JP2002053405A - Agrochemical preparation floating on water surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agrochemical preparation having excellent dispersibility of the agrochemical component, causing little adverse effect on crops and outflow of agrochemical to an area other than the paddy field by the quick submersion of the carrier into water after dispersion and producible at a low cost. SOLUTION: The agrochemical preparation contains an agrochemical component, a porous carrier having an average particle diameter of 10-100 μm, a surfactant, a binder and a highly water-absorbing polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-surfacing pesticide preparation, and more particularly, to a pesticide preparation or a pesticide preparation packed in a water-soluble bag into a paddy field without using a machine. , A so-called “jumbo agent”.

[0002]

2. Description of the Related Art In recent years, as the agricultural population has been decreasing, aging and becoming part-time workers, there has been a demand for a labor-saving spraying method that does not require the use of machinery to enter rice paddies as much as possible. On the other hand, there is a growing interest in the environmental impact of pesticides, and there is a need for pesticide formulations and spraying techniques that can easily apply an appropriate amount of pesticide and that have little effect on the outflow of the chemical to areas other than the treated farmland and the effect on sprayers.

Under such circumstances, a so-called "jumbo agent" in which several tens of grams of an agricultural chemical formulation or an agricultural chemical formulation packaged in a water-soluble bag is thrown into a paddy field without using a machine to drop the active ingredient is used in an appropriate amount. It can be easily sprayed, is not easily affected by the weather at the time of spraying, does not scatter the drug outside the target area, and has very little risk of the sprayer touching the pesticide. is there.

Since the jumbo agent is locally applied in the target paddy field, it is important to have good diffusibility from the viewpoint of stabilizing the effect and avoiding phytotoxicity. And those that have the least impact on the environment are required. In addition, it is important for practical use to provide a stable preparation at a relatively low price.

[0005] Regarding the form of the jumbo agent,
No. 92004, JP-A-6-221604, and JP-A-11-240803 disclose that carbon dioxide is generated when dropped into water by combining a solid acid and a carbonate or bicarbonate, There has been proposed an effervescent preparation in which an agricultural chemical component is dispersed in water. This effervescent jumbo agent has a certain effect on the diffusion of active ingredients into water due to the generation of carbon dioxide.However, once the formulation sinks on the surface of soil under paddy water and comes into contact with soil, There is a high risk that active ingredients remain locally and cause phytotoxicity to target crops and subsequent crops. In addition, a small amount of water in the preparation easily initiates the neutralization reaction during storage, and the generated water further promotes the reaction, so that the outer package does not swell during the storage period or foaming does not occur when actually sprayed. It has some disadvantages.

[0006] Japanese Patent Application Laid-Open No. H11-1402 discloses that particulate matter containing a pesticidally active ingredient, which has once settled, is brought to the surface of water by air contained (held) in the particulate matter as the water-soluble carrier dissolves in water. Formulations that float and disperse have been proposed. This technology has the advantage that the formulation itself is heavy and scattering is small even if it is not wrapped in water-soluble packaging.However, in the case of pesticides with strong soil adsorption, pesticide components tend to remain in the sedimented parts, Uniform dispersion is not enough.
In addition, special techniques are required for manufacturing, and problems such as corrosion of manufacturing machines by water-soluble carriers and the need to strictly adjust the temperature and humidity of the place where manufacturing equipment is installed to prevent deliquescence of water-soluble carriers. is there.

[0007] Among the jumbo preparations, a "water-floating preparation" for dispersing and dissolving an active ingredient in paddy water and reaching a target organism is a pesticide that is located away from soil having a property of strongly retaining pesticides, that is, the surface of paddy rice paddies. It has the characteristic of floating components. The pesticide components are dispersed in water at a high speed, and are uniformly dispersed and dissolved in the surface water by gravity and convection of water, and exert an effect on the target organism through processes such as being more uniformly held on the soil surface. It is a very good formulation.

