JPH02279614A - Substance for inhibiting feeding action of japanese pine sawyer - Google Patents

Abstract

PURPOSE:To provide the subject repellent composed of an extract of a material collected from the tree of family Fagaceae and exhibiting the repelling effect over a long period. CONSTITUTION:The resin, leaf, flower, pericarp, fruit, branch, trunk or chopped trunk of a tree of family Fagaceae is extracted by a conventional process with an organic solvent, the extraction residue is removed by filtration and the solvent is distilled away from the filtrate or the filtrate is concentrated to obtain an extract. The extract is applied to pine trees at a rate of 0.1 to 50g/m<2>. The infection with pine wood nematode can be most effectively prevented by applying the extract immediately before or after the start of the first feeding action (the pine wood nematode is transmitted in this stage) after eclosion of the imago of Japanese pine sawyer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applicability] The present invention relates to a substance that repels the accumulation activity of adult beetles. More specifically, the present invention relates to a substance made of an extract from a member obtained from a Fagaceae plant, and a repellent for repelling adult insect locust activity, which contains this substance as an active ingredient.

[Conventional technology and its problems] Pine trees, which are responsible for forestry, are not only used for lumber production, but also have public benefits such as water resource replenishment, mountain collapse prevention, national land conservation such as coastal wind and sand prevention, and landscape and scenic beauty maintenance. It has a function and widely contributes to society and culture.

However, in recent years, pine trees that have such public functions have been dying one after another due to the pine tree nematode carried by the pine beetle (adult), which has become a major problem in recent years.

The mechanism by which pine trees die due to the cooperative activities of the pine beetle and the pine tree nematode is widely known. In other words, when an adult pine beetle with a large number of nematodes attached to it performs a depositing activity on a phase change, the pine nematode invades from the eccentric part due to the bite of the adult of the phase change, and the pine tree nematode enters the converted body. It is said that it causes abnormal growth of pine trees and causes them to wither and die.

Currently, the most widely used method of preventing pine blight is to apply insecticides during the feeding season of the adult pine beetles (transmitted by the pine nematode during this period) or preventatively spraying them on the pine forest. It is being done. In particular, helicopters have begun spraying over large areas, and the project to prevent pine wilt has shown some results.

However, the reality is that there are many restrictions on spraying insecticides by helicopter near residential areas or in parks where many people gather. In the social environment described above, there are more than 0 technological development issues that require the development of pest control agents that act specifically on specific pest populations and have fewer adverse effects on other pests. In view of the above, the present inventors have conducted various studies in order to develop a pine wilt control agent that has less adverse effects on the environment.

In other words, focusing on the fact that adult beetles of the pine tree do not feed on plants other than pine, cedar, cypress, etc., substances that inhibit the accumulation of adult beetles of the pine beetle are added to woody plants other than pine, cedar, cypress, etc. We conducted repeated studies on the assumption that it may contain. As a result, it was discovered that a solvent extracted substance of Fagaceae trees, particularly Sawtooth oak or Salmonella edulis, exerts the effect of repelling the feeding activity of adult beetles for a long period of time.Based on this knowledge, the present invention was completed. did.

As is clear from the above description, an object of the present invention is to propose a substance that repels the accumulation activity of adult beetles. Other purposes will become clear from the description below.

[Means for solving technical problems] The present invention has the following configurations (1) to 5).

(1) A substance that repels the accumulation activity of adult beetles of the pine beetle, which is made of an extract obtained from parts obtained from plants of the Fagaceae family.

(2) A repellent for the feeding activity of adult beetle beetles, which contains as an active ingredient an extract obtained by extracting from a member obtained from a Fagaceae plant.

(3) Fagaceae plants include beech, Japanese beech, chestnut, Quercus,
The above-mentioned item 1 or 2 is one or more plants selected from Quercus oak, Sawtooth oak, Abemaki, Oak oak, Japanese oak, Ubamegashi, Shirakashi, Arakashi, Yokomegashi, Hiryu oak, Aka oak, Tsutabane oak, and Ujirogashi.
Repellent substances or repellents as described in Section.

(4) Item 1 or 2 of the above ¥%, in which the parts obtained from a Fagaceae plant are obtained from resin, leaves, flowers, pericarp, fruits, branches, trunks, or roots of the plant. The repellent substance or repellent described in .

(5) By applying to pines a repellent for the insertion activity of the adult beetles of the pine beetle, which contains an extract obtained by extracting from parts obtained from the Fagaceae plant body as an active ingredient. How to prevent damage to pine trees.

