JP2887377B2 - Mold control agent - Google Patents

Description

The present invention generally relates to a fungicide, and
More specifically, the present invention relates to a fungicide that is sprayed on plants or mixed with soil to control fungi (eg Rhizoctonia, Pysium, Dollar spot fungi) causing pathogens on lawns and other plants. is there.

"Prior art and problems to be solved by the invention" There are many types of fungi that cause pathogens in plants. For example, fungi that cause pathogens in lawns on golf courses are mainly Rhizoctonia, Picium, Dollar spots. It is a filamentous fungus such as a fungus, and an agrochemical consisting of a chemical having a controlling effect on these fungi is used to prevent or control these fungi.

However, chemicals often contaminate groundwater and river water, which can render them unsuitable for domestic use over time and adversely affect river fish.

For this reason, recently, research has been conducted on a pesticide using a component of a herb, but none of them has yet been provided with a sufficient control effect.

An object of the present invention is to provide a fungicide for fungi that is harmless to humans and animals, does not become a source of water pollution, and has a control effect comparable to that of conventional chemicals.

"Means and Actions for Solving the Problems" As a result of intensive research and experiments, the inventor has found that a kind of herb used for herbal medicine is extremely effective and harmless for controlling fungi, and has achieved the present invention. Thing,
According to the present invention, there is provided a fungicide containing an extract of yellowing.

Even those containing only Huangling extract can exert control effect against fungi, but Huangling extract contains licorice and Kawakyu. If the extract is selectively used or both are mixed, a more preferable effect is exhibited.

These fungicides further include other herbs such as Hakubashi (oakaku), kakkon (cakkon), ginseng (kujin), rhubarb (daiou), daisou (tea squirt), chimpi (chimpi), capsicum (Shokusho), Toki (Touki),
One or more extracts such as ginger (shokyo) may be appropriately mixed.

Although the amount occupied by Huangling when other extracts are mixed with Huangling extract cannot be strictly limited, it is preferable that the amount of Huangling extract be adjusted to be about 20% or more of the total weight.

In order to obtain these extracts, they are chopped to a suitable size to form chips, to which an appropriate amount of water is added and boiled.

When the fungicide of the present invention is used to control, for example, fungi that adhere to and grow on lawns and other plants, dilute water diluted to an appropriate magnification with water is sprayed with a sprayer or the like.

For example, when used for controlling fungi in soil,
The above-mentioned dilution water is sprayed on the surface, or carried on a carrier made of pumice or other mineral powder or granules, and mixed with the soil.

The fungicide controlling agent according to the present invention exerts a remarkable effect on plant growth promotion and soil improvement by controlling pathogenic fungi by such usage.

"Example" Huangling (Lamiaceae plant Argiope mori) root, licorice (Fabaceae plant Licorice root), Kawakyu (Rumaceae plant Senkyu rhizome), and Rhubarb (Polygonaceae plant rhubarb rhizome) are each cut into 5 mm. ~ 10 mm chips, each 5 g of each chip was added to 300 g of water and boiled, and then squeezed to obtain approximately 150 g of each liquid, and the extract thus poured out according to the following Table 1 Such control agents of Examples 1 to 6 were prepared.

The components of Huangling extract are baicalein, baicalin, agonine, neobaicalein, benzoic acid, etc., the components of licorice extract are glycyrrhizin, liquiritigenin, liquiritin, neoliquiritin, etc., and the components of Kawakyu extract are tetramethylpyrazine, Perlolin, chrysophanol, sedanonic acid, etc., and the components of rhubarb extract are glucoside, genin, chrysophanol, emodin, lein, fissione, and the like.

A control agent of these examples, a sample of rhubarb extract only (EX-1), a sample of licorice extract only (EX-2),
Indoor antibacterial activity of a sample containing only Kawakyu extract (EX-3), a control agent for pycium bacteria (trade name: Sunyard) manufactured by Sankyo Co., Ltd., and a fungus control agent (brand name: Robraal) manufactured by Nissan Chemical Co. Table 2 shows the results of the test.

This indoor antibacterial test was performed in the following manner.

After 39 g of a commercially available test potato dextrose medium was dissolved in distilled water 1, the control agent and the sample of each of the above Examples and each of the commercially available control agents were diluted with water at the magnifications shown in Table 2 and added. Then, 10 ml of each of these was injected into a petri dish having a diameter of 90 mm, and sterilized at 121 ° C. for about 15 minutes to prepare a medium. In Table 2, what is indicated as "untreated" was prepared by dissolving the potato dextrose medium in distilled water, injecting the same into a Petri dish as described above, and sterilizing to prepare a medium. Things.

Furthermore, Rhizoctonia solani and Pythium bacterium (Pythi bacterium), which were purely cultured in separate Petri dishes,
um aphanidermatum) and dollar spot bacteria with a diameter of 5 mm
And inoculated into the center of each medium prepared as described above and cultured at a temperature of 25 ° C. After 24 hours for Pycium and 48 hours for other bacteria, the diameter of each hypha (Bacteria diameter).

In Table 2, the control value is a percentage of the control effect on the bacterium and is calculated by the following formula.

In addition, a control test against Rhizoctonia was performed in the field with respect to each of the control agent, each sample, and the commercially available control agent Lobral (trade name), and the results were as shown in Table 3.

The field test was conducted in the following manner.

1m prepared required number test lawn ² square was uniformly sprayed wheat seeds 20g inoculated with Rhizoctonia fungus for each test lawn performs bacteria inoculated, control agent of each example, each sample and A commercially available control agent was diluted with water to the magnification shown in the table, and this was sprayed on a lawn one week after inoculation with a sprayer.
The spraying was carried out one by one, and thereafter, the spraying was similarly repeated three times every week. Each lawn was observed on the day one week after the last spraying.

The lawn displayed as “no processing” is one that has not been subjected to the above-described spraying processing.

In Table-3, the large number of spot-like wilts on the lawn of the sample (EX-1) is considered to be due to the occurrence of some kind of chemical damage to the lawn. Therefore, when mixing rhubarb extract, it is preferable to minimize it as necessary.

In addition, these tests revealed that a more preferable control agent could be produced by mixing an appropriate amount of licorice Kawakyu extract with Huangling extract.

As is clear from the results in Tables 2 and 3, the fungicides of the above examples exert a control effect that is almost the same as that of conventional chemicals, and these materials are used as herbal medicines. It is used and there is no concern about water pollution and other environmental pollution.

In order to control the fungi in the soil, the control agent of each example is diluted with water to a desired magnification, and the resultant is impregnated with fine particles of a polyhard mineral such as pumice and supported, and then mixed with the soil. Is convenient.

[Effects of the Invention] The fungicide according to the present invention is harmless to humans and animals, does not cause water pollution, and can exhibit almost the same control effect as conventional chemicals.

Claims (3)

(57) [Claims] 1. A fungicide comprising an extract of yellowing. 2. A fungicide comprising a yellowing extract and one or both of a licorice extract and a river cucumber extract. 3. A fungicide, wherein the fungicide according to claim 1 or 2 is carried on pumice grains or other carriers.