JPH09263503A - Aphid repellent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aphid repellent preventing propagation of a virus accompanying a solution-sucking action by inhibiting approach of an aphid, and having high safety and giving slight effect to the environment because of a substance wholly derived from plant without requiring to directly spray to the plant body. SOLUTION: This aphid repellent contains at least one kind selected from the group of 1,8-cineole, α-pinene, (d,l)-camphor, α-terpineol, borneol and bornyl acetate as an active component.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a repellent for aphids, which are important pests of agricultural crops and horticultural plants.

[0002]

Aphids not only cause growth inhibition and deterioration in quality of agricultural products and horticultural plants by sucking and colonizing, but also cause great damage by transmitting viruses. In order to exterminate these aphids, organic phosphorus insecticides, carbamate insecticides, pyrethroid insecticides and the like are used.

At present, the control of aphids is carried out by chemically synthesized pesticides. These pesticides can suppress the reproduction of aphids, but cannot prevent the primary transmission of the virus. Also, considering the effects of spraying these pesticides on workers and consumers who eat them, and on the environment,
How to reduce the use of chemically synthesized pesticides is now an important issue. Furthermore, since this pest passes through several tens of generations per year, there is a problem that drug resistance easily develops.

By the way, some of the essential oils of herbs are known to have insecticidal activity and insect repellent activity. For example, rosemary oil is known to have insecticidal activity against several beetles. However, it was not known that this oil had the effect of inhibiting the access of aphids. Also, d, l-camphor has been widely used as an insect repellent since ancient times, but it was not known to have an action of inhibiting the access of aphids. Substances that have the effect of inhibiting aphid access include:
Methyl salicylate and isothiocyanate, (-)-(1R, 5S)-
Each Miltenal is only known to be effective against some species of aphids.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional aphid control technology, and specifically, to utilize the components contained in the essential oils of herbs. To provide a means of repelling aphids.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the present inventors have searched for a substance that inhibits aphid access by drifting an odor without being applied to crops. That is, when the repellent action against the aphid of the odor of its non-host plant was examined using the green peach aphid, which is one of the representative harmful aphids, and the aphid, which harms allium, the essential oil of rosemary showed that It was found to inhibit. Therefore, when the main components of this essential oil were also examined, it was found that 1,8-cineole, α-pinene, d, l-camphor, α-terpineol, borneol, and bornyl acetate have an action inhibiting effect, and the present invention was completed. Came to do. That is, the present invention is 1,8-
An aphid repellent comprising at least one selected from the group consisting of cineole, α-pinene, d, l-camphor, α-terpineol, borneol, and bornyl acetate as an active ingredient.

Hereinafter, the present invention will be described in detail. The aphid repellents of the present invention include 1,8-cineole, α-pinene, d,
It contains at least one selected from the group consisting of l-camphor, α-terpineol, borneol, and bornyl acetate as an active ingredient.

1,8-cineole, α-pinene, d, l-camphor, α-terpineol, borneol, and bornyl acetate are either isolated and purified from rosemary oil or chemically synthesized. May be used,
A commercially available reagent may be used.

1,8-cineole of the present invention, α-pinene, d,
l-camphor, α-terpineol, borneol, and bornyl acetate are soaked in an adsorbent such as a sustained-release agent or the like and placed in a cultivation facility such as a field or greenhouse, or a surfactant, liquid or It is used in the form of an emulsion, granules, powder, wettable powder, aerosol or the like in combination with an auxiliary agent such as a solid carrier and sprayed on plants. When used by spraying on plants, it is desirable to dilute the active ingredient to about 2% of the total amount, and to add a material that provides a sustained release effect to these,
The effect can be sustained by making it foamy. INDUSTRIAL APPLICABILITY The present invention can be used not only for agricultural crops but also because it is highly safe, and can be easily used at home and for ornamental plants and vegetable gardens.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.

[0011]

【Example】

(Device used for test) The test was performed using the device shown in FIG. This device was developed by Sakuma and Fukami and was used as an olfactometer for cockroaches (Applied Entomology a
nd Zoology, Vol. 20, 387-402), with a slightly different pattern for aphids. The device consists of acrylic pipes and stainless steel wire passages for air flow. Make a hole in the side wall of the vertical pipe (A), and pierce it with the horizontal pipe (B) so that it crosses the cross. The aphids are first placed in a container (C) at the bottom of a vertical pipe. The aphid goes up the wire (D) rising from the center of the container, enters the horizontal pipe, and reaches the branch point (E) of the wire. The aphid whose direction is selected at the branch point travels on the wire (F) along the axis of the horizontal pipe and is finally accommodated in the traps (G) at both ends. The test substance is placed in either one of the sample chambers (H), and the other one is used as a control as a control. Since air is sucked in from above the vertical pipe, the air that has passed through the sample chamber of the control section or the treatment section is combined at the branch point.

