JP3259851B2 - Pest control method and pest control material - Google Patents

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 pests having a respiratory tract and a pest control material used in the method.

[0002]

[Prior Art] Termites, claw mites, etc.
When exterminating pests with stomachs, it is common to use chemical pesticides, whether or not the pests have stomachs. Chemical insecticides with strong acute toxicity, such as drug series and pyrethroid drugs, are widely used.

[0003]

By the way, this kind of chemical insecticide is to control pests by the medicinal effect of its chemical component, but the chemical component often has an adverse effect on humans and animals, Environmental pollution due to the application of highly toxic chemicals is also a concern.

[0004] Further, with the use of chemical insecticides, the insect pests gradually have insecticide resistance (resistance), and the chemical insecticide which was initially effective eventually stops exerting its effect as an insecticide. Things happen.

[0005] The present invention has been made based on such a background, there is little risk of adverse effects on humans and animals other than the pests and environmental pollution, and the pests do not have the resistance associated with use.
An object of the present invention is to provide a pest control method and a pest control material that can reliably control pests having a respiratory tract over a long period of time.

[0006]

In order to achieve this object, the invention according to claim 1 is directed to an airway formed on a body surface of a pest having an airway and extending from the airway into the body of the pest. A pest control method, characterized in that a powdery solid substance is attached to a tracheal system having a trachea to prevent the pest from taking in oxygen from the respiratory tract.

[0007]

According to the first aspect of the present invention, since powdery solids adhere to the tracheal system of the pest having the respiratory tract to prevent the uptake of oxygen, the pest is killed and killed by lack of oxygen.

[0008] This insect-controlling action is performed by the physical properties of a powdery solid substance, and is different from chemical insecticide. Therefore, it is necessary to use a chemical substance having acute acute toxicity as in the past. There is no.

Therefore, there is no risk of adverse effects on humans and livestock due to pest control and environmental pollution.

In addition, since the insect is not a chemical insecticide, the insect does not gradually have resistance, and the insect having the respiratory tract can be reliably exterminated for a long period of time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described by way of embodiments with reference to the drawings.

In the following, first, the pest control mechanism basically expected in the present application will be described with reference to the schematic diagram shown in FIG. 1, and then the pest control method and the pest control material of the embodiment will be described.

First, the pest control mechanism basically expected in the present application is as follows.

In FIG. 1, 1 is a pest having a respiratory tract, 2 is a body surface of the pest, and 3 is a hair of the pest.

In the pest 1 having an esophagus, a trachea 4 extending from the body of the pest 1 opens to the body surface 2 and the esophagus 5
The trachea 4 and the respiratory tract 5 constitute the tracheal system 6 of the pest 1 and have a function as a passage for introducing oxygen taken into the body by the pest 1 into the body. .

In the pest 1 having such an esophagus 5, the interval between the body hairs 3 near the esophagus 5 is P, and the opening size (diameter) of the esophagus 5 is W.

In FIG. 1, 71, 72, 7
Pest control materials 3 and 74 are each composed of a powdery solid material, and these pest control materials 71, 72, 73 and 74 actually have various shapes in reality. For the sake of simplicity, they are shown as spheres in the drawings, and each has only a different particle size.

In the vicinity of the respiratory tract 5 of the pest 1, the behavior of the pest control materials 71, 72, 73, 74 differs depending on the particle size. In the following description, the pest control materials 71, 7 will be described.
2, 73 function as an active ingredient, and the pest control material 74 is positioned as a comparative example.

That is, the pesticidal material 71 has a particle diameter D _1.
Are smaller than the interval P of the body hair 3 and larger than the opening W of the esophagus 5.

Therefore, the insect-controlling material 71 reaches the body surface 2 of the insect pest 1 through the space between the body hairs 3 and can be located on the surface side of the respiratory tract 5. Then, the insect-controlling material 71 that has reached the body surface 2 of the insect pest 1 adheres to the body surface 2 due to lipids, moisture, and the like on the body surface 2, and the spiracle 5 is covered with the insect-controlling material 71. The obstruction is obstructed, and the uptake of oxygen from the respiratory tract 5 is inhibited.

