JPS6039323B2 - Feeding damage inhibitor against wool pests - Google Patents

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 inhibitor for wool pests such as grasshopper, carp moth, Japanese carp beetle, and Japanese carp beetle. The present invention relates to a feeding damage suppressant containing 10-undecylenic acid methyl ester and ethyl ester as active ingredients, which have activities such as action, repellency, and insecticidal action.

As an insect repellent for clothes, naphthalene,
Camphor, paradichlorobenzene, etc. are used, and among them, paradichlorobenzene is the most widely used because it has a strong insecticidal effect and is inexpensive. However, paradichlorobenzene is a type of organic chlorine-based drug, and there is a risk that it may accumulate in living organisms and cause harm, so its use is becoming regulated.

The use of organic chlorine agents aldrin and deldrin, 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 paradichlorobenzene.

For example, tri-isopropyl-S-trioxane or tri-tert-butyl-S-trioxane, nalol, anet-
Insect repellent for wool containing as active ingredients a combination of alcohol, menthol, cinnamic aldehyde, thymol eugenol or their derivatives (Japanese Unexamined Patent Publication No. 50-124436), a cyclic formula with an ether bond and a carbon number of IN Insect repellent containing a compound as an active ingredient (Japanese Patent Application Laid-Open No. 110823/1983),
A sublimation insect repellent containing adamantane, a sublimable hydrocarbon, and a sublimable or volatile polar compound (Special Publication No. 53-121936), an insect repellent containing a combination of naphthalene and thymol as active ingredients. Agent (Samurai Seki 53-1
09938), naphthalene and 2-isopropyl-
Insect repellent for clothing containing a combination of 5-methylphenol as an active ingredient (Japanese Unexamined Patent Publication No. 54-3262), Insect repellent for clothing containing acetoxime as the main ingredient (Special Publication No. 54-10 Sho.
1425), an insect repellent containing as an active ingredient an aromatic compound having a substituent such as a carbon chain having a branch at the Q-position (Tokubatsu Sho 54-110321), 1-
Aromatic insect repellents containing carpon as an active ingredient (Japanese Unexamined Patent Publication No. 55-1922) have been proposed. However, all of these insect repellents are more expensive than paradichlorobenzene, their insect repellent effects are significantly inferior, or their sustainability is poor due to their high volatility.
Also, it has drawbacks such as significant changes over time, and cannot be said to be fully satisfactory in practical terms.

In view of these circumstances, the present inventors have developed a practical insect repellent that is inexpensive, has an excellent insect repellent effect, has a long-lasting effect, and is highly safe. , methyl 10-undecylenate, and ethyl 10-undecylenate as active ingredients, it was discovered that the object could be achieved, and based on this knowledge, the present invention was completed.

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

Methyl 10-undecylenate and ethyl 10-undecylenate, which are the active ingredients of the feeding damage inhibitor of the present invention, have the chemical structural formula CH2=CH-(CH2)8-COOR (R in the formula is a methyl group or an ethyl group. ) is an unsaturated fatty acid ester with a flavor similar to quince,
It is used as a flavor 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.

The boiling points of methyl undecylenate and ethyl 10-undecylenate are 250 oo and 265°C, respectively.
Despite its high vapor pressure and low vapor pressure, it has a strong ability to suppress 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. Furthermore, due to its low vapor pressure, it has excellent sustainability of its ability to suppress feeding damage. In the feeding damage inhibitor of the present invention, methyl 10-undecylenate or ethyl 10-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 Shikagel, Yuruk, cloth, or paper.

The feeding damage suppressant of the present invention is inexpensive, has an excellent insect repellent effect, has a long-lasting effect, and is a highly safe and practical feeding damage suppressing agent for wool. It is effective in exterminating wool pests such as the Japanese snail beetle.

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

Example: Put methyl 10-undecylenate or ethyl 10-undecylenate at the bottom of a bottle with a capacity of 500 kg, and place 9/10 of methyl 10-undecylenate or ethyl 10-undecylenate 5 cm above the bottle, aged 30 days, average weight 30-35.
10 head larvae and wool standard test cloth (2 c x 2 ka,
A cage containing 40-45 o) was fixed.

Next, the bottles were sealed and left in a constant temperature room at 30 qo and 65% humidity for 7 days, after which the woolen cloth was removed and the amount of feeding damage was measured, and the mortality rate of the insects was determined. 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 estel. In addition, for comparison, tests similar to those in Examples were 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.

Claims (1)

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