KR100735278B1 - Controlled Release Pesticide Formulation - Google Patents

Abstract

The present invention relates to a pesticide preparation in which a pesticide is contained in various types of biodegradable polymers such that organic or inorganic substances are released in an effective amount for a desired period of time, wherein the biodegradable resin is 10 to 90% by weight, organic or inorganic is 90 to 10% by weight. The composition containing the% and the pesticide is characterized in that it is molded into a strip or plate after compounding. This pesticide formulation keeps the effects of pesticides by slowly dissolving the resin and releasing the pesticides in a single treatment, and is used for pest control of various flowers and crops grown in homes, small gardens, and facility houses. Diluent It can solve the risk of pesticide poisoning to workers due to the scattering of pesticides, which is a problem of pesticides, the trouble of spraying pesticides multiple times and the environmental pollution caused by excessive pesticide spraying, and the biodegradable resin used in pesticide manufacturing Complete degradation in the soil can lead to the development of environmentally friendly pesticides.

Description

Controlled Release Pesticide Formulation             

1 is a graph showing the decomposition rate of controlled release pesticide preparation according to the starch addition ratio

2 is a graph showing the decomposition rate of the controlled release pesticide preparation according to the calcium carbonate addition ratio

3a to 3c are photographs taken by the degradation of the controlled release pesticide formulations by days

Figure 4 is a photograph of the rose aphid control effect of the controlled release pesticide preparation

The present invention relates to a pesticide formulation on a sheet or plate which allows the pesticide component to be released in the soil in a desired effective amount.

Conventionally, pesticides used in home and facility horticultural pest control have to be sprayed in excessive amounts several times before the pesticide effect can be seen. However, spraying excessive amounts of pesticides may adversely affect other crops, may cause pesticide poisoning to the human body, may cause environmental pollution, and spraying pesticides is cumbersome and requires excessive labor. There was a problem.

In addition, the development of pesticide formulations can lead to various types of pesticide formulations, taking into account the characteristics of pesticides, the period of crop cultivation, the lifestyle of the pests to be controlled and the timing of control. However, most of the pesticide formulations currently in use are fast-acting diluent pesticides or solid-type pesticides such as granules or powders that are directly applied to the soil, and it is cumbersome to spray them several times during the growing season. This can bring side effects such as pesticide poisoning to workers. In addition, the occurrence of pests is a lot of changes depending on the environmental conditions, there is a problem that must be sprayed pesticide whenever a pest occurs.

In an attempt to solve this problem, Japanese Patent Application Laid-open No. Hei 6-116103 proposes to inject a biodegradable resin into a plate and then dissolve the pesticide in a solvent and then introduce it into the resin plate. A method of copolymerizing agrochemicals and polyesters with an acid, dissolving in chloroform, adsorbing to granular zeolite, heating and evaporating chloroform is shown. However, these conventional pesticides are pointed out as a problem in that the manufacturing method is complicated and the manufacturing environment is harmful and the manufacturing cost is high due to the use of acid and solvent in the manufacturing.

In Korea Patent Application No. 96-57351, in order to solve this problem, an effective amount of biodegradable aliphatic polyester is compounded to produce a plate-shaped mold, but the cost of resin is high, which lowers the economic efficiency. This is difficult to control because of the long and the pesticide is accumulated in the plant for a long time has the disadvantage of difficult to expand the applied crop.

In addition, Korean Patent Application No. 99-23144 prepared biodegradable polymers and pesticides in the form of pins by compounding them with organic / inorganic additives such as starch and calcium carbonate. There is a need to solve the problem of accumulation in plants.

Biodegradable resins and additives to reduce the economic burden on the use of pesticides and to minimize the side effects of using pesticides, such as environmental pollution due to excessive pesticide spraying, pesticide poisoning accidents caused by scattering of pesticides when spraying pesticides In order to improve the shortcomings of the conventional controlled release pesticide formulations, it is to develop a pesticides or plate-type pesticides for safety vitality.

In particular, we will provide a method to control the release rate of pesticides by freely controlling the decomposition period of subsidiary materials used in the manufacture of pesticides in consideration of pest incidence and crop cultivation period.

