JP2001037395A - Deathwatch beetle-controlling method and controlling tool used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for controlling deathwatch beetles which enables tobacco beetles to effectively be controlled for a long term while considering safety as well by applying an insecticidal chemical against deathwatch beetles to a specific substrate and by placing the substrate at an acting or lurking place of the deathwatch beetles. SOLUTION: This method is to apply an insecticidal chemical against deathwatch beetles to a substrate having voids that deathwatch beetles can invade and stay in and to place the substrate at their acting or lurking place. The substrate having voids which deathwatch beetles can invade and stay in may be corrugated cardboard. This tool for controlling deathwatch beetles is composed of a substrate having voids that deathwatch beetles can invade and stay in, and the substrate can be applied with an insecticidal chemical against deathwatch beetles. The substrate having voids that deathwatch beetles can invade and stay in may be a corrugated board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling tobacco beetles, which is regarded as an important pest in food factories, and to a control tool used for the method. In addition, since the beetles that frequently cause pruritus in a house are tobacco beetles, they can be indirectly controlled by controlling the beetles according to the present invention.

[0002]

2. Description of the Related Art Tobacco beetles are widely distributed throughout the world and are known as pests with wide food habits. At present, tobacco beetles are positioned as important pests in food factories. In addition, the tobacco beetle is of interest because it is a host of the beetle beetle, which has been frequently causing pruritus in homes in recent years, along with the beetle beetle.

There are many known insecticidal agents for tobacco beetles. It is possible to directly spray these agents to control tobacco beetles. But,
Such direct spraying is difficult when the tobacco beetle is buried in food or machinery. In such a case, there is a residual treatment method in which an insecticide is treated in advance in a place where the tobacco beetle is active or a place where the tobacco beetle is buried, and a contact insecticidal effect is aimed at. However, in the residual treatment method, the insecticidal effect and the residual effect largely depend on the material of the place where the insecticide is to be treated. In addition, the treated surface will be contaminated with the insecticide, which can be a problem in safety and hygiene.

[0004]

As described above, there are various problems in the method of directly spraying a chemical and the residual treatment method, and thus it is difficult to effectively control tobacco beetles. An object of the present invention is to provide a control method that effectively eliminates such tobacco beetles over a long period of time and also takes safety into consideration.

[0005]

Means for Solving the Problems As a result of diligent studies to solve the above-mentioned problems, the present inventor has found that by utilizing the behavioral habit of infiltrating into dark places and gaps of tobacco beetles, the insecticidal power of drugs and The inventors have found a means for dramatically improving the residual effect, and have completed the present invention in consideration of safety.

That is, according to the present invention, an insecticidal agent is applied to a substrate having a cavity in which the bug can invade and settle, and the substrate is placed in an activity or a hiding place of the bug. This is a method of controlling weevil to control. In addition, the present invention is a tool for controlling a tapeworm, which comprises a substrate having a space into which the tapeworm can penetrate and fix, and to which a drug having an insecticidal property against the tapeworm is applied.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The base material used for the control tool of the present invention is infested with worms,
Any material may be used as long as it has a fixable void, but more preferably a material capable of maintaining the insecticidal power of the applied agent for a long period of time. Examples of such a substrate include corrugated cardboard, wood and plastic plates bonded together with an appropriate gap. Among these substrates, it is most preferable to use cardboard.

[0008] The size of the voids in the substrate is not limited as long as the worms can penetrate and fix them, but assuming that the voids are cylindrical, the diameter is preferably 2 to 15 mm, and 6 to 10 mm.
mm is more preferable, and its length is preferably 3 to 50 mm, and 5 to
20 mm is more preferred. For cardboard, JIS standard step height A
Such a gap can be made by cutting the corrugated cardboard with a width of 5 to 20 mm (hole direction).

The agent to be applied to the substrate may be any agent as long as it exhibits insecticidal properties against the insect beetle, but it does not show repellency and has excellent residual effect. Is preferred. Specific examples of the drug to be used include chlorpyrifosmethyl, fenitrothion, pyrimiphosmethyl, diazinon, fenthion and the like. The application amount of the drug is not particularly limited as long as it can exhibit insecticidal properties against the beetle and is equal to or less than the reference amount used for each drug. The drug may be applied to the entire surface of the substrate, but is desirably applied only to the voids. In addition to an insecticidal agent, an agent that attracts the insects, such as a sex pheromone agent and a food attractant, may be applied together. Alternatively, bait may be installed in the base material instead of the drug to attract the worms. The installation place of the control tool of the present invention,
Although not particularly limited, it is desirable to install so as to enclose a place where a beetle is active or a place where it hides.

[0010] It is preferable that an adhesive tape is provided on the pest control device of the present invention. Thereby, removal becomes possible and the safety of the pest control device can be enhanced. Although the control tool and control method of the present invention are mainly used for tobacco beetles, they can also be used for beetles other than tobacco beetles, for example, Jinsanshibushi.

