy roots of cucumber in an amount corresponding to the amount of the above-mentioned soil nematode of about 600 heads. Seven days after the addition, the hairy roots of cucumber were stained with acidic fuchsin, and the number of root invading nematodes was counted. The same test was performed using distilled water instead of the dilution adjusting solution. The results are shown in Table 2.

(Test Example 3)-Test of insecticidal effect on soil nematodes-The following suspension tests were carried out on the water-suspended preparations obtained in Examples 1, 4 and Comparative Example 1.

The above suspension preparation in water was diluted with water to prepare a dilution adjusting solution having a silver concentration of 0.1, 1.0, 10, or 100 ppm. 1/500
The root-knot nematode-contaminated soil filled in the 0a Wagner pot was submerged. The amount of the drug used was 1.5 l per 2 l of the root-knot nematode contaminated soil. After 2 hours or 20 hours had elapsed since the start of the flooding treatment, the diluted adjustment liquid was extracted from the root-knot nematode-contaminated soil. Two hours after withdrawing the diluted solution, cucumber is sown on the flooded soil. After 20 days, the cucumber plant is dug out, and the ground measurement of the cucumber and observation of the goal occurrence are conducted. Was. Further, the same test using distilled water instead of the dilution adjusting solution, and the same test using distilled water instead of the dilution adjusting solution and further using autoclave-sterilized root-knot nematode-contaminated soil were performed. The results are shown in Table 3.

The "Nekob index" in Table 3 is the "goal index" obtained from the observation results based on the following criteria.
Was determined by the following equation using

Goal index 0: No goal set 1: Goal is slightly set 2: Goal formation is small to the whole root system 3: Goal set in the entire root system Grade 4: A large degree of goal formation was observed in the entire root system (Nekob index) = {Σ (Goal index × class value × number of strains belonging to the same class) / (total number of surveyed strains) × 4} × 100 ( Test Example 4)-Killing effect test on algae in golf course and phytotoxicity test on turf-The suspension in water obtained in Example 3, Example 4, Comparative Example 3 and Comparative Example 6 is as follows. The test was performed.

The above suspension preparation in water was diluted with water to prepare a dilution adjusting solution having a silver concentration of 250 or 500 ppm. In addition, small planter (12cm × 25cm × 12
cm) and algae (Nostoc verrucosum) were generated. The diluted adjustment liquid was sprayed on the shreds using a trigger type small sprayer. The application amount was set to be 1 liter per 1 m ² of the planted area of the mackerel. On days 1, 3, 5, 7, and 10 after spraying, observation and investigation of algae and grass were performed. The same test was performed using distilled water instead of the dilution adjusting solution. Table 4 shows the killing effect on algae, and Table 5 shows the phytotoxicity on grass.

The "killing index" in Table 4 is the "killing degree" obtained based on the following criteria from the above observation results.
Was determined by the following equation using In the following formula, “n” indicates the number of repetitions.

Death degree 0: Algae state is the same as before treatment, no change 1: Algae partially discolored to light brown 2: About 30% of algae discolored to light brown 3: About 50% of algae Discolored to light brown 4: About 80% of algae discolored to light brown 5: The entire surface of algae died brown (killing index) = {Σ (killing degree) / n (number of repetitions) x 5} x
100 In addition, “Pharmaceutical damage degree” in Table 5 is indicated according to the following criteria.

-: No phytotoxicity is observed. +: Powdery substance adheres to leaf surface and looks yellowish green as a whole. ++: Powdery substance adheres to leaf surface and yellowish green as a whole. +++: Some of the leaves are browned or yellowed and the leaves are curled vertically. ++++: The leaves are browned, and the curls are browner than the gaps between the leaves. Surface visible +++++: mostly browning and death (Test Example 5)-Killing effect test on moss at golf course and phytotoxicity test on turf-Example 3, Example 4, Comparative Example 3, and comparison The following test was carried out on the water-suspended preparation obtained in Example 6.

The above suspension preparation in water was diluted with water to prepare a dilution adjusting solution having a silver concentration of 250 or 500 ppm. In addition, small planter (12cm × 25cm × 12
cm), and a mulberry (Pencross bentgrass) in which ginkgo moss (Bryum argenteum) is generated was prepared. The diluted adjustment liquid was sprayed on the shreds using a trigger type small sprayer. Spraying amount is 1 m ² of planting area of Shiva.
It was set to 1 liter. After spraying 1, 7, and 1
On the fourth day, an observation survey of Gingoke and Shiva was performed. Also,
The same test was performed using distilled water instead of the dilution adjusting solution. Table 6 shows the killing effect on Gingococcus, and Table 7 shows the phytotoxicity on grass.

