JPH10167901A - Bottle containing agrochemical for paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bottle containing agrochemicals for a paddy field, without requiring a special tool for dispersing, capable of allowing a disperser to perform the treatment without entering the paddy field and safe to the disperser and the environment by packing an agrochemical solid preparation for the paddy field into a specific water-soluble vessel. SOLUTION: This bottle containing agrochemicals for a paddy field is obtained by packing (B) an agrochemical solid preparation for the paddy field into (A) a water-soluble vessel having 0.1-5.0mm thickness. Preferably, the component A is a vessel having a function capable of collapsing and dispersing the component B in the interior of the vessel, and the component B is a wettable powder or a granular preparation dispersable in water, especially a granular preparation having >=20 number of inverted times of collapsibility in the water at 25 deg.C. The amount of the component B for treating 10 are is preferably 10-500g, and at least one kind of the agrochemical active ingredients is preferably sulfonylurea based herbicide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle containing a pesticide for a paddy field having a water surface floating property and a method of directly throwing the bottle into a flooded sewage paddy for spraying. That is, according to the present invention, the chemical treatment can be easily performed without using a sprayer by throwing a padded agricultural chemical solid preparation into a water-soluble container into an aqueous system that needs to control pests such as paddy fields. Moreover, a suspension is formed in the water-soluble container after the water naturally enters the container. afterwards,
TECHNICAL FIELD The present invention relates to a technique capable of spreading a suspension over an entire surface of a paddy field or the like because the suspension is spread or dispersed in water, emulsified in water or dissolved in water.

[0002] It is also a great advantage that the sprayer can clean and safely treat the medicine from the ridge without entering the paddy field without touching the medicine directly to the body, and the utility value in the field of medicine and epidemics is great.

[0003]

2. Description of the Related Art Up to now, paddy agricultural chemicals have been formulated in various dosage forms, for example, powders, wettable powders, emulsions, granules, etc. for convenience of use, and sprayed and applied to the water surface or rice body. Have been.
However, powders and wettable powders have problems of health of users and producers due to dusting and problems of environmental pollution, and emulsions have problems of toxicity of organic solvents and fire. Granules have few such problems, but they are not only disadvantageous in terms of logistics and economics, but also express their efficacy only after the active ingredient is dissolved in water and absorbed from the roots or stems into plants. Therefore, in the case of a compound that is hardly soluble in water, a compound that is easily adsorbed on soil, or a compound that has no property of osmotic transfer, a sufficient control activity may not be obtained as compared with other dosage forms. Many.

[0004] Under these circumstances, a new dosage form called dry flowable (hereinafter abbreviated as DF) has been developed. DF is diluted in water and used as an aqueous solution, suspension or emulsion, and can be said to be a dosage form that solves the above-mentioned problems of wettable powders in that it has no powder and has fluidity. However, in order to spray these preparations, of course, even in the conventional dosage form or DF, it is necessary to first dissolve or disperse the preparation in water to prepare a spray liquid, and further spray the spray. Spraying the liquid often requires the use of a spraying device. Also, in order to spread the active ingredient evenly over the entire paddy field, it is necessary for the sprayer to enter the paddy field during spraying.

[0005] As described above, preparing a container and a spraying device for preparing a spraying liquid, and further spraying in a paddy field is not only economically burdensome and uneasy about safety but also labor-intensive. This burden is unbearable, especially for small part-time farmers and for those who rely more on the elderly and women. Recently, a technique related to a paddy field herbicide obtained by adding a surfactant and a foaming agent to an active ingredient (JP-A-3-128301) has been disclosed. These techniques have the advantage that paddy field herbicides can be easily treated. However, when these solid preparations are thrown into water, the preparations settle on the soil surface, where they foam and disperse the active ingredient in the paddy water, so that the insoluble original particles settle around the dropping point. The dissolved active ingredient also forms a highly concentrated solution near the surface of the soil near the point of release.

Therefore, the active ingredient is easily adsorbed on the soil,
In addition, even if the active ingredient has a very high water solubility, the concentration in the water increases near the dropping point, and depending on the field conditions, weather conditions, etc., the unevenness of the active ingredient tends to cause harm or insufficient efficacy due to non-uniformity of the active ingredient. is there.

[0007]

As described above, (1) no special equipment is required for spraying (2) processing is possible even if the sprayer does not enter the paddy field (3) safety for the sprayer and the environment (4) It is easy or unnecessary to treat the container containing the pesticide formulation. (5) There is a need for a pesticide formulation for paddy fields that satisfies the lack of efficacy and the risk of harm due to segregation of active ingredients, and a method for treating the same.

