KR20010103832A - Protecting agent from grass disease - Google Patents

Abstract

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

The present invention relates to a composition capable of controlling grass disease and removing weeds, and dissolving chitosan or chitosan derivatives together with organic acids in saline to bring about the stability of chitosan's mechanism of action against turfgrass and exhibit high antimicrobial activity. The present invention relates to a grass disease control agent and a herbicide which can control grass disease and at the same time remove weeds, promote grass rooting and increase grass bioactivity.

In this case, not only can weed removal effect of the weeds and the disease caused on the grass, but also can be sprayed at a lower concentration than when dissolved in water can be expected to be effective and economic effect on the grass.

Description

Protective agent from grass disease

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 shells of shellfish and microorganisms. In recent years, chitosan has been used as a water treatment agent and soil improving agent. 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 discloses that the composition of the saline-based composition is harmless to humans or livestock, and the 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.

The present invention relates to a composition capable of controlling grass disease and removing weeds, and by dissolving chitosan or chitosan derivatives together with organic acid in saline, bringing the stability of the mechanism of action against chitosan grass disease, showing high antimicrobial activity The present invention relates to a grass disease control agent and a herbicide which can control weeds and simultaneously remove weeds, promote rooting of grass and increase grass bioactivity.

The present invention relates to a disease control of grass and a composition capable of removing weeds, and more particularly, to the control of grass prepared by dissolving organic acid in seawater or salt-dissolved saline and dissolving chitosan or chitosan derivatives in the above solution. It relates to herbicides and herbicides.

Detailed Description of the Invention Chitosan is used to contain 0.1 to 30% by weight of chitosan with a molecular weight in the range of 5,000 to 2,000,000, and the low molecular weight chitosan used in the present invention has a deacetylation degree of 75% or more and a molecular weight of 5,000 to 2,000,000. In particular, the deacetylation degree is 90% or more, the molecular weight of 10,000 to 100,000 is better to use. Chitosan derivatives may use CM-chitosan, quaternized chitosan, and quaternized chitosan is more effective.

On the other hand, the organic acid used in the present invention is acetic acid, lactic acid, gluconic acid, ascorbic acid and the like, of which acetic acid is most suitable. The concentration of the organic acid may be used in an amount of 30% to 300% by weight based on the weight of the low molecular weight chitosan, and preferably 50% by weight to the same amount based on 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

50 g of acetic acid was diluted in 900 g of seawater (adjusted to 50 g of salt content per 1000 g), and 50 g of low molecular weight chitosan (molecular weight 45000, 93% deacetylation) was dissolved to prepare a bottle control agent and a herbicide of grass.

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 Test)

The culture medium was inoculated with Pythium handermatum IFO 7030 , a grass patch, Brown patch pathogen, Rhizoctonia solani IFO 30462 , 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 at 25 ° C. for 10 days.

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 3

In order to investigate the herbicidal properties of shamrock or perennial weeds, 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 weeds, shamrock, etc. can be confirmed. There was no disease at all.

When the chitosan is dissolved in the brine 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 it in water. Economic effects can also be expected.

Claims (3)

A bottle control agent and herbicide of grass, which is prepared by dissolving and mixing low molecular weight chitosan in a solution in which organic acids are dissolved in seawater or brine. According to claim 1, chitosan is used to contain 0.1 to 30% by weight of chitosan with a molecular weight in the range of 5,000 to 2,000,000, and deacetylation degree of 75% or more, and chitosan derivatives include CM-chitosan and quaternized chitosan derivatives. A bottle control agent and herbicide of grass, characterized in that it contains. 2. The bottle control agent and herbicide of the grass according to claim 1, wherein the seawater or the brine has a concentration of 3% to 30% by weight of the salt.