KR20060001315A - Water dispersible agricultural medicine and its preparing method - Google Patents

Abstract

The present invention provides 0.1 to 10% by weight of the pesticide active ingredient, 5 to 15% by weight of solvent, 0.1 to 3% by weight of surfactant, 0.5 to 2% by weight of binder, 0 to 25% by weight of co-solid carrier and 45 to The present invention relates to a pesticide granule consisting of 94.3% by weight of a water-soluble solid carrier and a preparation method thereof.

When the pesticide granules of the present invention are emulsified in water, the pesticide granules are emulsified and diffused in water, so that the active pesticides contained in the pesticide granules are uniformly eluted to maximize the control effect on the target pest or the target. As a pesticide-type pesticide, due to the excellent diffusibility of the emulsified pesticide in water, even if the appropriate amount of drugs are treated at a certain point to express a good control effect, there is no risk of pesticide poisoning of workers, and the solvent used in conventional pesticide pesticides It is an environmentally friendly pesticide pesticide that can be saved.

Underwater Emulsifying Pesticides, Oil Painting

Description

Water-emulsifying pesticide granules and its manufacturing method {WATER DISPERSIBLE AGRICULTURAL MEDICINE AND ITS PREPARING METHOD}

The present invention relates to an emulsified pesticide in water and a method for preparing the same, and more particularly, the pesticide preparation of the present invention is emulsified in water so that the active ingredient of the pesticide is spread and dispersed evenly by emulsifying in water. The present invention relates to an emulsified pesticide in water and a method for producing the same, which can maximize a control effect on a target pest or an object.

Conventionally, powder-like compositions such as powder and hydrating powder occupy the mainstream in the formulation of pesticides, but this is inconvenient to handle, and in particular, the worker is directly exposed to powdered pesticides through respiration, and thus the danger of pesticide poisoning cannot be avoided. In the case of liquid compositions such as hydrating agents, the risk of pesticide poisoning can be avoided because spraying the stock solution directly causes the crops to be weakened. Most workers use a manual sprayer or a large mechanical sprayer to spray diluted pesticides directly into the paddy field. There are problems that are difficult to spray in the enclosed and wide areas. In particular, in the case of the liquid phase, the organic solvent contained in the composition is pointed out to cause environmental pollution has emerged as another problem.

In addition, although there is a form of granules as a direct spraying agent, there is a problem that it is difficult to evenly spread the pesticide active ingredient after spraying, which causes the risk of weakness occurs in the excessive distribution of the pesticide active ingredient.

In order to solve these problems, recently, various formulations such as granular water-forming agent, sleep-injured granules, and oil-based expansion-type composition have been developed, and studies for vitalization of agricultural work are active, but these formulations are still in the domestic introduction stage. There is still a problem that needs to be improved.

In Korean Patent Application No. 93-26503, a pesticide solid agent mixed with an active pesticide active ingredient and a floating carrier, in particular a floating carrier selected from foamed sand, vermiculite, foamed pearlite or cork, was prepared. It is known that the formulation is easy to put directly into the paddy in the form of a pack configured to wrap in, and that the pesticide component can be easily sprayed on the water surface of the melting furnace of the water-soluble film when contacted with water. In addition, the sleep-floating pesticide solids in the Republic of Korea Patent Application No. 93-18849 contains the pesticide active ingredient in the pulverized blowing agent to prepare a pesticide solids and to throw from the rice field to easily carry the pesticide active ingredient in water It is designed to produce a control effect by dispersing in.

