JP2001151619A - Termite-proofing agent and its method for production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a termite-proofing agent capable of preventing the damage of a wood caused by the termites safely and for a long period of time by applying liquid containing tannin contained in an un-matured astringent persimmon as a main agent over the wood, and a method for producing the same agent. SOLUTION: This termite-proofing agent contains tannin contained in the un-matured astringent persimmon as a main agent. The agent is obtained by crushing the un-matured astringent persimmon, immersing it into water for a set period of time to dissolve the tannin contained in the un-matured astringent persimmon with water and then elevating its concentration by evaporating a certain extent of water content from the liquid containing the tannin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling termites that damage wood such as a house, and more particularly to a termite control agent containing tannin as a main component contained in immature astringent persimmons and a method for producing a termite control agent. It is about.

[0002]

2. Description of the Related Art Termites are used to kill woods of houses and the like, causing damage to the houses. Among them, highly toxic termite control agents such as arsenic are also used.

[0003]

However, some termiticides, which are highly toxic, such as arsenic, are problematic in terms of work safety, and others are effective for a long period of time. There were problems such as lack of eyes.

[0004] In view of the above problems, the present invention has been made to solve the problems, and an object thereof is to use a liquid containing tannin as a main component contained in immature astringent persimmon. It is an object of the present invention to provide a termite controlling agent and a method for producing a termite controlling agent which can be applied to the surface of wood to prevent the damage of the termite on the wood safely and for a long period of time.

[0005]

Means for Solving the Problems In order to achieve the above object, the termite controlling agent according to the first aspect of the present invention comprises a means mainly containing tannin contained in immature astringent persimmon.

[0006] In the method for producing a termite controlling agent according to the second aspect of the present invention, immature astringent persimmons are crushed and immersed in water for a certain period of time to dissolve tannin contained in the astringent persimmons in water, thereby removing tannins. It consists of means obtained by evaporating a certain amount of water from the contained liquid to increase the concentration.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more specifically. First, immature astringent persimmons are collected. In the persimmon persimmon that begins to grow in May and is harvested from the end of October to November, this persimmon is still immature in early July,
Collected from astringent persimmon trees.

[0008] The collected immature astringent persimmon is crushed together with the skin with a compressor such as a roller and immersed in water of the same weight for about 1 week to 10 days. For example, 1 kg of immature astringent persimmon
For water, 1 kg of the same weight of water is used. In this case, the persimmon juice generated when the immature astringent persimmon is crushed is also put into water together with the crushed fruit.

[0009] The crushed immature astringent persimmon fruit and persimmon juice in water
By soaking for about a week to 10 days, the tannin contained in the immature astringent persimmon is dissolved in water. Thereafter, the crushed astringent persimmon fruit and the liquid containing tannin are separated using, for example, a centrifuge.

Then, in order to increase the concentration of the tannin-containing liquid, the tannin-containing liquid is heated at a medium temperature of about 50 ° C. to 60 ° C. to evaporate water. In this case, at least about 50% of the water is evaporated. When evaporating water, the heating temperature is maintained at a medium temperature of about 50 ° C. to 60 ° C. so as not to boil the liquid, and is not set to a higher temperature.

The liquid persimmon juice containing tannin obtained by the above method is applied to the surface of wood for controlling termites. In this case, the applied wood has a moisture content of 2
Desirably less than 5% dry wood.

If the water content is high, it is difficult for liquid persimmon juice containing tannin to penetrate from the wood surface into the interior and retain it for a long period of time. It becomes necessary to apply liquid persimmon juice to the wood surface.

When a liquid persimmon juice containing tannin is applied to a wood surface, the persimmon juice is impregnated into a cloth, and the surface of the wood is wrapped with the cloth impregnated with the persimmon juice. From the wood surface to the interior of the wood.

According to long-standing experiments, termites do not stick to wood coated with liquid persimmon juice containing tannins. This is thought to be due to the fact that termites dislike the smell of tannin contained in immature astringent persimmons.

[0015]

[Experimental example] [At the prefectural Isahaya Sports Park] At 1:00 pm on July 23, 1999, wood coated with the termite controlling agent of the present invention was installed in a place where termites were found. July 2, 1999
When the wood coated with the termite control agent at 11 am on the 8th was examined, no termites were found.

[At Terashima Park, Omura City] At 2:00 pm on July 22, 1999, wood coated with the termite controlling agent of the present invention was installed at the place where termites were found. July 2, 1999
At 10:30 am on the 6th, the wood to which the termite controlling agent was applied was examined. As a result, no termites were found.

[At: Kuhara Ryujingujima Island, Omura City] At 10:00 am on August 2, 1999, wood coated with the termite controlling agent of the present invention was installed at the place where termites were found. 1999, 8
At 11 am on March 6, the wood to which the termite controlling agent was applied was examined, and no termites were found.

[At: Kuhara Ryujingujima Island, Omura City] At 8:40 am on August 4, 1999, wood coated with the termite controlling agent of the present invention was installed at the place where termites were found. Heisei 11
When the wood coated with the termite control agent was examined on August 13, 1998, the termites were found dead.

[At: Sakuragi Higashibuchi at Hisahara Boatyard in Omura City] At 8:20 am on August 4, 1999, the termite controlling agent of the present invention was applied to the surface of Sakuragi where termites were found. Heisei 11
At 10:00 am on August 9, 2006, the surface of the cherry tree to which the termite control agent was applied was examined, and no termites were found.

[At: Kuhara Ryujingujima Island, Omura City] On August 17, 1999, wood coated with the termite controlling agent of the present invention was installed at the place where termites were found. August 20, 1999
When the wood that had been coated with the termite control agent was examined on the day, the termites were found dead.

[At: Kuhara Ryujingujima Island, Omura City] At 11:00 am on August 21, 1999, the termite controlling agent of the present invention was applied to the tree surface where the termites were found. A tree to which the termite control agent was applied was examined at 10 am on August 28, 1999, and it was found that the termites had died.

[At: Kuwara Ryujingujima Island, Omura City] At 11:30 am on August 22, 1999, wood coated with the termite controlling agent of the present invention was installed at the place where termites were found. At 10:00 am on August 26, 1999, the wood to which the termite controlling agent was applied was examined, and no termites were found.

[0023]

As is clear from the above description, according to the termite controlling agent and the method of manufacturing the termite controlling agent according to the first and second aspects of the present invention, a liquid persimmon juice containing tannin is applied to the surface. Termites have the property of hindering the smell of tannins contained in immature astringent persimmons, which prevents them from sticking to each other, thereby preventing the termites from being safely and for a long period of time. It has a very novel and beneficial effect of being able to do so.

Claims (2)

[Claims] 1. A termite controlling agent comprising tannin contained in immature astringent persimmon as a main component. 2. A method of crushing immature astringent persimmon, immersing it in water for a certain period of time to dissolve tannin contained in the astringent persimmon in water, and evaporating a certain amount of water from the liquid containing tannin. A method for producing a termite controlling agent, wherein the method is obtained by increasing the concentration.