KR100313133B1 - Large size granular pesticide formulation for paddy rice - Google Patents

Abstract

The present invention relates to a granular medium-large-scale granular pesticide for non-floating rice (rice), which makes it easy to select the surface coating treatment and the type and amount of the fixing agent during granulation molding so as to control the elution rate of slow-release and fast-acting.

The granular medium-to-large granular pesticide of the present invention blends pesticide components and auxiliaries with an extender, which is a clay mineral, and uses a fixing agent to produce 1.0-5.0 mm of circular particles in a rotary granulation machine. And spraying with power granule spreader to increase the scattering distance and spread evenly when spraying with the power granule spreader, and by making the granule size into medium-large sized granules, it is easy to select the surface coating treatment and the type and amount of fixing agent. It relates to the formulation of pesticides that can control the dissolution rate of fast-acting. It can be used together with fertilizer, so it is convenient to use, saves effort, and can be sprayed more evenly. It is a formulation that is environmentally friendly and improves user safety.

Description

Large size granular pesticide formulation for paddy rice}

The present invention relates to a granular medium to large granular pesticide for non-floating rice (rice). More specifically, the present invention provides a granular medium-large-sized granular pesticide for non-floating rice (rice), which makes it easy to select the surface coating treatment and the type and amount of the fixing agent during granulation, so that the dissolution rate of the slow-release and fast-acting agent can be controlled. It is about.

Today, stable agricultural production is largely driven by the development of pesticides. It is true that the development of effective new pesticides played an important role in the development of the pesticide industry, but the development of formulations also contributed to the improvement of drug efficacy, reduction of weakness, increased safety, and convenience of use. Most of the early pesticides were liquid reagents sprayed using a nebulizer with hydrating agents or emulsions, but now various formulations have been developed, and a total of 34 different types of pesticides, including sleep-developing and jumbo agents, have been developed. It is manufactured and sold (Pesticide Use Guidelines, 1999, Pesticide Industry Association).

Most of the pesticides currently used in rice crops are granulated pesticides, which have greatly improved the ease of use, such as reduced application effort, compared to liquid reagents. Contributes greatly. However, most granulated pesticides are fine granules of 1mm or less, which is difficult to mix with fertilizers, so it is inconvenient to give fertilizers and pesticides separately, and it is impossible to use fertilizers that have already been developed. . The reason why the mixing of fertilizers and pesticides is impossible is that the fertilizers are medium grains of 1-4 mm, whereas most of the pesticides are fine grains of 1 mm or less, and the particle sizes are different from each other (Table 1).

Particle Distribution Ratio of Pesticides and Fertilizers division Particle size (mm) Remarks 4mm or more 2-4mm 1-2mm Less than 1mm Compound Fertilizer (21-17-17) 3.6 59.8 34.7 2.0 Dongbu Hannong Chemical Yongsung 9.9 60.5 26.0 4.2 Dongbu Hannong Chemical Duckling (coated mouth) 0 0 9.8 90.2 Novartis Grape colon (extrusion granulation) 0 0 2.8 97.2 Novartis

Fertilizers and pesticides of different particle sizes are difficult to use together because they do not mix evenly with each other, and the scattering distances during spraying are also different.

Experimental how well the fertilizer and pesticides can be mixed together is shown in Table 2 below.

The degree of particle mixing in the container when mixing pesticide and fertilizer (Unit:) division Particle size (mm) Remarks More than 2mm 1-2mm Less than 1mm difference 44.3 35.0 20.7 down 42.0 34.0 24.0 * Mix 700g (800ml.) Of complex fertilizer (21-17-17, Eastern Hannong) and 215g (200ml.) Of mackerel and mix it for 20 seconds with a shaking width of 4.5cm and a speed of 30 times / 10 seconds. Investigate separated by lower 500ml.

As can be seen from the above, the small particles have a property of gathering downward, so that the distribution ratio of the fine particles in the upper portion of the container and the lower portion of the container is high. This confirms that pesticides with small particle sizes can be collected under the container in the agricultural field, causing uneven spraying.

The results of examining the scattering distance during the application of fertilizers and pesticides are shown in Table 3 below.