[0008]

In view of such circumstances, the present inventors have conducted intensive studies with the aim of developing a formulation and a treatment method satisfying the above conditions. As a result, the above conditions (1), (2), (3), and (4) should be satisfied by packaging the solid agricultural chemical for paddy fields in a water-soluble container.
After the package is put into a paddy field, water naturally infiltrates and a suspension is formed in the container. The container satisfies the above condition (5) by dissolving while floating on the water surface and dispersing the suspension in water. That is, the present inventors have found that local uneven distribution of the active ingredient can be prevented, and that there is much less concern such as phytotoxicity and fluctuation of biological effects, and the present invention has been completed.

That is, according to the present invention, the thickness is 0.1 to 5.0.
The present invention relates to a water-floatable paddy-field-containing pesticide-containing bottle obtained by filling a paddy-field agrochemical solid preparation in a water-soluble container having a thickness of 1 mm, and a method of directly throwing the bottle into a flooded sewage paddy and spraying the same. When the paddy pesticide-containing bottle having paddy field pesticide, which is made by filling the paddy pesticide solid formulation into a water-soluble container, is applied to the surface of the water, water naturally infiltrates into the water-soluble container, and the suspension of the paddy pesticide solid formulation is suspended. Is formed. The water-soluble container is dissolved while floating on the water surface, and the suspension is dispersed in water.

There are no particular restrictions on the pesticidal active ingredients that can be used in the present invention, as long as they are used in paddy fields as pesticides such as insecticides, fungicides, herbicides and plant growth regulators.
When the active ingredient is an insecticide or fungicide, it is preferable that it has the property of being absorbed and transferred to the rice body, but even if it does not have systemicity, it will be infected by water or insects that live in the water surface or from the water or water surface. It is effective against bacteria.

Suitable insecticides include isoxathion,
Propaphos, DEP, diazinon, ethylthiomethone, formotion, dimethoate, monocrotophos,
Systemic insecticides such as acephate, carbosulfan, thiocyclam, cartap, benfracarb, furatiocarb, carbaryl, buprofezin, BPMC, PHC, imidacloprid, TI304, fipronil, etc., cycloprothrin, etofenprox etc. Synthetic pyrethroids effective against pests that live in water or near the water surface can be mentioned.

Preferred fungicides include probenazole,
Examples include blast agents such as isoprothiolane, IBP, tricyclazole, and pyroquilon; swelling agents such as flutranyl, mepronil, thiflusamide, and S658; and teclophthalam.

Suitable herbicides include halosulfuron-methyl, pyrazolate, pentoxazone, benzofenap, pyrazoxifene, pyributicarb, promobutide, mefenacet, bensulfuron-methyl, butachlor, pretilachlor, benthiocarb, CNP, chloromethoxynil, dimuron, bifenox, naproanilide, Bentazone, Molinate, Piperophos, Dimepiperate, Esprocarb, Dithiopyr, Imazosulfuron, Benfresate, ACN, Simmesulin, Azimsulfuron, Ethoxysulfuron, Cyclosulfamuron, MCPB, Pyrazosulfuronethyl, 1- (2-
Chlorobenzyl) -3- (γ, α-dimethyl bembell)
Paddy field herbicides such as urea (JC940), kafenstrol, tenylchlor, MY-100, and MK-243.

Suitable plant growth regulators include inabenfide, paclobutrazol, uniconazole, tripentenol and the like. In the composition of the present invention, the pesticidal active ingredients can be used alone or as a mixture of two or more kinds. When used for mixing, the mixing ratio can be arbitrarily selected.

As the surfactant used in the composition of the present invention, those capable of emulsifying and dispersing an agricultural chemical active ingredient and the like are used. For example, alkylaryl sulfonate, alkylnaphthalene sulfonate, lignin sulfonate, dialkyl Anionic surfactants such as sulfosuccinates, polyoxyethylene alkyl aryl ether sulfates, alkali metal salts of copolymers having a carboxyl group, and fatty acid salts, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ether, poly Nonionic surfactants such as oxyethylene styryl phenyl ether, polyoxyethylene alkyl ester, sorbitan alkyl ester, and polyoxyethylene sorbitan alkyl ester can be exemplified. Further, a cationic surfactant, an amphoteric surfactant or the like may be used as necessary. These surfactants may be used alone or as a mixture of two or more. The amount of the surfactant used is usually 0.1 to 30% by weight, preferably 1 to 20% by weight based on the total weight of the composition of the present invention.
It is.

