JP2001114605A - Agrochemical solid preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the uniform scattering properties of granular agrochemical solid preparation of a low dosage type. SOLUTION: The objective low-dose scattering type granular agrochemical solid preparation characteristically has an apparent specific gravity of 0.3-0.8 and the particle sizes of 0.8-5.0 mm. In comparison with the conventional low- dose scattering type granular agrochemical solid preparation, the time for scattering a unit area and the distance for scattering can be sufficiently secured to facilitate the uniform scattering. In the comparison with the conventional solid preparation, an equivalent scattering time can be attained with a reduced amount of the preparation and the labor power can be saved in comparison with the conventional granules.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a low-dose granular solid pesticide preparation having good uniform sprayability.

[0002]

2. Description of the Related Art Conventionally, granular pesticide solid preparations such as granules
3-4kg was sprayed per a. In recent years, so-called "1kg granules" designed to spray 1kg per 10a have been developed for the purpose of reducing spraying labor, reducing materials such as raw materials and packaging materials, and reducing transportation and storage management costs. It has been put to practical use. However, since the amount of such a preparation to be sprayed is small, it is difficult to control the time required for spraying and to spray uniformly. For example, the conventional 1 kg granules have a disadvantage that the time required for spraying per unit area is shorter than that of 3 to 4 kg granules, so that the sprayer becomes empty during the spraying and, as a result, the spraying cannot be performed uniformly. Was. 1k
One of the reasons why the shipment volume of the conventional 3kg / 10a spray formulation began to increase again, as the shipment volume of g granules turned to decrease and the emergence of 1kg granules, was attributed to the uneven distribution in such applications. There may be a problem with gender. "500g granules" and "250g granules", which are even less sprayed than 1kg granules, are being studied. However, when these formulations are sprayed with a spraying machine, they can be spread per unit area compared to conventional 1kg granules. Is even shorter, and uniform spraying by a sprayer becomes more difficult. Therefore, by applying these preparations with a self-diffusion ability, manual spraying from a ridge without using a sprayer is being studied as a spraying method. However, it is easily affected by obstacles on the water surface and blowing by the wind, and spraying by a sprayer has been desired in order to avoid these obstacles. Also, in these low-dose formulations, the active ingredient content per 10a does not change even if the dose is reduced, so that the active ingredient content is greatly increased. The specific gravity of the active ingredient, which is an organic powder, is very low as compared with clay, calcium carbonate, talc, and the like, which are extenders generally used in agricultural chemical formulations. Therefore, the apparent specific gravity of these low-dose preparations is often lighter than that of the conventional 3 kg / 10a preparation. For this reason, spraying of these low-dose preparations with a sprayer has a short flight distance and is an obstacle to uniform spraying.

[0003]

The problem to be solved by the present invention is to improve the uniform sprayability of a low-dose granular solid pesticide for spraying.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above situation, and have found that a formulation having an apparent specific gravity of 0.3 to 0.8 and a particle diameter of 0.8 to 5.0 mm is obtained by using a low specific gravity extender. As a result, the present inventors have found that a low-dose granular solid pesticidal formulation having a large bulk with respect to weight and capable of sufficiently securing a spraying time required for spraying per unit area can be obtained. Based on this finding, the present inventors have further studied and completed the present invention.

That is, the present invention provides [1] an apparent specific gravity of 0.
A low-dose granular solid pesticide formulation for spraying, characterized by having a particle size of 3 to 0.8 and a particle size of 0.8 to 5.0 mm; [2] the pesticide active ingredient and a low specific gravity extender [1].
[3] The pesticidal solid preparation according to [1], which is a granule having a particle diameter of 0.8 to 1.7 mm, [4] the low specific gravity extender is an inorganic powder, a synthetic resin powder, or a natural resin. The solid pesticide preparation according to the above [2], which is at least one selected from powder and plant fine powder; [5] The solid pesticide preparation according to the above [1], which is applied in an amount of 200 g to 2 kg per 10a of paddy fields; ] The present invention relates to a method of spraying the solid pesticide preparation according to any one of the above items [1] to [5] on a flooded paddy field with a spraying device.