Distance Distribution of Fertilizer Pesticides by Power Sprayer (Unit:) Distance from the atomizer (cm) Assembled Pesticides Sand-covered Pesticides Compound Fertilizer (21-17-17) Yongsung 0 to 52 25.8 11.6 11.9 13.4 52 to 104 22.7 28.2 13.2 15.9 104-156 14.7 16.9 11.2 20.4 156-208 11.2 15.0 13.4 10.8 208-260 7.9 11.6 12.4 10.5 260-312 6.4 8.2 10.7 8.8 312-364 4.4 5.3 10.1 6.8 364-416 2.8 2.1 6.3 4.0 416-468 2.0 0.8 5.1 3.7 468-520 0.8 0.3 2.5 2.0 520 or more 1.2 0.0 3.2 3.7 * Tested with a fixed power spreader (Sungjin) at 63cm height. ** See Table 1 for pesticides and fertilizers.

As a result, it was confirmed that the fertilizers, which are alleles, fly relatively far and are uniformly sprayed, whereas the finer pesticides are sprayed only at the shorter distance and nearer the scattering distance. In fact, fertilizers were sprayed at 56-63 at a distance of 1.56m from the sprayer, whereas pesticides were sprayed at 56-63, and only 16-18 were sprayed at a distance of 21-38 at a distance of more than 2.60m.

The disproportionate application of these fertilizers and pesticides appeared more severely when they were mixed together and the results are shown in Table 4 below.

Distribution of Fertilizer Pesticides by Power Sprayer by Distance (Unit:) Distance from the atomizer (cm) Power Saver ¹⁾ Manpower ²⁾ 2.0 mm or more 2.0 mm or less 2.0 mm or more 2.0 mm or less 0 to 52 15.4 18.8 13.3 20.3 52 to 104 16.5 25.4 11.7 15.5 104-156 15.4 31.8 10.7 19.5 156-208 12.2 10.7 12.3 19.2 208-260 13.5 8.4 10.2 13.9 260-312 10.5 2.5 11.1 6.7 312-364 7.9 1.3 6.4 3.9 364-416 3.8 0.5 7.8 0.6 416-468 3.0 0.3 6.6 0.4 468-520 1.1 0.3 6.6 0.0 520 or more 0.8 0.0 3.2 0.0 1) Fixed and tested the multi-purpose power spreader (Seongjin) at 63cm height. 2) Experienced farmers spread evenly to the distance of 0-5m from the fixed position of the starting point.3) Since fertilizers used particles larger than 2.0mm, , More than 2mm was tested with fertilizer and less than 2mm.

As seen above, pesticides were sprayed 28.7 more at a distance of 1.56 m than the fertilizer, but 22.2 less at a distance of 2.60 m or more. Fertilizers and pesticides were mixed and applied by manpower, in which case disproportionate spraying was more pronounced depending on the particle size. In this case, it was thought that the particle separation occurred in the hand when picked up by hand, and that the pesticides were mainly given in the near distance when spraying at a long distance. This disproportionate application of fertilizers and pesticides is more severe when the wind is acting on the actual site, making it difficult to mix fertilizer and pesticides.

In view of the above results, mixed use of pesticides and fertilizers is difficult in practice, and it is judged that when mixed, in particular, the inequality application of pesticides does not provide sufficient efficacy or partial damage.

In addition, fine grain pesticides are fine particles of less than 1mm and contains a lot of powder, which is easy to be blown by the wind and therefore inconvenient to use, and also cause skin problems or user inhalation through respiratory organs. In order to make up for the shortcomings of these powders or granulated pesticides, granular pesticides have been developed and distributed in the case of hydration (Pesticide Use Manual, 1999, Pesticide Industry Association), but non-floating pesticides used in rice fields have not been developed yet. Although there are studies of granules (Patent Publication No. 96-6761) that contain low-float water-floating substances such as pearlite by Nakayama, etc., and are decomposed and dispersed on the surface of the water, it is easily driven to one place by wind or the like. There is a drawback that it is not practical.