In Korean Patent Application No. 93-7, a pesticide preparation for throwing is formed by forming a tablet containing an active ingredient of an agrochemical and having an apparent specific gravity in the range of 0.7 to 1.0, and sealing it with a water-soluble film, a paper, and a nonwoven fabric which are easily dispersed therein. Has been disclosed. In addition, Korean Patent Application No. 92-17546 proposes an agrochemical composition configured to have a surface floating rate of 80 or more after 10 seconds and 20 or less after 30 minutes by coating a hydrophobic agent and a expansion agent on granules disintegrating and dispersing in water. It became. In addition, there is a high boiling point solvent having a specific gravity of 1 or less of water-insoluble or non-aqueous solvent, a surfactant for sleep at the time of containing a surfactant having a value of 6 or less of HLB and a solid carrier [Korean Patent Application No. 89-4426] There is a sleep application pesticide preparation (Korean Patent Application No. 80-3150) in which the components and the lead substance are emulsified and dispersed in a water dispersible substance so that the particles containing the pesticide active ingredient are suspended in the water surface. On the other hand, Nippon Gunpowder Co., Ltd., Japan, does not allow particles to come into contact with the soil as floating particles, thereby increasing the amount of active ingredient distributed in the water surface than in the water, thereby improving the penetration performance or gas action from the foliage to the conductor. We have developed waterborne floating pesticides.In addition, we have developed various formulations such as liquid hydrating agent for sleep treatment, sleep development agent for sleep treatment, low weight granulation, sleep treatment method, faucet treatment method and general treatment method. Treatment methods are being developed.

However, the conventional formulations developed above have been found to have application in terms of high efficiency in terms of viability and pharmacological action, and granular formulations expose many disadvantages in terms of wind influence, limitation of mobility, and the like. In addition, the formulation prepared in the form of a package packaged separately, there is a problem that the concentration of the pesticide active ingredient is ubiquitous due to insufficient or non-uniformity of the dissolution of the pesticide active ingredient. Therefore, it is urgent to develop an underwater emulsified pesticide granule that is easy to use and has an excellent diffusion function by supplementing the above problems.

It is an object of the present invention to provide an emulsified pesticide in water that can be emulsified in water to uniformly elute pesticide active ingredients to maximize the control effect on pests or objects.

Another object of the present invention is 0.1 to 10% by weight of the pesticide active ingredient, 5 to 15% by weight solvent, 0.1 to 3% by weight surfactant, 0.5 to 2% by weight binder, 0 to 25% by weight of auxiliary solids To provide an emulsified pesticide in water consisting of a carrier and 45 to 94.3% by weight of a water-soluble solid carrier.

Still another object of the present invention is to provide a method for preparing the emulsified pesticide in water.

In order to achieve the above object, the present invention provides 0.1 to 10% by weight of the pesticide active ingredient, 5 to 15% by weight of solvent, 0.1 to 3% by weight of surfactant, 0.5 to 2% by weight of binder, 0 to 25% by weight An auxiliary solid carrier of 45 to 94.3% by weight of water-soluble solid carrier is provided.

Pesticide active ingredients may be water-soluble, poorly water-soluble and non-water-soluble pesticide active ingredients, examples of which are azimsulfuron, bensulfuronmethyl, cynosulfuron, cyclosulfamuron, imazosulfuron, cymetrine, memethol. Herbicides such as phenacet and molinate metamipov; Fungicides such as beam, capropamide, isoprothiolane, and insecticides such as chlorpyriphosmethyl, imidacloprid, fipronil, and the like, and may be used alone or in combination of two or more thereof.

The solvent may be used as long as it is miscible with the active ingredient of the pesticide, but an ester organic solvent containing diisotridecyl phthalate is more preferable.

The surfactant is selected solely from the group consisting of sulfonates consisting of alkyl sulfonates and dialkyl sulfonates, or succinates consisting of alkyl sulfosuccinates, bis (alkyl) sulfosuccinates, sulfate salts comprising alkyl sulfates, or Mixed forms thereof may be used, and the alkyl is a C ₆ to C ₁₂ alkyl group.

The binder is used alone or in combination of two or more selected from the group consisting of water-soluble starch, dextrin, carboxymethylcellulose, sodium polyacrylate and xanthan gum.

The auxiliary solid carrier is preferably used alone or in combination of two or more selected from silicon dioxide, bentonite and white carbon.

The water-soluble solid carrier can be used as long as it is a water-soluble inorganic salt, but it is more preferable to use ammonium sulfate and potassium chloride. At this time, the water-soluble solid carrier may be used alone or in combination of two or more.