"Apparent specific gravity" as defined in the present invention
Means a measured value obtained by a method according to the official pesticide inspection method. The method based on the official pesticide inspection method is 50 mm inner diameter
Place a standard sieve with a mesh size of 2000 μm on a metal cylindrical container with a capacity of 100 mL (the distance between the sieve mesh and the upper edge of the container is 20 cm), put the sample into it, and gently scrape it off with a brush. Meet. Immediately, the excess is ground using a slide glass and weighed to determine the weight (Ag) of the content, and the apparent specific gravity is calculated by the following equation. Formula for calculating apparent specific gravity: Apparent specific gravity = A / 100

The "particle size" defined in the present invention indicates a parameter obtained by the sieve opening. For example, in the case of "particles having a particle size of 0.8 mm to 5.0 mm", the particles pass through the sieve having the opening of 5.0 mm. And particles that do not pass through a sieve with an opening of 0.8 mm. The “low dose” defined in the present invention means that the applied amount of the solid pesticide formulation is about 200 g to 2 kg per paddy field 10a.

[0008] The dosage form of the preparation of the present invention is a granular solid preparation such as granules and wettable powder, and granules are particularly preferred. The particle size of the solid pesticide formulation is 0.8 to 5.0 mm (preferably 0.8 to 1.7 mm)
By doing so, it becomes possible to obtain a sufficient spraying distance when the formulation is sprayed. (The spray distance means the flight distance when the pesticidal solid preparation is sprayed, and may be referred to as a reach distance or a spray width.)

[0009] The method of spraying may be the same as that of a normal granular pesticide solid preparation (eg, granules). For example, spraying with a sprayer, spraying with a manual or motor-type granulator, and levee. Spraying by hand, water mouth application, aerial spraying by radio control or manned helicopter, radio controlled motorboat spraying, simultaneous rice planting spraying, soil spraying, foliage spraying, nursery box spraying, lateral strip application, seed treatment and the like. In particular, it is preferable to spray on flooded sewage fields with a spraying device. The spraying device refers to, but is not limited to, a spraying device powered by a power type, a manual type or a motor type.

The amount of the solid pesticide preparation of the present invention varies depending on the kind and content of the pesticidally active ingredient contained therein, the place of application, etc., but usually about 200 g to about 2 kg per 10 ares of paddy fields.
Preferably about 500 g to about 1 kg. The amount of the pesticide active ingredient used is about 2 g to about 1 k per 10 ares of the paddy field.
g, preferably about 4 g to about 600 g.

As the low-specific-gravity extender used in the present invention, an organic or inorganic water-insoluble powder can be used as long as it can float in water. For example, those having a true specific gravity of 1.0 or less include, but are not limited to, synthetic resin powders such as polyethylene powder, polystyrene powder, urea resin powder, plastic hollow bodies, rice wax, and carnauba wax. It is not something to be done. In addition, although the true specific gravity is 1.0 or more, diatomaceous earth,
Perlite, crushed inorganic powder such as shirasu balloon, wood flour, grass powder, firgrass, corn wick,
Examples include, but are not limited to, vegetable fine powder such as cellulose powder. Also, if necessary, 2
It is also possible to mix more than one type (preferably, two or three types). In particular, a plastic hollow body is preferable. The plastic hollow body used in the present invention is a hollow body obtained by foaming a resin. Examples of the resin include an acrylonitrile copolymer resin and an acrylonitrile-vinyl chloride copolymer resin. The addition rate of the low specific gravity extender is generally about 0.2 to 90% by weight based on the whole preparation, but specifically, the addition rate depends on the true specific gravity of the low specific gravity extender. Is appropriately adjusted depending on the type of the low specific gravity extender so that the apparent specific gravity becomes 0.3 to 0.8.