The extender used in the present invention includes, in addition to mineral powders generally used as carriers for agricultural chemicals, such as bentonite, talc, clay, diatomaceous earth, amorphous silicon dioxide, calcium carbonate, magnesium carbonate, etc. Sugars such as glucose, sugar and lactose, carboxymethylcellulose and its salts, starch and its derivatives, crystalline cellulose, organic substances such as wood powder, water-soluble inorganic salts such as sodium sulfate, ammonium sulfate and potassium chloride, urea and the like can be mentioned. . These extenders are properly used depending on the purpose.

The material of the water-soluble container used in the present invention may be selected according to the properties of the solid pesticide formulation which is dissolved in water and has a certain strength, and is generally polyvinyl alcohol. , Carboxymethyl cellulose,
It is selected from those molded with one or more of hydroxyethylcellulose, polyvinylpyrrolidone and the like. Specifically, Sorbin (manufactured by Aicello Chemical Co., Ltd.)
And the like.

The shape of the water-soluble container is a sphere, a cylinder, a rectangular parallelepiped,
Cube, egg, almond, trap, donut,
Any shape such as a bell shape may be used. The thickness of the water-soluble container is usually
0.1 to 5.0 mm, preferably 0.3 to 2.0
mm. When the thickness of the water-soluble container is 0.1 mm or less, when the water-soluble container is dropped below the surface of the water, the container itself dissolves quickly and without forming a sufficient suspension in the container,
The container melts, causing uneven spraying, which is insufficient in terms of effects and phytotoxicity. On the other hand, when the thickness of the water-soluble container is 0.5 mm or more, when the water-soluble container is dropped below the surface of the water, the dissolution of the container itself is slowed down, wind blows, etc., and the effect and phytotoxicity are insufficient. is there. Also, a hole may be formed in the container. The size of the holes can be any size as long as the granular formulation contained therein does not spill. The number of holes may be two or several on the side.

The weight of the container is not particularly limited, but is preferably about 10 to 200 g per piece, and more preferably about 20 to 120 g. The weight of one package wrapped is about 30 to 130 g most easily thrown. With this weight, children, women and the elderly can easily reach 15m
It can be thrown to a target point within a certain degree. If it is heavier than this, it will be painful to throw it in and it will not be easy to handle large areas. Further, below this, the vehicle does not reach the target location due to the influence of the wind. Regarding the underwater disintegration of the granular preparation for paddy field of the present invention, 10 g of the pesticidal granular preparation was added to a measuring cylinder containing 100 ml of 3 degree hard water at 25 ° C., and then the cylinder was repeatedly inverted to a fineness of 90% or more. It is defined by the minimum number of inversions.

(Method of measuring disintegration in water)
The 100 ml female cylinder with a stopper was placed in a thermostatic water bath, and the water temperature was adjusted to 25 ° C. 10 g of the granular preparation was placed in the cylinder, stoppered, and the cylinder was repeatedly inverted once every 2 seconds. After inversion, measure the fineness,
The number of inversions at which the fineness was 90% or more for the first time was defined as disintegration in water. The number of inverted cylinders was set to a maximum of 20 times. The fineness is measured and defined as follows. The suspension in the measuring cylinder, which had been repeatedly inverted, was passed through a 106-micron sieve, the residue on the sieve and the residue in the cylinder were dried and collected, and the ratio of the residue passing through the sieve was calculated from the weight of the residue. To a fineness.

Fineness = {1- (weight of residue on sieve + weight of residue in cylinder) / weight of granule} x100 Examples relating to the present invention will be described, but the description does not limit the present invention in any way. . All parts represent parts by weight.

Example 1 Pyrazosulfuron-ethyl
5 parts, sodium lignin sulfonate 5 parts, naphthalene sulfonic acid formalin condensate 10 parts, polyoxyethylene alkyl phenyl ether sulfate 2 parts, ammonium sulfate 25 parts, kaolin clay 54.5 parts were mixed,
It was pulverized with a single track mill (Seisin Corporation). Next, a predetermined amount of granulation water is added, and a universal mixer (Co., Ltd.)
(Dalton) and granulated with a basket-luser (BR-200, manufactured by Fuji Paudal) equipped with a 0.5 m / m screen, and dried at 50 ° C. for 2 hours to obtain a granular preparation. 6 g of this granular preparation was placed in a water-soluble container having an inner volume of 100 ml [Sorbin (a product of Icelo Chemical Co., Ltd.), shape:
Column shape, height: 10cm, bottom area: 15.9cm ² , thickness: 0.85c
m, weight: 30.6 g], and a lid was obtained to obtain a pesticide bottle for paddy fields of the present invention. Following the above water-soluble container,
It is called container A. The disintegration in water of the above granular preparation is 4
And the fineness after four rotations was 95%.

