JPS63230605A - Acaride attractant - Google Patents

Abstract

PURPOSE:To obtain an acaride attractant showing excellent attracting effects on whole acarides, comprising a specific fatty acid ester as an active ingredient. CONSTITUTION:An acaride attractant containing a compound selected from myristic ester, palmitic ester, palmitioleic ester, stearic ester, oleic ester, linoleic ester, alpha-linolenic ester and gamma-linolenic acid as an active ingredient. The compound has hardly species specificity, attracts almost all kinds of acarides and capture of acarides by the use of the attractant can eliminate carrier of contagious disease, mental and physical pain such as blood suction and allergy such as infantile asthma caused by acaride.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mite attractant suitable for attracting and capturing sanitary pests such as mites.

[Conventional technology]

In recent years, with advances in construction technology, the airtightness of houses, the spread of air conditioners, and the installation of carpets have created favorable conditions for the inhabitation of mites, and the reality is that the breeding of mites is encouraged. be.

Small animals called sanitary pests such as mites and lice, in addition to transmitting infectious diseases, are harmful to the human body such as blood sucking, biting, and parasitism.
These mites cause physical and mental pain and are a source of allergies for children with asthma and other conditions. For this reason, there is a demand for effective extermination of mites, but the reality is that no effective extermination method or materials for attracting and trapping mites have yet been developed.

[Problem that the invention seeks to solve]

The mites that occur and live indoors in ordinary homes include mites, mites, and mites. Condominium mites were once well known as food mites, but
In recent years, it has been proliferating abnormally on tatami mats. While some, such as the mite, do not cause direct damage to humans, others, such as the spider mite and the black mite, cause direct damage to humans by sucking blood, biting, and causing allergies such as asthma in children. The above-mentioned mites feed on waste materials such as dandruff generated from the human body, food particles, mold, etc., but mites such as claw mites are also known to reproduce by feeding on other mites. Therefore, exterminating all the mites leads to the reduction of so-called spear damage caused by mites. However, small animals such as mites are not only small in size, but also generally live in small spaces, making it extremely difficult to easily confirm their existence with the naked eye and difficult to exterminate them.

In recent years, an aggregation pheromone for white mites has been identified and synthesized, and its attracting effect has been confirmed. Namely, Lardoglyplws knonoi
Extracts from the white deer mite and sugar mite.

It has been discovered that there is an active substance that aggregates the wheat and woolly mites, which is characterized by: 1. 3. 5゜7-tetramethyldecyl formate (1,3,5,7-tetra
+5 etbyldecyl fors+ate). The above substance is named after its scientific name, Lardlua (L).
ardolure). Then, the absolute structure of Raldol Rua is (IR,3R,5R,7R)-tetramethyldecyl formate ((IR,3R,5R,7R)-t
etra*ethyldecyl format)
(R: alkyl group) 9 It was confirmed that the synthesized 0-synthesized raldolaire exhibited the same activity as the natural product.

Although the above-mentioned pheromone exhibits a strong attracting power even in a small amount, it is species-specific, so the types of mites that can be attracted may be limited, and it is insufficient for comprehensive attraction and extermination of mites in general households. Therefore, it is necessary to develop materials for attracting and capturing mites by luring them out of their habitats with suitable attractants, and to discover attractants that are not species-specific and are widely effective against mites. It was desired.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a mite attractant that is not species-specific and exhibits an excellent attracting effect on all mites.

[Means for solving problems]

In order to achieve the above object, the tick attractant of this invention
The active ingredient is at least one compound selected from the group consisting of (A) to ()I below.

(A) Myristic acid ester.

(B) Palmitic acid ester.

(C) Palmitoleic acid ester.

(D) Stearic acid ester.

(E) Oleic acid ester.

(F) Linoleic acid ester.

(G) Alpha-linolenic acid ester.

(H) Gamma linolenic acid ester.

