JP2002087915A - Repellent for ant and insecticide using peel oil of citrus fruits and method of preparing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repellent for ants and insecticide using a natural vegetable ingredient safe to human body without causing environmental pollution or the like and effective for a long time. SOLUTION: This repellent for ants and insecticides comprise a liquid composition obtained by dissolving 5-60% (w/w) of polystyrene such as styrene foam or the like in a peel oil of citrus fruit. For example, a long term repellent action for ants and an insecticide effect are retained on a surface or inside of a timber, concrete, block and metal by spraying, applying, injecting or impregnating the polystyrene solution into a spot at where an insect damage or intrusion of a noxious insect is predicted while adjusting its concentration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the provision of termite and insect repellents which are extremely safe for the human body and environment.

2. Description of the Related Art Most termite and insect repellents are chlorpyrifos, permethrin, phoxime,
It is a highly toxic chemical, such as petroleum-based solvents, and is sprayed or applied at high concentrations under floors and under soil. These components are extremely harmful to the human body and the environment, and it is said that the termite termiticide is the most damaging of the sick house syndrome, which has recently been regarded as a problem. There are concerns about harm to the human body, such as headache, diarrhea, nosebleeds, vomiting, dizziness, urticaria, and malaise, as well as harm to the environment due to residual drugs.

[0002]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a termite and insect repellent which is effective for a long period of time using natural plant components which are safe for the human body and do not cause environmental pollution.

SUMMARY OF THE INVENTION The present invention has been made as a result of diligent efforts to achieve the above objects. The termite and insect repellents of the present invention are characterized by comprising a liquid composition obtained by combining citrus skin oil and polystyrene.

According to the present invention, polystyrene (whether foamed or not) is added to citrus skin oil in an amount of 5% to 60% (w / w).
It is a dissolved liquid composition that is sprayed, applied, injected, and immersed in wood, concrete,
It is a novel citrus skin oil / polystyrene mixed composition characterized by retaining the termiticidal and insect repellent effects of citrus skin oil on the surface and inside of a block or metal. By drying after treatment with the mixed composition of the present invention, the termite and insect repellent components are incorporated into the polystyrene resin,
It is also characterized by forming a coating and maintaining the effect for a long time. This film is made of polystyrene resin and has both water repellent and waterproof effects.

As another means of the present invention, the present inventors have previously developed a polystyrene foam reducing agent comprising citrus skin oil and ethanol. Included in the present invention.

Embodiments of the present invention will be described below, but the present invention is not limited thereto. Citrus skin oil used as a main component of the present invention has a specific gravity of 0.842,
PH 4.2, flash point 48 ° C, vapor pressure 2mmHg / 20 ° C
It has strong bitterness, is colorless, has a peculiar citrus flavor, and is insoluble in water. The production method is obtained by extracting an oil component from the skin of citrus fruits such as grapefruit, orange, and lemon by a cold soaking method, and is generally known as citrus oil.

A terpene-based natural organic compound containing, as main components, linalool, sabinene, α-pinene, D-limonene, citronellal, etc., and has a slow but effective insecticidal, insect repellent, repellent and reproductive inhibitory effect against insect pests. It has the bioactive power to make it. However, it is widely used as a food additive for the purpose of flavoring and is harmless to the human body,
It does not pollute the environment. In addition, polystyrene is widely used as a cushioning material for various plastic products and foamed products, and has the properties of being tasteless, odorless, non-toxic, and not releasing environmental hormones. Substance. The present invention is a liquid composition obtained by dissolving 5% to 60% (w / w) of polystyrene (whether or not foamed) in citrus skin oil. The surface and interior of wood, concrete, block, and metal are treated by spraying, applying, pouring, and dipping by adjusting the temperature.

