JPS5839604A - Agent for suppressing ingestion damage of wool vermin - Google Patents

Abstract

PURPOSE:To prepare the titled agent for suppressing the ingestion damage of wool vermin such as clothes moth, KOIGA (Tineola bisselliela), varied carpet beetle, etc., having high and long-acting mothproofing effect and effective for the repelling of the wool vermin, at a low cost, by using 10-undecylenoic acid methyl or ethyl ester as an active component. CONSTITUTION:The objective agent contains 10-undecylenoic acid methyl and/or ethyl ester of formula (R is CH3 or C2H5) as an active component. The compound has the taste and flavor similar to quince and is useful as flavor for various fruit essences. If necessary, an additive such as flavor may be added to the agent. The above compound may be used by sealing as it is in a proper vessel, or by supporting on a substrate such as silica gel, talc, cloth, paper, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feeding damage suppressant for wool pests, and more specifically, the present invention relates to a feeding damage suppressant for wool pests, such as bur moth, carp moth, Japanese cutlet beetle, Japanese cutlet bug, etc. The present invention relates to a feeding damage suppressant whose active ingredient is methyl ester or ethyl ester of 10-undecylenic acid, which has activities such as antifeeding, repellent, and insecticidal effects.

Conventionally, naphthalene,
Camphor, Balajichlorobenzene, etc. are used, and among them, they have a strong insecticidal effect and are inexpensive.
Baladichlorobenzene is the most widely used.

However, baladichlorobenzene is a type of organic chlorine-based drug, and there is a risk that it may accumulate in living organisms and cause harm, and its use is becoming regulated. The use of the organic chlorine-based chemicals aldrin and aldrin, which are used as insect repellents for textile processing, is already prohibited.

Therefore, in recent years, many compounds or combinations thereof have been proposed as insect repellents or repellents to replace Baladichlorobenzene. For example, a wool insect repellent (fF Kaisho 50-2
No. 4436), an insect repellent containing a cyclic compound having 10 carbon atoms and an ether bond as an active ingredient (Japanese Unexamined Patent Publication No. 52-1
10823), adamantane, sublimable hydrocarbon,
and a sublimable insect repellent comprising a polar compound having sublimation or volatility (Japanese Unexamined Patent Publication No. 121936/1989), an insect repellent containing as an active ingredient (Japanese Unexamined Patent Publication No. 109938/1983), naphthalene and 2-isopropyl- Insect repellent for clothing containing a combination of 5-methylphenol as an active ingredient
-32620), insect repellent for clothing containing acetoxime as the main component (Japanese Unexamined Patent Publication No. 101425/1983), α-
Insect repellent containing as an active ingredient an aromatic compound having a substituent such as a carbon chain with a branched position (4!
No. 4-110321), an aromatic insect repellent containing carvone as an active ingredient (Japanese Unexamined Patent Publication No. 19229/1982)
etc. have been proposed.

However, all of these insect repellents have disadvantages, such as being more expensive than Balajichlorobenzene, having significantly lower insect repellent effects, being highly volatile and having poor sustainability, and changing significantly over time. death,
This cannot be said to be fully satisfactory in practical terms.

In view of these circumstances, the present inventors have developed a method that is inexpensive, has excellent insect repellent effects, and has a long-lasting effect. Top safety 0
As a result of repeated research on high-performance anti-inflammatory agents, we have found that the purpose can be achieved by using methyl 10-undecylenate and ethyl 10-undecylenate as active ingredients. Based on this finding, we have completed the present invention.

That is, the present invention provides a feeding damage suppressant for wool pests, which is characterized by containing 10-methyl undecylenate, 10-ethyl undecylenate, or both as active ingredients.

Methyl 10-undecylenate and ethyl 10-undecylenate, which are active ingredients of the feeding damage suppressant of the present invention, are represented by the chemical structural formula % (in which R is a methyl group or an ethyl group). It is an unsaturated fatty acid ester and has a flavor similar to quince.
It is used as a phlegm for various fruit essences.

The above compound can be obtained by esterifying 10-undecylenic acid and methyl alcohol or ethyl alcohol according to a commonly used method.

Although these methyl 10-undecylenate and ethyl 10-undecylenate have high boiling points of 250° C. and 265° C. and low vapor pressure, they have a strong effect of suppressing feeding damage to wool pests. The reason for this is presumed to be that the presence of the terminal double bond is a factor that enhances the activity.

In addition, due to its low vapor pressure, it has excellent sustainability of its ability to suppress feeding damage.In the feeding damage suppressing agent of the present invention, methyl 10-undecylenate or ethyl IO-undecylenate may be used alone. or a mixture of them may be used. ,
Furthermore, additives such as fragrances can be added as desired.

The feeding damage inhibitor of the present invention may be used as is by being sealed in a suitable container, or may be supported on a support such as silica gel, tarpaulin, cloth, or paper. .

The feeding damage inhibitor of the present invention is inexpensive, has an excellent insect repellent effect, has a long-lasting effect, and is a practical feeding damage inhibitor with high integrity. It is effective in exterminating wool pests such as the cutlet beetle and the lesser cutlet beetle.

Next, the present invention will be explained in more detail with reference to Examples.

Example: Put methyl 10-undecylenate or ethyl 10-undecylenate 5 (19) in the bottom of a 500-volume bottle, and place 5 cIn above the bottle with 30 days old, average weight 30-35 cm/10
1.0 head burr larvae and wool standard test cloth (2crnX2
The basket containing cyy+, 40 to 45 ■) was fixed.

Next, the bottle was sealed and left in a constant temperature and humidity room at 3.0°C and humidity of 65°C for 7 days, after which the wool was removed, the amount of feeding damage was measured, and the number of dead insects was counted. Insects are also 1 in their natural state.
After leaving it for a day, the number of deaths was counted again to determine the mortality rate.

The results are shown in the table below along with the boiling point of the ester.

For comparison, tests similar to those in the Examples were also conducted on other esters, and the results are shown in the following table.

Note that the values in the table are average values obtained by conducting the test 5 to 9 times. Moreover, the feeding damage rate is expressed as a percentage of the amount of feeding damage on the fabric tested as a blank test without using any chemicals. The mortality rate is the value after being left for 7 days and then left for 1 day in a natural state.

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Claims (1)

[Claims] 1. A feeding damage suppressant for wool pests comprising 10-methyl undecylenate, 10-ethyl undecylenate, or both as active ingredients.