The insect-controlling material 72 has a particle diameter D ₂ of 3
Are slightly smaller than the interval dimension P and the opening dimension W of the esophagus 5.

Therefore, the pest control material 72 reaches the body surface 2 of the pest 1 in the same manner as the pest control material 71, but can further enter the trachea 4 from the esophagus 5.

When the pest control material 72 enters the trachea 4,
Since the ventilation area of the trachea 4 is greatly reduced, the uptake of oxygen by the pest 1 is impaired, and the pest control material 72 that has entered does not easily fall off the trachea 4. Will surely die.

In the pest control material 73 having a smaller particle size than the pest control material 72, the hair 3 hardly hinders the pest control material 73 from reaching the body surface 2 of the pest 1. In addition, the phylum 5 is also a pest control material 7
Since the size is much larger than 3, the pest control material 73 can enter the trachea 4 with a relatively high probability.

The pesticidal material 73 that has entered the trachea 4 in this way is difficult to close the trachea 4 with the single particles as with the pesticidal material 72, but is relatively high as described above. Since the insects enter the trachea 4 with a certain probability, a plurality of insect-controlling materials 73 adhere and accumulate, so that the ventilation cross-sectional area of the trachea 4 is reduced, and the insect pest 1 is in an oxygen-deficient state.

The insect-controlling material 74 is a comparative example in the case of the insect pest 1 and has a particle diameter D ₄ larger than the interval P of the body hair 3.

In such a case, the pest control material 74 is
5 cannot reach the body surface 2 of the pest 1
Function cannot be expected. But,
The spacing dimension P of the body hair 3 and the opening dimension W of the esophagus 5 are:
Since different values are taken depending on the kind of the pest, depending on the kind of the pest, the pest control material 74 may be used as the above-described pest control material 71-71.
It can act as the equivalent to 73.

As described above, in the case described above, the pest control materials 71, 72 and 73 adhere to the tracheal system 6 of the pest 1 and hinder the uptake of oxygen from the respiratory tract 5 of the pest 1.
Pest 1 dies due to lack of oxygen and achieves the purpose of pest control.

An advantage of such a pest control mechanism is that, unlike the conventional chemical pesticides, the pests can be controlled without evaporating highly acutely toxic chemicals in a high concentration in the space where the pests are to be controlled. This avoids the effects of chemical pesticides on humans and the environment and environmental pollution, and the pests do not gradually become resistant and are carried out by the physical properties of powdery solids for a long time. It is possible to reliably control pests having a respiratory tract.

Next, a demonstration test of the pest control mechanism will be described.

In this demonstration test, a paper was spread on a petri dish,
The insect pest-controlling material is evenly spread on the paper, and 10 pests are put in the petri dish in this state, and the activity of the pests is observed over time.

In the demonstration test described below, a house termite, a termite, is used as a pest. In this case, the interval P between the body hairs is approximately 63 μm, and the opening W of the respiratory tract is approximately 30 μm.

As the pest control material, natural zeolite which is a powdery solid is used, and the particle size distribution of the pest control material is shown in FIG.

The natural zeolite is trade name “Zeofil (CP)” manufactured by Shin-Tohoku Chemical Co., Ltd. Like one.

[0035] As apparent from FIG. 2, in this pest control material, those equivalent to the pest control materials 71, 72, and 73 as active ingredients against the termites of the termites are approximately over 40% by weight%, and The material that functions as the pesticide 71 is approximately 12%, and the material that can function as the pest control materials 72 and 73 is approximately 28%.

The petri dish used in this demonstration test was:
It is 9 cm in diameter and 0.64 g (100 g / m
⁽ Corresponding to the state where the insect-controlling material was sprayed at a ratio of ² )).

