JP2013035761A - Agricultural granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural granule capable of showing an effect of an agrochemical active ingredient after application, concerning the granule containing the agrochemical active ingredient whose water solubility at 20°C is ≤10 ppm.SOLUTION: This agricultural granule contains an agrochemical active ingredient whose water solubility at 20°C is ≤10 ppm, and the agrochemical active ingredient is coated on an outer layer part of the granule. Hereby, the agrochemical active ingredient can be eluted quickly after application for a long period, and a remarkable effect of the agrochemical active ingredient can be shown. Further, this agricultural granule has little risk of causing harmful effects of chemicals.

Description

The present invention relates to an agricultural granule containing an agrochemical active ingredient having a water solubility at 20 ° C. of 10 ppm or less, and more specifically, it is possible to promote the time of manifestation of the effect of the agrochemical active ingredient and the occurrence of phytotoxicity. It relates to agricultural granules with little fear.

In recent years, rapid solubilization of an agrochemical active agent component has been demanded for the purpose of maximizing and maximizing the effect of the agrochemical active component. In general, active ingredients for agricultural chemicals used for paddy rice are often used in the form of granules from the viewpoint of labor saving and safety during spraying. A general aspect of the granule is an extruded granule prepared by mixing an agrochemical active ingredient and a carrier such as clay, etc., adding water to this, kneading and extruding, granulating, and drying. . In such an aspect of the granule, since the pesticidal active ingredient is uniformly dispersed throughout the granule, the elution of the pesticidal active ingredient having low water solubility present in the interior of the grain is not sufficient, and thus the pesticidal active ingredient In some cases, the effects expected from the above were not fully exhibited.
Among them, fulvendiamide has a very high effect on the main diseases and pests in rice cultivation, but has a problem as described above when it is granulated by a usual method due to its extremely low water solubility.

  Non-Patent Document 1 Pesticide Handbook 2011 Edition (Japan Plant Protection Association)

The subject of this invention is providing the granule for agriculture which can express the effect of an agrochemical active ingredient after application in the granule containing the agrochemical active ingredient whose water solubility in 20 degreeC is 10 ppm or less.

As a result of intensive studies to develop an agricultural granule that can accelerate the time when the effect of the agricultural chemical active ingredient is manifested and is less likely to cause phytotoxicity, the present agricultural chemical active ingredient having a water solubility of 10 ppm or less at 20 ° C. Even in the case of agricultural granules containing scientists, they have developed agricultural granules capable of expressing the remarkable effects of the agrochemical active ingredient over a long period after application.

That is, the present invention
[1] An agricultural granule containing an agricultural chemical active ingredient having a water solubility of 10 ppm or less at 20 ° C., wherein the agricultural chemical active ingredient is coated on the outer layer of the granule. ,
[2] The agricultural granule according to [1], wherein the pesticidal active ingredient is fulvendiamide,
[3] Agricultural granules according to [1] to [2], wherein the content of fulvendiamide is 0.1 to 3% by weight based on the whole granules,
[4] A method for producing an agricultural granule, characterized in that while mixing the inner core particles, fulvendiamide and a binder are added and the outer layer part of the granules is coated.
[5] A method for using the agricultural granules, characterized by treating an effective amount of the agricultural granules according to [1] to [3] on a crop or surrounding soil,
About.

The agricultural granule of the present invention is an agrochemical active ingredient having a water solubility at 20 ° C. of 10 ppm or less, and realizes a rapid effect.

In the present invention, active ingredients such as herbicides, plant growth regulators, insecticides, and fungicides can be used as the agrochemical active ingredients. In the present invention, the water solubility at 20 ° C. is 10 ppm or less. Certain agrochemical active ingredients are targeted. Examples of the pesticidal active ingredient used in the agricultural granule of the present invention include an insecticidal active ingredient, a bactericidal active ingredient, a herbicidal active ingredient, and a plant growth active ingredient.

Insecticidal compounds include, for example, fulvendiamide, chlorantraniliprole, cyantraniliprolol, pyridalyl, etofenprox, fipronil, carbosulfan, cycloprotorin, buprofezin, bensultap, propoxur, cypermethrin, bifenthrin, acrinathrin, etho Fenprox, tefluthrin, teflubenzuron, diflubenzuron, hexaflumuuron, lufenuron, flufenocrson, chlorfluazuron, tebufenozide, chromafenozide, benzoepin, chlorfenapyr, diafenthiuron, indoxacarb, metaflumizone, dinotefuran, etc. , Fulvendiamide, chlorantraniliprole, and cyantraniliprole are preferable.

