JPH0578207A - Packed material of agricultural chemical formulation for submerged application packaged with water-soluble film - Google Patents

Abstract

PURPOSE:To simply carry out agent treatment by throwing a packed material of agricultural chemical formulation for submerged application packed with a water-soluble film into a water system such as paddy field. CONSTITUTION:A formulation of efficiently applying an active component into water surface to control harmful organisms is processed and packed with a water-soluble film. The packed material is thrown into a water system such as paddy field from a levee so that the film is dissolved, the active component in the formulation is efficiently diffused on to water surface and harmful organisms cam be controlled in higher activity than application of the formulation by a common method. The simple treatment of this invention does not require use of an applicator and an operator does not need direct contact with the formulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention does not use a sprayer by throwing a water-spreadable agricultural chemical formulation packaged in a water-soluble film into a water system that needs to control pests such as paddy fields. The chemicals can be easily treated, and after the water-soluble film is dissolved in water, the pesticide active ingredient (hereinafter referred to as the active ingredient) spreads on the surface of the water. It is about technology that can be spread.

[0002]

2. Description of the Related Art A pesticide formulation that spreads on the water surface reduces contact with the soil and prevents a decrease in efficacy due to adsorption of active ingredients in the soil.
It is used for the purpose of efficiently spreading the active ingredient evenly on the water surface and efficiently controlling pests that live in water or on the water surface (for example, plants). In the old days, the active ingredient was added to petroleum solvents such as kerosene and machine oil. It is known that it was dissolved and spread on the water surface, and many studies have been conducted so far.
For example, in the case of liquid preparations, Japanese Patent Publications No. 410036 and No. 410037 have a composition for reducing phytotoxicity. In the solid state, the active ingredient is dissolved with a solvent having a low specific gravity or a surfactant. There is disclosed a method of imparting water surface developability to a solid material such as granules and the like and holding the solid material in a granular form (Japanese Patent Publication No. 63-30281, Japanese Patent Laid-Open No. 63-17802, Japanese Patent Laid-Open No. 1-254604). In addition, the packaging of pesticide formulations using a water-soluble film should prevent users from inhaling the powder or directly touching the drug when diluting a powdering formulation such as a wettable powder with water to create a spray drug solution. It is used for the purpose. On the other hand, there has been a conventional idea of throwing a package made of a water-soluble film into an aqueous system and simply treating the package (Japanese Patent Laid-Open No. Sho 5).
3-99327), it is far from practical use, such as being strongly affected by wind in the state of being suspended in a water system, and none is used in the agrochemical industry. As in the present invention, a formulation having good spreadability on the water surface is packaged and thrown directly into the water system for convenient and hygienic use, and the activity is impaired by adsorption of the drug to the carrier or deviation in the water system due to wind or the like. There is still no packaging technology that prevents it from happening.

[0003]

Agricultural chemicals are generally sprayed on a water system by using a sprayer or by hand-spreading. Small-sized sprayers, which are widely used at present, carry them on their backs or carry them. The sprayer is difficult to work because it needs to be operated even in an aqueous system, and it is desirable to have a formulation that can be sprayed more easily.Because there are many opportunities for the sprayer to come into contact with the drug regardless of whether it is a small sprayer or hand spraying. However, a drug that can be more simply and hygienically processed is desired. Of course, the value of this technology will be halved if the activity of the drug is impaired in order to seek such convenience, so it is also possible to maximize the activity of the drug, which is the basis of drug formulation technology development. There must be. The present invention has developed a technique to meet such a demand.

[0004]

The present inventors have arrived at the present invention as a result of earnestly researching a technique for answering the above-mentioned demand. That is, the present invention is an oily preparation in which an active ingredient for controlling pests is dissolved together with a solvent, a surfactant and the like to have water surface spreadability, or this oily material is used as a granular material, a powdery material or the like. A pesticide formulation such as a solid formulation held in a solid matter is packaged in a water-soluble film that is incompatible with the oil used, and this package is thrown directly into a water system such as a paddy field to impair the activity of the drug. Rather improve it,
Provided is a method for simply and hygienically treating an agricultural chemical formulation.