That is, in order to develop an attractant that can easily lure out mites living in the home, the present inventors first conducted research focusing on the food of mites. It was discovered that fats and oils have a strong attracting effect. In the process of further research, it was discovered that old oils and fats that had been repeatedly used for a long period of time had stronger attraction than new oils and fats.Based on this, further research revealed that fatty acid esters form the basis of attraction. We discovered this and arrived at this invention.

The mite attractant of this invention is obtained using a specific fatty acid ester. Examples of the above-mentioned specific fatty acid esters include esters of myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, alpha-linolenic acid, and gamma-linolenic acid, and methyl ester and ethyl ester are particularly preferably used. That is, methyl palmitate is preferably used as the palmitate ester, and methyl stearate is preferably used as the stearate ester. Further, as the oleic acid ester, methyl oleate is preferably used, and as the linoleic acid ester, methyl linoleate and ethyl linoleate are preferably used. Further, as the alpha-linolenic acid ester, ethyl alpha-linolenic acid is preferably used, and as the gamma-linolenic acid ester, methyl gamma-linolenic acid and ethyl gamma-linolenic acid are preferably used.

The above fatty acid esters may be used alone or in combination of two or more. Furthermore, the mite attractant of the present invention may use the above-mentioned pheromone in combination with the above-mentioned fatty acid esters.

When using the above-mentioned compound as an attractant, the attractant compound may be simply adsorbed as it is onto a filter paper or other porous base material, but it is preferable to use it in a formulation. Forms of preparations include: ■ a rubber septum or polyethylene cap impregnated with the tick attractant; ■ encapsulated in a film that allows the release rate of the active ingredient to be controlled; ■ a substance through which the active ingredient cannot penetrate. (1) sealed in a hollow can with one end open; (2) sealed in a sheet with a multilayer structure in which both outer liquid layers are made of film that controls the release of the active ingredient; Examples include those encapsulated within a membrane structure that controls the release rate.

The above-mentioned mite attractant can be used by setting it in an appropriately shaped trap, or by forming an adhesive layer on the surface of the base material and placing the attractant on this surface layer. is valid. It is also effective to mix a mite attractant into the adhesive composition to form a layer of an adhesive substance on the surface of the base material.

Substances with adhesive properties may be liquid or semi-solid at room temperature.For example, oils, softeners, liquid rubber, liquid resins, natural proteins, multiple Ws, and polymeric substances. Examples include pressure-sensitive adhesive substances and adhesive hydrogels whose main component is synthetic resin. As a capture method, the above-mentioned adhesive substance is formed on the surface of a base material such as a film, sheet, molded product, etc. by extrusion, roll, brush, spray, etc., by lamination coating, spraying, etc. After placing an attractant on the surface of a sheet, etc., place it in a place where mites are thought to live, either with the adhesive layer facing upwards or with the adhesive layer facing downwards. In the latter case, it is preferable to interpose a net-like spacer so that the adhesive surface does not come into direct contact with the carpet or the like.

More specifically, as shown in FIG. 1, an adhesive layer 2 is provided on the surface of the mite-killing sheet 1, and a mite attractant 3 is further provided in the center of the adhesive layer 2. Then, these are covered with a mesh spacer 4. Next, the surface of the adhesive layer 2 of the adhesive layer 2 is faced down and applied onto carpets and tatami mats. When applied with the surface of the adhesive layer 2 facing upward, the mite trapping effect may be poor. However, when applying the adhesive layer 2 with the surface facing downward in this way, the surface of the adhesive layer 2 comes into direct contact with the surface of the carpet or tatami mat, so dirt, dust, etc. are captured along with the mites, and the mite extermination sheet 1, it may be difficult to separate it from the carpet and tatami mats. For this reason, as described above, the mesh spacer 4 is provided. The material used for the mesh spacer 4 should preferably have some degree of flexibility.
For example, common plastic mesh and wire mesh are suitable.

In addition, as mentioned above, when using the adhesive layer 2 with the surface facing downward, apply a weight of approximately 50 g per IC to trap the adhesive layer 2 by embedding the surface in the carpet. The same is true for the case where the surface of the adhesive N2 faces upward, which improves efficiency.