[0008] JP-A-8-99803, JP-A-10-99803
-265302 and JP-A-10-287505
In Japanese Patent Application Laid-Open Publication No. H11-163, an example of preparing a floating agent using a kneading granulation method is proposed. However, the kneading granulation method, which is widely used in the production of agricultural chemicals, generally requires a high cost because the steps are relatively complicated and require a drying step. Also, when using coarse particles with large voids to make the kneaded granules have floating properties, the screen must be damaged when trying to pass through the screen for granulation, or a large amount of kneading water must be added. Often not. In general,
When performing granulation including the kneading method, a constant force is applied to the raw material powder in the presence of a binder, but the force applied to the particles destroys the structure when using coarse particles with large voids It is likely to impair the original buoyancy. Further, the heat applied in the drying step may cause decomposition of some pesticide components, generate a bad smell, or impair the action of the surfactant.

JP-A-11-315004, JP-A-6-336403 and JP-B-3-76281 disclose a technique of a floating agent prepared by coating or adsorption using a base material having voids. Proposed.
Although these methods have solved the drawbacks of the kneading method, the carriers shown in the examples have very high floating properties, and after the formulation is sprayed and the pesticide components are released into water, the carrier is placed on the surface. Remains on the water surface for a long time. For this reason, the carrier remaining on the water surface has a disadvantage that the growth of the crop in the place blown by the wind is hindered, and there is a high possibility that the carrier will flow out of the farmland.

Japanese Patent Application Laid-Open No. Hei 10-109905 discloses a floating agent for water application having an average particle size of 50 μm or less comprising an anionic surfactant and an inorganic or organic carrier. The pesticidal active ingredient is supported on the buoyant grain nucleus, and a water surface spreader and an emulsifying dispersant containing at least one glucose residue in its molecular structure are blended. Pesticide formulation,
Japanese Unexamined Patent Publication (Kokai) No. 5-155709 proposes a floating agent for water application having an average particle size of 50 μm or less, comprising an anionic surfactant and an inorganic or organic carrier.
These illustrate techniques including embodiments that may avoid the disadvantages of the techniques described above. That is, there is little storage problem, there is little damage to the manufacturing machine, and there is a possibility that the manufacturing can be performed at a relatively low cost. In addition, it is considered that the technology includes a technique for preparing a floating agent that is less likely to cause damage to crops caused by the carrier remaining on the water surface after spraying the floating agent and to flow out of a paddy field.

However, after the release of the active ingredient, it is advantageously used to reduce the residual carrier on the water surface.
Particles smaller than 00 microns have a very large surface area per unit weight as compared to a coarser carrier, and therefore tend to have greater agglomeration between the particles. For this reason, when the formulation is sprayed on the paddy surface, it does not spread forever and prevents the release and uniform distribution of the active ingredient, and the effect of the pesticide component is insufficient, while causing phytotoxicity and local residue Become.

[0012]

DISCLOSURE OF THE INVENTION The present invention relates to a paddy field which is capable of releasing the active ingredient well after spraying and maintaining the property that the carrier sediments in a relatively short time, while resisting the cohesion between grains. The purpose of the present invention is to provide a preparation in which the drug is spread and the active ingredient is rapidly released into water. In addition, the present invention can be manufactured at low cost in a simple process using commonly used agricultural chemical equipment, has excellent effects after spraying, has little effect on crops and the environment, and especially after a certain period of time, the carrier disappears from the water surface. An object of the present invention is to provide an agricultural chemical formulation that can be easily sprayed without using a machine by packaging the water-surface floating formulation and a water-soluble material such as a polyvinyl alcohol film.

[0013]

Means for Solving the Problems The present inventors have developed an agricultural chemical component,
By preparing an agrochemical formulation comprising a porous carrier having an average particle size of 10 to 100 microns, a surfactant, a binder and a superabsorbent polymer, when the formulation is sprayed on a paddy surface,
It has been found that the superabsorbent polymer expands due to water absorption and expands the intergranular space, thereby promoting the expansion and realizing the rapid dispersion and dissolution of the pesticide component in water.

That is, the present invention provides an agricultural chemical component having an average particle size of 10
~ 100 micron porous carrier, surfactant, binder,
And a pesticide formulation containing a superabsorbent polymer.

The average particle size of the porous carrier used in the present invention is 10 to 100 microns. If the average particle size of the porous carrier is 100 microns or more, the carrier may remain for a long time while floating on the surface of the paddy field, impeding the growth of rice in the blown portion or flowing out of the target paddy field. There is. On the other hand, in a preparation using a porous carrier having an average particle diameter of 10 to 100 microns, the porous carrier remaining on the water surface after the release of the pesticide component gradually absorbs water and loses buoyancy,
After a few hours, submerge in water. Therefore, it does not affect rice or flow out of the target paddy field. Like this
By using a porous carrier of 10 to 100 microns,
It is possible to prepare a preparation having little effect on useful plants after application.

