KR20170130898A - Eco-friendly composition for controlling plant disease and preparation method thereof - Google Patents

Abstract

The present invention provides an eco-friendly composition for controlling plant diseases and a preparation method thereof, wherein the eco-friendly composition does not require a separate processing of sulfur and control the elution of sulfur, thereby being stable, and having an excellent sterilization/insecticidal effect against plant diseases without any weakness. The eco-friendly composition is formed by dispersing powder including natural sulfur and bentonite in water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an eco-

More particularly, the present invention relates to a process for producing a green plant disease-preventing agent and a method for producing the same. More specifically, the present invention relates to a method for producing a plant- The present invention relates to an eco-friendly plant disease controlling agent comprising a powder of natural sulfur and bentonite dispersed in water excellent in sterilization / insecticidal effect, and a method for producing the same.

It is possible to prevent various diseases caused by plants such as wood, crops and the like from occurring beforehand by minimizing the damage of the disease to enable effective control, to promote smooth growth of the plants, and to increase the production amount of the crops.

Recently, the use of sulfur has been proposed as an alternative to disease prevention and control for environmentally friendly organic farming of cultivated crops such as fruit trees, fruit vegetables, and bulbs.

Sulfur (S) is one of the essential essential plant nutrients. It is also used as agricultural fertilizer. It has sterilization and insecticidal action when it is applied to the soil, so it is used as natural pesticide. Most of the sulfur currently being commercialized is either desulfurized from fossil fuels (crude oil, natural gas, etc.) or taken from volcanic areas. However, since natural sulfur is highly toxic, it causes a lot of harm to the crops, and therefore, it is necessary to legislate the sulfur to reduce the harmful effect (Korean Patent No. 10-0908001).

One of the uses of sulfur as a natural pesticide is powder-processed sulfur. When sulfur powder is dispersed in the air, it rubs against vinyl house and iron, causing corrosion of expensive vinyl and iron, The plants gathered in one place and were severely vulnerable to the plants, and were severely damaged by wind and water (Korean Patent Laid-Open Publication No. 1997-064372).

Another use form of sulfur as a natural pesticide is a liquefied sulfur preparation, which is easy to use because of its application, but liquefaction of powder sulfur is difficult due to the tendency of sulfur not to be dissolved in water and conventional liquefied sulfur is also vulnerable to crops There is a problem that it is severe.

Accordingly, it has been desired to develop a method for maximizing the sterilization / insecticidal effect of sulfur by eliminating the problems of sulfur powder or liquefied sulfur formulation, which is a conventional sulfur pesticide, while preventing the plants from being weak.

The inventors of the present invention have found that a composition prepared by dispersing a powder having a certain particle size of sulfur-bentonite prepared by adding a certain amount of bentonite to molten sulfur is dispersed in water, It is possible to use sulfur as an antiseptic agent for environment-friendly plant disease which has a good sterilizing / insecticidal effect while preventing the plants from being harmed by the sulfur.

Accordingly, an object of the present invention is to provide an environmentally-friendly plant disease control agent having a sulfur-bentonite powder dispersed in water and gradually dissolving sulfur to prevent phytotoxicity of plants, while exhibiting excellent sterilizing / insecticidal effect.

Still another object of the present invention is to provide a method for producing an environmentally-friendly plant disease control agent comprising the step of forming a sulfur-bentonite powder and dispersing sulfur-bentonite powder in water.

In order to achieve the object of the present invention,

30 to 60% by weight of a sulfur-bentonite powder having a particle size of 200 to 1,000 mesh, 3 to 10% by weight of a dispersant, 0.01 to 1% by weight of a thickener, and the balance water.

Sulfur-bentonite powder

In the present invention, the sulfur-bentonite powder can be produced by mixing bentonite powder with molten sulfur, cooling and pulverizing.

Sulfur used in the production of sulfur-bentonite powder is preferably molten sulfur which is not formulated. Molten sulfur (boiling point 118 ° C) is produced by desulfurizing by distillation from fossil fuels (crude oil, natural gas, etc.) and is commercially available.