  Examples of the bactericidal compound include dichromedin, tifluzamide, carpropamide, procymidone, fusalide, diclocimet, trifloxystrovirlin, famoxadone, pencyclon, dithianone, cyazofamid, thiazinyl and the like.

  Examples of herbicidal compounds include benzophenap, benzobicyclon, cumyluron, mefenacet, fentrazamide, bromobutide, chromeprop, esprocarb, pyributycarb, cyhalohopbutyl, caventhrol, pyrazolate, pyrazoxifene, pyriminobacmethyl, oxadichromemephone, pentoxazone, pyraflu Examples include phenethyl, flumioxazin, chromeprop, quizalofopethyl, fenmedifam, piributicalbu, benzophenap, prodiamine, pendimethalin, biphenox, pentoxazone, oxadichromemephone, and benzobicyclon.

Examples of the insect growth control compound include diflubenzuron, teflubenzuron, lufenuron, flufenoxuron, chlorfluazuron, novallon, tebufenozide, chromafenozide, methoxyphenozide, buprofezin, cyromazine and pyriproxyfen.

Examples of plant growth regulating compounds include ethephon, indolebutyric acid, ethiclozeate, 1-naphthylacetamide, 4-CPA, benzylaminopurine, forchlorphenuron, gibberellin, uniconazole P, chlormequat, paclobutrazol, flurprimidol, Examples include trinexapac ethyl and daminogit.

Furthermore, for example, “Agricultural Chemicals Handbook 2011 Edition” (Japan Plant Protection Association), “The
Pesticide Manual 14th
Edition "(British Crop Protection
Council) and other agricultural chemicals having a solubility in water at 20 ° C. of 10 ppm or less can also be used as the agricultural chemical active ingredient of the present invention. These agrochemical active ingredients can be used alone or in combination of two or more.

The fulvendiamide preferably used as the pesticidal active ingredient of the present invention is a compound having an excellent effect in controlling Lepidoptera pests. The blending amount of fulvendiamide in the granule of the present invention is preferably from 0.1 to 3% by weight, more preferably from 0.2 to 2% by weight, based on the whole granule.

In the present invention, when other pesticidal active ingredients are used as the pesticidal active ingredient, the blending amount can be appropriately adjusted in consideration of the medicinal effect of the pesticidal active ingredient according to the above blending amount.

The inner core particle of the granule of the present invention is composed of a solid carrier and other components blended as necessary. Examples of the solid carrier include bentonite, clay, kaolin, sericite, talc, acid clay, pumice, zeolite, vermiculite, perlite, calcium carbonate, silica sand and the like.

Other components include a sustained release improver such as wax, alkyl sulfate esters, aryl sulfonates, polyoxyethylene glycol ethers, polyhydric alcohol esters, dialkyl sulfosuccinates, polycarboxylic acids, etc. Surfactants, starch, alginic acid, glycerin, polyvinylpyrrolidone, polyurethane, polyethylene glycol, polypropylene glycol, polybutene, polyvinyl alcohol, gum arabic, liquid paraffin, ethyl cellulose, polyvinyl acetate and other colorants, dyes, pigments and other colorants, etc. Can be illustrated.

The outer layer portion of the granule of the present invention is composed of an agrochemical active ingredient having a water solubility of 10 ppm or less at 20 ° C. and other ingredients blended as necessary. Other components include stabilizers for agrochemical active ingredients such as alkali metal salts, alkaline earth metal salts, epoxidized oils and fats, solid carriers such as bentonite, diatomaceous earth, white carbon, and solid carriers exemplified as inner core particle components, Examples include release improvers, surfactants, binders, and other agrochemical active ingredients.

In the production of the granule of the present invention, 1) a solid carrier, and if necessary, other components are mixed with an ordinary granulator such as an extrusion granulator, a stirring granulator, a rolling granulator or a fluidized bed granulator. Grains produced using a granulator are used as inner core grains. A method in which the inner core particles are mixed using a normal mixer such as a concrete mixer or a nauta mixer, and a pesticide active ingredient, and if necessary, a solid carrier and other components are coated with a binder as appropriate, or 2) silica sand Or non-oil-absorbing carrier such as calcium carbonate is used as inner core particles, and the surface of the inner core particles is manufactured by a method in which an agrochemical active ingredient and, if necessary, a solid carrier or other components are appropriately coated with a binder. Examples of the shape of the inner core particle include a spherical product having a diameter of 0.1 to 30 mm, a cylindrical product having a diameter of 0.1 to 5 mm, a length of 1 to 30 mm, and an aspect ratio (length / diameter) of 1 to 10. .