[0011]

[Example 1] Influence of the size of cardboard on colonization of adult male and female of the tobacco beetle, A-stage with JIS standard height of 5 mm and B-stage with height of 3 mm
We examined the preference of tobacco beetle colonization using various types of cardboard. A and B cardboard boxes each 4
cm square, and cut these cardboards with a diameter of 13c.
m, 1 cm apart from the bottom of the center of a plastic container having a height of 7 cm and installed with a double-sided tape. 100 male and female adults were released there, and the number of colonies fixed on each cardboard 22 and 28 hours after release was observed. The experiment was performed under the conditions of 27 ° C., 16L8D, and 70% RH, and the number of fixings to each cardboard was investigated in four repetitions. The test insects were grown on a corn flour diet containing 5% dry yeast under the conditions of 27 ° C., 16L8D, and 70% RH. Male and female adults that appeared on the feed surface within 2 days were tested. did. Table 1 shows the number of fixings on the cardboards of the A-stage and the B-stage.

[0012]

[Table 1]

After 22 and 28 hours from release of the male and female adults, the fixation rate to both types of cardboard is 93.2 to 94.5.
% Was high. The fixing rate of various cardboards was 54.
8 to 56.8%, 37.8% to 38.5% in the B stage, and the fixing ratio of the A stage was about 1.5 times that of the B stage.

[Example 2] Change in the number of adult male and female adults of tobacco beetle on cardboard, 35 cm x 35 cm, 50 cm in height, 3 sides
A cage made of fine mesh on the top and bottom (made of acrylic material)
Experimented within. A corrugated cardboard having a corrugated cardboard with a height of 5 mm is cut into a width of 2 cm so that a large number of holes are formed in the cross section of the long side of the corrugated cardboard. Was installed with double-sided tape. The number of colonies fixed on the cardboard was observed over time after 1, 3, 5, 14, 24, and 98 hours after releasing 200 male and female adult tobacco beetles. The experiment was performed under the conditions of 27 ° C., 16L8D, and 70% RH, and the number of fixation to the cardboard was investigated in three repetitions. The test insects were the same as those in Example 1. Table 2 shows the transition of the number of fixings to cardboard.

[0015]

[Table 2]

In the cardboard installation area, one hour after release, 9
0.2% of male and female adults settled on the cardboard. Furthermore, the number of colonies increased with the passage of time, and 96.4% of adults settled on the cardboard 98 hours after release. On the other hand, in the cage without cardboard, about half of the adults folded their antennae at 14 and 24 hours after release and stood still with their heads bent under their chests. Tended to settle at the top of the But,
The other half of the adults did not colonize and moved around in the cage. FIG. 1 shows an example of the status of colonization of tobacco beetles in cages 24 hours after releasing male and female adults (200 animals).

[Example 3] Influence of the installation position and width of corrugated cardboard on the fixation of adult male and female tobacco beetles to corrugated cardboard.
A cage made of fine mesh on the top and bottom (made of acrylic material)
Experimented within. Cut A corrugated cardboard with a height of 5 mm into 0.5, 1 and 2 cm widths so that a number of holes are formed in the cross section of the long side of the corrugated cardboard. As shown in FIG. An installation zone was set on the cage floor for comparison of installation locations. That is, the corrugated cardboard of the A-stage with a corrugated height of 5 mm was cut into a width of 2 cm, and the corrugated cardboards of the respective widths were surrounded at the center of the floor of the cage so as to form a square having a side of 25 cm. In addition, fixing to the floor surface was performed with double-sided tape so that the hole of the cardboard was in the horizontal direction. The number of colonies on cardboard was released by releasing 200 male and female adult tobacco beetles,
Observations were made over time after 1, 5, 24, and 48 hours. The experiment was performed under the conditions of 27 ° C., 16L8D, and 70% RH, and the number of fixation to the cardboard was investigated in three repetitions. The test insects were the same as those in Example 1. Table 3 shows the number of fixings to each cardboard.

[0018]

[Table 3]

In the method of installing the cardboard on the uppermost side surface of the cage, the width of the cardboard does not greatly affect the fixation of the tobacco beetle, and 53.7% to 59.2% one hour after release.
Of male and female adults colonized the cardboard. Furthermore, the number of colonies increased with the passage of time, and was 77.0 at 48 hours after release.
８80.5% of male and female adults settled on the cardboard. on the other hand,
In the cage in which the cardboard was placed on the floor, 93.4% of the male and female adults settled on the cardboard one hour after release. Furthermore, the number of colonies slightly increased over time, and 95.7% of male and female adults colonized the cardboard 48 hours after release.

With the method of placing the cardboard on the top side of the cage, the width of the cardboard did not affect the settling of the tobacco beetle. On the other hand, comparing the fixability of the method of installing the cardboard on the top side surface or the floor of the cage, the fixability was significantly higher when the cardboard was installed on the floor.