The sterilization / insecticidal effect of sulfur is due to the following actions: (a) the action of gaseous sulfur and sulfur itself produced by sublimation of sulfur, (b) the action of sulfur dioxide, such as sulfur dioxide, The effect of hydrogen sulfide produced when sulfur comes into contact with the tissues of plants or bacteria, and the effect of sterilization of pathogens with high fat content by exhibiting permeability with high lipophilic property of sulfur.

The weight ratio of sulfur to bentonite in the sulfur-bentonite powder of the present invention is preferably 19 to 17: 1 to 3 (9.5 to 8.5: 0.5 to 1.5). If the weight ratio of sulfur is less than the above range, the sulfur content is insufficient, and when the weight ratio of bentonite is in the above range, sulfur-bentonite powder becomes stiff and thick like porridge when dispersed in water, so that mixing and mixing are difficult.

Bentonite which can be used in the present invention is a clay mineral which is an aggregate of fine colloidal materials and exhibits high viscosity and higher cation exchange capacity than clay minerals with different color and exhibits white, gray, pale brown, pale green and the like. Bentonite is divided into two types, sodium-bentonite and calcium-bentonite, by their physical properties. Bentonite is composed of an expansive three-layered structure (Si-Al-Si) with a particle structure. In the middle layer of Ai, Al, which is 3+, is replaced by Mg, which is 2+, Which is bound to Na or Ca.

In the sulfur-bentonite powders of the present invention, the bentonite enhances the dissolution of the sulfur and diffusive action (the action of decomposing sulfur in the bentonite-binding structure and spreading the decomposed sulfur uniformly). When molten sulfur and bentonite are mixed at high temperature, some of Na or Ca of bentonite is replaced with S, and sulfur enters the bentonite structure. Therefore, after the controlling agent of the present invention is treated on the crop, the bentonite controls the dissolution of the sulfur, so that the sulfur slowly dissolves. As a result, the sulfur leaching is controlled so that it is not released to the soil or the atmosphere in a moment, so that the occurrence of the weakening of the plant can be prevented. This process has the same effect as a safe sulfur through a kind of legislation. The bentonite used in the present invention may be prepared by pulverizing the raw ore in the form of powder or commercially available. The particle size of the bentonite powder is preferably 200 mesh or more, but is not limited thereto.

The sulfur-bentonite powder in the controlling agent of the present invention can be prepared by adding bentonite powder to molten sulfur and mixing and then pulverizing the mixture. The particle size of the powder is 200-1,000 mesh, most preferably 800-1,000 mesh.

When the sulfur-bentonite powder is contained in an amount of more than 60% by weight, it is difficult to be dispersed in water (it becomes stiff and thick like porridge, And mixing is difficult). When the content is less than 30% by weight, the content of sulfur is decreased and the sterilization / insecticidal effect becomes weak.

Dispersant

The dispersant in the present controlling agent allows the non-polar sulfur-bentonite powder to be stably suspended in water.

As the dispersing agent that can be used in the present invention, a surfactant may be used, and preferably an anionic surfactant, a cation surfactant, an amphoteric surfactant, a nonionic surfactant, surfactant) can be used, but it is not limited thereto unless it is harmful to plants and animals.

If the amount of the dispersant is less than 3% by weight, the dispersion of the sulfur-bentonite powder in water may not be performed well. If the amount of the dispersant exceeds 10% by weight, do.

Thickener

In the antifouling agent of the present invention, the thickening agent serves to stabilize the composition by increasing the viscosity and prevent sedimentation of the sulfur material.

As the thickening agent in the present invention, it is preferable to use at least one of xanthan gum, guar gum, gum arabic, rogastin gum, alginic acid gum, agar or carrageenan.

In the present invention, the thickener may be contained in an amount of 0.01 to 1% by weight, and if it is less than 0.01% by weight, the sulfur particles may not be uniformly stabilized in the product.

In the present invention, the term " control " means prevention or control of plant diseases, specifically, microorganisms such as bacteria, fungi and viruses which cause plant diseases; Aphid, pulp, and the like.