Examples of the binder that can be used in the production of the granule of the present invention include lignin sulfonate, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, starch, dextrin, and polyacrylate, and polyvinyl alcohol is preferred.

The agricultural granule of the present invention can be applied to all scenes in the application of agricultural chemicals, but is particularly effective in the scene where it is applied at the seed germination / rooting stage or the seedling growth stage, so-called sowing and seedling raising period. For example, in the case of paddy rice seedling seedling, when it is mixed with seedling culture soil, before sowing at the time of sowing or after covering, application during the period from the germination period to just before transplanting has been developed. Application is also possible. In addition, cell tray raising seedlings such as vegetables can be similarly applied from the time of mixing seedling culture soil to the time of transplanting, and particularly preferred are application at the time of sowing and germination, and the treatment of planting holes at the time of transplanting.
In the sowing and seedling raising period, usually a seedling culture soil is used, but it can also be applied to other cultures such as seedling mats and sheets.

As the application method, it can be applied by the same method as normal agricultural granule, for example, direct granulation by hand, human-powered granulator, electric granulator, back-loaded power granulation Examples thereof include a method using an air granulator such as a machine, a traveling power granulator, a tractor-equipped granule mill, a rice transplanter-equipped granule mill, a sideline application medicine, an unmanned helicopter.
For example, in paddy rice seedling box medicine, agricultural granules are scooped up with a measuring cup that can measure a predetermined amount, sprinkled on the seedling box, put into a special seedling box spraying container, sprinkled into the seedling box, agricultural grains A method of directly spraying seedling boxes from the outlets and holes provided in the packaging container, a method of spraying a large number of seedling boxes arranged widely using a power-type granulator, and a dedicated seeding operation Examples thereof include a method of granulating the seedling box in the apparatus and a method of mixing with the seedling soil.

  In order to properly perform the above-described spraying, it is preferable that the physical properties of the agricultural granules of the present invention are within a certain range for various items. For example, the apparent specific gravity is preferably 0.3 to 2.0, more preferably 0.5 to 1.5 in the official agricultural chemical inspection method. The hardness of the grains is preferably 20 or less, more preferably 10 or less in the whole agricultural ball mill method. It is preferable that the particle size is 90% by weight or more of the whole granular composition which passes through a sieve having an opening of 1700 μm and does not pass through a sieve having an opening of 300 μm. Moreover, when a particle | grain is cylindrical, the diameter of a cross-sectional circle has preferable 0.3-2.0 mm, More preferably, it is 0.5-1.5 mm. The grain length corresponding to the height of the cylinder is preferably 0.5 to 6 times the circular diameter of the cross section. However, when spraying using a dedicated device at the time of sowing, for example, a seedling box-applied drug spraying device (beauty Good, model KS-25: Roller-type granulator), seedling box medicine hopper (Suzutec, model SDP-33S, SDP-103S: Roller-type granulator), pot seedling box medicine device (Minoru Industry Co., Ltd.) Manufactured, type MPA-21: roller type granulator), particles having a grain length of 2.5 times or more with respect to the cross-sectional circle diameter should be 50% by weight or less of the whole granular composition. Is more preferable, and more preferably 10 to 40% by weight.

In addition, the application amount at the time of applying the agricultural granule of the present invention is 0.1 to 20 kg, preferably 0.2 kg to 5 kg per 10 ares in the case of paddy fields and upland fields. The seedling box (usually 0.16 m ² ) is 10 to 200 g, preferably 10 to 100 g per sheet. For example, when applied to a cell tray, an application amount of about 30 g per cell tray (128 holes) may be used.

Hereinafter, the present invention will be described in more detail with reference to Examples, Comparative Examples, and Test Examples. In the following description, parts simply represent parts by weight and parts% represent weight%.

Example 1
Add 5 parts of paraffin (trade name “paraffin wax 150”, manufactured by Nippon Seiki Co., Ltd.), 3 parts of white carbon (trade name “Carplex # 80-D”, manufactured by Evonik Degussa), and calcium carbonate (trade name) “Charcoal Cal NS- # 100” (manufactured by Nitto Flour Milling Co., Ltd.) was added to the above components to 98.13 parts, mixed, a small amount of water was added, and then granulated with a bread granulator Formed and dried at 40 ° C. for 2 hours to obtain inner core particles (A).