In another aspect, the present invention provides a method for preparing the emulsified pesticide in water. More specifically, 1) preparing a solid phase by mixing and kneading 0.5 to 2% by weight of the binder, 0 to 25% by weight of the auxiliary solid carrier and 45 to 94.3% by weight of the water-soluble solid carrier; 2) manufacturing a granule (Core Granule) by extruding the solid part using a granulation machine; 3) preparing a liquid phase by dissolving 0.1 to 10% by weight of the pesticide active ingredient in 5 to 15% by weight of an ester organic solvent and mixing 0.1 to 3% by weight of a surfactant; And 4) uniformly spraying and drying the liquid phase onto the granular matrix.

Hereinafter, the present invention will be described in detail with reference to specific examples.

The emulsified pesticide in water of the present invention is 0.1 to 10% by weight of the pesticide active ingredient, 5 to 15% by weight of solvent, 0.1 to 3% by weight of surfactant, 0.5 to 2% by weight of binder, 0 to 25% by weight of An auxiliary solid carrier and 45 to 94.3% by weight of a water soluble solid carrier.

In the above pesticide active ingredient to show the actual medicinal effect, herbicides have a herbicidal effect, fungicides have a role of insecticide effect, insecticides, and all herbicides, fungicides and pesticides are known or commercially used. Such pesticide active ingredients may use both water-soluble, poorly water-soluble and non-water-soluble pesticide active ingredients, which may be used without being significantly affected by physical and / or chemical properties such as formulation, solubility, etc. of the pesticide active ingredient itself.

As an example of the pesticide active ingredient, Azimsulfuron (Azimsulfuron; 1- (4,6-dimethoxy-

pyrimidin-2-yl) -3- [1-methyl-4- (2-methyl-2H-tetrazol-5-yl) -pyrazol-5-yl- sulfonyl] urea, Bensulfuron methyl; α- ( 4,6-dimethoxypyrimidin-2-yl-carbamoylsulfamoyl) -o-toluidic acid), Cinosulfuron; 1- (4,6-dimethoxy-1,3,5-triazin-2-yl) -3- [ 2- (2-methoxyethoxy) phenyl-sulfonyl] urea, Cyclosulfamuron; 1-{[2- (cyclopropylcarbonyl) phenyl] sulfa-moyl} -3- (4,6-dimethoxy-2-pyrimidinyl) urea , Imazosulfuron; 1- (2-chloroimidazo [1,2-α] pyridin-3-yl-sulfonyl) -3- (4,6-dimethoxy-pyridin-2-yl) urea), metrin ( Simetryn; N2, N4-diethyl-6-methylthio-1,3,5-triazine-2,4-diamine, Mefenacet ;-( 1,3-benzothiazol-2-yl-oxy) -N- methyl-acetanilide, Molinate (s-ethylazepane-1-carbothioate), Metamipov ((R) -2- [4-[(6-chloro-2-benzoxazolyl) oxy] phenoxy] -N Herbicides such as-(2-fluorophenyl) -N-methyl), beam (5-methyl-1,2,4-triazole- [3,4-b] [1,3] benzothiazole), caproamide ( Carpropamid; 2,2-dichloro-N- [1- (4-chloro disinfectants such as -phenyl) ethyl] -1-ethyl-cyclopropanecarboxamide and isoprothiolane (di-isopropyl-1,3-dithiolan-2-ylidenemalonate) and chlorpyrifosmethyl (o, o-dimethyl- o-3,5,6-trichloro-2-pyridyl-phosphorothioate), Imidacloprid; 1- (6-chloro-3-pyridyl-methyl) -N-nitroimidazolidin-2-ylideamine), fipronil ; Insecticides such as (±) -5-amino-1- (2,6-dichloro-α, α-trifluoro-ρ-toyl) -4-trifluoro-methyl-sulfinylpyrazole-3-carbonitrile) Or a mixture of two or more kinds. In addition, these are only listed by way of example, it can be easily understood by those skilled in the art that all conventional pesticide active ingredients including them can be used. If the pesticide active ingredient is less than 0.1% by weight, the amount of active pesticide active ingredient is too small to expect sufficient efficacy of the pesticide, if it exceeds 10% by weight, too much pesticide active ingredient contained in the individual pesticide granules of the present invention Not only the amount of solvent used to prepare the pesticide formulations increases, but also the dispersibility that can be emulsified evenly in water can be reduced.