Example 4 Influence of Cardboard Width on Settability of Male and Female Adults of Tobacco Beetle on Cardboard Placed on Cage Floor Surface 35 cm × 35 cm, height 50 cm, side surface 3
A cage made of fine mesh on the top and bottom (made of acrylic material)
Experimented within. A corrugated cardboard having a corrugation height of 5 mm was cut into 0.5, 1 and 2 cm widths in the same manner as in Experiment 3, and the corrugated cardboards of the respective widths were surrounded at the center of the floor of the cage so as to form a square having a side of 25 cm. . The floor was fixed with a double-sided tape so that the hole of the cardboard was in the horizontal direction. The number of colonies fixed on cardboard was observed over time after 1, 3, 5, 24, 48, and 72 hours after releasing 200 male and female adults of the tobacco beetle. The experiment was performed at 27 ° C, 16L8D, 70
% RH, and the number of fixings on cardboard was 3
Performed in repetitions. The test insects were the same as those in Example 1. Table 4 shows the transition of the number of fixings to each cardboard.

[0022]

[Table 4]

The width of the corrugated cardboard did not significantly affect the fixation of the tobacco beetle. One hour after release, most of the male and female adults of 88.7 to 94.0% settled on the cardboard. Furthermore, the number of colonies slightly increased with the passage of time, and the number of colonies slightly increased or decreased according to the elapsed time after release. However, in 24 hours, 95.4 to 97.0% of male and female adults settled on the cardboard. .

Example 5 Insecticidal Activity of Cardboard and Cardboard Treated with Chlorpyrifosmethyl Emulsion against Male and Female Adults of Tobacco Beetle Reagent: Chlorpyrifosmethyl, a commercially available Lerdan Emulsion 25, was used. Test concentration: 250 mg / active ingredient in standard amount treatment
m ² , 125 mg / m of active ingredient in 1/2 standard dose treatment
^{And 2} .

Processing sections: There were four sections: 1/2 standard volume processed cardboard, standard volume processed cardboard, 1/2 standard volume processed cardboard, and standard volume processed cardboard. Corrugated cardboard was cut from the A-stage to a width of 2 cm in the same manner as in Example 3, and cardboard was obtained by taking out the corrugated middle plate of the corrugated cardboard and stretching it flat 2c.
The test piece was cut out to a width of m. The drug was adjusted to a predetermined concentration with acetone and processed. In the case of corrugated cardboard, the processing amount was calculated based on the surface area of the outer plate, and the pipette was injected into the corrugated middle plate of the corrugated cardboard so as to provide uniform processing. After the acetone was evaporated, the corrugated cardboard and the cardboard in each treatment section were placed on the top of the side of the cage with double-sided tape as in Experiment 2.

Assay of residual efficacy by insecticidal activity: The residual efficacy assay of insecticidal activity in each section was carried out immediately after the chemical treatment, on days 30, 45 and 60. The assay was performed in a breeding room at 27 ° C., 16L8D, and 70% RH, and survival was determined 4 days after release in the cage. In the judgment of life or death, those who could walk were made living, and those who could not walk and struggled were judged to be dead. After completion of the test, the cage was stored in a dark room, 70% RH breeding room at 27 ° C. until the next experiment. The test insects were the same as those in Example 1. Table 5 shows the mortality in each treatment group.

[0027]

[Table 5]

Immediately after the treatment, all the plots showed 100% mortality. The mortality rate of each plot decreased with the lapse of time after the treatment. The mortality rate on the 60th day after the treatment was 99.3% for the standard-treated corrugated paper, which was the highest. Next was 標準 standard volume treated cardboard with a mortality of 86.4%. The mortality rates of the standard dose treated cardboard and the 1/2 standard dose treated cardboard were as low as 62.8% and 38.5%. The 標準 standard volume treated cardboard had higher insecticidal activity than the standard volume treated cardboard.

[0029]

According to the present invention, it is possible to improve the insecticidal activity and residual efficacy of a drug against a beetle by a simple and inexpensive method. In addition, it is a highly safe method that can be applied to many places and ensures stable insecticidal activity and residual effect.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of a case showing a change in the status of colonization 24 hours after release of male and female adult tobacco beetles.

Claims (5)

[Claims] 1. A substrate having a space in which a worm can enter and settle is coated with an agent exhibiting insecticidal properties against the worm, and the base material is placed in an activity or a hiding place of the worm.
A method for controlling mosquitoes that controls mosses. 2. The method according to claim 1, wherein the base material having a space in which the worm can enter and fix is a corrugated cardboard. 3. A tool for controlling a tapeworm, which comprises a substrate having a space through which the tapeworm can penetrate and fix, and a chemical having insecticidal properties against the tapeworm is applied to the substrate. 4. The tool according to claim 3, wherein the base material having a space in which the worm can enter and fix is a corrugated cardboard. 5. The tool according to claim 3, wherein an adhesive tape is provided on the base material.