When the package of the present invention is put into a water system, first, the water-soluble film is dissolved in water and an oily substance containing the active ingredient is released as it is or is separated from the solid substance and spreads on the water surface and spreads. In order to cover it, it is necessary to determine the packaging unit and the number of thrown products per unit area depending on the spreading performance of the oily substance and the efficacy of the active ingredient. The active ingredient used in the water-spreading agrochemical formulation is preferably sparingly water-soluble or water-insoluble, and any active ingredient that controls pests by application on the water surface may be used, for example, fields such as agriculture, horticulture, and fisheries It lives in a place where water is accumulated, such as cultivated land (weeds, forests, etc.), and has an activity of controlling insects, weeds, and diseases that are harmful to useful plants or humans and facilities.
For example:

(Insecticide) 1. 1-naphthyl-N-methylcarbamate (NA
C) 2. Metatryl-N-methylcarbamate (MTM
C) 3. 2-Isopropylphenyl-N-methylcarbamate (MIPC) 4. 2-Secondary butylphenyl-N-methylcarbamate (BPMC) 5. 3,4-xylyl-N-methylcarbamate (M
PMC) 6. 2.3-Dihydro-2,2-dimethylbenzofuran-7-yl (dibutylaminothio) methylcarbamate (carbosulfan) 7. On-butyl-O '-(2,2-) dimethyl-
2,3-Dihydrobenzofuran-7-yl) -N, N '
-Thio-dicarbamate (flatiocarb) 8. (RS) α-cyano-3-phenoxybenzyl =
(RS) -2,2-1- (4-ethoxyphenyl) cyclopropanecarboxylate (cycloprotoline)

9. 2-tert-butyl imino-3
-Isopropyl-5-phenyl-3,4,5,6-tetrahydro-2H-1,3,5-thiadiazin-4-one (buprofezin) 10. 2- (4-ethoxyphenyl) -2-methylpropyl = 3-phenoxybenzyl ether (ethofenprox) 11. O, O-dimethyl-O- (methyl-4-nitrophenyl) thiophosphate (MEP) 12. (2-isopropyl-4-methylpyrimidyl-
6) -Diethylthiophosphate (diazinone) 13. S, S '-[2- (Dimethylamino) trimethylene] bis-benzenethionate (bensultap)

(Fungicide) 14. O, O-diisopropyl-S-benzyl thiophosphate (IBP) 15. 3-allyloxy-1,2-benzisothiazole-1,1-dioxide (propenazole) 16. O-ethyl-S, S-diphenyldithiophosphate (EDDP) 17. Diisopropyl-1,3-dithiolane-2-ylidene-malonate (isoptiolane) 18. 3-Isopropoxy-2-methylbenzanilide (mepronil) 19. (E, Z) -4,6-Dimethyl-2- [1- (O
-Tolyl) -1-ethylidene-hydrazino] pyrimidine (meferimzone) 20. 1- (4-chlorobenzyl) -1-cyclopentyl-3-phenylurea (pencyclone)

(Herbicides) 21. 2-chloro-2 ', 6'-diethyl-N- (2-
Propoxyethyl) acetanilide (pretilachlor) 22. α- (2 naphthoxy) propionanilide (naproanilide) 23. 2-methylthio-4,6-bis (ethylamino)
-S-triazine (cimetrin) 24. S-tert-butyl-3- (2,4-dichloro-5-isopropoxyphenyl) -1,3,4-oxadiazolin-2-one (oxadiazone) 25. S- (2-Methyl-1-piperidyl-carbonylmethyl-O, O-di-n-propyldithiophosphate (piperophos) 26. 3-Isopropyl-2,1,3-benzo-thiadianone- (4) -2,2 -Dioxide (Bentazone) 27. 2-Methylthio-4-ethylamino-6- (1,
2-Dimethylpropylamino) -s-triazine (dimetamethrin) 28. Methyl = α- (4,6-dimethoxypyrimidine)
-2-ylcarbamoyl-O-toluate (bensulfuron-methyl) 29. 2-benzothiazol-2-yloxy-N-methylacetanilide (mefanaset) 30. Ethyl-5- (4,6-dimethoxypyrimidine-
2-ylcarbamoylsulfamoyl) -1-methylpyrazole-4-carboxylate (pyrazosulfuron-ethyl)