Another drawback of granular pesticides is that it is difficult to develop long lasting pesticides. Sustained pesticides with improved sustainability have many advantages, such as saving resources, improving control effects, and environmental conservation effects. In the case of fertilizers, studies on slow-fertilizing fertilizers coated with actual polymer compounds and the like (Patent Publication Nos. 86-8960, 96-22408, 97-64372) are in practical use.

In the case of pesticides, studies using polymer membrane material, microbial biodegradable polymer compound, porous material, adsorptive carriers, etc. (Refer to Pesticide Preparation Guide, 1997, Japan Plant Protection Association., Future trends in pesticide formulation, 1995, A. Smith (PJB Publication Although many) are being made, except for the fact that the microcapsule hydration has been put to practical use (Pesticide Formulation Guide, 1997, Japan Plant Protection Association), there is no significant research achievement to date.

In the case of granular pesticides mainly used in rice crops, the dissolution rate is controlled by the kind of extender, the type and amount of fixing agent, and it is being used as a technique for controlling the dissolution rate and reducing the weakness. to be. This is because the particle size of the currently used granules is too small to control the dissolution rate. In the case of medium to large granules of 1-5 mm, the techniques applied to fertilizers or the above-described slow-release particle manufacturing techniques can be easily applied. The important problem to be solved in the development of granular pesticides is that the pesticides are rapidly distributed to the rice fields because of the effect of the fixing agent used for shaping, slowing the disintegration of the particles, dissolution of the pesticides, or limiting the number of particles per unit area. It must be spread. In Japan, in order to solve this problem, water-floating granule pesticides (Patent Publication Nos. 96-6761 and 96-6763) using pearlite have been developed. However, as described above, these floating particles are easily removed by wind. There is a drawback to gathering. However, the use of hydrophilic binders such as starch, dextrin, CMC, starch syrup, etc., can easily produce fast disintegrating granules of water, and the characteristics of the adhesives and the surface coating treatment of the pesticide component dissolution rate of granule pesticides vary depending on the disintegration rate. We will be able to develop sustainable pesticides using our technology.

Improving the formulation of pesticides has greatly contributed to the development of agriculture by saving resources, increasing drug efficacy, reducing the effects of environmental conservation and efforts. In fact, granulated pesticides used in rice cultivation have a great effort-saving effect when spraying, which is a formulation commonly used in most farms. However, these granules have much room for improvement in many respects as described above.

Therefore, the present invention has been devised based on the above facts, and an object of the present invention is to develop a pesticide that is more convenient and safer, and can be mixed well with fertilizer and evenly sprayed together, thereby reducing effort during spraying. To develop a formulation. Another object of the present invention is to increase the particle size in the molding process of granular pesticides, thereby making it easy to control the type and amount of extender, fixing agent and surface coating treatment, and thus to develop a slow-acting pesticide that can control the dissolution rate of pesticide components. It is.

Figure 1 shows a granular pesticide according to the particle size of the present invention.

Figure 2 shows the results of comparing the size of the granulated pesticides and fertilizers of the present invention.

Hereinafter, specific configurations and functions of the present invention will be described in detail based on the following examples and use examples, but the following examples are not limited to the field of the invention.

Granular pesticides commonly used in rice crops have had much room for improvement in lighting, which is difficult to mix with fertilizer. In order to make up for the shortcomings of granular pesticides, which are mostly 1 mm or less, 1-5 mm medium-large granular pesticides have been developed. First, the products of pesticide particles of various sizes were prepared (FIG. 1), and the size of the particles that could be given evenly when sprayed with a fertilizer using a sprayer was examined.

The overall tendency was to spray near the sparger if the particles were small and relatively far if the particles were large. As a result of this experiment, fine particles of less than 1.0mm showed similar spraying range as granulated pesticide, making it difficult to mix with fertilizer. And, if less than the size of the particles in the spray range of 5mm and fertilizers showed no significant differences were not evenly mixed when mixed with fertilizers, especially if they use the mouth of 3kg Jane m 25 ribs per ^second (grain weight 12.7g / 100 lip Due to the internal and external period, problems such as drug efficacy and weakness may occur. As a result, the particle size of the granular pesticide of the present invention is preferably up to 1.00-5.00 mm.