The solvent serves to dissolve the pesticide active ingredient, and is preferably environmentally friendly, which does not pollute the environment. As an example thereof, an ester organic solvent is used. However, the solvent should not contain water. If the solvent is less than 5% by weight, it may not be expected to have sufficient dissolving power in the pesticide active ingredient, if it exceeds 15% by weight, the appearance and physical properties of the pesticide preparation of the present invention may be lowered.

Surfactant is an amphiphilic substance having a high surface activity and has hydrophilic and lipophilic molecular groups in a molecule, and it is understood that it has excellent properties in washing power, dispersing power, emulsifying power, solubilizing power, wetting power, bactericidal power, foaming power, and penetration power. It is a substance, and can be understood as a substance which acts to allow the pesticide preparation according to the present invention to diffuse evenly after forming an emulsified phase in water. The surfactant is selected from the group consisting of sulfonates consisting of alkyl sulfonates and dialkyl sulfonates, or succinates consisting of alkyl sulfosuccinates, bis (alkyl) sulfosuccinates, and sulfate salts comprising alkyl sulfates. Either alone or a mixture thereof may be used, and the alkyl is a C ₆ to C ₁₂ alkyl group.

When the surfactant is used in less than 0.1% by weight, the dispersing effect of the pesticide granules by the surfactant is inferior, when the surfactant is used in excess of 3% by weight, the surfactant forms a micelle structure, to the micelle structure As a result, the pesticide active ingredients may not be sufficiently dispersed or dissolved in water and may be aggregated by micelles to inhibit the efficacy of the pesticide active ingredient.

The binder serves to bind the auxiliary solid carrier and the water-soluble solid carriers described below including the pesticide active ingredient to each other, and in the group consisting of water-soluble starch, dextrin, carboxymethylcellulose, sodium polyacrylate and xanthan gum. Selected alone or two or more may be used.

The auxiliary solid carrier maintains the shape of the granular matrix, and functions as a material forming the surface of the pesticide granules by adsorbing and powdering the liquid part prepared by mixing the active ingredient of the pesticide, the surfactant and the solvent, and silicon dioxide, bentonite and white. Preference is given to using single or a mixture of two or more selected from carbons.

The water-soluble solid carrier comprises a pesticide active ingredient while occupying most of the pesticide granules of the present invention, and includes a pesticide active ingredient, and is dissolved in water to provide a driving force to disperse the emulsified pesticide granules of the present invention. As such, inorganic salts which are themselves soluble in water are preferred. In particular, it is more preferable to use ammonium sulfate and potassium chloride as water-soluble solid carriers. At this time, the water-soluble solid carrier may be used alone or in combination of two or more.

In another aspect, the present invention provides a method for preparing the emulsified pesticide in water. More specifically, 1) preparing a solid phase by mixing and kneading 0.5 to 2% by weight of the binder, 0 to 25% by weight of the auxiliary solid carrier and 45 to 94.3% by weight of the water-soluble solid carrier; 2) manufacturing a granule (Core Granule) by extruding the solid part using a granulation machine; 3) preparing a liquid phase by dissolving 0.1 to 10% by weight of the pesticide active ingredient in 5 to 15% by weight of an ester organic solvent and mixing 0.1 to 3% by weight of a surfactant; And 4) uniformly spraying and drying the liquid phase onto the granular matrix.

During the preparation of the granular matrix, the process of mixing the binder, the auxiliary solid carrier, and the water-soluble solid carrier may be performed by wet mixing, dry mixing, or partial dry mixing, but preferably 15 wt. It is kneaded by adding% water and extruded using a granulating machine. When extruding, it can be molded into granules of a certain diameter by using a horizontal extrusion machine with a screen having a hole of 0.7 to 1.2 mm in diameter, but is not limited thereto. It can be easily understood by those skilled in the art that can vary depending on the content.