Example 2 6 g of the granular preparation obtained in Example 1 was placed in a container having four holes of 0.1 mm in diameter at a height of 4.5 cm in container A so as to be equidistant from each other ( Hereinafter, container B
That. ), And covered with a lid to obtain a pesticide bottle for paddy fields of the present invention.

Example 3 Pyrazosulfuron-ethyl
5 parts, Kafentrol 50 parts, sodium ligninsulfonic acid 7 parts, naphthalenesulfonic acid formalin condensate 4
Part, butylnaphthalenesulfonic acid formalin condensate 6
Parts, 2 parts of polyoxyethylene alkyl phenyl ether sulfate and 27.5 parts of ammonium sulfate were mixed and pulverized with a single track mill (Seisin Corporation). Next, a predetermined amount of granulation water was added, the mixture was kneaded with a universal mixer (Dalton Co., Ltd.), and granulated with a basket-luzer (BR-200, manufactured by Fuji Paudal) equipped with a 0.5 m / m screen. Thereafter, the resultant was dried at 50 ° C. for 2 hours to obtain a granular preparation. 6 g of this granular preparation was filled in Container A and capped to obtain a pesticide bottle for paddy fields of the present invention having a water-floating surface. In addition, the disintegration property of this granular preparation in water was 3 times,
The fineness after rotation was 96%.

(Example 4) 6 g of the granular preparation obtained in Example 2 was filled in a container B, and a lid was obtained to obtain a pesticide bottle for water-floating rice fields according to the present invention. Example 5 3.2 parts of pyrazosulfuron-ethyl, 50 parts of pentoxazone, 5 parts of sodium ligninsulfonate, 10 parts of formalin condensate of naphthalenesulfonic acid, polyoxyethylene alkyl phenyl ether sulfate 2
, 20 parts of ammonium sulfate and 9.8 parts of kaolin clay were mixed and pulverized with a single truck mill (Seisin Corporation). Next, a predetermined amount of granulation water was added, and the mixture was kneaded with a universal mixer (Dalton Co., Ltd.), and a basket mixer (BR-200) equipped with a 0.5 m / m screen.
After granulation with Fuji Paudal Co., Ltd.), the mixture was dried at 50 ° C. for 2 hours to obtain a granular preparation. 6.6 g of this granular preparation was placed in container A
And a lid was obtained to obtain a pesticide bottle for paddy fields of the present invention. In addition, the disintegration property in water of this granular preparation was 3 times, and the fineness after 3 inversions was 92%.

Example 6 Pyrazosulfuron-ethyl
25 parts, MK-243 (test number) 37.5 parts, sodium ligninsulfonate 5 parts, naphthalenesulfonic acid formalin condensate 10 parts, polyoxyethylene alkyl phenyl ether sulfate 2 parts, ammonium sulfate 20
And 20.25 parts of kaolin clay were mixed and pulverized with a single truck mill (Seishin K.K.). Next, a predetermined amount of granulation water is added, and a universal mixer (Dalton Co., Ltd.)
, And granulated with a basketluser (BR-200 manufactured by Fuji Paudal) equipped with a 0.5 m / m screen, and dried at 50 ° C for 2 hours to obtain a granular preparation.
4 g of the granular preparation was filled in Container A and capped to obtain a pesticide bottle for paddy rice fields of the present invention. The disintegration property in water of this granular preparation is 4 times, and the fineness after 4 inversions is 93%.
Met.

Example 7 Pyrazosulfuron-ethyl
5 parts, 5 parts of sodium ligninsulfonate, 4 parts of polyoxyethylene alkylaryl ether sulfate and 87.5 of kaolin clay were mixed and pulverized with a single track mill (Seishin Co., Ltd.) to obtain a wettable powder. 6 g of this wettable powder was filled in the container A, and the container was capped to obtain a water-floating paddy agricultural chemical bottle of the present invention.

(Comparative Example 1) 6 g of the granular preparation obtained in Example 1 was prepared using a water-soluble vinylon film VF-HH4000 (thickness: 40 μm / manufactured by Kuraray Co., Ltd.).
cm square bag.