Therefore, the present invention can see the pesticide effect for a desired period by treatment once a year in consideration of various types of crops and different pest occurrence situation, the pesticide is released by the amount necessary for pest control damage caused by abuse of pesticides It is an object of the present invention to provide an economical new pesticide formulation that can be reduced and suitable for use in pots and is easy to manufacture.

In order to solve the above problems, the present inventors compounded biodegradable resins and pesticides and organic / inorganic materials that can be completely decomposed in a natural environment, and then prepared in rows or plates to decompose according to an appropriate blending ratio of the resins and additives. The difference was confirmed, and the actual field test showed that the release period and degradation of pesticides could be freely controlled for at least 1 to 12 months. That is, it was confirmed that the difference in composition and additives of the biodegradable resin and the resulting crystallinity change can control the decomposition rate of the controlled release pesticide preparation. In addition, it has been found that it is possible to freely control pests harmful to crop cultivation by producing various pesticides according to the occurrence of pests.

Therefore, according to the present invention, (a) biodegradable resins and (b) organic or inorganic additives are contained in a weight ratio of a: b = 1 to 9: 9 to 1 and contain pesticides, but the resin to pesticide mixture ratio is weight ratio. 50-99.9: A string or plate release controlled pesticide formulation is provided, characterized in that the composition of 50 to 0.1 is compounded and molded into a strip or plate.

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Hereinafter, the preferred embodiment of the present invention will be described in more detail.

Examples of preferred biodegradable resins for use in the present invention include at least one selected from the group consisting of dicarboxylic acids represented by the formula (1), their C ₁ to C ₃ alkyl esters and anhydrides as acid component monomers, and as alcohol component monomers. A thermoplastic polyester of formula (3) having a number average molecular weight of 10,000 to 100,000 and a melting point of 50 to 200 캜 prepared by polymerizing one or more diols of formula (2).

HO-C (O) -R ₁ -C (O) -OH

(In the above formula, R ₁ is a substituted or unsubstituted alkylene group having 0 to 30 carbon atoms.)

OH-R ₂ -OH

(Wherein R ₂ is a substituted or unsubstituted alkylene group having 2 to 20 carbon atoms)

-(OR ₂ -OCR ₁ (O) -C) _n -C (O)-

(Where n is a repeating unit and R ₁ and R ₂ are as defined in Formulas 1 and 2).

If the number-average molecular weight of biodegradable thermoplastic polyester is less than 10,000, the decomposition rate is too fast, so it is not suitable for continuous release effect and poor molding of the product.If the molecular weight exceeds 100,000, the decomposition rate When the melting point is less than 50 ° C., poor work and storage problems occur, and thermoplastic aliphatic polyester having a number average molecular weight of 10,000 to 100,000 and a melting point of 50 to 200 ° C. is preferable.

Although not particularly limited, the acid component monomers constituting the biodegradable aliphatic polyester include dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid and suberic acid, and their At least one selected from the group consisting of dicarboxylic acid alkyl esters such as methyl ester, ethyl ester and propyl ester or anhydrides of the above dicarboxylic acids is preferred. Among these, particularly preferable acid component monomers are one or more selected from the group consisting of succinic acid, adipic acid, methyl succinate, methyl adipic acid, succinic anhydride and adipic acid anhydride.

Preferred examples of the alcohol component monomer constituting the biodegradable aliphatic polyester are one or more selected from the group consisting of substituted or unsubstituted ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, heptanediol and octanediol. . In the case of substituted diols, lower alkyl groups and / or hydroxy groups are preferred as substituents. Especially preferred alcohol component monomers are ethylene glycol, 1,4-butanediol or mixtures thereof.

In addition, the biodegradable resin of the present invention includes a polyethylene glycol having a molecular weight of 500 to 20,000, sodium sulfoisophthalate, an ester thereof, or the like as a third component in addition to the above-described monomers.

Polyfunctional polyhydric alcohols and / or polyfunctional carboxylic acids used as a crosslinking agent may be used to prepare and polymerize them. Examples thereof include glycerin, trimethylolpropane, pentaerythritol, and trimellitic acid ( trimellitic acid), pyromellitic acid, etc. may be used, but is not particularly limited.

The coupling agent may also be used, and may include isocyanates, oxazolines, epoxides and the like.