Drying of the molded granular matrix may be air dried at a ventilation temperature of 40 to 90 ℃, preferably hot air dry at a ventilation temperature of 60 to 80 ℃, of course, other conventional drying apparatus may be used It can be understood. At this time, the drying time is adjusted so that the moisture content of the granular matrix can be less than 3% by weight.

The process of spraying the liquid phase to the granular parent body prepared as in the above manufacturing process is carried out simultaneously with the spray using a conventional fluidized bed dryer and a spray dryer.

At this time, the drying time is adjusted so that the content of water after the drying process is less than 0.1% by weight.

In addition, in order to throw out the pesticide of the present invention, the finished pesticide granules can be packaged in a water-soluble film bag for each unit weight, preferably 10 to 100g can be packaged in one water-soluble film bag. Thus, the emulsified water-in-water pesticides of the present invention packaged in a water-soluble film bag are treated in a paddy field by throwing a certain number per unit area in a water-soluble film bag, thereby simplifying the application of the pesticide. After being thrown away, the water-soluble film bag containing the pesticide granules is first dissolved in water, and then the pesticide granules packed in the water-soluble film bag are gained momentum by the properties of the pesticide granules themselves, and include the active ingredient of the pesticide. The emulsification and dispersibility of the pesticide granules and the dispersion by dissolution of water-soluble solid carriers over time and their release into the water can be applied to the whole paddy field at even concentration.

As the water-soluble film bag, a bag made of a conventional water-soluble film that can be dissolved after a predetermined time with respect to low temperature water, such as polyvinyl alcohol and a water-soluble cellulose film, may be used. All of the bags are well known to those skilled in the art to be readily understood and commercially available.

Hereinafter, the present invention will be described in more detail with reference to Examples.

This embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

<Example 1>

0.01 kg of sodium polyacrylate as a binder, 0.01 kg of xanthan gum, and 9.71 kg of potassium chloride as a water-soluble solid carrier were mixed and kneaded, followed by extrusion molding with a granulator and drying to prepare a granular mother body. As a pesticide active ingredient, 0.1 kg of metamipope in powder was dissolved in 0.12 kg of diisotridecyl phthalate, and 0.05 kg of bis (2-ethylhexyl) sulfosuccinate sodium salt was mixed as a surfactant to prepare a liquid phase. The residue was attached to the surface of the granules by spraying the granules with a spray dryer using a spray dryer, adsorbing and drying to complete the pesticide granules.

<Example 2>

As a binder, 0.01 kg of sodium polyacrylate, 0.01 kg of xanthan gum, as an auxiliary solid carrier, 0.06 kg of white carbon, 9.65 kg of potassium chloride as a water-soluble solid carrier were mixed and kneaded, followed by extrusion molding with a granulator and drying to prepare a granular matrix. Except that was carried out in the same manner as in Example 1, to complete the pesticide preparation.

<Example 3>

As a binder, 0.01 kg of sodium polyacrylate, 0.01 kg of xanthan gum, as an auxiliary solid carrier, 0.06 kg of white carbon, 9.65 kg of potassium chloride as a water-soluble solid carrier are mixed and kneaded, followed by extrusion molding with a granulator and drying to obtain a granular matrix. Except for preparing, was carried out in the same manner as in Example 1, to complete the pesticide preparation.

<Example 4>

As a binder, 0.01kg of sodium polyacrylate, 0.01kg of xanthan gum and 9.66kg of potassium chloride as a water-soluble solid carrier were mixed and kneaded, followed by extrusion molding with a granulator and drying to prepare a granular matrix. In the same manner, the pesticide preparation was completed. As a pesticide active ingredient, 0.1 kg of powdered metamipov was dissolved in 0.12 kg of diisotridecyl phthalate, and 0.05 kg of bis (2-ethylhexyl) sulfosuccinate sodium salt and 0.05 kg of dodecyl sulfate sodium salt were used as a surfactant. The liquid phase was mixed to prepare a liquid phase, and the liquid powder was sprayed onto the granular matrix by using a spray dryer, and the residual powdery surfactant was attached to the surface of the granules while adsorbing and drying to complete the pesticide granules.