Spreading Distribution of Particles of Different Sizes When Using Pesticide by Power Sprayer (Unit:) Distance from the atomizer (cm) Blowjob party size 0.5 to 1.0mm 1.0-2.0mm 2.0 ~ 4.0mm 4.0 ~ 5.0mm 5.0mm or more 0 to 52 18.1 12.5 11.5 9.0 7.2 52 to 104 25.2 17.0 15.0 13.7 13.4 104-156 15.1 15.9 11.8 13.0 11.8 156-208 13.1 10.2 12.6 16.0 13.4 208-260 9.1 11.7 13.1 15.7 14.4 260-312 8.2 10.2 11.2 10.3 10.3 312-364 5.0 9.5 10.0 10.0 9.6 364-416 4.0 7.0 6.7 6.2 8.9 416-468 1.6 4.0 5.5 3.7 6.9 468-520 0.6 1.9 2.6 2.4 4.1 * Tested by fixing the multi-purpose power spreader (Sungjin) to 63cm height.

Preparation of medium and large granular pesticides

The medium and large granular agrochemicals of the present invention are manufactured using granulators, which are made from clay mineral extenders, fixatives, and auxiliary pesticides, which can be produced as fast-acting or long-lasting products. Same as

1) Manufacturing method of fast-acting granulated pesticide

-material

Pesticide Ingredients: Pesticide Active Ingredient

Extenders (carriers): Sesa, diatomaceous earth, Kaolinite, Bentonite, etc.

Fixing agent:

Hydrophilic: starch, dextrin, CMC, starch syrup

Non-hydrophilic: glycols, paraffins, polyvinylacetates,

Polyvinyl alcohol, etc.

Auxiliaries: surfactants, blowing agents, etc.

-Using the above materials, molding of granules is carried out in the following order.

First, the clay mineral extender and pesticide raw material are mixed well by grinding or liquid dilution (A).

Second, prepare an aqueous solution of diluting the fixing agent and auxiliaries (B). Since the required amount of this aqueous solution (B) is about 20 of the extender, the concentration of the solution is adjusted in advance so as to be the content of the target fixing agent and the auxiliary agent in the final product.

Third, granule particles are prepared by adding an appropriate amount of extender (A) and an aqueous solution (B) using a rotary granulator (eg, a ball granulator, Fuji Q-7000V, Japan).

Fourth, the size of the molded particles is prepared in 1-5mm, and used to dry the prepared granules.

In addition, if necessary for the preparation of fast-acting pesticides

1. mainly using hydrophilic substances as a fixing agent, or

2. First, make granules that do not contain pesticides and coat the pesticides on their surface,

3. Make granules that do not contain 1 / 2-4 / 5 sized pesticides of the final granules, and coat them with the extender containing the active ingredient with a very hydrophilic fixing agent only in the remaining 1 / 5-1 / 2 outer skin parts. Can be.

Example. 1: cabofuran (insecticide) granules (3kg / 10a products)

-Manufacturing prescription

Cabofuran original 3.5

EP4C 2.5

Dextrin 1.5

STPP 3.0

Bentonite 25.0

Talc balance

Manufacturing process

Follow the granulation molding process.

Example 2: Butacro (herbicide) granules (3kg / 10a formulation)

-Prescription

Butachlor Original 6.0

NK-EP4C 2.5

Dextrin 1.5

STPP 3.0

Bentonite 25.0

Talc balance

Manufacturing process

Follow the granulation molding process.

2) Manufacturing method of granular granular pesticide

-Manufacturing prescription:

Pesticide Ingredients: Pesticide Active Ingredient

Extenders (carriers): Sesa, diatomaceous earth, Kaolinite, Bentonite, etc.

Fixing agent:

Hydrophilic: starch, dextrin, CMC, starch syrup

Non-hydrophilic: glycols, paraffins, polyvinylacetates,

Polyvinyl alcohol, etc.

Auxiliaries: surfactants, blowing agents, etc.