The observation results are as follows.

From the injection of the termite into the petri dish
After one hour, the ten termites were moving around in the petri dish, although the pesticide powder was attached to the body surface.

Two hours after the termites were introduced, four of the termites had died, and the activity of the remaining six termites decreased to such an extent that the antennas and legs were occasionally moved while still standing at each point in the petri dish. I was

After three hours have passed since the termites were introduced, the remaining 6
The animals died, and all ten termites in the petri dish were confirmed dead.

After that, when the termites that had died in this way were observed with a microscope, the powdered pest-controlling material had adhered to the body surface of the termites including the respiratory tract.

Among the above observation results, in particular, the fact that the termites died two hours after the injection of the termites, and the pest control including the esophagus on the body surface of the dead termites Considering that the wood had adhered, it was presumed that these termites were inhibited from taking up oxygen from the tracheal system and died in a so-called oxygen-deficient state, demonstrating the pest control mechanism. It is considered something.

As described above, against the termites as pests, the pest control mechanism demonstrated by the powdered natural zeolite as a pest control material is, as described above, the size of the pests and the like, the pest control material and the like. Since it is physically established in relation to the particle size of the powdery solid material, it can be applied in the following range.

That is, this pest control mechanism is based on the premise that the pest has a respiratory tract, and the pest control method of the present invention can be carried out as long as the pest has the respiratory tract.

Examples of pests that can be subjected to the method of controlling pests of the present invention include, for example, other termites and house mites, such as claw mites and cockroaches,
Mosquitoes, flies, fleas, lice, platypus beetles,
Shiban beetles, Sword beetles, Saw-throat beetles, Scrophularus serrata, Scarab beetles, Adzuki beetles, Scarab beetles, Scarabae beetles, Iga, Chironomidae, Drosophila, Stinkbugs, Aphids,
Ticks, sand flies, cuticles, planthoppers, leafhoppers, scutellaria, beetles, beetles, beetles, scale insects, spider mites, aphids, stag beetles, cutworms, beetles, pine beetles, bark beetles, and beetles Shibattoga.

As described above, when a pest different from the termites is targeted, as is clear from the pest control mechanism described above, the distance P between the hairs of the targeted pests is determined.
The particle size of the active ingredient of the pest control material is determined according to the opening size W of the respiratory tract, and it is preferable to appropriately adjust the particle size distribution of the pest control material used. In the case of the pest-controlling material described above, it is efficient to use only those having a particle size smaller than the interval P between the body hairs of the pest as the pest-controlling material.

For example, when a house mite, the claw mite, is used as a pest to be controlled, the spacing between the hairs is approximately 30 μm, and the opening size of the esophagus is approximately 1 μm.

Therefore, when using the insect-controlling material used for the termites (having the particle size distribution shown in FIG. 2) for the termites, about 28% by weight can reach the body surface of the termites. However, since almost no fine particles having a particle diameter of 1 μm or less are contained, the pest control material 7
It is hardly expected that the tracheal system will be blocked by invasion into the trachea as in 2,73, and as a result, the pest-control effect on the mites will be somewhat reduced.

On the other hand, as shown in FIG. 3, when the particle size distribution of the insect-controlling material is made finer, the weight-%
64% of them can reach the body surface of the mites,
Since the fine particles having a particle size of 1 μm or less are contained in only about 3% by weight, the tracheal system can be blocked by invading into the trachea like the pest control materials 72 and 73. A better pest control effect can be expected than the pest control material of No. 2.

It should be noted that even in the case of the pest-controlling material having an increased content of fine particles, the pest-controlling materials 72 and 73 have the same effect on the pest-controlling mechanism for pests such as termites having a larger hair spacing than ticks. Since it means that it increases, a good pest control effect can be obtained.

In this pest control mechanism, since no chemical action is expected of the pest control material and the physical properties as a solid are used as described above, various powdery solids are used. However, as described above, the particle size of the powdery solid is a very important factor.

