JPH041813Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an attracting band for catching and killing tree-boring insect pests, particularly Japanese cedar beetles and the like.

Conventional techniques and their problems Adults of the Japanese cedar beetles escape from the inside of tree trunks from March to May by making holes, move on the surface of tree trunks, prefer dark places, sneak in, and lay eggs under the outer bark. The eggs hatch around 10 days, and the larvae hatch from April to September.
They devour the inside of the tree trunk over the course of a month, and the larvae turn into pupae inside the tree, becoming adults by autumn. Adults overwinter in trees and emerge outside in the spring. The lifespan of an adult is approximately 35 days after escape. The size of this escape hole is the diameter
The holes are approximately 10 mm in diameter, and rotting fungi can enter through these holes, causing discoloration and rot inside the tree trunk.

Therefore, the quality and value of wood (cedar, cypress, etc.) that has been damaged by the Japanese cedar beetle is significantly reduced.

Traditionally, extermination has been carried out using two methods: skin stripping and chemical spraying.

Stripping the bark every time you prune (approximately every three years) eliminates spawning sites, so it is an effective method of extermination.

In addition, chemicals are carefully sprayed on the trunks of cedar and cypress trees three to five times from March to May, one tree at a time.

Both rough skin stripping and chemical spraying have the disadvantage of requiring considerable labor and expense.

Other extermination methods have been proposed, such as impregnating paper with insecticide or wrapping coated insect repellent bands around tree trunks (Forest Epidemic Prevention Forest
PEST Vol 33 No. 2, P. 11-16, 1984), the present inventor conducted tests and found that it was difficult to adjust the gap between the attractant band and the tree trunk, and rain and wind caused
It was found that the paper base material of the repellent band shrinks due to repeated wetting and drying, and the gap between the tree trunk and the repellent band disappears, resulting in a loss of effectiveness during use.

Therefore, the purpose of the present invention is to maintain a certain gap between the insect pests and the insect repellent band during the period when they are moving on the tree trunk surface, and to maintain the insect repellent effect even when exposed to rain and wind. It's about providing bands.

Means to Solve the Problems As a result of extensive studies, the inventors of the present invention and others have found that by fixing a corrugated substrate having a light shielding layer coated or impregnated with an insecticide on one side of a flat substrate. If the insecticidal band is made to retain its wavy shape and is wrapped so that the insecticide-coated surface of the band is in contact with the tree trunk, the wavy shape will not be lost even if exposed to rain and wind for a long period of time, and the band will retain its killing effect. The present invention was completed after discovering that it could be maintained for a sufficient period of time.

That is, as shown in the cross-sectional view in FIG. This is a harmful insect attracting band characterized by being fixed to one side of the belt.

The insecticidal band 1 of the present invention is used by wrapping the wavy-shaped insecticide coating layer 3 side so as to be in contact with the tree trunk 7 as shown in Fig. 2, but during the period of use, the wavy shape of the band Since a certain gap is always maintained between the tree trunk and the insecticide-coated surface of the insecticide band for the adult Japanese cedar beetles to sneak into, the trapping effect is maintained for a sufficient period of time.

Note that the waveform shape of the attractant band according to the present invention is not limited to a smooth shape with rounded uneven portions as shown in the figure, but may have an angular shape with uneven portions (for example, a sawtooth cross section). and rectangular shapes).

In the present invention, paper, pulp molded products, plastic molded products, etc. are used as the corrugated base material, and the paper base material is the simplest. As the paper base material, ordinary corrugated cardboard is sufficient, but weather resistance can be further improved by using a paper base material internally added with a wet strength enhancer.

The thickness of the paper base material can range from 60 to 120 g/m ² , but a thicker one is preferred in order to maintain the wavy shape.

Naturally, the size of the gap formed by the waveform needs to be slightly larger than the size of the pest you are trying to infiltrate, and generally the height of the wave (H in Figure 1) is 4 to 8 mm. The interval between waves (W in Figure 1) is about 6 to 12 mm.

As the flat base material 5, a waterproof liner used for waterproof cardboard (including polyethylene laminated paper, etc.) can be used, and the thickness of the paper is
A suitable weight is 70 to 220 g/m ² , but if it is too thick, it will not be flexible and difficult to handle when wrapped around a tree trunk, so a thinner one is more practical.

The light shielding layer 6 is made by coloring the corrugated base material 3 black or the like, and can be formed by a printing method using black ink, for example.

In the present invention, it is particularly preferable to use a water-resistant adhesive as the adhesive that is fixed to one side of the flat base material 5 in order to maintain the wavy shape of the corrugated base material. This is because when using the attractant band in the mountains and forests, the fixed part becomes a bone and can maintain its shape even if it is exposed to rain or dew.

The method of fixing the corrugated base material to one side of the flat base material 5 can be carried out by reusing equipment for generally manufacturing corrugated board.