In the present invention, 'sterilization' means not only sterilization of microorganisms but also inhibition of growth of microorganisms and inhibition of infection. Likewise, the term 'insect' in the present invention means not only to kill insects, but also to inhibit growth and propagation of insects.

Examples of plant diseases that can be controlled by the controlling agent of the present invention include powdery mildew of cucumber, strawberry, tomato, and the like, Chinese cabbage / rootstock disease, potato scab disease, onion black rot mycosis, aphid, But is not limited to.

The method of using the plant disease control agent according to the present invention can be used by treating the plant as a soil conditioner after diluting 500 times / 10a with water in the growing period of the crop, and the foil and the crop such as pumpkin, cucumber, melon, watermelon are diluted 2,000 times But is not limited thereto.

For another object of the present invention,

I) preparing a sulfur-bentonite powder having a particle size of 200 to 1,000 mesh;

Ii) adding water and a dispersant to a mixer and adding and mixing sulfur-bentonite powder while stirring;

Iii) stirring the mixed solution for 60 to 120 minutes to disperse the sulfur-bentonite powder; And

Iv) Step of injecting thickener

The present invention provides a method for producing a plant disease control agent comprising

Step i): Preparation of sulfur-bentonite powder

Sulfur-bentonite powder is prepared by mixing bentonite powder with molten sulfur, cooling and then pulverizing the powder to 200 to 1,000 mesh, preferably 800 to 1,000 mesh.

The weight ratio of molten sulfur and bentonite to sulfur: bentonite is the same as described above.

Since the melting point of the molten sulfur is 118 ° C, the temperature control during the supply is continued so as to maintain the molten state.

The mixing can be carried out in a conventional manner. For example, mixing molten sulfur at 118 to 135 ° C in a short time (6 to 10 seconds) at a high speed (3,000 to 3,600 rpm) in a mixer, but the present invention is not limited thereto. Bentonite is highly viscous and mixing should be done in a short time to increase the effect of mixing.

The mixed sulfur-bentonite mixture is prepared in the form of granules having a diameter of 2.5 to 5 mm and a height of 1.2 to 1.8 mm and then pulverized using a pulverizer such as a milling machine to produce 200 to 400 mesh sulfur-bentonite powder. In addition, a fine powder having a particle size of 800 to 1,000 mesh is prepared from a sulfur-bentonite powder by using a wet pulverizer using beads or the like.

Step ii): Mixing

Water and a dispersant are put into a mixer and mixed with sulfur-bentonite powder while stirring.

The dispersing agent is as described above.

34 to 66.99% by weight of water, 3 to 10% by weight of dispersant and 30 to 60% by weight of sulfur-bentonite powder are added.

The mixer can be used without limitation as long as it is a mixer equipped with a stirrer.

It is preferable to gradually add the sulfur-bentonite powder while stirring the mixture of water and the dispersant. The stirring speed for mixing is preferably from 50 to 100 rpm, and the stirring time for mixing is preferably from 1 to 10 minutes, but is not limited thereto.

Step iii) dispersion

The mixed liquid from step ii) is stirred for 60 to 120 minutes to disperse the sulfur-bentonite powder to form a composition in which the sulfur-bentonite powder has been hydrated (dispersed).

The stirring speed for dispersion is preferably from 50 to 100 rpm, but is not limited thereto.

Step iv): Thickening

A thickener is added to the solution from step iii) to adjust the viscosity to complete the controlling agent.

The thickening agent is as described above.

The thickener is preferably added in an amount of 0.01 to 1% by weight.

The thickener may also be diluted with a liquid dispersant.

The viscosity of the controlling agent of the present invention is preferably such that the viscosity of the controlling agent of the present invention is not too sticky but can easily come out from the product bottle, but is not limited thereto.

In a further aspect of the present invention, the present invention provides a process for the preparation of a composition comprising 30 to 60% by weight of sulfur-bentonite powder, 3 to 10% by weight of a dispersant, 0.01 to 1% by weight of a thickener, Provide a plant disease control agent.