Therefore, it is important to obtain a powdery solid having a particle size on the order as described above as a pest-controlling material for industrial mass production.

From these viewpoints, a solid material preferable as a pesticidal material is an artificial zeolite, a silicic anhydride, which has hygroscopicity or humidity control property like the above-mentioned natural zeolite.
Examples thereof include substances such as silica gel, clay minerals such as clay, bentonite, talc, and sepiolite, substances composed of siliceous sedimentary rocks such as diatomaceous earth, volcanic ash deposits such as shirasu, calcium carbonate, and fly ash.

Hereinafter, a demonstration test in which a representative example of the solid material is performed as a pest control material will be described. This verification test is performed in accordance with the verification test using the natural zeolite, and only the pest control material is applied to the solid material. It has been changed.

First, the case where clay is used as a pest control material will be described. The clay is “OS clay” (trade name) manufactured by Maruo Calcium Co., Ltd., and its particle size is 44 μm.
m and the particle size distribution is extremely fine as a whole as shown in FIG.

Therefore, the pest control material 71, as an active ingredient against the termites termites,
Those corresponding to 72, 73 are 100% by weight%, and those that can function as the insect-controlling materials 72, 73 are generally 95%.
%, And the material that functions as the insect-controlling material 71 is approximately 5%.

Observation results of a verification test performed using such a clay as a pest control material are as follows.

After one hour from the introduction of termites into a petri dish in which clay as a pest control material has been placed,
Two of the ten termites that had been killed had died, and the remaining eight had fluttered antennas and legs.

Two hours after the termite injection, seven termites had already died, and the remaining three termites only slightly moved their antennae.

After 3 hours have passed since the termites were introduced, the remaining 3
The animals died, and all ten termites in the petri dish were confirmed dead.

After that, when the termites that died in this way were observed with a microscope, it was found that the powdery pest-controlling material had adhered to the body surface of the termites including the esophagus. It was similar.

Next, the case where bentonite is used as a pest-controlling material will be described. The bentonite is “Hodaka Inyojun Bentonite” (trade name) manufactured by Toyonjun Yoko Co., Ltd., and its particle size is approximately 40 μm or less. The particle size distribution is extremely fine as a whole as shown in FIG.

Therefore, in this bentonite, 100% by weight of the pest control materials 71, 72, 73 as an active ingredient against the house termites of the termites is 100%, and most of them are used as the pest control materials 72, 73. There are few that can function as the pest control material 71.

The observation results of the verification test performed using such bentonite as a pest control material are as follows.

One hour after the introduction of termites into a petri dish in which bentonite was disposed as a pest-controlling material, all of the 10 termites that were placed were alive with the pest-controlling material attached to the body. Nine fluttered legs, the other one was moving around.

Two hours after the termite introduction, three termites had already died, and the remaining six termites moved their antennae and legs, and one was moving around.

After 3 hours from the termite introduction, the remaining 7
The animals died, and all ten termites in the petri dish were confirmed dead.

Thereafter, when the termites that died in this way were observed with a microscope, it was found that the powdered pest-controlling material had adhered to the body surface of the termites including the esophagus. It was similar.

Next, the case where sepiolite is used as a pest control material will be described. This sepiolite is "Miraclay P-80V" (trade name) manufactured by Omi Mining Co., Ltd.
The particle size distribution is as shown in FIG.

Therefore, in this sepiolite, the equivalent to the insect-controlling materials 71, 72, 73 as an effective ingredient against the termites of the termites is less than 50% by weight, and functions as the insect-controlling materials 72, 73. What can be done is about 45%, and what can function as the pest control material 71 is less than 5%.

The observation results of the verification test performed using such sepiolite as a pest control material are as follows.

After 1 hour from the introduction of termites into a petri dish in which sepiolite as a pesticidal material was placed, all of the ten termites that had been introduced were alive with the pesticide attached to the body. Of these, five were moving around, and the other five had their antennas and legs twitching.

