JPH07228503A - Termite-controlling agent - Google Patents

Abstract

PURPOSE:To obtain a termite-controlling agent capable of being easily applied also to places whereto the application of conventional oil and powder agents is difficult, and capable of effectively controlling also termites at places where the conventional agents can not reach. CONSTITUTION:This termite-controlling agent comprises 1-ethynyl-2-methyl-2- pentenyl chrysanthemate dissolved in liquid carbon dioxide as an active ingredient. The method for controlling termites comprise spraying the termite- controlling agent.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a termite control agent and a termite control method.

[0002]

2. Description of the Related Art Various termite control agents have been known so far, but due to recent changes in architectural styles, for example, there are heat insulating materials and hollow portions in the walls, Increasing number of situations where it is difficult to apply oil agents such as. On the other hand, Japanese Examined Patent Publication No. 3-33482 discloses a method for preventing deterioration of wood by spraying a formulation prepared by dissolving an oil agent containing an insecticidal active ingredient in liquefied carbon dioxide onto wood.
Generally, liquefied carbon dioxide has a low ability to dissolve the insecticidal active ingredient, and therefore, an organic solvent is usually used as disclosed in the publication. Therefore, it is not suitable for use in the wall, under the floor, etc., even if it is used outdoors.

[0003]

The present invention has been made to solve the above-mentioned problems, and as an active ingredient,
1-ethynyl-2-methyl-2-pentenyl chrysanthemate provides a termite controlling agent dissolved in liquefied carbon dioxide gas and a termite controlling method of spraying the termite controlling agent.

1-ethynyl-used in the present invention
2-Methyl-2-pentenyl chrysanthemate is a compound described in JP-B-55-42045, which has a surprisingly high solubility in liquefied carbon dioxide gas, and a sufficient amount for use as a termite controlling agent is an organic compound. It can be dissolved in liquefied carbon dioxide without using a solvent. Furthermore, 1-ethynyl-2-methyl-2-pentenyl chrysanthemate dissolved in liquefied carbon dioxide diffuses evenly in every corner of the heat insulating material and hollow part after spraying, effectively making wood insects such as termites effective. Can be controlled.

In the present invention, 1-ethynyl-2-methyl-2-pentenyl chrysanthemate is usually contained in a liquefied carbon dioxide gas at a weight percentage of usually 0.05 to 50%, preferably 0.5.
~ 20% contained. In addition to 1-ethynyl-2-methyl-2-pentenyl chrysanthemate, piperonyl butoxide, octachlorodipropyl ether, cinepyrine 222, cinepyrine 500 and the like can be appropriately added to the liquefied carbon dioxide gas as synergists. Since 1-ethynyl-2-methyl-2-pentenyl chrysanthemate has various stereoisomers, any active isomer and a mixture thereof can be used. For example, 1-ethynyl-2- Methyl-2-pentenyl (1R) -cis,
Trans-chrysanthate [Empentrin] can be used.

The termite control agent of the present invention is usually used by filling it in a pressure resistant container of 1 to 50 liters made of a material such as iron, aluminum or stainless steel. Furthermore, 1-ethynyl-2-methyl-2 is reduced due to a decrease in the amount of liquid in the pressure vessel.
In order to eliminate the change in the concentration of pentenyl chrysanthemate, it is preferable to use the pressure-resistant container having the following internal structure filled with the termite controlling agent of the present invention.

That is, the pressure-resistant container is (1) a pressure-resistant container body,
(2) Two communication holes arranged vertically are formed in the vicinity of the lower end portion, and are provided vertically inside the pressure vessel main body.
An inner pipe that connects the inside and outside of the pressure-resistant container body,
(3) A plurality of small-diameter communicating holes are formed on the wall surface, and upper and lower end portions are joined to the inner pipe to form an outer pipe covering the upper and lower positions between the two communicating holes in the inner pipe to the vicinity of the upper end portion. Prepare,
Between the inner pipe and the outer pipe, the inner pipe communicates with the inner peripheral side of the inner pipe through a communication hole located on the upper side of the inner pipe, while the outer peripheral side of the outer pipe communicates with the small diameter communication hole of the outer pipe. A space communicating with the inner pipe is formed, and the opening area of the communicating hole located on the upper side of the inner pipe is equal to or larger than the total opening area of the small diameter communicating holes formed in the outer pipe. On the other hand, the opening area of the communication holes located on the lower side of the inner tube is set to be equal to the sum of the opening areas of the small-diameter communication holes formed in the outer tube. preferable.