These are dissolved with an organic solvent or the like and, if necessary, a surfactant, a decomposition inhibitor or the like to obtain a water-spreading oily substance, which is retained as it is or as a solid substance and a water-spreading pesticide. Although it is a formulation, it is not limited to the above active ingredients. Further, the amount of the active ingredient in the water-spreadable pesticide formulation should be considered depending on the performance and physical properties of the active ingredient, but it is 0.1 to 95 in the oily formulation.
% (Weight), 0.01 to 60% (weight) for solid formulations
The degree is appropriate.

The solvent used is used to lower the viscosity of the oily solution when mixed and dissolved, to lower the specific gravity, and to dissolve the solid active ingredient to facilitate the spread on the water surface. As a specific property, a high-boiling point solvent (boiling point is 200 ° C. or higher) that is compatible with the active ingredient (dissolves when the active ingredient is a solid) and is sparingly water-soluble or water-insoluble and has a specific gravity of 1 or less is preferable. Specifically, for example, as a plasticizer for plastics such as dioctyl adipate, diisodecyl adipate, diisononyl adipate, diisodecyl phthalate, dilauryl phthalate, diisononyl phthalate, tributyl phosphate, and tri-2-ethylhexyl phosphate. Examples thereof include those used, aliphatic or aromatic petroleum-based high-boiling point solvents, synthetic compound solvents such as alkylbenzene and methylnaphthalene, animal and vegetable oils, and the like, but they may be used alone or in combination of two or more. The amount of the active ingredient used is not limited, and the physical properties of the active ingredient, control efficacy, etc. can be taken into consideration. If the active ingredient has a low viscosity, it may not be used. Further, a surfactant is used because it has an action of uniformly spreading when an oily substance on the water surface containing an active ingredient is localized as an oil droplet, and specifically, for example, polyoxyethylene and polyoxyethylene are used. Block polymer, polyoxyethylene octyl ether, polyoxyethylene dodecyl ether, polyoxyethylene oleyl ester, polyoxyethylene nonyl phenyl ether, polyoxyethylene sorbitan monooleate, nonionic surfactants, dodecylbenzene sulfonic acid metal salt (Hereinafter, indicates alkali metal such as Na salt and Ca salt, alkaline earth metal), metal salt of fatty acid such as sodium oleate, metal salt of dialkylsulfosuccinic acid, metal salt of polycondensation of naphthalenesulfonic acid, alkylnaphthalene sulfone Acid metal salts, polycarboxylic acid metal salts, One or more kinds of surfactants such as polyoxyethylene alkyl phenyl ether sulfate salt and anionic surfactants such as anionic surfactants may be used according to the active ingredient and solvent to be used. However, the present invention is not limited to these.