In addition to the above-mentioned low specific gravity extenders, extenders generally used for agricultural chemicals can be used in combination within a range where the apparent specific gravity of the preparation is 0.3 to 0.8. As such a bulking agent, any of water-soluble and water-insoluble agents can be used. For example, water-soluble fertilizers such as urea, ammonium sulfate, ammonium chloride and potassium chloride, soluble sugars such as lactose and glucose, inorganic salts such as calcium carbonate and sodium bicarbonate, bentonite, siegrite, talc, acid clay, diatomaceous earth, clay , Alumina, white carbon and the like, but not limited thereto. If necessary, two or more types (preferably, two
~ 3 types) can be mixed.

As the pesticidal active ingredient used in the present invention, any one can be used as long as it is generally used as a pesticide. Examples thereof include herbicides, insecticides, fungicides, and miticides described below. Agents (eg, chlorbenzilate), plant growth regulators (eg, paclobutrazol), nematicides (eg, benomyl), attractants (eg, eugenol), repellents (eg, Cleo) Sort) is used. In particular, herbicides, insecticides, and fungicides that are effective in water application are preferably used. The above-mentioned pesticidal active ingredients can be used alone or as a mixture of two or more (preferably 2 to 5). Herbicides, insecticides, and fungicides further include synergists (eg, piperonyl butoxide), pigments (eg, Food Blue No. 1),
A fertilizer (eg, urea) may be appropriately mixed. Here, “water surface application” means to be put on a water surface such as a paddy field, and the place where the pesticidal active ingredient shows its activity is not limited to the water surface. As the herbicides effective in the present invention, for example, the following (i) to (xii) are used. (i) phenoxy herbicides such as 2,4-D, MCP
A, MCPCA, MCPB, chlomepro
p), naproanilide and the like. (ii) diphenyl ether herbicides, for example, chlornitrofen, chloromethoxynil (chlome
thoxynil), bifenox, cyhalofop-butyl and the like. (iii) carbamate herbicides, for example, swe
p), thiobencarb, esprocarb (es
procarb), molinate, dimepiperate (dim
epiperate) and pyributicarb. (iv) acid amide herbicides such as propani
l), butachlor, pretilachlor (pret
ilachlor), bromobutide, mefenacet, etobenzanid, tenylchlor, and the like. (v) Urea herbicides, for example, dimron. (vi) sulfonylurea herbicides, for example, bensulfuron-methyl, imazosulfuron (im
azosulfuron), sulfosulfuron, pyrazosulfuron-ethyl, cinosulfuron, azimsulfuron (azimsul
furon), cyclosulfamuron,
Ethoxysulfuron and the like. (vii) triazine herbicides, for example, simetrine (sime
tryn), prometryn (prometryn), dimethamethrin (dim