Example 5

As a pesticide active ingredient, 0.5 kg of chlorpyriphos methyl and 9.67 kg of potassium chloride as a water-soluble solid carrier were used in the same manner as in Example 1 to complete the pesticide preparation.

<Example 6>

As a pesticide active ingredient, 0.5 kg of chlorpyriphos methyl and 9.61 kg of potassium chloride as a water-soluble solid carrier were used in the same manner as in Example 2 to complete the pesticide preparation.

<Example 7>

As a pesticide active ingredient, 0.5 kg of chlorpyriphos methyl and 9.61 kg of potassium chloride as a water-soluble solid carrier were used in the same manner as in Example 3 to complete the pesticide preparation.

<Example 8>

As a pesticide active ingredient, 0.5 kg of chlorpyriphos methyl and 9.62 kg of potassium chloride as a water-soluble solid carrier were used in the same manner as in Example 4 to complete the pesticide preparation.

Experimental Example 1

1. Diffusion test of underwater emulsion type granule by distance

After dividing the rice paddy 10m before 10 days treatment was divided into 1m in width, 20m in length to adjust the freshwater depth to 5cm and spray each 20g of the pesticide preparation prepared in Examples 1 to 8 to the central point of the treatment, 3 After 24 hours, the diffusivity of the pesticides was tested from the surface at distances of 0 m (treatment point), 1 m, 3 m, and 5 m. Water was collected at four points within 1 cm, and the average value of the results of analyzing and analyzing the pesticide active ingredient in the water sample is shown in Table 1 . In this case, the theoretical concentration of metamipope in Examples 1 to 4 was 0.2 ppm, and in Examples 5 to 8, the theoretical concentration of chlorpyriphosmethyl was 0.6 ppm.

Diffusion Test Results Over Time division Common name of the active ingredient Active ingredient concentration by distance (ppm) 3 hours 24 hours 0m 1m 3m 5 m 0m 1m 3m 5 m Example 1 Metatamif 0.20 0.18 0.18 0.17 0.18 0.17 0.18 0.18 Example 2 0.21 0.18 0.17 0.17 0.18 0.18 0.17 0.18 Example 3 0.21 0.19 0.18 0.16 0.17 0.19 0.18 0.18 Example 4 0.22 0.18 0.17 0.17 0.17 0.17 0.17 0.17 Example 5 Chlorpyrifos-methyl 0.61 0.61 0.59 0.56 0.57 0.58 0.58 0.56 Example 6 0.64 0.60 0.60 0.55 0.58 0.59 0.58 0.56 Example 7 0.65 0.61 0.58 0.57 0.58 0.55 0.57 0.57 Example 8 0.64 0.60 0.59 0.56 0.57 0.56 0.58 0.57

As shown in the results of Table 1 above, when the pesticide preparation of the present invention at any position of the pharmaceutical treatment, the pesticide active ingredient was uniformly distributed after 3 hours. Furthermore, even after 24 hours, the pesticide active ingredient was distributed uniformly. These results disperse in all directions at a relatively high rate due to the action of the surfactant and the dissolution of the water-soluble carrier in water, and as the pesticide active ingredient mixed therein is eluted at the dispersed point, the pesticide granules are uniformly distributed over the entire field. The pesticide effect can be obtained by dispersing. Therefore, the pesticide granules of the present invention are emulsified pesticides in water.

2. Drug test for blood

After filling each of the semi-circular pipe ports 10 cm wide x 10 cm high, each loam soil was seeded and sown with rice and blood at 50 cm intervals, and then filled with fresh water depth of 5 cm on the 10th day. The aqueous emulsified pesticide preparation prepared in Example 4 or the medicament of Comparative Example 1 was treated. The efficacy of the drug was averaged by evaluating the control effect on blood at 40 days after treatment and as a percentage. The results are shown in Table 2 below.