  While mixing the obtained inner core particles (A) with a Nauta mixer, 1 part of fulvendiamide base (active ingredient amount), 0.02 part of polyvinyl alcohol, 0.25 part of lignin sulfonate and 2 parts of water were added, Further, 0.6 parts of white carbon (trade name “Carplex # 80-D”, manufactured by Evonik Degussa) was added, and then dried at 40 ° C. to obtain agricultural granules of Example 1.

Example 2
While mixing 98.13 parts of pumice (trade name “Kagalite 2”, manufactured by Neolite Kosan Co., Ltd.) with a Nauta mixer, 1 part of fulvendiamide base (active ingredient amount), 0.02 part of polyvinyl alcohol, lignin sulfonate 0.25 parts and 2 parts of water were added, and further 0.6 parts of white carbon (trade name “Carplex # 80-D”, manufactured by Evonik Degussa) was added, followed by drying at 40 ° C. The agricultural granule of Example 2 was obtained.

Example 3
Add 6 parts of thiazinyl drug substance (active ingredient amount), 3.5 parts of white carbon (Carplex # 1120), 3 parts of bentonite (C bent), 2 parts of polyvinyl alcohol (PVA224), 1.5 parts of calcium carbonate, and Clay (NO clay) is added and mixed to a total of 100 parts, 23.3 parts of water is added and kneaded, and then a cylindrical inner core particle having a diameter of 1 mm and an aspect ratio of about 3 is obtained with a basket reuser. This was dried at 60 ° C. for 2 hours to obtain inner core particles (B).

While rolling the resulting inner core particle (B) with a concrete mixer, add 1 part of fulvendiamide base (active ingredient amount), 0.02 part of polyvinyl alcohol, 0.25 part of lignin sulfonate and 2 parts of water. Furthermore, 0.6 parts of white carbon (trade name “Carplex # 80-D”, manufactured by Evonik Degussa) was added, and then dried at 40 ° C. to obtain agricultural granules of Example 3.

Comparative Example 1
2. 1 part of fulvendiamide (active ingredient amount) paraffin (trade name “paraffin wax 150”, manufactured by Nippon Seiki Co., Ltd.), white carbon (trade name “Carplex # 80-D”, manufactured by Evonik Degussa) 6 parts, 0.02 part of polyvinyl alcohol and 0.25 part of lignin sulfonate, and further calcium carbonate (trade name “Charcoal Cal NS- # 100”, manufactured by Nitto Flour Milling Co., Ltd.) and 100 parts together with the above components Then, after adding a small amount of water, it was granulated with a bread granulator and dried at 40 ° C. for 2 hours to obtain a granule of Comparative Example 1.

Comparative Example 2
1 part of fulvendiamide (active ingredient amount), 6 parts of thiazinyl drug substance (active ingredient amount), 3.5 parts of white carbon (Carplex # 1120), 3 parts of bentonite (C bent), 2 parts of polyvinyl alcohol (PVA224), Add 1.5 parts of calcium carbonate, add more clay (NO clay) to a total of 100 parts, mix, add 23.3 parts of water, knead, and then use basket basketr to adjust the diameter to 1 mm. A cylindrical inner core particle having a ratio of about 3 was obtained and dried at 60 ° C. for 2 hours to obtain a granule of Comparative Example 2.

Test example 1 (dissolution test)
80 mg of each granule of Examples 1 to 3 and Comparative Examples 1 to 2 was put into a beaker containing 800 ml of activated carbon-treated water. A test solution was collected from the center of the beaker every predetermined time, and the content of the active ingredient was measured by high performance liquid chromatography to calculate the elution rate. The results are shown in Table 1.

As is clear from the results in Table 1, it can be seen that in the granule of Example 1 according to the present invention, fulbenzamide elutes more quickly than in Comparative Example 1. Similar trends were observed in Examples 2 and 3.

This invention is not limited to the combination of the said Example, It can apply also to the combination of another agrochemical active ingredient.

ADVANTAGE OF THE INVENTION According to this invention, it can be set as the agricultural granule which can express an effect immediately after application of an agrochemical active ingredient.

Claims (5)

An agricultural granule containing an agrochemical active ingredient having a water solubility at 20 ° C. of 10 ppm or less, wherein the agrochemical active ingredient is coated on the outer layer of the granule. The agricultural granule according to claim 1, wherein the agrochemical active ingredient is fulvendiamide. The agricultural granule according to claim 1 or 2, wherein the content of fulvendiamide is 0.1 to 3% by weight based on the whole granule. A method for producing an agricultural granule, comprising mixing fulvendiamide and a binder while mixing inner core particles, and coating the outer layer portion of the granule. An effective amount of the agricultural granule according to any one of claims 1 to 3 is treated on a crop or surrounding soil.