JPH07179303A - Fumigation method - Google Patents

Abstract

PURPOSE:To provide a fumigation method capable of safely and effectively controlling insect pests without chemically damaging alive plants, vegetables and fruits in a closed container. CONSTITUTION:A compound of the formula (X, Y are H, a halogen; R is a 1-4C alkyl, vinyl, allyl) is applied to insect pests in a closed container. This compound can be applied to alive plants, vegetables or fruits in a concentration of >=1g/m<2> at a temperature of 5-40 deg.C for 1-72hrs in a closed container to kill >=70% of all insect pests without generating chemical damage on the alive plants, vegetables and fruits, but is preferably applied in a concentration of 2-50g/m<3> at a temperature of 10-30 deg.C for 3-48hrs. The compound of the formula includes allylethylether, allylvinylether, diallylether, 2-bromo-2-propenylallylether, and 2-chloro-2-propenylvinylether.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fumigation method applied to harmful insects in a closed container.

[0002]

2. Description of the Related Art In recent years, the number of imported and exported living plants has been increasing year by year, and the pests attached to them have also become diverse. However, currently three quarantine agents in Japan are methyl bromide, hydrocyanic acid and aluminum phosphide, all of which are highly toxic to humans and animals.
In addition, methyl bromide is an excellent fumigant, but it has a problem that it easily causes chemical damage to raw plants and fruits and vegetables. Although hydrocyanic acid has an excellent effect on Hemiptera, such as scale insects and aphids, it has no effect on mites and Lepidoptera, and its use range is limited, and it is water-soluble.
There is a problem that it is difficult to maintain the concentration when fumigating raw plants and fruits and vegetables. Further, aluminum phosphide requires a long time for fumigation, and has a problem that it is not suitable as a chemical for effectively controlling pests in a short time such as fresh plants and fruits and vegetables. In addition, agricultural and horticultural use of the facility also shows growth in long legs,
From the cultivated environment, pests and the like, which are harmful to crops, are likely to occur throughout the year, and the control method is mainly applied by spraying chemicals. However, this method is not only time-consuming, but also tends to cause unevenness because it cannot be evenly distributed over the leaves, resulting in the survival of pests. In addition, since these pests have a short life cycle, they must spread quickly inside the facility, and as a result, they often have to be sprayed with the drug, which makes it difficult to administer the drug and the drug tends to remain on fresh plants and fruits. have.

[0003]

Therefore, the present inventors have made earnest studies on a fumigation method for controlling pests safely and effectively without causing chemical damage to living plants and fruits and vegetables in a closed container.

[0004]

Means for Solving the Problems The present inventors have made the following general formula [I]

[0005]

[Chemical 2]

(Where X and Y are hydrogen atoms or halogens, R is an alkyl group having 1 to 4 carbon atoms, a vinyl group or an allyl group) and fumigated in a closed container to give fresh plants and fruits and vegetables. It was found that there is no phytotoxicity and that pests can be effectively controlled, and the present invention has been completed.

Specific examples of the compound represented by the general formula [I] include allyl methyl ether, allyl ethyl ether, allyl propyl ether, allyl butyl ether, allyl vinyl ether, diallyl ether, 2-chloro-2-propenyl methyl ether. , 2-chloro-2-propenylethyl ether, 2-chloro-2-propenylpropyl ether, 2-chloro-2-propenylbutyl ether,
2-chloro-2-propenyl vinyl ether, 2-chloro-2-
Propenyl allyl ether, 3-chloro-2-propenyl methyl ether, 3-chloro-2-propenyl ethyl ether, 3-chloro-2-propenylpropyl ether, 3-chloro-2-propenylbutyl ether, 3-chloro-2-propenyl Vinyl ether, 3-chloro-2-propenyl allyl ether, 2,3-dichloro-2-propenyl methyl ether,
2,3-dichloro-2-propenylethyl ether, 2,3-dichloro-2-propenylpropyl ether, 2,3-dichloro-
2-propenyl butyl ether, 2,3-dichloro-2-propenyl vinyl ether, 2,3-dichloro-2-propenyl allyl ether, 2-bromo-2-propenyl vinyl ether,
2-Bromo-2-propenyl allyl ether, 2,3 dibromo
-2-propenyl vinyl ether and 2,3 dibromo-2-propenyl allyl ether. Of these, allyl ethyl ether, allyl propyl ether, diallyl ether and 2-chloro-2-propenyl allyl ether are preferable, but not limited thereto.