The insecticide to be applied or impregnated onto the light shielding layer on the corrugated substrate is selected from organophosphorus insecticides, pyrethroid insecticides, carbamate insecticides, neraistoxin insecticides, etc., depending on the target pest. However, in the case of cedar beetles, for example,
Fenitrothion (manufactured by Sumitomo Chemical Co., Ltd., Sumithion (trade name)), an organophosphorus insecticide, is suitable.

The coating amount of the insecticide in the light shielding layer on the corrugated substrate varies depending on the type of insecticide, but for example, in the case of fenitrothion, the amount of the insecticide applied is 5 to 30 g/m ² as an active ingredient.
Preferably it is 10-20g/ ^m2 .

Naturally, the size of the attractant band needs to be long enough to fully encircle the outer periphery of the tree trunk when wrapped, but its width must be determined so that the pests that have once infiltrated the gap between the attractant band and the tree trunk will migrate. The width is wide enough to completely kill the insect without escaping, and can be adjusted depending on the type of insecticide and the amount of application, but it is usually 8 to 30 cm, preferably 8 to 30 cm, considering workability such as wrapping. should be about 10 to 15 cm.

EXAMPLES The present invention will be explained in more detail with reference to examples, but the present invention is not limited to the following examples.

Example 1 After solidly printing black ink on one side of corrugated cardboard core base paper 115 g/m ² as a corrugated base material using flexographic printing, Sumithion sol (manufactured by Sumitomo Chemical Co., Ltd., Sumithion) with an active ingredient of 10 g/m ² was applied. It was coated with a Meyer bar coater so that it would look like this.

This base material was laminated to a waterproof liner of 220 g/m ² using starch containing a waterproofing agent as an adhesive, with the insecticide-coated side facing outward, and processed into a single-sided corrugated board. The gap formed by the waveform had a height H of about 4 mm and a width W of about 9 mm.

Cut the above bonded molded product into pieces of 20 cm wide and 100 cm long to make the repellent bands, and place them in 2 locations above and below, centered on a 20-year-old cedar tree with a diameter of about 15 cm at breast height, about 1.5 m above the ground, in a cedar forest where cedar beetles are infested. Wrap them around the tree trunk at intervals and secure with vinyl string. Twelve adult Japanese cedar beetles that had been captured in advance were released exactly in the middle of the two areas where the attracting bands were wrapped, and the effects were observed by tracking them.

Approximately 70% of the adult cedar beetles infiltrated the gap between the waveform of the lure band and the tree trunk within 1 minute, and 100% after 10 minutes. In the end, 11 fish were confirmed to have been caught and killed.

Example 2 After solid printing black ink on one side of 70 g/m ² of unbleached Kurupak paper with wet strength enhancer added as a corrugated base material by flexo printing, Sumithion sol was coated with Sumithion active ingredient 10 g/m ² using a Meyer bar coater. It was coated with

This base material was laminated to 81 g/m ² of unbleached kraft paper using starch to which a waterproofing agent had been added as an adhesive, with the insecticide-coated side of the corrugated base material facing outward, and processed into a single corrugated board. The gap due to the waveform is approximately 4 mm in height and approximately 9 mm in width.
It was warm in mm.

Cut the above bonded molded product into pieces of 10 cm wide and 100 cm long to make the repellent bands, and place them in 2 locations above and below a 20-year-old cedar tree with a diameter of about 15 cm at breast height, centered at about 1.5 m above the ground, in a cedar forest where Japanese cedar beetle is infested. Wrap them around the tree trunk at intervals and secure with vinyl string. We released 20 adult cedar beetles that had been captured in advance at the exact midpoint between these two locations, and tracked them to see how effective they were.

70% of adult beetle beetles die within 1 minute.
After 10 minutes, 100% of the insects had infiltrated the gap between the waveform between the lure band and the tree trunk. In the end, 20 fish were confirmed to have been caught and killed.

In addition, when we checked the shape of the attractant band and measured the change in the amount of the applied drug 70 days after wrapping the attractant band, we found that the shape sufficiently maintained the initial waveform shape and the amount of drug remained at 82%. Furthermore, it was confirmed that it is effective.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing the layer structure of an example of the attracting band according to the present invention, and FIG. 2 is an explanatory view showing a cross-sectional state of the attracting band according to the present invention wrapped around a tree trunk. Symbols in the figure, 1... Attracting band, 2... Corrugated base material, 3... Insecticide coating layer, 4... Adhesive, 5...
Flat base material, 6... light shielding layer, 7... tree trunk.

Claims (1)

[Claims for Utility Model Registration] 1. A band for attracting and killing harmful insects, comprising a corrugated base material having a light shielding layer coated with or impregnated with an insecticide and fixed to one side of another flat base material. 2. The attracting and killing band according to claim 1, wherein the harmful insect is a boring insect.