Further, in the present invention, a surfactant and a polymer water-absorbing material are simultaneously added to the preparation to further enhance the dispersibility of the preparation and effectively prevent the stability of the preparation from lowering due to moisture in the preparation. I can do it.

The mixing ratio of these components in the preparation can be appropriately determined according to the type of the porous carrier used and the desired disintegration time. However, taking into account the effect of the residual drug on the crop, the porosity per preparation weight is considered. 5-70% by weight of a water-soluble carrier, 0.5-20% by weight of a surfactant, 0.1-1% of a polymer water-absorbent
5% by weight, preferably 10 to 60% by weight of a porous carrier, 3 to 15% by weight of a surfactant, and 0.5 to
10% by weight.

The thus obtained pesticide formulation is
100 g can be further packaged with a water-soluble material such as a polyvinyl alcohol film to enhance the storage stability, and can be put into a suitable form by directly putting it into a paddy field without using any equipment. It is possible to provide a pesticide formulation that is excellent, saves labor, and places little burden on the sprayer and the environment.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTIONPesticide ingredients  In the present invention, the pesticide components used are not limited, and
Anilofos, ethoxysulfuron, benfresate,
Daimron, oxadiazon, oxadialgyl, ben
Zofenap, Kromeprop, Bifenox, Pro
Chloraz, iprodione, fosetyl, fipronil, na
Lock, bamidion, and silafluofen.
Pesticide components that can be used in the present invention are not limited to these.
Not alone or in combination of two or more
You can also.Porous carrier  As the porous carrier usable in the present invention, an average particle system
10-100 microns pumice, calcined pumice, processed shira
, Calcined perlite, diatomaceous earth, vermiculite,
Foam glass, water-repellent inorganic or organic granules, plants
Pulverized materials, waste paper granules, and the like can be exemplified. Book
The porous carriers usable in the invention are not limited to these.
Not alone or in combination of two or more
Buoyancy can be given with small specific gravity and small addition amount.
Use of processed shirasu is preferred
No.Surfactant  As the surfactant, for example, fatty acid soap, sulfated oil,
Higher alcohols and olefin sulfates, al
Alkyl sulfate, alkyl sulfonate, alkyl alcohol
Reel sulfonate, sulfosuccinate, fatty acid
Midosulfonate, lignosulfonate, alkyl phosphoric acid
Ester, alkyl ether phosphate, alkyl ester
-Tel, alkyl phenyl ether, alkyl phenyl
Ether condensate ether, alkyl ester, alkyl
Amine, alkyl amide, polyoxypropylene ether
Oil, vegetable oil ether, allyl phenyl ether, glycer
Phosphoric acid fatty acid ester, sorbitan fatty acid ester, poly
Oxyethylene sorbitan fatty acid ester, resin acid copo
Examples include, but are not limited to, limmer salts and polyethers.
It is not something to be done. These may be used alone or preferably
Mix and use seeds. The amount of addition is 0.5 to
It is 20% by weight, preferably 3 to 15% by weight.Binder  Examples of the binder include hydrocarbons and chlorinated paraffins.
, Polybutene, alcohols, esters, animals and plants
Examples of oils, silicone oils, and ethers
However, the present invention is not limited to these. These fields
The ingredients can be used alone or as a mixture of two or more.
You. The amount of addition is 0.5-30% by weight per formulation weight, preferably
Or 1 to 20% by weight.Polymer water absorber  As the polymer water absorbent, for example, a cross-linked polyacrylate
Based, isobutylene / maleate based, starch / polya
Crylate salt type, polyvinyl alcohol (PVA) / poly
Acrylate type, hydrolyzate of acrylic fiber, crosslinked P
VA system, starch / polyacrylic, cross-linked carboxymethyl
And cellulose (CMC).
However, the present invention is not limited to these. In particular, starch
/ Polyacrylates are preferred because of their easy biodegradability
Suitable. The blending amount of the polymer water absorbent is 0.1 to 15 weight
%, Preferably 0.5 to 10% by weight.