As the solid carrier used for the solid preparation, of course, there are mineral carriers, inorganic salts or inorganic salts used in water-applied pesticide granules and powders, or granules obtained by processing them. , Vegetable carriers (sawdust, corncob, etc.),
It is not particularly limited as long as it retains oily substances that spread on the water surface, such as plastics, but substances that strongly adsorb active ingredients such as activated carbon and inhibit the development on the water surface, and because it is light like styrofoam, it has almost the entire volume. A synthetic resin foam or the like that is exposed to the surface of the water and floats and is extremely susceptible to the influence of the wind is not very preferable and is not practical. When the solid carrier to be used remains settled when treated with an aqueous system, the water-spreading oily substance to be retained therein must be adjusted to have a specific gravity of 1 or less. Further, when the solid carrier floats on the water surface, the specific gravity of the water surface-developing oily substance does not necessarily have to be 1 or less, but is preferably close to 1 or less. The packaging technology of the present invention is of a type in which solid contents settle on the bottom of the water, that is, the water-soluble film dissolves in water to settle the contents, and the contents settle on the soil surface. Particularly, a formulation in which one or less oily active ingredient floats on the surface of water and develops, and especially when the content is a surface-floating type granule disclosed in JP-B-63-30281 (hereinafter referred to as the surface-floating type granule). Suitable, in particular, when the water-floating type granules are used as the content, after being processed into a water system, it temporarily settles at the bottom of the water, but it does not remain in the treated place forever and eventually floats and spreads over the entire crop. It is most suitable because it has advantages such as less ubiquitous drug damage. The reason why the sedimentation type formulation is suitable for the present invention is that when the sedimentation type formulation is uniformly sprayed on the water system, since each grain of the formulation is in contact with the soil on the bottom of the water, a part of the active ingredient is adsorbed to the soil. On the other hand, when it is inactivated, when it is treated with water in the packaging, the area that contacts the soil is small, so there is little soil adsorption, and the amount of active ingredient that develops on the water surface without inactivation increases. The pest control activity is also improved. Among the types that settle at the bottom of the water, the water-floating granule of JP-B-63-30281 is specifically manufactured by the following methods (1) to (6). That is, a powder and particle nuclei of a water-soluble carrier {hereinafter referred to as (a)}, an air retention having a complete water dissolution rate slower than the water solubility of the water-soluble carrier (a speed at which water once forms a colloid but disappears after dissolution) Using a water-soluble inorganic or organic film-forming substance {hereinafter referred to as (b)}, water {hereinafter referred to as (c)} and a poorly water-soluble or water-insoluble active ingredient {hereinafter referred to as (d)} (1)
After kneading (a), (b), (c) and (d), it is formed into granules and dried to remove (c), or (2) (a),
After kneading (b) and (c), they are formed into granules and water (c)
(D) is retained in the granular material obtained by drying and removing, or (3) (a), (b), (c) and (d) are kneaded and dried, followed by crushing and sieving. To get granules,
(4) After kneading (a), (b) and (c) and drying,
Granules are obtained by crushing, sieving, etc., and (d) is retained in the granules, or the surface of the granule nuclei of the water-soluble carrier in (5) (a) is dissolved in water in (a) Coating with a mixture of the powder of the carrier and (d) and drying, or
(6) The particle nuclei of the water-soluble carrier of (a) are coated with the powder of the water-soluble carrier of (a) using the aqueous solution of (b), and the granules obtained by drying hold (d). .. The above (1)-
In the method of (4), when kneading with water (c) using (a), (b) and / or (d), it may be used as an aqueous solution prepared by previously dissolving (b) in water (c). Good.
Common to (1) to (6) are (a), (b),
That is, (c) and (d) are mixed to obtain granules, and finally water (c) is removed from the granules by drying. Then, during the above-mentioned mixing and when the water (c) is removed, air is taken into the granule, and this air is retained by the three-dimensional structure formed by mixing (b) with the carrier and water. To surface. The powder of the water-soluble carrier used for the surface-floating granules is specifically urea, ammonium sulfate, ammonium nitrate, ammonium chloride, potassium chloride, ammonium bicarbonate, sodium sulfate, sodium borate, sodium carbonate, sugars and the like. Powders may be used, and these may be used alone or in combination of two or more, and are not limited to these. Specific examples of the air-retaining organic or inorganic film substance (b) that can be used in this granule include gum arabic, xanthan gum, dextrin, Na salt of carboxymethyl cellulose, sodium alginate, modified starch, polyvinyl alcohol, sodium silicate. , Potassium silicate, sodium polyacrylate, etc., and these may be used alone or in combination of two or more kinds, but those having a complete water dissolution rate slower than that of the water-soluble carrier to be used are selected. Must be used. When the packaging body of the present invention in which the granules are packaged in a water-soluble film is thrown into a water system, the packaging body once sinks to the bottom of the water, and the film of the packaging material dissolves in water. The film-forming substance in the granule as the content is swollen or colloidal when it contains water, and captures fine air bubbles existing between particles such as the water-soluble carrier as the raw material. At the same time, the water-soluble carrier in the granule gradually elutes to the water side, and the granule becomes relatively lighter than water, so that it starts to float. The granules floating on the water surface release the water surface-developing oily substance containing the active ingredient to the water surface, and completely dissolve the solid matter, leaving only the oily substance on the water surface. In other words, how to capture the air present in the granules is important for imparting the floating property, and the film-forming substance (b) that becomes the trapping substance is important.
The amount used is 1 to 30% by weight, particularly preferably 1 to 10% by weight, based on the granules. In addition, the above-mentioned solvent or surfactant can be used for the present agent in order to have excellent water surface spreadability or to dissolve the active ingredient. The above-mentioned active ingredient used in the present preparation is 0.01 to the present granule.
It is 20% by weight, preferably 0.1 to 15% by weight. Further, water (c) is always required for the production of the present granule, and the amount thereof is 3 to 25% by weight, preferably 5 to 15% by weight, based on the present granule. On the other hand, it is not particularly difficult to produce the other type that is settled on the bottom of the water and fixed to the place where the carrier settles forever. It may be covered or held and made into a package with a water-soluble film described later. Although the sedimentation type formulation particularly suitable as the contents of the package of the present invention has been described above in detail, the agrochemical formulation used in the present invention is not limited to the above, and the active ingredient may be applied to the water surface. There is no particular limitation as long as it is a pesticide formulation to be developed.