(Test Example 1) A paddy was planted in a 10-m paddy field of 25 m x 40 m, and seedlings of paddy rice (variety: Nipponbare) were transplanted with a rice transplanter. Seven days after transplantation, the bottles of the present invention and the sack obtained in the comparative example were treated at 10 points as shown in FIG. The depth of paddy water during treatment is about 4c
m. In the treatment method, one bottle and a square bag were treated at one point, and 10 bottles and a square bag were treated per 10 ares.

On the 30th day after the treatment of the bottle of the present invention and the sack of the comparative example, the herbicidal effect on various weeds and the investigation of the phytotoxicity on rice were evaluated according to the following criteria. Criterion 5: Complete withering or suppression of 90% or more 4: Suppression of 70 to 90% 3: Suppression of 40 to 70% 2: Suppression of 20 to 40% 1: Suppression of 5 to 20% 0: Suppression of 5% or less Suppression The degree of suppression was determined by visual observation.

As shown in FIG. 1, the survey site is located in a paddy field.
Two points were provided, and a circle having a radius of 50 cm or less centered on each point was defined as the investigation range. The average value (rounded to the nearest whole number) of the criteria for judging the herbicidal effect on various weeds and the phytotoxicity on rice in each survey area was determined.

In FIG. 1, the distance between the ridge and the processing point closest to the ridge and the distance between the processing points are set to be the same in the vertical and horizontal directions of the paddy field, and are set in the vertical direction (40
m) is 6.7 m, and the lateral direction (25 m) is 8.3 m.
The results are shown in Table 1. The symbols in Table 1 represent the following meanings. A: Paddy rice, B: Nobie, C: Firefly, D: Konagi,
E: Water mistletoe

[0033]

[0034]

EFFECTS OF THE INVENTION The use of the pesticide bottle for water-floating paddy fields of the present invention requires (1) no special equipment for spraying, and (2) processing without the need for the sprayer to enter the paddy field. (3) safe for the sprayer and the environment; (4)
No need to treat containers containing pesticide preparations, (5)
It satisfies that there is no insufficient drug effect and no risk of drug damage due to segregation of the active ingredient.

[Brief description of the drawings]

FIG. 1 is a plan view of a paddy field, showing 10 scatter locations (5) and 12 survey points (6) in a paddy field (1).
And how the survey area (7) is arranged. Paddy field (1)
Is a part of a straight ridge (4) with a water mouth (2) and a water butt (3)
Has been suspended by

[Explanation of symbols]

1 paddy field, 2 water port, 3 water butt, 4 ridge bank, 5
──Spray location, 6── survey point, 7── survey area.

Claims (10)

[Claims] 1. A water-floatable paddy-field-containing agricultural chemical bottle comprising a water-soluble container having a thickness of 0.1 to 5.0 mm filled with a solid agricultural chemical for paddy field. 2. The bottle containing a pesticide for paddy field according to claim 1, wherein the water-soluble container is a container having a function of disintegrating and dispersing the solid preparation for paddy field pesticide in water inside the container. 3. The thickness of the water-soluble container is 0.3 to 2.0 m.
The bottle containing the agricultural chemical for paddy field according to claim 1 or 2, which is m. 4. The bottle containing an agricultural chemical for paddy fields according to claim 1, wherein the solid agricultural chemical for paddy fields is a wettable powder or a granular preparation that can be suspended in water. 5. The bottle containing an agricultural chemical for a paddy field according to claim 1, wherein the solid agricultural chemical for a paddy field is a granular preparation having a disintegration property in water at 25 ° C. of not more than 20 times. 6. The bottle containing an agricultural chemical for a paddy field according to claim 1, wherein the solid agricultural chemical for a paddy field is a granular preparation having a disintegration property at 25 ° C. in water of 10 or less inversions. 7. The bottle containing an agricultural chemical for paddy fields according to claim 1, wherein the treatment amount per 10 ares of the solid preparation for agricultural chemicals for paddy fields is 10 to 500 g. 8. The bottle containing a pesticide for a paddy field according to claim 1, wherein at least one of the pesticide active ingredients is a herbicide. 9. The paddy-field-containing pesticide according to claim 1, wherein at least one of the pesticidal active ingredients is a sulfonylurea herbicide. 10. A method of directly throwing the bottle containing the agricultural chemical for paddy field according to claim 1 to 9 into a flooded sewage paddy.