Two hours after the introduction of the termites, the death of all ten termites was confirmed.

When the termites that had died in this way were observed with a microscope, it was found that the powdered pest-controlling material had adhered to the body surface of the termites including the esophagus as described above. Was.

Next, a case where talc is used as a pest control material will be described. The talc is “3S talc” (trade name) manufactured by Maruo Calcium Co., Ltd.
The particle size distribution is extremely fine as a whole as shown in FIG.

For this reason, the pest control material 71,
Those corresponding to 72 and 73 are 100% by weight, and most of them can function as the pest control materials 72 and 73, and there is almost no function as the pest control material 71.

The observation results of the verification test performed using such talc as a pest control material are as follows.

One hour after the injection of termites into a petri dish in which talc was disposed as a pest control material,
Five of the ten termites that have been killed,
The remaining five animals had pesticides attached to their bodies and flapping their antennae and legs.

Two hours after the termite injection, six termites have died, and the remaining four termites have antennae,
He only moved his legs slightly.

After 3 hours have passed since the termites were introduced, the remaining 4
The animals died, and all ten termites in the petri dish were confirmed dead.

When the termites that died in this way were observed with a microscope, it was found that the powdered pest-controlling material had adhered to the body surface of the termites including the esophagus as described above. Was.

From the above experimental results on clay, bentonite, sepiolite and talc, it can be inferred that clay minerals can generally be used as pest control materials.

Next, a case where diatomaceous earth is used as a pest control material will be described. The diatomaceous earth is “Radiolite (fired product)” (trade name) manufactured by Showa Chemical Industry Co., Ltd. As shown in FIG.

For this reason, the diatomaceous earth is used as the active ingredient against the termites termites,
What corresponds to 72, 73 is about 80% by weight%,
Those that can function as the pest control materials 72 and 73 are generally
45%, approximately 35% function as the pest control material 71
It is.

The observation results of the verification test conducted using such diatomaceous earth as a pest control material are as follows.

One hour after the termites were put into a petri dish in which diatomaceous earth was disposed as a pest control material,
Eight of the ten termites were moving around with diatomaceous earth as a pest-controlling material attached to the body surface, and the remaining two had fluttering legs.

Two hours after the termites were introduced, all ten termites fluttered in their antennae and legs, and were alive in a weakened state as a whole.

Three hours after the termite injection, two animals died, seven of them were weak enough to move their antennas and legs occasionally, and the other one fluttered their antennas and legs. I was

Four hours after the injection of termites, eight animals died, and the remaining two animals weakened their legs while fluttering.

At this time, since it was confirmed that diatomaceous earth had a pest control effect, the subsequent tests were terminated.

Microscopic observation of dead termites confirmed that the powdered insect-controlling material had adhered to the body surface of the termites including the esophagus.

Next, a case where shirasu is used as a pest-controlling material will be described. The shirasu is “Winlite S-20” (trade name) manufactured by Ichi Kasei Co., Ltd., and its particle size distribution is shown in FIG. It is shown.

Therefore, the insect-controlling material 71, as an active ingredient against the house termites of the termite,
Those corresponding to 72, 73 are less than 70% by weight in weight, those capable of functioning as the pest control materials 72, 73 are approximately more than 25%, and those functioning as the pest control material 71 are approximately 45%. is there.

The observation results of the verification test performed using such shirasu as a pest control material are as follows.

One hour after the termites were put into a petri dish in which whitewash as a pest control material was placed,
Nine of the ten termites were moving around, with the shirasu as a pest control agent attached to the body surface, and the other one fluttered its legs.

Two hours after the termites were injected, 5 animals died, and the remaining 5 animals also had jerks in their legs.

Three hours after termite injection, nine animals died, and the other one was weak enough to occasionally move its antennae.

At this time, since it was confirmed that Shirasu had a pest control effect, the subsequent tests were terminated.