The water-soluble film which can be used is dissolved in water,
Any film may be used as long as it has a certain level of strength and does not permeate or dissolve the water-swelling oily substance to be used, and it may be selected according to the properties of the water-swelling formulation to be contained, but generally polyvinyl alcohol , Carboxymethylcellulose, hydroxyethylcellulose, polyvinylpyrrolidone, polyacrylic acid and its salts, starch, gelatin and the like, and a film formed of one or more of them. Further, a fibrous film in which a water-soluble film-forming substance is incorporated into a material such as paper whose fibers are easily loosened by water is also a packaging material of the packaging body of the present invention. Furthermore, the thickness of the film is not particularly limited as long as it can be put to practical use depending on the type of the water-spreadable formulation and the material of the film, but for example, polyvinyl alcohol having good chemical resistance, strength, economy, etc. When it is used as a granular material or powder, it is preferably 5 μm or more, and particularly preferably 10 μm to 80 μm in terms of economy and strength. The weight of one package of the present invention is determined by the amount of input drug per unit area, but on the other hand, it needs to be designed within the range of the amount that can be easily thrown into a water system. That is, if it is too light or too heavy, it is difficult to throw it, and for example, several grams to 1 kg is suitable. Further, the shape of the package should be easy to throw, but at the same time, it is necessary to give importance to economical efficiency at the time of processing, and a cylindrical shape, a spherical shape, a rectangular bag shape or the like is preferable. However, the shape is not limited to these. Since the water-soluble film is vulnerable to moisture, it is better to pack one such package or a plurality of such packages in a moisture-proof packaging material. In use, determine the amount of drug to be treated per unit area according to the control effect of the active ingredient, and also determine the number of packages to be thrown in that amount according to the water surface spreading ability of the water surface spreading agent to be used. However, in the case of a preparation having a normal spreading property, 40 or less per 10 ares is sufficient, and within this range, it is possible to carry out spraying rather easily than usual spraying. The present invention also has a great advantage that the sprayer can cleanly treat the medicine from the ridge without touching the body directly with the medicine and without entering the paddy field. Furthermore, among the packages of the present invention, the type in which the content comes into contact with the soil at the bottom of the water when treated in paddy fields, the amount of active ingredient on the water surface spreads more than when the content is uniformly sprayed. It was confirmed that the number of pests increased and the pest control effect also tended to increase. As described above, the package of the present invention has many excellent points and has great utility value in the fields of agriculture and epidemics.