In addition, polybutylene succinate, polybutylene succinate adipate copolymer, polycaprolactone, polylactide, polyamide copolymer and aromatic / aliphatic copolymer may be used alone or in combination. And suitable resins may be selected to suit the decomposition rate, and the object of the present invention is not limited to specific resins.

In addition to biodegradable resins and pesticides, organic or inorganic substances are added to the preparations of the present invention in order to control the decomposition rate and the dissolution rate. The amount of organic or inorganic substance (b) added is 9: 1 to 1: 9, preferably 7: 3 to 3: 7, in terms of weight ratio (a: b) to biodegradable resin (a). In this case, when the content of the resin is less than 1, the workability is poor, and when it exceeds 9, there is a problem that the decomposition rate is lowered.

The organic or inorganic additives of the present invention are organic group consisting of starch, cellulose, lignin, chitin and chitosan, and calcium carbonate, titanium dioxide (TiO2), talc, alumina and clay (which may also be used as nucleating agents). It is preferably one kind or a mixture of two or more kinds selected from an inorganic group consisting of clay), but is not particularly limited. In addition, all natural products or additives that can be used by common sense may be used.

Preferred examples of starch that can be formulated in the formulation include corn, rice, tapioca, potatoes, rye, oats, wheat, high amylose starch with an amylose content of at least 25%, waxy starch and starch with 100% amylose. There is one or a mixture of two or more selected from the group consisting of derivatives.

Examples of starch derivatives include crosslinking of starch substituted with hydroxy ethyl starch, hydroxy propyl starch, acetate starch, oxidized starch, acid treated starch, positive starch, negative starch, compound having a double bond.

In addition, the present invention is characterized in that the release period (month) of the pesticide formulation satisfies the following equation (1) and / or (2) according to the addition amount of the organic and / or inorganic additives.

Release period (months) ≤ -0.10 × Addition of organic matter (% by weight) + 8

(The addition amount of the organic material in Equation 1 is 20 to 60% by weight compared to the biodegradable resin.)

Release period (months) ≤ -0.15 × Addition of inorganic matter (% by weight) + 14

(In Formula 2, the amount of the inorganic substance added is 20 to 70% by weight relative to the biodegradable resin.)

The present invention can shorten the release period by adding organic / inorganic materials, and can effectively release an effective amount of pesticide for a desired period.

In the present invention, the pesticide compounded with the biodegradable resin should be considered the following physicochemical properties of the active ingredient of the pesticide.

In terms of physical properties, the properties of the compounded pesticide active ingredient can be used in powder or liquid form, and in chemical properties, the melting point of the active ingredient of the pesticide is 20-200 ° C., when heated to 100-250 ° C. There should be no decomposition of active ingredients by heat.

Examples of pesticides that satisfy these characteristics include pesticides such as acephate, carbofuran, diazinon, acetamiprid, imidacloprid, and propoxur. Disinfectants include dimethomorph, nuarimol, hymexazol, difenoconazole, triflumizole, procymidone, and the like. Herbicides include metrizin, paraquat, napropamid, and the like, and are not particularly limited.

In addition, the present composition may be blended with additives commonly formulated for plastic molding, such as lubricants, plasticizers, stabilizers, nucleating agents and the like.                     

Examples of suitable lubricants for blending into the composition include one selected from the group consisting of aluminum stearate, calcium, magnesium or tin salts, free acids, unsaturated fatty acid amides, waxes and N, N'-ethylene-bisstearamids, or There are two or more mixtures. The content of such lubricants in the present composition is 10 parts by weight or less, preferably 0.2 to 3 parts by weight, most preferably 0.5 parts by weight per 100 parts by weight of starch.

Examples of suitable plasticizers for blending into the composition include one or two selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, low molecular weight polyethylene oxide with a molecular weight of 1,000 or less, glycerin, polyglycerol, sorbitol and mannitol There are mixtures of species or more, of which glycerin or triethylene glycol are particularly preferred. The preferred amount of plasticizer is about 0.1 to 30%, preferably 0.5 to 20% by weight of the composition.

Phosphorus compounds are suitable as stabilizers. Phosphoric acid, phosphorous acid, trimethyl phosphate, hindered phenol-based iganox, etc. may be used. It is not particularly limited.

