KR100722366B1 - Process of protecting agent from grass disease - Google Patents

Abstract

The present invention relates to a bottle control agent of the grass for controlling harmful diseases of the grass or to remove weeds, and more particularly, to a bottle control agent of the grass prepared by dissolving organic acid and chitosan in seawater or brine. The present invention relates to a bottle control agent prepared by mixing a water-soluble chitosan derivative in which a quaternary ammonium group is nitrogen-substituted with a certain ratio with respect to chitosan, and a bottle control agent of a grass prepared by mixing a quaternary amine chitosan is used for conventional bottle control. It has the advantage that its antibacterial property is much better than that of the agent.

Quaternary Amine Chitosan, Control Agent, Grass, Antibacterial

Description

Grass bottle control agent and its manufacturing method {PROCESS OF PROTECTING AGENT FROM GRASS DISEASE}

The present invention relates to a bottle control agent of the grass for controlling harmful diseases of the grass or to remove weeds, and more particularly, to a bottle control agent of the grass prepared by dissolving organic acid and chitosan in seawater or brine. The present invention relates to a bottle control agent prepared by mixing a quaternary amine chitosan with a certain ratio of chitosan, and a grass control agent prepared by mixing chitosan derivatives has an advantage of superior antimicrobial activity than conventional bottle control agents. .

In order to control harmful diseases of grass and to remove weeds, various control chemicals have been used, but when used at high concentration, there are problems such as weakness and harmful to human body. do.

Chitosan is a material obtained by deacetylating chitin extracted from the cell wall of crustaceans and microorganisms. In recent years, chitosan is used as a water treatment agent and soil improving agent.In particular, it promotes plant growth by promoting rooting and increasing the activity of plants to suppress the occurrence of pests. In Japanese Patent Laid-Open Nos. 5-30207, 8-175892, 10-236910, etc., when chitosan is used in combination with an organic acid, it is a vegetable decay disease, a grass spring disease, a large patch, a wearing bottle, and a brown patch. It is described as being effective in fruit trees, black diseases, and the like.

In addition, in grass, grasses cannot grow properly due to weeds such as clover or wormwood, and expensive grass is often killed. To prevent this, weeds have been used to remove weeds by hand or by spraying herbicides with toxic pesticides. However, the method of removing the weeds by removing the weeds manually by hand or by spraying the herbicides of toxic pesticides requires a lot of time and manpower, and destroys the environment by contaminating soil or water by various chemicals, There was a problem that has a detrimental effect on. As a means to solve this problem, Korean Patent Publication No. 2001-0000642 describes that the use of a saline-based composition in grass is harmless to humans or livestock and that herbicidal performance is effective.

However, the chitosan to some extent is effective in the disease of grass, but the nucleus of pathogens are not completely eliminated, and the high concentration of salt in the weed removal may be harmful to grass in summer.

Accordingly, the present inventors described the bottle control agent of the grass using chitosan and saline in the Republic of Korea Patent Publication No. 2001-0103832 (2001.11.24) before the application of the present invention, but still did not pursue satisfactory antibacterial activity.

In order to solve the problems as described above, the present invention in the manufacture of a bottle control agent of turf, the preparation of a bottle control agent of turf with strong antibacterial by mixing a certain ratio of chitosan derivatives nitrogen-substituted quaternary ammonium group to chitosan To provide a method.

In order to achieve the above object, the present invention has been devised.

In the bottle control agent manufactured by combining chitosan and an organic acid,

Diluting an organic acid in seawater and a weight ratio of seawater: organic acid to 10: 0.5 to 30: 5;

In the dilution liquid prepared above, the ratio of chitosan: chitosan derivative is 1: 0.3 to 0.5 so as to dissolve the bottle control agent of the grass, characterized in that manufactured through the configuration.

In more detail, the chitosan is used to contain 0.1 to 30% by weight of chitosan with a molecular weight ranging from 5,000 to 2,000,000, and the low molecular weight chitosan used in the present invention has a degree of deacetylation (DA) of at least 75%. And the molecular weight of 5,000 to 2,000,000 is used, in particular, the deacetylation degree is more than 90%, the molecular weight of 10,000 to 100,000 is more preferable to use.

The chitosan derivative is a water-soluble chitosan derivative having an N-substituted quaternary ammonium group, and an aliphatic alcohol having 1 to 4 carbons (methanol, ethanol, propanol, isopropanol, butanol, isobutanol, ethylene glycol, propylene glycol), glycol mono Alkyl ethers (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, etc.), aromatic hydrocarbon compounds (benzene, toluene, xylene, ethylbenzene), dialkyl ketones (acetone, diethyl ketone, ethyl methyl ketone, di-N-propyl) Suspending chitosan in a mixed solvent having a weight ratio of 95: 5 to 50:50 by mixing one or more organic solvents selected from ketone and methylpropyl ketone) by weight; One or more selected from the group consisting of glycidyl trialkyl ammonium salts and glycidyl aryl salts, which are quaternary ammonium epoxide etherification reagents, is added thereto at a temperature of 25 to 80 ° C. by adding 0.5 to 15-fold molar equivalents of the glucoseamine equivalent of chitosan. Etherification by reaction for 2 to 16 hours; or