Drug test results by distance from drug treatment site division Control effect (%) 0m 1m 3m 5 m 7m 10 m Example 1 100 100 100 100  99  95 Example 2 100 100 100 100 100  92 Example 3 100 100 100 100 100  96 Example 4 100 100 100 100 100  94 Comparative Example 1 100  98  90  85  70  64

As shown in the above Table 2, during the spraying treatment of the emulsified agrochemical pesticides of the present invention, it is possible to obtain a very good control effect on the blood within a range of 10m from the drug treatment point, the active ingredient is evenly dispersed It was confirmed that it is possible to provide a composition capable of excellent drug expression as a whole.

3. Drug test for rice weevil

After rice transplanted into rice fields divided into 10m width and 10m length, the freshwater depth was filled with 5cm on the 10th day, and the water-emulsified granular composition prepared in Examples 5 to 8 was treated at one end of the treatment section. 2 drugs were diluted and then foliage treated. Judgment of the drug efficacy in the test group treated with the pesticide preparation of each Example and the drug of Comparative Example 2 on the 50th day after the drug treatment, the larvae in the rice roots were investigated and compared with the larvae in the untreated group to calculate the control effect.

Drug test results by distance from drug treatment site division Control effect (%) 0m 1m 3m 5 m 7m 10 m Example 5 87.6 88.0 86.6 83.0 80.5 81.4 Example 6 85.6 88.3 82.5 81.6 81.0 82.1 Example 7 90.6 92.5 95.3 89.5 90.1 91.1 Example 8 85.0 86.0 80.0 81.0 87.0 78.0 Comparative Example 2 87.8 86.5 82.3 90.0 88.1 85.3

4. Test against rice

After rice transplanted into rice fields divided into 10m width and 10m length, fill the freshwater depth with 5cm on the 10th day, the underwater emulsified pesticide granules prepared in Examples 1 to 8 and Comparative Example 1 and at one end of the treatment The drug of Comparative Example 2 was treated according to each treatment method. Judgment of the weakness was carried out by visual inspection of rice mortality and inhibition of growth on the 5th and 15th day after drug treatment, and classified into 10 grades from 0 (no harm) to 9 (complete test).

Test results of weakness by distance from drug treatment point division Weak Day 5 Day 15 0m 3m 7m 10 m 0m 3m 7m 10 m Example 1 One 0 0 0 0 0 0 0 Example 2 One 0 0 0 0 0 0 0 Example 3 One 0 0 0 0 0 0 0 Example 4 One 0 0 0 0 0 0 0 Example 5 0 0 0 0 0 0 0 0 Example 6 0 0 0 0 0 0 0 0 Example 7 0 0 0 0 0 0 0 0 Example 8 0 0 0 0 0 0 0 0 Comparative Example 1 One 0 0 0 One 0 0 0 Comparative Example 2 One 0 0 0 One 0 0 0

As shown in Table 3, the treatment of the emulsified aquatic pesticides of the present invention, when compared to the drug of the comparative example was also obtained in the weak against rice, slightly weak at the treatment point 5 days after treatment Appeared but all recovered.

5. Storage stability test with time

In order to measure the change over time of the active ingredient of the pesticide, about 50 g of silver emulsified pesticide preparation prepared in Examples 1 to 8 were put into a silver foil bag used for packing a conventional powdered pesticide, and sealed to 40 ±. Samples were taken over time by storage in a thermostat maintaining a temperature of 2 ℃, quantitative analysis for each component according to the conventional pesticide process analysis method is shown in Table 5 the results.