EXAMPLES Some examples and test examples are shown below, but the present invention is not limited to these. In addition, "part" shows a weight part and "%" shows a weight%. Example 1 4 parts of cycloprotoline 15 parts of diisodecyl adipate 1 part of Nucargen 3429PB (surfactant manufactured by Takemoto Yushi-Seiyaku Co., Ltd.) to obtain a 20% aqueous surface-developing oil preparation of cycloprotoline. 30 g of this was put in a 5 cm × 7 cm square bag made of 0.04 mm-thick Hi-Selon C-200 (polyvinyl alcohol film; manufactured by Nigo Film Co., Ltd.), heat-sealed, and 2 paddles of paddy field. A pesticide package of cycloprothrin for use was obtained.

Example 2 Diazinon 5.0 parts Nisseki Hysol 200 (petroleum solvent manufactured by Nippon Oil Co., Ltd.) 3.8 parts Polyoxyethylene (N = 3) stearyl ether 1.0 part Epoxidized soybean oil 0.2 parts Was dissolved to obtain a diazinon 50% water surface spreadable oily preparation. The thickness of 30 g is 0.04 mm as in Example 1.
It was put in a square bag of Hycelon C-200 and heat-sealed to obtain a diazinon insecticide package for 2 ars of paddy field.

Example 3 Xanthan gum 0.3 parts Sodium polyacrylate 1.0 parts Potassium chloride powder 100.0 parts were uniformly mixed, and 10 parts of water was added and kneaded to obtain a pore diameter of 0.
After granulating with an 8 mm screen extrusion granulator,
After drying and sieving, 12 to 32 mesh water surface floating type granules were obtained. 90 parts of this granular material was adsorbed with 10 parts of the water surface-developing oily preparation of Example 1 to obtain a water surface-developing granular preparation of 2% cycloprothrin (having water surface floatability).
0 g was placed in a 10 cm × 13 cm square bag made of 0.03 mm-thick High-Selon C-200, and heat-sealed to obtain a cycloprotoline insecticide package for 1-al paddy field. ..

Example 4 Clay powder 79.6 parts Kunibond (manufactured by Kunimine Industries Co., Ltd.) 15.0 parts Sodium lignin sulfonate 5.0 parts Sodium dodecylbenzene sulfonate 0.4 parts are uniformly mixed and 18 parts of water are added. In addition, kneading was performed to obtain a pore size of 0.
After granulating with an 8 mm screen extrusion granulator,
After drying and sieving, 12 to 32 mesh granules were obtained.
On 90 parts of this granular material, the water surface spreadable oil preparation 10 of Example 1
Part was adsorbed to obtain a water-spreadable granular preparation of 2% cycloprotrin, and 150 g of this was placed in a 10 cm × 10 cm square bag made of 0.03 mm-thick Hyselon C-200, and the heat seal was applied. Then, an insecticide package of cycloprothrin for paddy field 1 al was obtained.

Example 5 Clay powder 85 parts Carplex # 80 (manufactured by Shionogi Pharmaceutical Co., Ltd.) 15 parts were uniformly mixed, and 90 parts of this was mixed and ground with 10 parts of the water-spreading oily preparation of Example 2 to give diazinon. 5%
The water-spreading powdery preparation of
8cm x 15 made with 4mm Hi-Selon C-200
It was placed in a cm square bag and heat-sealed to obtain a diazinon insecticide package for 1-al paddy field.

Example 6 MCPB (30 parts) Diethylhexyl phthalate (70 parts) was dissolved to obtain a 30% water-spreading oily preparation of MCPB. 90 parts of the surface-floating type granular material of Example 3 was adsorbed to obtain 10 parts of the surface-expandable granular preparation containing 3% of MCPB, and 100 g of this preparation was used for Hyceron C-200 having a thickness of 0.04 mm.
Put it in a square bag of 8 cm x 12 cm created in step 1
Then, the herbicide package of MCPB of rice paddy was obtained.