The "killing index" and "phytotoxicity" in Table 6 are as shown in Test Example 5.

(Test Example 6)-Test of insecticidal effect on pine wood nematode-The following tests were carried out on the water-suspended preparations obtained in Examples 1 and 2.

The above-mentioned suspension preparation in water was diluted with water to prepare dilution adjustment liquids having silver concentrations of 0.1, 1.0, 10, and 100 ppm. Approximately 250 pine wood nematodes (Bursaphelenchus xylophilius) were placed in 15 ml of each of these diluted solutions, and cultured at 20 ° C. for 24 hours. Then, the number of pine wood nematodes inhabited and the number of dead or paralyzed was measured. The same test was performed using distilled water instead of the dilution adjusting solution. Table 8 shows the results.

(Test Example 7) -Effect test on bacterial wilt disease of rice- The following tests were carried out on the water-suspended preparations obtained in Examples 1 and 2.

The above-mentioned water-suspended preparation was adjusted to a silver concentration of 25,5 or
It was diluted with water so as to be 0 and 100 ppm to prepare a dilution adjusting solution. To 50 ml of these dilutions, 1 ml (5 × 10 ⁶ cfu / ml) of a bacterial solution obtained by culturing Pseudomonas glumae in a YP liquid medium was added, and the resulting liquid was seeded with rice seeds. Was immersed at 32 ° C. for 24 hours, and then seeded in a nursery box. The seeds were raised in the seedling box at 32 ° C. for 2 days for germination, and then the germinated seeds were raised in a constant temperature glass house at 25 to 35 ° C. Six days after sowing, the soil attached to the plant obtained by raising the seedlings was washed off with running water, and the degree of disease of this plant was investigated.
The number of seedlings corresponding to the “degree of disease” determined according to the following criteria was counted. In addition, similar tests were performed without performing the processes (A) to (C). The results are shown in Table 9.

Degree of disease occurrence 0: No disease occurrence 1: Brown seedling of leaf sheath (light growth suppression) 2: Brown seedling of leaf sheath (heavy growth suppression) 3: Withering or non-germination It was calculated by the equation. Healthy seedling rate (%) = {(number of seedlings with zero disease incidence) / (number of investigated seedlings)} × 100 (Test Example 8) -Effectiveness test on bacterial seedling blight- Obtained by Examples 1 and 2. The following test was performed on the obtained suspension preparation in water.

Bacterial blight of rice seedling (Pseudomonas plantarl)
The bacterial solution obtained by culturing i) in 250 ml of YP liquid medium was diluted to 600 ml, and rice seeds were immersed in the diluted bacterial solution and inoculated under reduced pressure for 4 hours. For this rice seed,
(A) A solution prepared by diluting the above-mentioned suspension preparation in water 20-fold with water
(B) immersion in water for 2 minutes.
Treatment immersed in a 00-fold diluted solution for 24 hours, or
(C) A treatment of spraying a solution obtained by diluting the suspension preparation in water 7.5-fold with water at a rate of 30 ml per 1 kg of rice seeds was performed, and then the seeds were seeded in a nursery box. In the nursery box, the rice seeds were raised at 32 ° C. for 2 days for germination, and then the germinated rice seeds were raised in a constant temperature glass house at 25 to 35 ° C. Thirteen days after sowing, the soil attached to the plant obtained by raising the seedlings was washed off with running water, the degree of disease of this plant was investigated, and the number of seedlings corresponding to the “degree of disease” determined according to the following criteria was determined. Measured. In addition, similar tests were performed without performing the above-described processes (A) to (C).
The results are shown in Table 10.

Degree of disease occurrence 0: No disease occurrence 1: Yellowing (lightness) 2: Yellowing (heavyness) 3: Withering or non-germination Calculated. Healthy seedling rate (%) = {(number of seedlings with zero disease incidence) / (number of investigated seedlings)} × 100 (Test Example 9) —Effect test on rice blight seedling disease— Obtained by Examples 1 and 2. The following test was performed on the suspension preparation in water.

For naturally infected rice seedlings (Gibberella pojikoroi), (A) the above-mentioned suspension formulation in water was
(B) immersing the suspension in water in a 200-fold diluted solution with water for 24 hours, or (C) immersing the suspension in water with water for 7 hours. .5
After spraying 30 ml per 1 kg of the paddy rice seed with the diluted solution, the paddy rice seed was sown in a nursery box. In the seedling raising box, the rice seeds are raised at 32 ° C. for 2 days to germinate.
The seedlings were raised in a constant temperature glass house at 35 ° C. Thirteen days after sowing, the soil on the plant obtained by raising the seedlings was washed off with running water, and the extent of the disease of this plant was investigated. In addition, a test in which the processes (A) to (C) were not performed was simultaneously performed.
The results are shown in Table 11.