Microscopic observation of dead termites confirmed that the powdered insect-controlling material had adhered to the body surface of the termites including the esophagus.

Next, the case where calcium carbonate is used as a pest-controlling material will be described. The calcium carbonate is “Special Rice (S)” (trade name) manufactured by Maruo Calcium Co., Ltd., and the particle size is 50 μm. The particle size distribution is as shown in FIG.

Therefore, the calcium carbonate equivalent to the pest control materials 71, 72, 73 as an active ingredient against the termites termites is approximately 100% by weight.
About 95% can function as the pest control materials 72 and 73, and about 5% can function as the pest control material 71.

The observation results of the verification test performed using such calcium carbonate as a pest control material are as follows.

After 1 hour from the introduction of termites into a petri dish in which calcium carbonate as a pest-controlling material was placed, the 10 termites that had been applied had calcium carbonate as a pest-controlling material adhered to the body surface. , I was moving around while laughing.

Two hours after termite injection, nine animals died, and the other one only moved the antenna and legs.

After 3 hours have passed since the termites were introduced, the remaining 1
The animals died, and all termites killed.

Microscopic observation of the dead termites revealed that the powdered insect-controlling material had adhered to the body surface of the termites including the esophagus.

Next, a case where fly ash is used as a pest-controlling material will be described. The fly ash is “ONODA Super Flow” (trade name) manufactured by Onoda Cement Co., Ltd., and its particle size distribution is shown in FIG. It is shown.

Therefore, in this fly ash, the equivalent of the insect-controlling materials 71, 72, 73 as an active ingredient against the termites of the termites is approximately 100% by weight.
The whole amount can function as the pest control materials 72 and 73, and there is almost no function as the pest control material 71.

The observation results of a verification test conducted using such fly ash as a pest control material are as follows.

After 1 hour from the introduction of termites into a petri dish in which fly ash as a pest-controlling material has been placed, the 10 termites that have been input remain intact with fly ash as a pest-controlling material on the body surface All ten were moving around.

[0111] Two hours after the termite injection, all 10 survived, but 7 of them were flapping their antennae and legs, and only the remaining 3 were moving around.

Three hours after termite injection, three animals died, and the remaining seven animals were weak enough to occasionally move the antenna.

After 4 hours from the termite introduction, the remaining 7
The animals died, and all the termites were confirmed dead.

Microscopic observation of dead termites confirmed that the powdered pest-controlling material had adhered to the body surface of the termites including the esophagus.

As is evident from the above demonstration tests, regardless of the chemical composition, any of such solids can exhibit a pest control effect. It is due to the pest control mechanism.

Therefore, even in the case of an appropriate mixture of the above-mentioned solid substances, a powdery solid substance which satisfies the particle size condition of the above-mentioned pest control mechanism becomes an active ingredient similarly, and as in the case of the above-mentioned natural zeolite, it becomes an active ingredient. You can use it to get rid of this.

When the substance of the pest control material used in the pest control mechanism described above has a hygroscopic property or a humidity control property, such as the natural zeolite, artificial zeolite or silica gel, the esophagus and trachea of the pest are controlled. The pest-controlling material attached to the pest is easy to suck out moisture in the body of the pest through the tracheal system of the pest itself, so that there is an advantage that the pest is dehydrated and its death is promoted.

Further, to the pest control material made of the powdery solid as described above, for example, a weak medicinal agent such as boric acid may be added. In this case, the above-mentioned pest control mechanism simultaneously acts on the pest together with the medicinal effect of the drug, so that even if the medicinal effect is weaker than before, it is sufficiently effective.

[0119]

As described above, according to the first aspect of the present invention, since pulverulent solids adhere to the tracheal system of the pest having the respiratory tract and prevent the uptake of oxygen, the pest is oxygen-deficient. Is killed and exterminated.