ethametryn). (viii) diazine herbicides such as bentazone (ben
tazone). (ix) diazole herbicides, for example, oxadiazone
(oxadiazon), pyrazolate (pyrazolate), pyrazoxyfen (pyrazoxyfen), benzofenap (benzofenap)
Such. (x) dinitroaniline herbicides, such as trifluralin. (xi) Fatty acid-based herbicides, for example, dalapon. (xii) organophosphorus herbicides such as piperophos (piperophos)
phos). (xiii) a nitrile herbicide such as chlorthiamide (c
hlorthiamid). (xiv) other herbicides, for example,
Dithiopyr, pentoxazon
e), cafenstrole, fentrazamide, NOJ100 (Novatis Agro)
Co., Ltd., test number), benzobiyclon,
Oxaziclomefone and the like. Examples of the insecticide effective in the present invention include, for example,
As (i) to (iv) and the bactericide, for example, (v) to (xiii) are used. (i) organophosphorus insecticides such as fenthione
on), fenitrothion, pirimiphos-methyl, diazinon,
Quinalphos, isoxathione
n), pyridaphenthion, chlorpyrifos-methyl, vamidthione (v
amidothion), malathion, fentate
(phenthoate), dimethoate, disulfoton, monocrotophos,
Tetrachlorvinphos, chlorfenvinphos, propaphos
s), acephate, salithione
n), trichlorphon, EPN, pyraclophos, etc. (ii) carbamate insecticides such as carbaryl (car
baryl), metolcarb, isoprocarb (is
oprocarb) (MIPC), BPMC, propoxur (prop)
oxur), xylylcarb, XMC, carbosulfan, benfuracar
b), methomil, thiodicarb and the like. (iii) synthetic pyrethroid insecticides such as cycloprothrin, etofenprox (et
hofenprox). (iv) other insecticides, for example, cartap,
Thiocyclam, bensultap
p), buprofezin, carbofuran (carbo
furan, furathiocarb, cyanofenphos, nitenpyram, clothianidin and the like. (v) Polyhaloalkylthio fungicides, such as captan. (vi) Organochlorine germicides such as TPN, fusalide
(fthalide), monguard, etc. (vii) Organophosphorus fungicides, for example, edifenphos (ed
ifenphos) and IBP (iprobenfos). (viii) Benzimidazole fungicides, for example, thiophanate-methyl, benomyl (benomil)
myl). (ix) carboxamide fungicides, for example, mepronil
(mepronil), flutolanil, tecloftalam, pencicuron, etc. (x) acylalanine fungicides, for example, metalaxyl
(metalaxyl). (xi) N-heterocyclic ergosterol inhibitors, such as, for example, triflumizole. (xii) antibiotic fungicides such as kasugamycin (ka
sugamycin), validamycin A, and the like. (xiii) Other fungicides, such as probenazole (pro
benazole), isoprothiolane, tricyclazole, pyroquilon
n), oxolinic acid, ferimzone
(ferimzon), iprodione, etc. Among the above-mentioned pesticidal active ingredients, herbicides such as imazosulfuron, dimelone, pretilachlor, cafenstrole, fentrazamide, NOJ100, and benzobicyclon are particularly preferable. The pesticidal active ingredient is used in an amount of 1.0 to 50.0% by weight, preferably 2.0 to 30.0% by weight based on the whole preparation.