The plant disease control agent according to the present invention is excellent in sterilization / insecticidal effect, is stable, and has almost no weakness to plants, which inhibits the growth of harmful bacteria and insect pests, thereby alleviating the damage of crops and maintaining healthy crops, And is suitable for the prevention and management of soil damage and can be used as an environmentally friendly organic material suitable for safety management of human diseases.

In particular, the plant disease control agent of the present invention has a structure in which sulfur is substituted for Na and Ca in the structure of bentonite, so that after application to the crops, the sulfur slowly melts and prevents the plant from being harmed, Lt; RTI ID = 0.0 > sterilizing / insecticidal <

In addition, in the plant disease control agent of the present invention, sulfur has a fertilizing effect that contributes to the yield of crops by acting as one of essential plant nutrients in addition to sterilizing / insecticidal effect, and there is no need to legislate sulfur.

1 is a manufacturing process diagram of an example of the manufacturing method according to the present invention.
Fig. 2 and Fig. 3 are photographs of the plant disease control agent prepared in Production Example 1. Fig.
Figs. 4, 5 and 6 are photographs showing the control effect of the plant disease control agent prepared in Preparation Example 1. Fig.
FIG. 7 is a photograph showing the procedure of treating the reference amount and the amount of the plant disease control agent of the present invention with respect to the soil, respectively.
FIGS. 8, 9, and 10 are photographs showing the appearance of the target plants weakened during 3, 7, and 14 days after the treatment of the plant disease control agent of the present invention, respectively.

Hereinafter, the configuration and effects of the present invention will be described in more detail with reference to specific embodiments in order to facilitate understanding of the present invention. However, the following examples are merely illustrative of the present invention in order to more clearly understand the present invention, and the scope of the present invention is not limited by the following examples.

Example

Manufacturing example  One

(S-Oil) was filtered with 10 mesh to remove impurities. 40 kg of the mixture was placed in a mixer (Inline mixer, manufacturer IKA), and 200-mesh sized bentonite powder (ASHAPURA INTERNATIONAL LTD.) Was added thereto. 5 kg were added and mixed, and the mixture was pulverized to an average of about 325 mesh in a pulverizer (bundle rope) to prepare a sulfur-bentonite powder.

46.97 Kg of water and 7.2 Kg of surfactant (NK-SC240; Co-Seal Co., Ltd.) were added to the mixer (SeKwang Chemical Plus) and 45 Kg of sulfur-bentonite powder was stirred for 10 minutes while stirring at 50 rpm And mixed. The mixed solution was stirred at a stirring speed of 50 rpm for 60 minutes so that the sulfur-bentonite powder was completely dispersed in water. To the resultant solution was added 0.03 Kg of a thickening agent (xanthan gum; Jupiter International) diluted with 0.8 Kg of a surfactant (NK-SC240; Co-seal Co., Ltd.) And the photograph is shown in Fig. 2 and Fig. 3.

Manufacturing example  2

(S-Oil) was filtered with 10 mesh to remove impurities. 44 kg of the mixture was placed in a mixer (Inline mixer, manufacturer IKA), and 200-mesh sized bentonite powder (ASHAPURA INTERNATIONAL LTD.) Was added thereto. 5 kg were added and mixed, and the mixture was pulverized to an average of about 325 mesh in a pulverizer (bundle rope) to prepare a sulfur-bentonite powder.

43.99 kg of water and 6.6 Kg of a surfactant (NK-SC240; Co-seal) were added to a mixer (manufactured by Shinseong Engineering), and 49 Kg of sulfur-bentonite powder was added over 5 minutes while stirring at a speed of 100 rpm And mixed. The mixed solution was stirred at a stirring speed of 100 rpm for 120 minutes so that the sulfur-bentonite powder was completely dispersed in water. 0.01 Kg of a thickening agent (xanthan gum; Jupiter International) was added to 0.4 Kg of a surfactant (NK-SC240; Co-seal Co., Ltd.), and the viscosity of the solution was gradually adjusted to control the viscosity And the plant disease control agent prepared was as shown in Fig.