Generally, the size of the mite extermination sheet required to capture mites is sufficient if the adhesive area is 25 cj, and about 1 d of the mite attractant may be placed in the center of the adhesive surface. The preferred amount of the active ingredient contained in the tick-attracting preparation is 5 to 10 ml, which can be expected to provide a sufficient attracting effect.

Next, methods for detecting mites captured on the surface of the adhesive N2 include a method of directly counting them using a microscope and a magnifying glass, and a method of simply detecting them with the naked eye. This method of easily detecting mites with the naked eye involves crushing the captured mites to release body fluid, and reacting this body fluid with a specific color-forming compound to develop color, which can be easily detected with the naked eye.

The above method can be easily realized by pressing a sheet made of a composition containing a compound that develops color by reacting with body fluids of mites onto an adhesive surface on which mites have been captured.

The above-mentioned color-forming compound includes ninhydrin, 2.4.6
Examples include -IJ sodium nitrobenzenesulfonate, Proton staining solution, and the like.

〔Effect of the invention〕

As described above, the mite attractant of the present invention contains a specific fatty acid ester as an active ingredient, and its attracting action lures most types of mites that live in ordinary homes from their habitats and captures them. becomes possible. In other words, while pheromones, which are conventional attractants, may limit the types of mites that can be attracted, the tick attractant of this invention has no species specificity in the fatty acid ester that is the active ingredient. , attracts most types of mites.

Therefore, by capturing ticks using this,
It will be possible to eliminate the transmission of infectious diseases caused by ticks, mental and physical pain caused by blood sucking, and allergies such as childhood asthma.

Next, examples will be described together with comparative examples.

[Example 1] An acrylic adhesive was applied to a thickness of 50 μm on the surface of a polyethylene terephthalate base material having an area of 5 cflI x 5 CIII, and various attracting compounds shown in Table 1 below were applied in the center of the adhesive layer. 1) A 1 cm x 1 filter paper with 1 g adsorbed was installed. Furthermore, there is a void of 4n above the surface of the adhesive layer.
A net using nylon thread of lWMφ was provided so as to have +Xtn. Next, the above-mentioned mite-attracting and capturing substrate was applied onto a living room carpet with the sticky side attached with the net facing downward.

After leaving it for 3 days, the number of mites attached to the adhesive layer was counted using a microscope.

[Comparative Example 1] No tick attractant was installed. Other than that, the procedure was the same as in Example 1, and the number of mites attached to the adhesive layer was counted using a microscope.

The results of Example 1 and Comparative Example 1 are shown in Table 1 below.

(Left below) Kaya-1-111 Table 1: The composition of the fatty acid methyl mixture is shown in Table 2 below.

Of the total number of mites counted, 2 to 20% were Dermatophagoides mites and T. mites, and the rest were mites.

[Example 2] The tick-attracting compound was replaced with various compounds shown in Table 3. Other than that, the procedure was the same as in Example 1, and after leaving it for one day, the number of mites attached to the adhesive layer was counted using a microscope. In this case, there were three samples: l1m1-Na3.

[Comparative Example 2] No tick attractant was installed. Other than that, the procedure was the same as in Example 2, and the number of mites attached to the adhesive layer was counted using a microscope.

The results of the average number of fish caught in Example 2 and Comparative Example 2 are shown in Table 3 below.

(Margin below) Table 3 20 to 30% of the average total count of mites were Dermatophagoides mites and T. mites, and the rest were mites.

[Brief explanation of drawings]

The drawing is an explanatory diagram of a substrate for attracting and capturing ticks.

Claims (3)

[Claims] (1) A mite attractant containing as an active ingredient at least one compound selected from the group consisting of (A) to (H) below. (A) Myristic acid ester. (B) Palmitic acid ester. (C) Palmitoleic acid ester. (D) Stearic acid ester. (E) Oleic acid ester. (F) Linoleic acid ester. (G) Alpha-linolenic acid ester. (H) Gamma linolenic acid ester. (2) The tick attractant according to claim 1, wherein the above (A) to (H) are methyl esters. (3) The mite attractant according to claim 1, wherein the above (A) to (H) are ethyl esters.