In the present pesticide preparation, a general inert carrier in an amount necessary for preparation of the preparation can be used in addition to the porous carrier. Examples of such a carrier include, for example, water-soluble substances such as mineral substance fine powder, synthetic silica, crushed natural and synthetic polymer, wood flour, crushed plant and plant material, waste paper, saccharides, and salts. It is not limited to these. These raw materials can be used alone or in combination of two or more. The amount used is 1 to 80% by weight, preferably 2 to 50% by weight. In addition, a stabilizer, a physical property improving agent, a coloring matter, a deodorant, a fragrance and the like can be added as needed.

Further, in the present invention, it is preferable to coat the preparation with a water-soluble material. Examples of the water-soluble material that can be used here include polyvinyl alcohol film, modified polyvinyl alcohol film, water-soluble paper, starch film, and these. However, the present invention is not limited thereto. Hereinafter, the present invention will be described specifically with reference to Examples. The blending amounts are% (% by weight) per the weight of the preparation.

[0022]

Examples Example 1 Anilophos 13.0 Benfresate 12.0 Ethoxysulfuron 0.67 Surfactant (olefin sulfonate) 1.5 Surfactant (alkylnaphthalene sulfonate) 2.0 Surfactant ( Dialkyl sulfosuccinate salt) 3.5 Surfactant (resin acid copolymer salt) 3.0 Partial sodium salt of starch acrylic acid graft polymer 4.00 Synthetic silica 10.0 Fine powder clay 10.0 Spindle oil 6.0 Processed shirasu (Average particle size of 80 microns) is added to make up the total to 100% by weight.

The components except for the spindle oil and the processed shirasu were mixed with a mixer and then ground with a hammer mill to prepare a raw powder. The processing shirasu was added to a mixing granulator Spartan Ruder (manufactured by Dalton Co., Ltd.), and spindle oil was added to the mixture while operating to sufficiently infiltrate. The bulk powder was further charged, and the spartan ruder was operated for 5 minutes to obtain a preparation. Formulation 10 in which 33 g of this formulation was packed in a PVA pack
Zero is sprayed per paddy field ha.

Example 2 Oxadicromefone 2.4 Benzofenap 18.01 Ethoxysulfuron 0.67 Surfactant (acetylene type) 1.0 Surfactant (alkyl naphthalene formalin condensate) 4.0 Starch acrylic acid graft Polymer partial sodium salt 4.00 Urea 15.0 Spindle oil 5.0 Add working shirasu (average particle size 80 microns) to bring the total to 100% by weight.

A floating pesticide formulation was obtained in the same manner as in Example 1. Formulation 10 in which 33 g of this formulation was packed in a PVA pack
Zero is sprayed per paddy field ha.

Example 3 Oxadicromefone 2.4 Benzofenap 18.01 Ethoxysulfuron 0.67 Surfactant (lauryl sulfate salt) 2.0 Surfactant (lignin sulfonate) 4.0 Surfactant (dialkyl Sulfosuccinate salt) 3.5 Starch acrylic acid graft polymer partial sodium salt 4.00 Glucose 15.0 Spindle oil 5.0 Add processed shirasu (average particle size 80 microns) to make the whole 100%.

A floating pesticide formulation was obtained in the same manner as in Example 1. Formulation 10 in which 33 g of this formulation was packed in a PVA pack
Zero is sprayed per paddy field ha.

Example 4 Anilophos 8.0 Benfresate 7.0 Ethoxysulfuron 0.4 Daimulon 6.0 Surfactant (fatty acid alkyl oxide phosphate ester salt) 2.0 Surfactant (lignin sulfonate) 0 Surfactant (dialkyl sulfosuccinate salt) 3.5 Starch acrylic acid graft polymer partial sodium salt 4.00 Synthetic silica 10.0 Potassium chloride 10.0 Kenaf powder 10.0 Rapeseed oil 6.0 Calcined pumice (average) (Particle size 80 microns) to bring the total to 100%.

A floating pesticide formulation was obtained in the same manner as in Example 1 except that the mixing apparatus was a planetary mixer. 100 formulations prepared by packing 50 g of this formulation into a PVA pack are sprayed per ha of paddy field.