Hereinafter, an example of a method of molding the controlled release pesticide formulation according to the present invention will be described.

First, in consideration of the degradability and physical properties of the biodegradable resin, a master chip is prepared by blending an organic or inorganic substance with a resin, a lubricant and a plasticizer, and the master chip and one or two or more pesticides of the above characteristics and the rest of The biodegradable resin can be made into a strip-shaped sheet using an extruder equipped with a single or twin screw. Pesticide is preferably added so that the particle size is 10㎛ or less. In compounding, the temperature range of the cylinder varies depending on the melting point of the pesticide, but the temperature range of the cylinder portion is preferably 60 to 180 ° C. Pesticides having a melting point of less than 20 ℃, considering the coefficient of friction of the screw, since the actual cylinder temperature is 70 ℃ or more, there is a fear that carbonization and decomposition phenomenon occurs to lose the characteristics as a pesticide. The preferred mixing ratio of resin to pesticide excluding organic / inorganic is 50 to 99.9: 50 to 0.1, more preferably 90 to 99: 10 to 1 by weight. When the mixed weight ratio of the resin is less than 50% by weight, compounding is difficult and workability is poor, and when the mixed weight ratio of the pesticide is less than 0.1% by weight, the effect as a pesticide is inferior.

The present invention can vary the release rate of pesticides by changing the biodegradable resins and compositions in consideration of crop cultivation period, pest occurrence situation, side effects due to pesticide spraying, such as preventing pesticide poisoning and reducing environmental pollution It can provide a way to solve the problem.

On the other hand, considering the economic aspect, the price of biodegradable resin is expensive, which may provide a cause of raising the price of pesticide, but the price of pesticide products can be lowered by adding organic or inorganic substances such as starch in addition to biodegradable resin. Due to the fast decomposition rate, there are many advantages such as reducing environmental pollution and timely use of pesticides.

Features and other advantages of the invention as described above will become more apparent by the non-limiting examples described below. In the following examples, the molecular weight of the polyester is measured by gel chromatography (GPC) using chloroform as a solvent, and the melting point is measured by a differential scanning calorimetry (DSC) at a heating rate of 10 ° C. per minute. Melt flow index was measured at 2,160g, 190 ℃ based on ASTM D 1238.

Example 1

A polybutylene succinate adipate copolymer having a melting point of 90 ° C. and a melt flow index of 20 was mixed with 985 g of biodegradable polyester and 15 g of imidacloprid, mixed evenly, and melt-extruded to prepare a strip-shaped prototype having a thickness of 0.3 mm. Extruder cylinder temperature was maintained at 130 ~ 150 ℃ and the cooling was water-cooled to prepare a plate-shaped strip.

Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 2

The mixing ratio of polyester and starch was 8% by weight in the state excluding pesticide, and the same as in Example 1 except that the preparation efficiency of the prepared prototype, the degradation rate of the pesticide active ingredient over time, Degradability in soil, dissolution of the active ingredient in water and drug efficacy test results were measured and the results are shown in the following table.

Example 3

The mixing ratio of polyester and starch was the same as that of Example 1 except that the prototype was prepared by weighting 7/3 in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 4

The mixing ratio of polyester and starch was the same as that in Example 1 except that the prototype was manufactured by weight ratio of 6/4 in the state of excluding pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 5

The mixing ratio of polyester and starch was the same as that in Example 1 except that the prototype was manufactured by weight ratio of 5/5 in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 6                     

The mixing ratio of polyester and starch was the same as that of Example 1 except that the prototype was prepared by weight ratio of 4/6 in the state of excluding pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 7

It was the same as in Example 1 except that the prototype was prepared using polybutylene succinate biodegradable aliphatic polyester having a melting point of 114 ° C. and a melt flow index of 20. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 8

The mixing ratio of polyester and calcium carbonate was the same as that in Example 7 except that the prototype was manufactured by weight ratio of 8/2 in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 9

The mixing ratio of polyester and calcium carbonate was the same as that in Example 7 except that the prototype was prepared by weight ratio 7/3 in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 10

The mixing ratio of polyester and calcium carbonate was 6/4 by weight% in the state of excluding pesticide, and the same procedure as in Example 7 was carried out except that the prototype was manufactured. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 11

The mixing ratio of polyester and calcium carbonate was the same as that in Example 7 except that the prototype was manufactured by 5/5 by weight% in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Example 12

The mixing ratio of polyester and calcium carbonate was the same as that in Example 7 except that the prototype was manufactured by weight ratio 4/6 in the state of excluding pesticide. Formulation efficiency of the prepared prototypes, degradation rate over time of the active ingredient of pesticides, degradability in the soil, dissolution of the active ingredient of the pesticide in water and the results of the drug test were measured and the results are shown in the following table.