-Manufacturing method

Slow-acting pesticides are prepared using a weak hydrophilic binder, which adjusts the dissolution rate according to the type or amount of binder. If necessary, it can also be produced using techniques used in the manufacture of slow-release fertilizers that coat PVA on the skin.

-Method using a fixing agent

By controlling the type and amount of the fixing agent in the manufacturing process of the fast-acting granules to prepare a pesticide with controlled dissolution rate and degree of hydrolysis. The dissolution rate varies depending on the type of pesticide, so this should be taken into consideration.

-By surface coating

It is a method of producing a slow-acting fertilizer by coating a water-insoluble low melting point polymer compound, a sulfur compound, or a silicic acid compound on the surface of a molded granular pesticide.

Practical examples of the present granule pesticides in the agricultural field are as follows.

Use Example 1: Underwater disintegrating granular pesticide

Granules with a diameter of 1.0-5.0 mm using an extruder and a rotary granulator by adding an active ingredient, an extender, a fixing agent (mostly a hydrophilic Dextrin, etc. as a fixing agent to improve the disintegration in water), and other auxiliary agents. It is easily disintegrated in water and molded in a mold, so it is fast to dissolve pesticides. In this case, first, the granules do not contain 1/2 to 4/5 of the pesticide, and may be prepared by including the necessary ingredients such that only the remaining 1 / 2-1 / 5 outer shell has great water disintegrability.

Use Example 2: Coated Granular Pesticide

In the use example 1, the pesticide which produced the granule which does not contain the main ingredient (active ingredient) first, and coat | covered the active ingredient with the adjuvant on the surface.

Use Example 3: Granular Sustainable Granule Pesticide

As in the use example 1, granules are prepared, wherein the dissolution center of the pesticide component is 5-20 days after the treatment by adding polyvinyl alcohol, which is a weak hydrophilic agent, and the like.

Use Example 4: Coated Sustainable Granule Pesticide

Granules were prepared as in Example 1, coated with a water-insoluble low melting polymer compound, and prepared to have a dissolution center of 5-20 days.

Use Example 5: Combination Sustainable Granule Pesticide

A sustained pesticide was prepared as in Examples 3 and 4, and the pesticide was coated as in Example 2, thereby increasing the initial dissolution amount.

Use Example 6: Persistent Granular Pesticides-Perennial and Perennial Herbicides

A mixture of annual herbicides (A) and perennial herbicides (B) is used as a perennial herbicide (B) in the same manner as in Example 1 to make a slow-acting granule having a dissolution center of 7 days and thus using the annual herbicide (A) Surface cover as shown in 3. However, at this time, a part of the amount of perennial herbicide (B) may be used for surface coating, and the annual herbicide (A) may also be included in the preparation of the slow-release granules.

Medium and large granular pesticides of the present invention can be used by mixing the fertilizer, and can be sprayed at the same time with the pesticide using a fertilizer spreader is convenient to use and has the effect of greatly reducing the pesticide use effort. In addition, the present invention can be evenly sprayed the drug in the actual agricultural field can improve the drug efficacy, and easy to use the extender or fixing agent for controlling the dissolution rate can reduce the weakness caused by excessive dissolution amount and sustainability It is effective to develop pesticides. In addition, the present invention can reduce the environmental pollution by providing a medium-large sized granule pesticide that does not blow in the wind, it is possible to reduce the skin contact or inhalation through the respiratory tract environmental conservation, the effect of providing a medium-sized granule pesticide with improved user safety There is.

Claims (3)

A non-floating medium-large sized granular pesticide with an adjustable dissolution rate of the active ingredient prepared by adding an auxiliary agent such as a pesticide raw material, a fixing agent, a surfactant, and a foaming agent using the clay mineral as an extender, and forming the particle size in the granulation machine to 1.0-5.0 mm. . The non-floating medium-large-scale granular pesticide according to claim 1, wherein the dissolution rate of the active ingredient is controlled by adjusting the type and amount of the fixing agent in the granulation process. The non-floating medium-large size granule pesticide according to claim 1, wherein the dissolution rate of the active ingredient is controlled by performing a surface coating treatment during the molding of the granules.