Comparative Example 1 A floating preparation 1 was obtained in the same manner as in Example 1 except that the starch acrylic acid graft polymer partial sodium salt was omitted from Example 1 according to the present invention.

Comparative Example 2 A floatable comparative preparation 2 was obtained in the same manner as in Example 1 except that the processed shirasu of Example 1 according to the present invention was changed to one having an average particle diameter of 600 μm.

Test Example 1 Tap water was added to a depth of 6 cm (hard water volume: 38.4 liters) to a hard vinyl chloride girder having a width of 16 cm, a height of 12 cm, and a length of 400 cm with both ends closed. 0.21 g of the preparation prepared in Example 1 was used as a bag 2c made of a polyvinyl alcohol film.
m × 3 cm (Sorblon PT40 micron, manufactured by Aicello Chemical Co., Ltd.)
, 3.0 m and 3.8 m, water was sampled and analyzed for pesticide components in the water. At the same time, the state of the preparation was observed. The measurement and observation results are as shown in Table 1.

[0033]

[Table 1] After the drug was dropped, the fine particles spread on the water surface after the bag was broken, and the active ingredient was well dispersed, and spread over the entire surface within 3 minutes after the introduction. Grains that settled at the bottom were hardly observed.
Five hours after the introduction, the carrier was submerged in water and did not remain on the water surface.

Test Example 2 In the same manner as in Test Example 1, the preparation of Example 2 was tested. The measurement and observation results are as shown in Table 2.

[0035]

[Table 2] Almost the same results as in Test Example 1 were obtained, and the fine particles spread on the water surface after the bag was broken, and the active ingredient was well dispersed.
Spread out within minutes. Grains that settled at the bottom were hardly observed. Five hours after the introduction, the carrier was submerged in water and did not remain on the water surface.

Test Example 3 In the same manner as in Test Example 1, the preparation of Example 3 was tested. The measurement and observation results are as shown in Table 3.

[0037]

[Table 3] Almost the same results as in Test Example 1 were obtained, and the fine particles spread on the water surface after the bag was broken, and the active ingredient was well dispersed.
Spread out within minutes. Grains that settled at the bottom were hardly observed. Five hours after the introduction, the carrier was submerged in water and did not remain on the water surface.

Test Example 4 The preparation of Example 4 was tested in the same manner as in Test Example 1 except that the amount of the drug was 0.32 g. The measurement and observation results are as shown in Table 4.

[0039]

[Table 4] Almost the same results as in Test Example 1 were obtained, and the fine particles spread on the water surface after the bag was broken, and the active ingredient was well dispersed.
Spread out within minutes. Grains that settled at the bottom were hardly observed. Five hours after the introduction, the carrier was submerged in water and did not remain on the water surface.

Test Example 5 The preparation of Comparative Example 1 was tested in the same manner as in Test Example 1. The measurement and observation results are as shown in Table 5.

[0041]

[Table 5] Comparative Example 1 in which the superabsorbent polymer was removed as compared with Example 1.
In the case of the preparation, the lump remained on the water surface and the dispersion of the active ingredient was poor. That is, after the drug was dropped, the fine particles began to spread on the water surface after breaking the bag of PVA, but the lump remained during the test period. Also, almost no grains were settled at the bottom of the tongue.

Test Example 6 In the same manner as in Test Example 1, the preparation of Comparative Example 2 was tested. The measurement and observation results are as shown in Table 6.

[0043]

[Table 6] After the drug was dropped, the fine particles spread on the water surface after the PVA was broken, and spread over the entire surface within 3 minutes after the introduction. Almost no particles settled at the bottom, but carrier residue remained on the water surface during the test period. The preparation of Comparative Example 2 in which the processed shirasu of Example 1 had an average particle diameter of 600 microns had good dispersion of the preparation on the water surface and good dispersion of the active ingredient in water, but the carrier residue remained even after 24 hours. Was left.

As described above, the water-floating pesticide formulation according to the present invention releases and distributes the pesticide components in paddy fields in a favorable manner, exerts an even effect, and does not cause chemical damage or affect crops.
Furthermore, since the buoyant carrier is submerged in water for a short period of time, it does not adversely affect crops or flow out of paddy fields.