(Method of Treating Test Substance) When a plant is used as a sample, a filter paper (Advante) in which 4 g of each test plant and 1.5 ml of distilled water are soaked in the sample chamber on the treatment section side
(c, No. 2, 90 mm), and three filter papers impregnated with 1.5 ml of distilled water were placed in the sample chamber on the control side. If two types of test plants are used in combination, 4
Each g was placed in the sample chamber. When investigating the effect of the combination of the odor of the host plant and the odor of the test substance, in the sample room on the treatment section side, each test plant and the sustained release agent (EVAFREX 250-C) soaked in the test substance for 20 hours were used. , Soda fragrance), and 10 untreated sustained-release preparations were added to the sample room on the control side.

When investigating the effect of only the test substance, in the case of negi aphids, a piece of filter paper (Advantec, No. 2, 1 cm x
2 cm) containing 10 μl of the substance soaked in the sample chamber of the treated section and a piece of untreated filter paper in the sample chamber of the control section. However, for a solid substance at room temperature, 5 g was dissolved in 20 ml of ethanol, and 40 μl of this solution was impregnated in a piece of filter paper and air-dried. At this time, the filter paper piece in the control group was treated with only 40 μl of ethanol and air-dried. Regarding the green peach aphid, 10 tablets of the sustained release agent immersed in the test substance for 20 hours were placed in the treated group, and 10 tablets of the untreated sustained release agent were placed in the control group. As for the solid material at room temperature, thin paper (Kimwipe, Jujo Kimberley Co., Ltd.) containing 0.5 g of the substance was placed in the treatment section, and only the thin paper was placed in the control section.

(Inspected insects) As aphid aphids, wingless insects were used, and for green peach aphids, 30 reptiles were used, one for each.

(Test Reagents) Wako Pure Chemical Industries, Ltd. 1,8-cineole (85%), α-pinene (90%), β-pinene (97%), d-(+)-limonene (95%) ), Α-terpineol (99%), borneol, bornyl acetate (95%) Tokyo Chemical Industry d, l-camphor (95%), linalool (99%), myrcene Aldrich Chemical Company, INC. (+)- Camphene (80%) Sigma Chemical Co. (-)-trans-caryophyllene * (),% is reagent purity. Anything not listed is unknown.

(Test conditions) The test was carried out under dark conditions, and two hours after the start of the test, the number of aphids in the traps of each of the treated group and the control group was recorded and compared using the t-test.

(Experimental results)

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

[Table 3]

[0021]

[Table 4]

[0022]

[Table 5]

(Note) *, ** in [Table 1] to [Table 5]
Indicates that there is a significant difference at P <0.05 and 0.01 by the paired t-test, and NS indicates that there is no significant difference.

First, green onion, the host of the Nephia aphid,
It was confirmed that the odor of Chinese chive had an attractive effect on this aphid (Table 1). On the other hand, the smell of rosemary was found to have a strong repellent effect on this aphid. It was also found that the aphid was repelled by the smell of rosemary even if it smelled of leek or Chinese chive. Furthermore, the essential oil of this plant also showed a strong repellent action against this aphid, and it was found that the aphid was repelled by the presence of the odor of this essential oil even if it had the scent of leek or chive (Table 2). Furthermore, when the same test was performed on the components of this essential oil, 1,8-cineole, α-pinene, d, l-camphor, α-terpineol, borneol, and bornyl acetate were found to have repellent activity (Table. -3). In the green peach aphid, no attractant of the smell of tobacco from the host was observed (Table 4). Rosemary oil was also found to have a repellent effect on the green peach aphid (Table 5). 1,8-cineole,
When α-pinene and d, l-camphor were subjected to the same test, the repellent effect was observed in both cases, as in the case of Neaphis aphid.

[0025]

INDUSTRIAL APPLICABILITY The aphid repellent of the present invention can prevent the transmission of virus associated with sucking behavior by inhibiting the access of aphids. In addition, since it is a plant-derived substance and does not need to be directly applied to the plant body, it is highly safe and has little impact on the environment.

[Brief description of drawings]

FIG. 1 is a diagram showing an apparatus used for a repellent test.

Claims (1)

[Claims] 1. An active ingredient comprising at least one selected from the group consisting of 1,8-cineole, α-pinene, d, l-camphor, α-terpineol, borneol, and bornyl acetate. Aphid repellent.