Example 13

The mixing ratio of polyester and calcium carbonate was the same as that in Example 7 except that the prototype was prepared by weight ratio 3/7 in the state excluding the pesticide. Formulation efficiency of the prepared prototype, degradation rate over time of the active ingredient of pesticides, degradability in the soil, the water dissolution of the active ingredient of the pesticide and the results of the drug test were measured and the results are shown in the following table.

Formulation Rate Evaluation of Prototype

About 5 g of each of the prototypes of Examples 1 to 13 was pulverized with a freeze crusher, and then accurately weighed a milled sample corresponding to 0.01 g as a pesticide active ingredient, and a 125 ml cap-stoppered Erlenmeyer flask. 10 ml of acetonitrile + H2O (1: 1, v / v) mixed solvent containing an internal standard solution (1000 ppm dimethyl phthalate) was added, followed by filtration. High Performance Liquid Chromatograph (HPLC) Analyzed. Formulation efficiency of the prototype was calculated by expressing it as a ratio of the pesticide injection rate at the time of manufacture, and the results are shown in Table 1.

division Formulation efficiency of prototype Insertion value (%) % Of analysis Formulation rate (%) Example 1 1.52 1.500 98.7 Example 2 1.52 1.469 96.7 Example 3 1.52 1.516 99.7 Example 4 1.52 1.520 100.0 Example 5 1.52 1.508 99.2 Example 6 1.52 1.500 98.7 Example 7 1.52 1.481 97.4 Example 8 1.52 1.504 99.0 Example 9 1.52 1.509 99.3 Example 10 1.52 1.520 100.0 Example 11 1.52 1.520 100.0 Example 12 1.52 1.489 98.0 Example 13 1.52 1.480 97.4

Pesticide Validation Test of Active Pesticides in Prototypes

After a certain amount of the prototypes of Examples 1 to 13 were sealed in an aluminum packaging and then stored in a constant temperature at 54 ° C., the contents of the active ingredient of the pesticide were analyzed in the same manner as the method for analyzing the efficiency of the preparation. The decomposition rate was calculated. Calculation results are shown in Table 2 below.

division Degradation rate of pesticide active ingredient over time (%) 2 weeks after treatment 4 weeks after treatment 6 weeks after treatment Example 1 0.3 0.6 0.8 Example 2 0.1 0.2 0.5 Example 3 0.0 0.1 0.1 Example 4 0.0 0.0 0.2 Example 5 0.0 0.1 0.1 Example 6 0.2 0.5 0.6 Example 7 0.1 0.3 0.5 Example 8 0.4 0.7 0.9 Example 9 0.0 0.1 0.2 Example 10 0.0 0.1 0.3 Example 11 0.1 0.2 0.2 Example 12 0.3 0.4 0.6 Example 13 0.2 0.5 0.7

Degradation test of soil in prototype

After treating the prototypes of Examples 1 to 13 near the rose in a mini-rose pot (1/5000), take samples every 1 month, wash the samples with water, dry them, and then reduce the weight to weight before treatment. The degree of decomposition was investigated. At this time, the water during the experiment period was sufficiently replenished two to three times a week. The analysis results are shown in Table 3.

division % Decomposition 1 month 2 months 3 months 4 months 5 months 6 months 7 months 8 months 9 months 10 months 11 months 12 months Example 1 3 7 13 30 50 67 80 100 - - - - Example 2 19 37 55 69 89 100 - - - - - - Example 3 31 55 67 89 100 - - - - - - - Example 4 38 64 85 96 100 - - - - - - - Example 5 49 76 100 - - - - - - - - - Example 6 67 100 - - - - - - - - - - Example 7 2.2 6.3 10 14 22 32 48 62 72 76 84 90 Example 8 10 25 35 50 62 70 78 86 92 96 100 - Example 9 13 32 47 55 67 76 83 88 95 100 - - Example 10 15 40 58 72 81 89 94 100 - - - - Example 11 26 43 62 79 89 93 100 - - - - - Example 12 35 49 69 85 100 - - - - - - - Example 13 39 65 80 100 - - - - - - - -