The extract of the present invention is produced as follows. A part of a Fagaceae plant, preferably a tree such as a leaf branch, bark, or woody part of Sawtooth oak or Polygonum elegans, is shredded, an organic solvent is added to it, a sufficient extraction process is carried out by a conventional method, and then the extraction residue is filtered. Separate and distill off the solvent from the filtrate or mFm
It can be obtained by

Organic solvents used for extraction include alcohols such as methanol, ethanol, propatool, and octatool; polyols such as propylene glycol and hexylene glycol; ethers such as ethyl ether and propyl ether; ketones such as methyl ethyl ketone and acetone. ; Halogenated hydrocarbons such as chloroform, esters such as ethyl acetate, hydrocarbons such as hexane, kerosene, benzene, etc. are used. Among these organic solvents, getones such as acetone and hydrocarbons such as hexane and kerosene are preferred.

The extraction method and the method of removing part or all of the solvent from the extract (concentration method) are the same as known methods.

The repellent for adult insects of the present invention includes:
It is used in the form of oil or emulsion, and it is also possible to apply the extract directly.The amount of tree repellent to be applied may be determined as appropriate depending on the application time and application method, and there are no particular restrictions. However, if the extract is used against pine, 0.
It is desirable to spray at a rate of 1 g/m2 to 50 g/m' or more.

The main rule is that by spraying on pines immediately before or after the adult beetles begin their first accumulation activity (transmitting the pine nematode at this time), the feeding activity of the adult beetles can be applied. It is the most efficient way to prevent pine nematode infection.

Furthermore, the powder may be used as appropriate during the entire life span of the adult longhorn beetles, since the feeding activity of the adult longhorn beetles and the infection of the nematode nematodes caused by this persists until the death of the adult longhorn beetles.

The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.

Example 1 (1) Preparation of a repellent for pine beetle deposits Sawtooth oak,
Or, after shredding 500g of each of the bark of C. edulis, mix hexane + acetone = 1 ” 1 ?a mixture 2[1
Extraction was carried out by immersion in 00ml for one week. Filter the extract,
The filtrate was concentrated. Thereafter, the extracted mixture was diluted 10 times with hexane + acetate and diluted with hexane + acetate to prepare a pine beetle repellent (hereinafter referred to as repellent oil).

(2) Test for repelling effect of feeding on the pine beetle. Filter paper (diameter 11 cm) was impregnated with 5 m of the previously obtained repellent aerobic oil, Q. After air-drying, 5 mA of the test extract was further added to increase the feeding activity of the pine beetle. After that, it was air-dried. The filter paper was made into a cylinder with a diameter of about 1 CIll, and a container (top diameter of 13 cm) was formed.
m, bottom diameter 11c+e, height 5cm). One adult beetle beetle raised indoors at 25° C. was placed in each container, and the number of bite marks after 24 hours is shown in Table 1.

Table - As is clear from Table 1, pine extract area and ginkgo +
Many bite marks were seen in the pine area, whereas there were clearly fewer bite marks in the oak + pine and Y. cerevisiae + pine areas, and the oak and Physcomys cerevisiae extract areas inhibited the placement activity of the pine beetle. Since this test was conducted in a confined environment, there were many bite marks in the pine extract solution group, which was the control group, and some overlapped bite marks, so it is thought that the actual number of bite marks is even higher.

Example 2 (Residual effect test for repellent effects on deposits) (1) Preparation of pine beetle repellent After shredding 500 g of the bark of Sawtooth oak and S. cerevisiae, the bark was immersed in a mixture of hexane + acetone = 1 + 1 at 20 [10 mA for one week]. Extracted. The extract was filtered and the filtrate was concentrated. After that, the extract 1 agricultural shrinkage liquid was diluted 10 times with a mixture of hexane + acetone - 1 + 1, and a pine beetle repellent (
(hereinafter referred to as a repellent oil agent) was prepared.

(2) Residual effect test for repellent effect on pine beetle pileup A filter paper with a diameter of 110 layers was impregnated with 5 ml of the previously obtained repellent oil agent, air-dried, and then left indoors for 14 days. after that,
In order to increase the deposition activity of P. chinensis, 5 mβ of hexane extract of the transfer bark was added and then air-dried.