[0006] After treatment, it is characterized in that the termite and insect repellent components are incorporated into polystyrene resin to form a coating film by air drying after the treatment, and the effect is maintained for a long time.
This film is made of polystyrene resin and has both water repellent and waterproof effects. In addition, the inventors have previously developed a polystyrene foam volume reducer composed of this citrus skin oil and ethanol, and it has been made possible to use the polystyrene after volume reduction as a raw material of the present invention. Being able to contribute is extremely costly and socially beneficial.

[0007]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments. Example 1 A residual contact test was conducted using a liquid composition prepared by dissolving 20 g of polystyrene in 100 ml of citrus skin oil. The test insects were A: house termite (worker: 15), B: black ant (worker: 15) , And. A filter paper was spread on a petri dish having a diameter of 7 cm, 2 ml of the liquid composition (a) was dropped, and the state after that was observed. In A, abnormalities were observed immediately after dropping, and 2 test animals were knocked out in 3 minutes and 8 test animals in 10 minutes, and all test insects were knocked out in 40 minutes. Similarly, B also showed abnormalities immediately after dropping, and 3 animals at 10 minutes, 7 animals at 25 minutes, and all test insects were knocked out at 55 minutes and 85 animals were knocked out.
I was fatal in minutes.

Example 2 Test of insecticidal efficacy against black cockroaches (adult: n = 5) by the topical application method. The liquid composition (a) was diluted with acetone so as to have a predetermined amount per cockroach, and dropped between legs of the test insect, and the mortality after 24 hours was determined. Liquid volume per animal (mg) Mortality rate after 24 hours (%) 100 100 50 80 30 60 15 20 LD50 of liquid composition (a) against black cockroach is 1
It was between 5 mg and 30 mg. Similarly, for house termites (workers: n = 10), the LD50 value is 1.
2 mg.

Liquid volume per animal (mg) Mortality rate after 24 hours (%) 0.50 0.80 1.0 30 1.2 40 1.4 60 1.6 70 1.8 90 Example 3 Insecticidal effect of wood chips treated with liquid composition (a) on house termites. Cut out a log with a diameter of 75 mm 2
One piece of wood is used as a sample. The liquid composition (a) was applied twice to C in the same manner as applying a normal paint, and was completely dried. The weight after application was 154 g. The weight of the untreated wood piece D was 126 g, which was used as a comparative sample with the wood piece C. The breeding boxes E and F, in which about 300 termites form colonies in the soil, are prepared.
A piece of wood D was added to F, and the change in the wood after 30 days was observed.
Water was sprayed on the soil and wood pieces every day so that the humidity in the breeding box was always appropriate, and the temperature was room temperature (25 ° C.).

After 30 days, the wood chips C did not show any change in terms of food damage due to termites, and the weight after drying was the same as that at the time of feeding, and there was no change. Wood piece D confirmed a large number of damages (holes) at locations that were in contact with the soil. The skin of the piece of wood was brittle and rotten, and the weight after drying was 118 g. In the breeding box F after removing the wood pieces D, many ant trails were confirmed on the soil surface in contact with the wood pieces D. On the other hand, wooden box C of breeding box E
No ant path was found on the soil surface that had contacted the hills, and colonies were formed at locations avoiding wood chips.

[0011]

According to the above-mentioned means, it is possible to provide a termite and insect repellent which is effective for a long period of time by using natural plant components which are safe for the human body and do not cause environmental pollution.

Claims (2)

[Claims] 1. A novel citrus skin oil / polystyrene mixed composition comprising 5% to 60% (w / w) polystyrene (whether or not foamed) is dissolved in citrus skin oil. 2. The novel citrus skin oil / polystyrene mixed composition according to claim 1, wherein the citrus skin oil contains 5% -60% of polystyrene (whether or not foamed).
% (W / w) is a liquid composition dissolved in wood, concrete, block and metal by spraying, coating, pouring and immersing by controlling the concentration of polystyrene in places where there is a risk of invasion of pests and insects. Use of a novel citrus skin oil / polystyrene mixed composition characterized by having a termiticidal and insect repellent action on the surface and inside.