Storage stability test results with time division Common name of the active ingredient Active ingredient decomposition rate (%) 0 hours 4 Weeks 8 Weeks 12 Weeks Example 1 Metatamif 0.0 0.0 0.0 0.1 Example 2 0.0 0.0 0.1 0.1 Example 3 0.0 0.0 0.0 0.1 Example 4 0.0 0.0 0.0 0.1 Example 5 Chlorpyrifos-methyl 0.0 0.0 0.0 0.0 Example 6 0.0 0.0 0.0 0.0 Example 7 0.0 0.0 0.0 0.0 Example 8 0.0 0.0 0.0 0.0

In view of the results shown in Table 5, the water-in-oil emulsified pesticide preparation of the present invention does not significantly affect the pesticide active ingredient even after long-term storage for more than 12 weeks at 40 ℃, which is the highest temperature of summer in Korea. As a result, it was confirmed that there was no problem in the commercialization and storage.

As described above, the present invention provides a stable underwater emulsified pesticide granules that are superior to the control agent in terms of diffusion properties, medicinal efficacy, and weakening of the active ingredient of the pesticide and have little change over time.

Furthermore, the emulsified underwater pesticide formulation of the present invention exhibits excellent control effect even when a suitable amount of drug is treated at a certain point due to its excellent diffusibility, so that there is no risk of pesticide poisoning of workers, and it can be easily used because it can be viable. In addition, by reducing the amount of solvent used, it provides an environmentally friendly effect to minimize environmental pollution.

In addition, the present invention provides a pesticide treatment pesticide preparation for facilitating the application of the pesticide by packaging the water-based emulsifying pesticide of the present invention in a water-soluble film bag to be used by throwing an appropriate amount per predetermined area.

Although the present invention has been described in detail only with respect to the embodiments described, it will be fully understood by those skilled in the art that various modifications and changes can be made within the technical spirit of the present invention.

Claims (9)

0.1 to 10% by weight of the pesticide active ingredient, 5 to 15% by weight solvent, 0.1 to 3% by weight surfactant, 0.5 to 2% by weight binder, 0 to 25% by weight auxiliary solid carrier and 45 to 94.3% by weight Underwater emulsifying type agricultural chemical pesticide comprising a water-soluble solid carrier of. The water-in-oil emulsified pesticide granules according to claim 1, wherein the solvent is an ester organic solvent. 2. The salt of claim 1 wherein the surfactant comprises a sulfonate consisting of an alkyl sulfonate and a dialkylsulfonate, or a succinate consisting of an alkylsulfosuccinate, a bis (alkyl) sulfosuccinate, and a sulfate salt comprising an alkyl sulfate. The emulsified type pesticide in water, characterized in that the alkyl group of C ₆ ~ C ₁₂ or a single form or a mixture thereof selected from the group consisting of. According to claim 1, wherein the binder is water-soluble starch, dextrin, carboxymethyl cellulose, sodium polyacrylate and xanthan gum selected from the group consisting of two or more of the above emulsified emulsified pesticide in water. According to claim 1, wherein the auxiliary solid carrier is an emulsified type agrochemical granules of the water, characterized in that the single or a mixture of two or more selected from silicon dioxide, bentonite and white carbon. The water-soluble solid carrier of claim 1, wherein the water-soluble solid carrier is a single or a mixture of two or more selected from an inorganic salt consisting of ammonium sulfate and potassium chloride. 1) mixing and kneading 0.5 to 2 wt% binder, 0 to 25 wt% auxiliary solid carrier and 45 to 94.3 wt% water soluble solid carrier to prepare a solid phase; 2) manufacturing a granule (Core Granule) by extruding the solid part using a granulation machine; 3) preparing a liquid phase by dissolving 0.1 to 10% by weight of the pesticide active ingredient in 5 to 15% by weight of an ester organic solvent and mixing 0.1 to 3% by weight of a surfactant; And 4) A method for producing an emulsified underwater granules, comprising the steps of uniformly spraying and drying the liquid phase onto the granular matrix. The method according to claim 7, wherein the auxiliary solid carrier is in the form of a single or a mixture of two or more selected from silicon dioxide, bentonite and white carbon. 8. The method according to claim 7, wherein the water-soluble solid carrier is in the form of a single or a mixture of two or more selected from inorganic salts consisting of ammonium sulfate and potassium chloride.