Examples of the material of the inner tube and the outer tube include copper, copper alloy, stainless steel, etc., and the inner tube has such a length as to reach the bottom of the pressure-resistant container body. The outer diameter of the inner tube is usually 4 ~
12mm, the outer diameter of the outer pipe is usually 2-6 than the outer diameter of the inner pipe
mm is set larger. The outer diameter of the outer tube is usually 120-
About 4 to 6 pieces are provided at intervals of 200 mm, and the diameter thereof is usually 1 to 2 mm. The length of the portion of the lower portion of the inner pipe which is not covered by the outer pipe is usually 2 to 5 mm.
The nozzle for spraying attached to the main body of the pressure-resistant container usually has a nozzle diameter of 0.2 to 3 mm, but the nozzle diameter can be appropriately changed according to the size of the space to be sprayed.

The termite controlling agent of the present invention is used by being sprayed on a place where damage by termites is recognized, such as under the floor or in a wall. At that time, if necessary, it is preferable to drill at several places with an electric drill or the like and spray from each hole for several seconds.

[0010]

EXAMPLE An example of the present invention will be described with reference to FIG. Manufacturing Example As shown in FIG. 1, the pressure vessel is composed of a pressure vessel body 1 having a volume of 3.6 liters, an inner tube 3 and an outer tube 4.
A communication hole 3a located on the upper side and a communication hole 3b located on the lower side are formed in the vicinity of the lower part of the inner pipe 3 so as to be vertically arranged so as to communicate the inside and the outside of the pressure-resistant container body 1. ing. The upper and lower ends of the outer pipe 4 are joined to the inner pipe 3, and the upper and lower positions of the inner pipe 3 between the communication holes 3a and 3b to the vicinity of the upper end are covered. And
A communication hole 3a in the inner pipe 3 is provided between the inner pipe 3 and the outer pipe 4.
A space 5 which communicates with the inner peripheral side of the inner pipe 3 via the through hole 4a and communicates with the outer peripheral side of the outer pipe 4 through a communication hole 4a in the outer pipe 4.
Are formed. Empentrin 5 in this pressure vessel
Add 0g. After attaching valve 2, liquefied carbon dioxide
2450 g is filled to obtain the termite controlling agent of the present invention.

Test Example: 20 cylindrical termite ( Coptotermes s formosanus ) worker ants and moistened cotton balls are placed in a cylindrical plastic cup having a diameter of 5 cm and a height of 3.5 cm, and a lid with a hole having a diameter of 2 mm is placed. The above plastic cup was put in a plastic bag having a volume of 50 liters, and the termite controlling agent obtained in Production Example was sprayed for 3 seconds or 6 seconds to close the plastic bag. After 4 hours, the plastic bag was opened and the state of the termites was observed the next day. The test was repeated 3 times. The results are shown in Table 1.

[Table 1]

Further, the same test as above was carried out when a lid having no holes was placed. The results are shown in Table 2.

[Table 2] As seen in the above table, the termite control agent of the present invention shows an excellent lethal effect even for termites in a plastic cup equipped with a lid having no holes, so that it is difficult to reach with conventional agents. Thus, it can be seen that empentrin, which is the active ingredient of the termite control agent of the present invention, can be reached.

[0013]

EFFECTS OF THE INVENTION The termite controlling agent of the present invention can easily treat the places where it is difficult to treat conventionally used oils and powders, and also effectively control the termites that are difficult to reach with conventional agents. can do.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a state in which a pressure-resistant container is filled with the termite controlling agent of the present invention.

[Explanation of symbols]

 1 ・ ・ ・ Pressure vessel main body 3 ・ ・ ・ Inner tube 4 ・ ・ ・ Outer tube

Front page continuation (72) Inventor Ichiro Inoue 2-351 Akabane, Kita-ku, Tokyo, Liquefied Carbonate Co., Ltd.

Claims (2)

[Claims] 1. A termite control agent comprising 1-ethynyl-2-methyl-2-pentenyl chrysanthemate as an active ingredient dissolved in liquefied carbon dioxide gas. 2. A method for controlling termites, characterized in that 1-ethynyl-2-methyl-2-pentenyl chrysanthemate is sprayed with a termite controlling agent dissolved in liquefied carbon dioxide as an active ingredient.