Control Example 1 Clay powder 79.6 parts Kunibond (manufactured by Kunimine Industries Co., Ltd.) 15.0 parts Sodium lignin sulfonate 5.0 parts Sodium dodecylbenzene sulfonate 0.4 parts are uniformly mixed and 18 parts of water are added. In addition, kneading was performed to obtain a pore size of 0.
After granulating with an 8 mm screen extrusion granulator,
After drying and sieving, 12 to 32 mesh granules were obtained.
To 94 parts of this granular material, 6 parts of a 50% tricresyl phosphate oil solution of cycloprotrin was adsorbed to obtain a granular preparation of 3% cycloprotrin. This granular preparation remains settled when added to an aqueous system, and since the cycloprotoline oil solution has a specific gravity of more than 1, this granular preparation is a preparation having no water surface spreadability. Control Example 2 Example 3 was used as it is as a 2% granule without packaging.

[Test Example] Rice weevil control effect and water surface spreadability of the active ingredient Two packages of Example 1, Example 3, Example 4, and Control Example 1 were prepared.
It was put into a paddy field partitioned into ares (spreading by hand in a control example), and the amount of cycloprotoline on the water surface after 1 day was quantified.
In addition, the number of adult rice weevil adults was examined and the control effect was investigated. In addition, in the case of one package, it was placed at the center, and in the case of two packages, it was placed at two points sandwiching the center point. Comparative Example 2 is a comparative example with Example 3 regarding the treatment method for paddy fields. Efficacy test method of rice weevil: The number of adults of rice weevil, which inhabits 100 strains per 100 strains before and 1 day, 3 days and 7 days after the drug injection, was counted and the control effect was investigated.

Test method for water surface spreadability: Paper of 11 cm in diameter (95c) on the water surface at three points at four equidistant points on the diagonal of the paddy field.
m) was gently floated and the amount of cycloprothrin attached to the paper was extracted with acetone and analyzed by liquid chromatography. Test results

Efficacy test; Test group Amount Rice weevil Adult number / 100 strains Treatment amount (component amount) / 2a Before spraying 1 day 3 days 7 days Example 1 1 (6 g) 5600 0 Example 3 2 ( 6 g) 40 0 0 0 Example 3 1 piece (3 g) 45 0 2 6 Example 4 2 pieces (6 g) 61 1 2 5 Control Example 1 200 g (6 g) 35 20 31 31 29 Control Example 2 300 g (6 g) 43 1 3 7 Control Example 2 150 g (3 g) 42 3 6 9 Non-spray-55 65 61 61 47

Water Surface Spreadability: Test Area Treated Amount (Component Amount) / 2a Water Surface Spread Volume (μg / 95 cm ² ) 1 2 3 Average Example 1 1 (6 g) 247 253 221 240 Example 3 2 (6 g) 211 223 208 208 Example 3 1 piece (3 g) 102 95 93 97 Example 4 2 pieces (6 g) 112 133 105 105 117 Control Example 1 200 g (6 g) 6 6 5 6 Control Example 2 300 g (6 g) 102 85 97 95 Control Example 2 150 g (3 g) 63 71 49 61

[0025]

INDUSTRIAL APPLICABILITY According to the present invention, the efficacy against adult rice weevil adults may be higher than that of the control example in any of the examples, and the amount of water surface development is large, and particularly in Examples 1 and 3, it is more remarkable. And it was scattered all over the water surface. The difference between the throwing treatment and the normal spraying of the package of the sedimentation type formulation to which the present invention is particularly suitable is based on the comparison between Example 3 and Control Example 2, but the package of the present invention (Example 3) is sprayed ( The amount developed on the water surface was larger than that in Control Example 2), and the efficacy against rice weevil tended to be superior. Regarding the treatment of paddy fields, the package of the present invention does not need to enter the paddy fields and be sprayed over time unlike the control example, and can be easily and cleanly handled without directly touching the drug. It was

Claims (5)

[Claims] 1. A water-spreadable agricultural chemical formulation package which is packaged with a water-soluble film. 2. A simple method for spraying agricultural chemicals, which comprises throwing the package of claim 1 into a water system to diffuse the active ingredient on the water surface. 3. The package according to claim 1, wherein the water-spreading pesticide formulation is solid. 4. The water-spreading pesticide formulation is oily.
Packaging 5. The package according to claim 3, wherein the solid, water-spreading pesticide formulation is a surface-floating pesticide granule formulation.