Dissolution of Pesticides in Water

100 ml of distilled water was added to a 125 ml test tube, and each of the prototypes of Examples 1 to 13 (about 1.6 to 1.8 g) was treated, and the active ingredient eluted in water over time was analyzed by HPLC. It was replenished with fresh distilled water again. The analysis results are shown in Table 4 below.

division Dissolution rate of pesticide active ingredient in water (%) 7 days later 14 days later 21 days later 35 days later 70 days later Example 1 12.5 16.2 27.5 32.7 40.0 Example 2 11.0 15.8 23.0 29.8 34.0 Example 3 12.4 16.8 20.1 24.8 36.8 Example 4 13.5 18.1 21.8 27.3 41.0 Example 5 12.7 18.2 22.7 29.2 44.4 Example 6 14.5 20.5 29.4 35.5 58.5 Example 7 9.7 13.5 20.1 25.5 30.2 Example 8 8.5 11.7 18.9 22.5 30.0 Example 9 13.6 18.0 21.2 26.1 36.8 Example 10 14.4 18.9 22.3 27.5 39.1 Example 11 12.9 17.3 20.7 25.4 37.8 Example 12 12.7 17.0 21.5 25.7 40.5 Example 13 13.8 19.5 25.4 31.5 41.7

Drug test of prototype

Prototypes of Examples 2 to 4 and Examples 9 to 11 were selected using roses as the test varieties, and treated in facility house packaging. After treatment, aphids were tested as pests for each day. Test subjects and treatment conditions are as follows, and the control effects are shown in Table 5 below.

-Species varieties: roses (saffia)

-Testimonials: Brier aphid (Sitobion ibarae)

-Investigation period: Survey of live animals after 15, 34, 70, 110, 145 days of drug treatment

division Aphid control effect by days after treatment (%) Weak (0-5) 15th 34 days 70 days 110 days 145 days Example 2 87.9  96.8  99.0 100.0 98.6 0 Example 3 85.3  97.0  99.5 100.0 99.0 0 Example 4 88.0  97.6  99.5 100.0 99.3 0 Example 9 85.6  95.3  97.6  99.3 98.5 0 Example 10 84.5  95.0  96.8  98.9 99.0 0 Example 11 85.7  94.8  96.8  99.0 98.6 0 contrast 99.7  99.3  99.6 100.0 99.6 0 Untreated (mari / 10 leaves) 99.3 200.4 110.6  96.5 78.6 -

* Contrast: 10 times sprayed acitra hydrant

** Weak: 0: No weak, 1: Weak weak, 2: Partial weak, 3: 50% weak,

4: 90% or more weak, 5: dead

As can be seen from the above-described embodiment, according to the present invention, by mixing a pesticide with a certain component ratio of resin and organic or inorganic material to prepare a prototype in a row or plate form formulation efficiency of the prototype, time-lapse stability of the active ingredient of the pesticide in the prototype, As a result of testing the degradability in the soil of the prototype, the water dissolution of the active ingredient of the pesticide, the physical properties and the efficacy of the prototype, the formulation efficiency of the prototype was more than 97% and the biodegradable resin and the pesticide were well mixed. The degradation rate of the pesticide active ingredient was lowered to 1.0% after 6 weeks at 54 ° C, so that the pesticide active ingredient was stable in the prototype. On the other hand, the degradation rate of the prototype in soil was minimal until 3 months of treatment, but after 4 months of treatment, the decomposition proceeded rapidly. As a result of examining the control effect on the rose aphid of the prototypes of Examples 2 to 4 and Examples 9 to 11, more than 90% of the control effect was observed from 34 days after treatment to 145 days.