[0014] A binder may be added to the preparation of the present invention, if necessary. Examples of the binder include dextrin, alpha starch, sodium salt of carboxymethylcellulose, polyvinylpyrrolidone, sodium polyacrylate, polyvinyl alcohol, sodium ligninsulfonate and the like. The binder is used in an amount of 0.5 to 10% by weight, preferably 1.0 to 5.0% by weight, based on the whole preparation. If necessary, two or more types (preferably, two to three types) can be mixed.

Further, a surfactant may be added to the preparation of the present invention, if necessary. Examples of the surfactant include an anionic surfactant and a nonionic surfactant, and specific examples thereof include, for example, an alkylbenzene sulfonate (eg, Neoperex No. 6).
F powder (manufactured by Kao Corporation), New Calgen WG-3
(Manufactured by Takemoto Yushi Co., Ltd.)), polyoxyethylene alkyl ether (eg, Emulmin 110 (Sanyo Chemical Industries, Ltd.)
Emulgen 404 (manufactured by Kao Corporation)), polyoxyethylene alkyl phenyl ether (Emulgen 903)
(Manufactured by Kao Corporation), Nonipol 110 (Sanyo Chemical Industries, Ltd.)
)), Polyoxyethylene alkyl phenyl ether sulfate (Newcargen NX-360 (Takemoto Yushi)
For example, dioctyl sulfosuccinate (Perex OT-P (Kao Corporation), Sanmorin OT)
70 (manufactured by Sanyo Kasei Kogyo Co., Ltd.), Neocall YSK (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Air Roll CT-1 (Toho Chemical Co., Ltd.)
), New Cargen EP-70G (Takemoto Yushi Co., Ltd.)
)), Ditridecylsulfosuccinate (eg, Perex TR (manufactured by Kao Corporation), dicyclohexylsulfosuccinate (eg, perex CS (manufactured by Kao Corporation)), and further, Surfynol 1
04, 104A, 104E, 104H, TG, TG-
E, PC, 61, 82, 40, 465 (all manufactured by Air Products), and Olfine E1010, E1004 (all manufactured by Nissin Chemical Industries), and other acetylene glycol-based surfactants, etc. However, the present invention is not limited thereto, and they may be used alone or, if necessary, as a mixture of two or more kinds in an arbitrary ratio. Of these, dioctyl sulfosuccinate and acetylene glycol-based surfactant are particularly preferred. Sodium ligninsulfonate, sodium naphthalenesulfonate formalin condensate, sodium alkylnaphthalenesulfonate, higher alcohol sulfates such as surfactants, dispersants and wetting agents, such as metal salts of polycarboxylic acids, ammonium polycarboxylates A polycarboxylate such as a salt may be added to the preparation. Among them, higher alcohol sulfates (eg, New Calgen WG-
6 (manufactured by Takemoto Yushi Co., Ltd.)), metal polycarboxylates (eg,
New Calgen WG-5 (manufactured by Takemoto Yushi Co., Ltd.) is preferred. The amount of the dispersant and humectant is about 0.1 to 20% by weight, preferably about 0.5 to 15% by weight,
More preferably, it is about 1 to 10% by weight. If necessary, two or more types (preferably, two to three types) can be mixed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The solid pesticide preparation of the present invention is produced by uniformly dispersing the pesticidal active ingredient and the low-density extender, and then granulating. The preparation of the present invention is prepared by first mixing an agrochemical active ingredient, a low specific gravity extender, and if necessary, a binder, a surfactant, a dispersant, a wetting agent, and an extender, and uniformly dispersing these. Uniformly dispersed means granules
In one, it means that the above-mentioned constituents are present in the inside and near the surface at almost the same content ratio. For example, in order to produce uniformly dispersed granules, the above components are mixed with a commonly used mixer such as a ribbon blender, a V-type mixer, a vertical granulator, etc. in the same manner as in a usual wet method. After mixing well,
Transfer to a kneader, add water, knead, extrude and granulate with an extruder, and after drying and sieving, obtain particles having a particle size of 0.8 to 5.0 mm. The method is not limited as long as a granular solid preparation can be obtained. Since the pesticidal solid preparation of the present invention uses safe ingredients, there is substantially no phytotoxicity to plants (eg, rice), and no harm to humans or animals at or after application, It can be used as a safe formulation. The present invention is practiced by spraying the above pesticide solid formulation by the method described above.

[0017]

The present invention will be described in detail with reference to the following examples, comparative examples and test examples, but the present invention is not limited to these examples. In addition,% used here
All indicate% by weight unless otherwise specified. Example 1 0.9 parts imazosulfuron (generic name), Microsphere F-30E
(Purity 10%, plastic hollow body) 17.0 parts, dextrin 5.0 parts, Toxanone GR-31A (sodium polyacrylate) 2.0 parts, Olfin E1010 (acetylene glycol surfactant) 3.0 parts, white carbon 5.0 parts, bentonite 10.0 parts Then, 72.4 parts of calcium carbonate were mixed, then a predetermined amount of granulation water was added, the mixture was kneaded with a kneader, granulated by a basket granulator equipped with a 1.5 mm screen, and dried at 60 ° C for 2 hours. Thus, granules having an apparent specific gravity of 0.48 were obtained. 1 kg of the granules was sprayed with a sprayer per 10 a of paddy fields.