The step of dispersing chitosan in this step is the same, and the ether reagent is a 3-chloro-2-hydroxy propyl trialkyl ammonium salt, a quaternary ammonium halohydrin ether reagent. , 3-chloro-2-hydroxy propyl aryl ammonium salt, 3-chloropropyl trialkyl ammonium salt, 3-chloropropyl aryl ammonium After adding one or more selected from salts (3-chloropropyl aryl ammonium salt) and adding an alkali to the solid or aqueous solution, add an equimolar or two-fold molar amount with an ether reagent to react at 25 to 80 ° C. for 2 to 16 hours to etherify. do. At this time, the addition of the ether reagent and alkali is preferably made at 40 ℃ or less.

On the other hand, the organic acid used in the present invention is at least one selected from acetic acid, lactic acid, gluconic acid, ascorbic acid, preferably acetic acid is most suitable. The organic acid may be used in an amount of 0.3 to 3 times the weight of the low molecular weight chitosan, and it is preferable to use 0.5 to the same amount in weight of the weight of the chitosan.

In addition, the seawater or brine used in the present invention is used to contain a concentration of 3% by weight to 30% by weight of salt, it is preferable to use those containing 3% by weight to 10% by weight.

Hereinafter, the present invention prepared with the mixture as described above will be described in detail.

Example 1

Dilute 50 g of acetic acid in 900 g of sea water (adjusted to 50 g of salt content per 1000 g), and dissolve 50 g of low molecular weight chitosan (molecular weight 45000, 93% deacetylation) and 15 g of water-soluble chitosan derivative with N-substituted quaternary ammonium groups. Control agents and herbicides were prepared.

Example 2

The same procedure as in Example 1 was conducted except that 900 g of brine (3% saline) was added thereto.

Comparative Example 1

It was used in the same manner as in Example 1 except that water was used instead of sea water.

Example 3 Antibacterial Experiment

The culture medium was inoculated with Psethium handermatum IFO 7030, large patch, Brown patch, Rhizoctonia solaniIFO 30462, a grass patch, and Helminthosporium sacchari IFO 9283, a pathogen in grass, at 25 ° C for 5 days. Table 1 shows the results of the MIC values incubated for 10 days at ℃.

Table 1

Pathogens Pythium handermatum Rhizoctonia solani Helminthosporium sacchari Example 1 0.005 0.005 0.010 Example 2 0.005 0.007 0.015 Comparative Example 1 0.025 0.025 0.040

As shown in Table 1 it can be seen that it has a very high antimicrobial activity compared to the comparative example.

Example 4

In order to investigate the herbicidal properties of shamrock or perennial weed, the composition was diluted 500 times and sprayed by spraying 40L per 100 pyeong, and the grass grows well and the grass is harmless and perennial weed, shamrock, etc. can be confirmed. There was no disease at all.

When chitosan is dissolved in saline and sprayed on the grass as described above, it is possible to prevent the treatment of weeds and to prevent diseases caused by the grass, and to spray at a lower concentration than when used by dissolving in water. Economic effects can also be expected.

Claims (6)

Diluting an organic acid in seawater and a weight ratio of seawater: organic acid to 10: 0.5 to 30: 5; In the prepared diluent, the ratio of chitosan: chitosan derivative is dissolved so that the ratio of 1: 0.3 ~ 0.5; The chitosan derivative is a water-soluble chitosan derivative having an N-substituted quaternary ammonium group, an organic solvent obtained by mixing one or more selected from aliphatic alcohols having 1 to 4 carbons, glycol monoalkyl ethers, aromatic hydrocarbon compounds, and dialkyl ketones. And chitosan in a mixed solvent of 95: 5 to 50:50 by weight and water; One or more selected from the group consisting of glycidyl trialkyl ammonium salts and glycidyl aryl salts, which are quaternary ammonium epoxide etherification reagents, is added thereto at a temperature of 25 to 80 ° C. by adding 0.5 to 15-fold molar equivalents of the glucoseamine equivalent of chitosan. Etherification by reaction for 2 to 16 hours; or The step of dispersing chitosan among the above steps is the same, and the ether reagent is a 3-chloro-2-hydroxy propyl trialkyl ammonium salt which is a quaternary ammonium halohydrin ether reagent. , 3-chloro-2-hydroxy propyl aryl ammonium salt, 3-chloropropyl trialkyl ammonium salt, 3-chloropropyl aryl ammonium After adding at least one selected from the group consisting of 3-chloropropyl aryl ammonium salts, alkali is added to the solid or aqueous solution with the same or two moles of ether reagent and reacted at 25 to 80 ° C. for 2 to 16 hours. Wherein the addition of the ether reagent and alkali is carried out at 40 ° C. or less. delete delete delete delete delete