Production Example 3

(S-Oil) was filtered with 10 mesh to remove impurities. 40 kg of the mixture was placed in a mixer (Inline mixer, manufacturer IKA), and 200-mesh sized bentonite powder (ASHAPURA INTERNATIONAL LTD.) Was added thereto. And granulated to have a diameter of about 3 mm and a height of about 1.6 mm. The granules were pulverized in a pulverizer (Burndorff) to produce about 300 mesh of sulfur-bentonite powder, Sulfur-bentonite powder having a particle size of 800 mesh was prepared by using a wet pulverizer.

46.97 Kg of water and 7.2 Kg of surfactant (NK-SC240; Co-Seal Co., Ltd.) were added to the mixer (SeKwang Chemical Plus) and 45 Kg of sulfur-bentonite powder was stirred for 10 minutes while stirring at 50 rpm And mixed. The mixed solution was stirred at a stirring speed of 50 rpm for 60 minutes so that the sulfur-bentonite powder was completely dispersed in water. To the resultant solution was added 0.03 Kg of a thickening agent (xanthan gum; Jupiter International) diluted with 0.8 Kg of a surfactant (NK-SC240; Co-seal Co., Ltd.) And the plant disease control agent prepared was as shown in Fig.

Experimental Example 1: Cucumber powdery mildew prevention effect test

Using the control agent of the present invention prepared in Preparation Example 1, a pharmaceutical effect test for cucumber powdery mildew (Sphaerotheca fusca ) was commissioned by the University of Industrial Science, Kongju National University, and the greenhouse cultivation of cucumber (four beats) (Fig. 4, Fig. 5 (test section) and Fig. 6 (untreated section)), and the test results are shown in Table 5.

Test agent Drug efficacy test Usage (dilution factor) When and how to process The control agent of Production Example 1 4L / 10a
(500-fold dilution) Every 7 days
2 times soils
(9/1, 9/8) No treatment - -

<Processing content>

How to grow Installation facility Full day (month / day) Width (cm) Planting density (cm) Facility cultivation
(Vinyl-coated) Mulching in the facility 8/2 120 40 x 40

<Overview of Seedlings>

division Treated water Number of repeats Muzzle count Area per unit Required area Control efficacy 2 3 6 10㎡ 60㎡

<Arrangement and Area of Test Sphere: Arbitrary Arrangement Method>

division Survey item Number of investigations Date of investigation Investigation method Drug efficacy test Outbreak 1 time 9/16 After 7 days of the final drug treatment, the lesion area ratio for 100 leaves per 10 weeks was examined,

<Survey method>

Test agent Outbreak rate (%) Control (%) Ⅰ repeat Ⅱ repeat Ⅲ repeat Average The control agent of Production Example 1 7.6 9.8 8.7 8.7 77.6 No treatment 35.6 42.3 38.9 38.9 -

<Test result: Pharmaceutical effect on cucumber powdery mildew>

From Table 5 and FIGS. 5 and 6, the controlling agent of the present invention showed a control effect of 77.6% compared to the untreated control and showed a disease severity of 38.9% in the untreated incidence rate, (More than 20%). Therefore, it is possible to confirm the excellent control effect against cucumber powdery mildew because there is no abnormality in evaluating the drug effect. Therefore, it can be understood that the controlling agent of the present invention can be used as an environment-friendly material for disaster prevention of plants.

Experimental Example 2: Fracture test on crops

The fungicidal test of the composition of the present invention prepared in Preparation Example 2 for five target crops was commissioned by the Environmentally Friendly Agricultural Products Safety Center of Kangwon National University from September to October 2013 as follows. Respectively.