Make the filter paper into a cylinder with a diameter of 1 cm and use it as a container (top diameter 13 cm).
m, bottom diameter 11 cm, height 5 cm). One adult female pine beetle raised indoors at 25°C was placed in each container, and the number of bite marks after 24 hours was recorded in Table 2.
It was shown to.

In order to compare the residual effect, a filter paper with a diameter of 11cI5 was
After impregnating and air-drying 5mj2 of oil, 5IIIL of transfer bark hexane extract was further added, and after air-drying, a similar test was conducted immediately.

Table 2: The extracts of Sawtooth oak, Polygonum cerevisiae, and extracts showed activity even after being exposed to the air for 14 days, and can be said to be able to withstand use as a pine wilt preventive agent.

Fruit b1ξ Example 3 (1) Preparation of a repellent for pine beetle and chestnut beetle After cutting 500 g of beech and chestnut bark, hexane +
Extraction was carried out by immersion for a week at 21,100 mA of acetone = +, + i mixed solution. The extract was filtered and the filtrate (QIIii
Shita. After that, extract the concentrated liquid with hexane + acetone = 1 +
The mixture was diluted 10 times with 1 mixed liquid to prepare a repellent for the pine beetle (hereinafter referred to as repellent oil agent).

(2) Test of repellent effect on the device for repelling the pine tree longhorn beetle A filter paper (diameter 11 cm) was impregnated with 5 m℃ of the previously obtained repellent oil and air-dried. In order to increase the device activity of the pine tree longhorn beetle, 5 m of test bark hexane extract, Q. After addition, it was air-dried.

Make the filter paper into a cylinder with a diameter of 1 cm, and use it in a container (top diameter + 3 cm).
c+n, bottom diameter 1 ice, height 5 cm). Into this container, one adult pine beetle raised indoors at 25°C was placed, and the number of bite marks after 24 hours was recorded in Table 3.
It was shown to.

Table-3 As is clear from Table-3, pine extract and ginkgo +
In the pine ward, many bites are seen, whereas in the chestnut + pine,
There are clearly no small bite marks in the beech + pine area, which can be said to be inhibiting the accumulation activities of beech and chestnut extraction residues.

Example 4 (1) Preparation of a repellent for pine beetle and chestnut tree barks Each of 500 g of beech and chestnut bark was shredded and extracted by immersion in 2000 mJ2 of a mixed solution of hexane + acetone m1 + 1 for one week. The extract was filtered and the filtrate was concentrated. Thereafter, the extracted concentrate was diluted 10 times with a mixture of hexane + acetone = 1 + 1 to prepare a pine beetle repellent (hereinafter referred to as repellent oil agent).

(2) Repellent oil agent 5QIJ2 previously obtained on filter paper (diameter Ham)
After being impregnated and air-dried, it was left indoors for 14 days. After that, in order to increase the activity of the device for the pine beetle, a test bark hexane extract of 5111. After adding Q8, it was air-dried.

The filter paper was made into a cylinder with a diameter of j cm and placed in a container (top diameter 1 cll, bottom diameter 11 cm wide and high). Each container was filled with one adult beetle beetle raised indoors at 25° C., and the number of bite marks after 24 hours is shown in Table 4.

Table 4 Chestnut and beech extracts showed activity even after being exposed to the air for 14 days, and can be said to be able to withstand use as a pine wilt preventive agent.

Below Up Patent applicant: Sankei Chemical Co., Ltd. Agent Patent Attorney Katsuhiko Nonaka

Claims (5)

[Claims] (1) A substance that repels the feeding activity of adult beetle beetles, which is made of an extract obtained from parts obtained from Fagaceae plants. (2) A repellent for the feeding activity of adult beetle beetles, which contains as an active ingredient an extract obtained by extracting from a member obtained from a Fagaceae plant. (3) Fagaceae plants include beech, Japanese beech, chestnut, Quercus,
The repellent according to claim 1 or 2, which is one or more plants selected from Quercus oak, Oak oak, Japanese oak, Oak oak, Japanese oak, Ubamegashi, Shirakashi, Japanese oak, Japanese oak, Hiryu oak, Japanese oak, Tsukubane oak, and Japanese oak Substance or repellent. (4) The parts obtained from a Fagaceae plant are obtained from resin, leaves, flowers, pericarp, fruits, branches, trunks, or roots of the plant. The repellent substance or repellent according to item 2. (5) A method for applying to pine trees a repellent for the feeding activity of adults of the pine beetle, which contains as an active ingredient an extract obtained by extracting from parts obtained from plants of the Fagaceae family. How to prevent feeding damage.