(Test Example 10)-Storage stability test of suspension in water-The following test was carried out on the suspension in water obtained in Example 1, Comparative Example 4, Comparative Example 5, and Comparative Example 6. went.

Each of the above-mentioned suspension formulations in water was placed in a thermostat at 40 ° C. for 3 hours.
Stored for months. The solid-liquid separation state of each of these suspension preparations in water before storage and every month was observed, and the dispersion stability during long-term storage was evaluated. The results are shown in Table 12.

The evaluation was based on the following criteria. ：: No change from the state immediately after production ：: Silver-supported zeolite particles settled slightly, but good redispersibility △: Silver-supported zeolite particles settled clearly, but good redispersibility × : The silver-carrying zeolite particles settled remarkably, or agglomerates were generated and did not redisperse

[0065]

[Table 1]

[0066]

[Table 2]

[0067]

[Table 3]

[0068]

[Table 4]

[0069]

[Table 5]

[0070]

[Table 6]

[0071]

[Table 7]

[0072]

[Table 8]

[0073]

[Table 9]

[0074]

[Table 10]

[0075]

[Table 11]

[0076]

[Table 12]

The results of the above test examples can be interpreted as follows.

As can be seen from Test Examples 2 and 3, the silver-carrying zeolite used in the aqueous suspension formulation for agricultural and horticultural use according to the present invention was selected from the group consisting of root-knot nematode, root-knot nematode, and nematode It is also clear that they show insecticidal activity against the root-knot nematode by waterlogging treatment.

As can be seen from Test Examples 4 and 5,
The silver-supported zeolite used in the agricultural and horticultural water-based suspension formulation according to the present invention is apparently having a high control effect on algae and moss, regardless of the type of zeolite crystal used as a raw material. Moreover, no adverse effects such as chemical injury are observed on the bentgrass. In each of the test examples, the control effect was low when the amount of silver supported zeolite as the active ingredient was about 20%.

Further, from Test Examples 6 to 9, a high control effect was also observed on pine wood nematodes and various plant bacterial diseases. In addition, from Test Example 10, the specific gravity is generally large (2.3 to 2.5 g / cm ³ ) like zeolite carrying silver.
Although it is difficult to obtain a long-term storage-stable aqueous suspension using solid powder, the agricultural / horticultural water-based suspension according to the present invention retains excellent long-term storage stability. Obviously.

[0081]

The aqueous suspension formulation for agricultural and horticultural use according to the present invention comprises:
It has a high insecticidal effect on nematodes parasitic on plants, has a high algicidal effect on algae propagating on plants, and also has a high control effect on plant pathogenic bacteria and moss.

The agricultural and horticultural water-based suspension formulation according to the present invention hardly causes phytotoxicity to plants, is highly safe, and has no concern about deteriorating the environment.

Therefore, the aqueous suspension formulation for agriculture and horticulture according to the present invention can be used particularly effectively for, for example, agricultural crops and bentgrass of golf courses.

Further, the aqueous suspension formulation for agriculture and horticulture according to the present invention has excellent long-term storage stability and can be used even after long-term storage.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Satoshi Matsunaga 2-9-9 Minamiei, Kagoshima City, Kagoshima Prefecture Sankei Chemical Co., Ltd. F-term (reference) 4H011 AA01 AC01 AD01 BA01 BB18 BC18 BC19 DA02 DA15 DC05 DD01 DD03 DD04 DG16 DH14

Claims (5)

[Claims] An agricultural and horticultural water-suspended preparation comprising as an active ingredient a silver-carrying zeolite comprising zeolite carrying silver ions at a ratio of 20 to 40%. 2. The silver-supported zeolite has an average particle size of 0.8 to 0.8.
The aqueous suspension formulation for agriculture and horticulture according to claim 1, which is 1.5 µm particles. 3. The silver-supported zeolite is 10 to 40% by weight, xanthan gum is 0.1 to 1% by weight, and water is 59 to 8%.
The aqueous suspension formulation for agriculture and horticulture according to claim 1, which contains 9.9%. 4. The aqueous suspension formulation for agricultural and horticultural use according to claim 1, which is for nematicides. 5. The method according to claim 1, which is for algicidal use.
Item 10. The aqueous suspension formulation for agricultural and horticultural use according to item 7.