Example 2 0.9 parts of imazosulfuron (generic name), Microsphere F-30E
(Purity 10%, plastic hollow body) 11.0 parts, dextrin 5.0 parts, Toxanone GR-31A (sodium polyacrylate) 2.0 parts, Olfin E1010 (acetylene glycol surfactant) 3.0 parts, Radiolite (diatomaceous earth) 30.0 parts,
Mix 10.0 parts of bentonite and 48.0 parts of calcium carbonate,
Then add a predetermined amount of granulation water, knead with a kneader, 1.5m
After granulating with a basket-type granulator equipped with a m screen, the granules were dried at 60 ° C. for 2 hours to obtain granules having an apparent specific gravity of 0.40. 1 kg of the granules was sprayed with a sprayer per 10 a of paddy fields.

Example 3 Imazosulfuron (generic name) 2.0 parts, Sunwax 131P
(Polyethylene powder) 68.0 parts, Cellogen 6A (sodium salt of carboxymethyl cellulose) 5.0 parts, Neocol
10.0 parts of YSK (dioctyl sulfosuccinate) and 15.0 parts of calcium carbonate were mixed, then a predetermined amount of granulation water was added, kneaded with a kneader, and granulated with a basket-type granulator equipped with a 1.5 mm screen. Thereafter, the granules were dried at 60 ° C. for 2 hours to obtain granules having an apparent specific gravity of 0.38. Apply these granules to rice paddy 10
Spray 500 g with a sprayer per a.

[0020]

[Comparative Example] Comparative Example 1 Commercially available cyhalofop butyl, pyrazosulfuron-ethyl, mefenacet granules Amount dropped per 10a of paddy field 1kg Screen diameter is 1.2mm Apparent specific gravity 0.92

Comparative Example 2 Commercially available pirimibac-methyl, bensflon-methyl, mefenacet granules Amount dropped per 10a of paddy field 1kg Screen diameter is 1.2mm Apparent specific gravity 1.24

Test Example 1 Preparations obtained in Examples 1 and 2 and Comparative Examples 1 and 2
Was subjected to a spray test by the following method. That is, the formulation for 10a was sprayed with a sprayer, and the time required until the spraying was completed was measured. Table 1 shows the test results.

[0023]

[Table 1] The time required for spraying the 1 kg granules of Comparative Example 1 and Comparative Example 2 was 2.2 minutes and 1.8 minutes, respectively. Generally, however, the farmer used a sprayer per paddy 10a at a normal speed. The time is too short to spread the formulation evenly while walking. On the other hand, the time required for spraying the 1 kg granules of Example 1 and Example 2 was 4.2 minutes and 4.5 minutes, respectively, which was extended by 2 minutes or more as compared with the cases of Comparative Examples 1 and 2. ing. By this extended time, it becomes easier to secure the spraying time per unit area compared to the conventional 1 kg granules,
Uniform application is easily achieved.

[0024]

The effects of the solid agricultural chemical preparation of the present invention include the following. (1) Conventional low-dose granular solid pesticide formulation (eg, 1kg granule)
In comparison with the above, when spraying per unit area, the time required for spraying and the spray distance can be sufficiently ensured, and uniform spraying is easy. (2) It is possible to secure the same spraying time with a smaller amount of the formulation than the conventional granular pesticide solid formulation, and it is possible to reduce the labor force as compared with conventional granules and the like.

Claims (6)

[Claims] 1. A low-dose granular pesticide solid preparation for spraying, having an apparent specific gravity of 0.3 to 0.8 and a particle size of 0.8 to 5.0 mm. 2. A pesticidal solid preparation according to claim 1, which contains an agrochemical active ingredient and a low specific gravity extender. 3. The pesticidal solid preparation according to claim 1, which is a granule having a particle size of 0.8 to 1.7 mm. 4. A low specific gravity extender comprising an inorganic powder, a synthetic resin powder,
3. The solid pesticide formulation according to claim 2, which is at least one selected from natural resin powder and vegetable fine powder. 5. The pesticidal solid preparation according to claim 1, which is applied in an amount of 200 g to 2 kg per 10 a of the paddy field. 6. A method for spraying the solid pesticide formulation according to any one of claims 1 to 5 on a flooded paddy field using a spraying device.