[0045]

EFFECTS OF THE INVENTION The preparation of the present invention is said to have excellent dispersibility of the pesticidal active ingredient, and that the carrier is immediately immersed in water after dispersing, so that adverse effects on agricultural crops and the outflow of pesticides to areas other than paddy fields are small. Has features. In addition, it can be easily produced by a commonly used agricultural chemical production facility, has excellent storage stability, and can be obtained as a safe and highly effective jumbo agent by packaging with a water-soluble film.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A01N 43/56 A01N 43/56 BD 43/824 47/22 G 47/22 47/30 C 47/30 47/36 101E 47/36 101 47/38 B 47/38 55/00 D 55/00 57/12 H 57/12 F 57/32 102 57/32 102 43/82 101E 101A (72) Inventor Haruki Inami 2894-1, Naruto, Naruto-cho, Sanmu-gun, Chiba Prefecture Aventis CropScience Japan Co., Ltd. Naruto Research Laboratory F term (reference) 4H011 AA01 AB02 AC01 BA01 BA05 BB06 BB09 BB10 BB13 BB14 BB16 BB17 BC01 BC02 BC03 BC04 BC06 BC07 BC20 BC17 BC18 BC19 BC20 BC22 DA02 DA04 DD02 DE17 DH02 DH25

Claims (10)

[Claims] 1. A pesticide formulation comprising a pesticide component, a porous carrier having an average particle size of 10 to 100 microns, a surfactant, a binder, and a superabsorbent polymer. 2. A porous carrier 3 having an agrochemical component of 0.1 to 60% by weight and an average particle size of 10 to 100 microns per formulation weight.
~ 60% by weight, surfactant 1 ~ 25% by weight, binder 1 ~
The pesticide formulation according to claim 1, comprising 30% by weight and 1 to 25% by weight of a superabsorbent polymer. 3. The pesticidal preparation is anilofos, ethoxysulfuron, benfresate, dimelone, oxadiazon, oxadialgyl, benzofenap, clomeprop, bifenox, prochloraz, iprodione,
The agricultural chemical formulation according to claim 1, wherein the formulation is one or more selected from the group consisting of fosetyl, fipronil, nac, bamidion, and silafluofen. 4. 4. A porous carrier comprising pumice, calcined pumice, processed shirasu, calcined perlite, diatomaceous earth, vermiculite,
The pesticide according to claim 1, wherein the pesticide is at least one selected from the group consisting of foamed glass, water-repellent inorganic or organic granules, plant pulverized materials, and recycled paper granules. 4. Formulation. 5. The surfactant comprises a fatty acid soap, a sulfated oil,
Higher alcohol and olefin sulfate, alkyl sulfate, alkyl sulfonate, alkyl aryl sulfonate, sulfosuccinate, fatty amide sulfonate, ligno sulfonate, alkyl phosphate, alkyl ether phosphate, alkyl ether, alkyl phenyl ether, alkyl phenyl ether condensation Product ether, alkyl ester, alkylamine, alkylamide, polyoxypropylene ether, vegetable oil ether, allylphenyl ether, glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and one selected from the group consisting of polyethers Or the pesticide formulation according to claim 1 or 2 which is two or more kinds. 6. The superabsorbent polymer is a crosslinked polyacrylate, isobutylene / maleate, starch / polyacrylate, polyvinyl alcohol (PVA) /
The polyacrylic acid salt, a hydrolyzate of acrylic fiber, crosslinked PVA, starch / polyacryl, and one or more selected from the group consisting of crosslinked carboxymethylcellulose (CMC). 3. The pesticide preparation according to 2. 7. The binder according to claim 1, wherein the binder is one or more selected from the group consisting of hydrocarbons, chlorinated paraffins, polybutenes, alcohols, esters, animal and vegetable oils, silicone oils, and ethers. The pesticide preparation according to claim 2. 8. A water-surfacing pesticide formulation comprising 10 to 100 g of the pesticide formulation according to claim 1 coated with a water-soluble material. 9. The water-soluble material according to claim 8, wherein the water-soluble material is at least one selected from the group consisting of a polyvinyl alcohol film, a modified polyvinyl alcohol film, a water-soluble paper, a starch film, and a composite thereof. Water-surfacing pesticide formulation. 10. Use of the pesticide preparation according to any one of claims 1 to 9.