< Test Method>

end. Location: Kangwon National University Eco-friendly Agricultural Research Center Greenhouse (Facility Cultivation)

I. Test crops: Chinese cabbage, lettuce, cucumber, red pepper, radish,

All. Test period: 2013. 9. 27 ~ 2013. 10. 11

la. Processing contents

Treatment NPK dosage
(kg / 10a) Plant material usage (mL / 20L) cabbage Lettuce cucumber pepper radish No treatment - - - - - - Standard amount - 40 40 40 40 40 Volume - 80 80 80 80 80

hemp. Test Area Arrangement and Area: Fully Arrangement Method, 3 Repetitions

bar. Test Methods

Chinese cabbage (September 23, 2013), lettuce (August 23, 2013), cucumber (October 18, 2013, self-seeding), pepper ), Non-seeded (Aug. 20, 2013, seedlings) seedlings were planted in a greenhouse for green agriculture research center in Warmer Port (1/5000 a) on September 27, 2013, (Standard amount: 500 times dilution, dilution amount: 250 times dilution) was applied to the soil.

In the greenhouse, the greenhouse is controlled by checking the temperature and humidity for 3 times a day, using a greenhouse equipped with an automatic opening and closing shading film and a cold confinement device. The watering treatment is conducted once a day to three times a day, depending on the temperature and humidity, Respectively.

The results of the phytotoxicity tests were compared with those of the control plants (Figs. 8 to 10), and the results were shown in Table 7. The survey criteria (when comparing untreated area with reference volume and volume) are 0: no visual weakness was observed; 1: very light weakness, slight weakness is recognized; 2: weakness is recognized in the cow parts of treated leaves; 3: Fifty percent of the treated leaves were vulnerable; 4: I am suffering considerable damage, but I still have a good part; 5: Severely damaged and classified as dead.

Crop name Treatment Weak (0-5) Weak Symptoms 3 days 7 days 14 days
cabbage No treatment - - - - Standard amount 0 0 0 none Volume 0 0 0 none
Lettuce No treatment - - - - Standard amount 0 0 0 none Volume 0 0 0 none
pepper No treatment - - - - Standard amount 0 0 0 none Volume 0 0 0 none
cucumber No treatment - - - - Standard amount 0 0 0 none Volume 0 0 0 none
radish No treatment - - - - Standard amount 0 0 0 none Volume 0 0 0 none

From Table 7, no damage to the target crops was observed according to the application of the controlling agent of the present invention during the period of the weakening test, and no unusual symptom that could be judged as a weakness was found The sound is confirmed. Therefore, the control agent of the present invention was judged to be suitable for organic agricultural material disclosure and quality certification standards because no symptoms appeared on crops when fertilized.

Claims (5)

30 to 60% by weight of a sulfur-bentonite powder having a particle size of 200 to 1,000 mesh, 3 to 10% by weight of a dispersant, 0.01 to 1% by weight of a thickener,
The sulfur-bentonite powder is prepared by mixing bentonite powder with molten sulfur and pulverizing it,
The weight ratio of the molten sulfur: bentonite is 19 to 17: 1 to 3,
Wherein the thickening agent is any one selected from the group consisting of xanthan gum, guar gum, gum arabic, rogastin gum, alginate gum, agar and carrageenan.
The plant disease according to claim 1, wherein the plant disease is any one selected from the group consisting of powdery mildew of cucumber, strawberry and tomato, Chinese cabbage / rootstock disease, potato scab disease, onion black rot mycosis, aphid and powder Control agent.
A method of producing a plant disease control agent according to claim 1,
I) Mixing bentonite powder with molten sulfur and pulverizing to produce a sulfur-bentonite powder having a particle size of 200 to 1,000 mesh;
Ii) adding water and a dispersant to a mixer and adding and mixing sulfur-bentonite powder while stirring;
Iii) stirring the mixed solution for 60 to 120 minutes to disperse the sulfur-bentonite powder; And
Iv) adding a thickening agent,
The weight ratio of the molten sulfur: bentonite is 19 to 17: 1 to 3,
Wherein the thickening agent is any one selected from the group consisting of xanthan gum, guar gum, gum arabic, rogastin gum, alginic acid gum, agar and carrageenan.
The method according to claim 3, wherein the sulfur-bentonite powder is added in an amount of 30 to 60% by weight, the dispersant in an amount of 3 to 10% by weight, the thickener in an amount of 0.01 to 1% by weight and the water in an amount of 30 to 66.99% by weight.
4. The process according to claim 3, wherein the stirring speed in step iii) is 50 to 100 rpm.

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