As described above, the string or plate pesticide formulation of the present invention is easy to handle, and the biodegradable resin is slowly decomposed with only one spray, and the pesticide is gradually eluted, thereby bringing the pesticide effect continuously, home, small garden and It solves the trouble of spraying pesticides several times, which is pointed out as a problem of existing diluent pesticides that are used for pest control of various flowers and crops being cultivated in facility houses, the risks to workers during spraying pesticides, and the environmental pollution caused by excessive pesticide spraying. In addition, the biodegradable resins used in the manufacture of pesticides are completely decomposed in the soil, leading to environmentally friendly and economical development of pesticides.

Claims (9)

(a) biodegradable resins and (b) organic or inorganic additives in a weight ratio of a: b = 1-9: 9-1, and containing pesticides, wherein the mixing ratio of resin to pesticide is 50-99.9: 50 The composition which is -0.1 is compounded, and it shape | molded in the form of a string or a plate, According to the addition amount of the organic or inorganic substance, the release period (month) of the pesticide formulation satisfies the following formula 1 to 2, characterized in that the controlled release pesticide formulation of the string or plate: <Equation 1> Release period (months) ≤ -0.1 × amount of organic matter added (% by weight) + 8 (The addition amount of the organic material in Equation 1 is 20 to 60% by weight compared to the biodegradable resin.) <Equation 2> Release period (months) ≤ -0.15 × Addition of inorganic matter (% by weight) + 14 (The addition amount of the inorganic material in the above Equation 2 is 20 to 70% by weight compared to the biodegradable resin.) The biodegradable resin (a) according to claim 1, wherein the biodegradable resin (a) is an acid component monomer, and at least one member selected from the group consisting of dicarboxylic acids represented by the following general formula (1), C ₁ to C ₃ alkyl esters and anhydrides thereof, and alcohol component monomers. It is a cord or plate release controlled pesticide formulation characterized in that the thermoplastic polyester of formula (3) having a number average molecular weight of 10,000 to 100,000, melting point of 50 to 200 ℃ prepared by polymerizing at least one diol of the formula (2) : [Formula 1] HO-C (O) -R ₁ -C (O) -OH (Wherein R ₁ is a substituted or unsubstituted alkylene group having 0 to 30 carbon atoms) [Formula 2] OH-R ₂ -OH (Wherein R ₂ is a substituted or unsubstituted alkylene group having 2 to 20 carbon atoms) [Formula 3] -(OR ₂ -OCR ₁ (O) -C) _n -C (O)- (Where n is a repeating unit and R ₁ and R ₂ are as defined in formulas 1 and 2). 3. The biodegradable resin according to claim 2, wherein the biodegradable resin is a coupling agent such as polyethylene glycol, isocyanate, oxazoline, epoxide, polyfunctional alcohol or polyfunctional carboxyl having a molecular weight of 500 to 20,000 as a third component in addition to the monomers of the formulas (1) and (2). A controlled release pesticide preparation having a string or a plate, characterized in that the polymerization is prepared by introducing an acid or a mixture thereof. The method of claim 1, wherein the biodegradable resin (a) is polybutylene succinate, polybutylene succinate adipate copolymer, polycaprolactone, polylactide, polyamide copolymer and aromatic / aliphatic copolymer alone or A controlled release pesticide preparation having a string or a plate, characterized in that mixed. The method of claim 1, wherein the organic or inorganic additive is one or two or more selected from an organic group consisting of starch, cellulose, lignin, chitin and chitosan, and an inorganic group consisting of calcium carbonate, titanium dioxide, talc, alumina and clay. A controlled release pesticide preparation of a string or plate, characterized in that the mixture. delete According to claim 1, wherein the pesticides (acephate), carbofuran (carbofuran), diazinon (diazinon), acetamiprid (acetamiprid), imidacloprid, propoxur (propoxur), etc. Groups and fungicides include fungicides consisting of dimethomorph, nuarimol, hymexazol, difenoconazole, triflumizole, procymidone and the like One or two or more mixtures of herbicides selected from the group and herbicides group consisting of metribuzin, paraquat, napropamid, etc. . The controlled release pesticide formulation according to claim 1, wherein the mixing ratio (a: c) of the biodegradable resin (a) to the pesticide (c) is 50:50 to 99.9: 0.1 by weight. 10. The controlled release pesticide according to claim 8, wherein the pesticide has a melting point of 20 to 200 ° C and no decomposition of the active ingredient at 100 to 250 ° C.

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