Pests for which these compounds are particularly effective include mites, hemiptera such as aphids, whitefly, whitefly, thrips of thrips, lepidoptera such as diamondback moth, migratory beetle, and armyworm. The quarantine plants include flowers such as chrysanthemums and orchids, fruits and vegetables such as mandarin oranges, pears and grapefruits, vegetables such as okra and asparagus, and agricultural and horticultural plants such as mandarin oranges, naps such as grapes and tomatoes. , Cucumber, eggplant and other vegetables napped, chrysanthemum,
The napped hair of flowers such as roses, carnations and orchids can be mentioned. (Hereinafter, these plants, fruits and vegetables are referred to as "living plants".) The compound represented by the general formula [I] is added to the harmful insects attached to these living plants with a gas having a concentration of 1 g / m ³ or more in a closed container at a temperature of 5 to 5.
By applying at 40 ° C for 1 to 72 hours, 70% or more of all pests can be killed without causing phytotoxicity to living plants, but at a concentration of 2 to 50 g / m ³ , a temperature of 10 to 30 ° C, and ³ to 48.
It is preferable to apply the time.

The closed container referred to here is a container that can be used for fumigation of living plants, for example, a container, a warehouse, a silo, a vinyl, etc., which is covered with gas to prevent gas from leaking, and a container for that purpose. Quarantine containers, or glass greenhouses used for growing crops,
Agro-horticultural containers such as greenhouses, plastic houses, and other house-types, vinyl tunnels, plastic tunnels, and other tunnel-type containers, and the equipment used in connection therewith. In addition, during cultivation, columns, nets, chains, strings,
It includes wires, curtains, nursery boxes, soil, straw, and various pipes.

Any method of gasification may be used for using the compound represented by the general formula [I] of the present invention in a closed container, but preferably, it is put in an evaporation container and spontaneously evaporated, or spontaneously by spraying. A method of vaporizing or a method of vaporizing with a vaporizer having a heating device is preferable. Also,
The aerosol type may be hermetically sealed after being sprayed into the house or the tunnel.

[0011]

EXAMPLES The effects of the present invention will be described below with reference to Examples.
It is not specific to this.

[Examples 1 to 30, Comparative Examples 1 to 4] About 1 m
Put pests and living plants in the fumigation box of ³ and gasify the compound shown in Table 1 in the specified dose (g / m ³ ) and fumigate at the temperature (° C) and time (Hr) shown in Table 1. Conducted to investigate the insecticidal rate of pests and phytotoxicity to living plants. The results are shown in Table 1. The insecticidal rate of the pests was determined by taking out the pests from the container after fumigation and leaving them in a thermostat at 25 ° C. for 2 days to determine whether they were alive or dead. For phytotoxicity, take out the raw plant from the container after fumigation and judge the dead condition after leaving it at room temperature for 7 days.
About 2/3 of the withered state was 2+, about 1/2 of the withered state was +, those that could not be compared with the control were ±, and those with no observed drug damage were −.

These compounds are effective against various pests at 70
It showed a high insecticidal rate of not less than%, and a good insecticidal effect, and it did not cause any phytotoxicity to living plants and was a useful fumigant.

[0014]

[Table 1]

[0015]

EFFECTS OF THE INVENTION By gasifying the fumigant represented by the general formula [I] of the present invention in a closed container, it is possible to effectively control pests attached to living plants without chemical damage. Became.

Claims (1)

[Claims] 1. The following general formula [I]: (However, X and Y are a hydrogen atom or a halogen, R is a C1-C4 alkyl group, a vinyl group, or an allyl group.) The fumigant method characterized by applying to a pest in a closed container.