This insect-control action is carried out by the physical properties of a powdered solid substance, and is different from chemical insecticide. Therefore, it is necessary to use a chemical substance having a strong acute toxicity as in the past. There is no.

Therefore, there is no risk of adverse effects on humans and livestock due to pest control and environmental pollution.

In addition, since it is not a chemical insecticide, the pest does not gradually have resistance, and the pest having the respiratory tract can be reliably exterminated for a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view for explaining a pest control mechanism.

FIG. 2 is a particle size distribution diagram of a pest control material made of natural zeolite.

FIG. 3 is a particle size distribution diagram of a pest control material composed of fine-grained natural zeolite.

FIG. 4 is a particle size distribution diagram of a pest control material made of clay.

FIG. 5 is a particle size distribution diagram of a pest control material composed of bentonite.

FIG. 6 is a particle size distribution diagram of a pest control material composed of sepiolite.

FIG. 7 is a particle size distribution diagram of a pest control material made of talc.

FIG. 8 is a particle size distribution diagram of a pest control material made of diatomaceous earth.

FIG. 9 is a particle size distribution diagram of a pest-controlling material composed of shirasu.

FIG. 10 is a particle size distribution chart of a pest control material composed of calcium carbonate.

FIG. 11 is a particle size distribution diagram of a pest control material composed of fly ash.

[Explanation of symbols]

 P Interval between body hairs W Dimension of opening of stomach 1 Pest 2 Body surface 3 Body hair 4 Trachea 5 Stomach 6 Trachea 71,72,73 Pest control material (solid)

Continuation of the front page (56) References JP-A-63-250308 (JP, A) JP-A-1-261217 (JP, A) JP-A-2-169506 (JP, A) JP-A-52-54031 (JP, A) JP-A-6-80508 (JP, A) JP-A-5-201818 (JP, A) JP-A-6-80509 (JP, A) JP-A-6-80511 (JP, A) JP-A-6-80510 (JP, A) JP-A-6-80513 (JP, A) JP-A-6-80512 (JP, A) JP-A-5-58828 (JP, A) JP-A-5-255980 (JP, A A) JP-A-5-255981 (JP, A) JP-A-6-9322 (JP, A) JP-A-6-23711 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) A01N 25/12 A01N 59/06 A01N 61/00

Claims (12)

(57) [Claims] 1. A tracheal system having a respiratory tract formed on the body surface of a pest having a respiratory tract and a trachea extending from the respiratory tract into the body of the pest, particles having a size smaller than a distance between hairs of the pest.
A method for controlling pests, comprising attaching a powdered solid having a diameter to prevent oxygen from being taken in from the respiratory tract of the pest. 2. The method for controlling pests according to claim 1,
A method of controlling pests, characterized in that the powdery solid material has a particle size larger than the opening size of the pest gate, and the solid substance is attached to the surface of the pest gate. 3. The method for controlling pests according to claim 1, wherein
The particle size of the powder-like solid, Furthermore, smaller than the opening dimension of the spiracles of the pest, pest control method characterized by depositing the solid was entering the trachea from spiracles. 4. An active ingredient which is a powdery solid adhered to the tracheal system of a pest having a respiratory tract and which has a particle size smaller than the distance between the hairs of the pest (excluding zeolite). Pest control materials. 5. The pest control material according to claim 4, wherein the particle size of the solid is further set to be larger than the opening size of the esophagus of the pest. 6. The pest control material according to claim 4, wherein the particle size of the solid substance is further set smaller than the opening size of the esophagus of the pest. 7. The pest control material according to claim 4, wherein the solid substance is formed of a substance having a hygroscopic property. 8. The insect-controlling material according to claim 4, wherein the solid material is formed of a clay mineral. 9. The pest-controlling material according to claim 4, wherein the solid is formed of siliceous sedimentary rock. 10. The pest control material according to claim 4, wherein the solid is formed of a volcanic ash deposit. 11. The pest control material according to claim 4, wherein the solid is formed of calcium carbonate. 12. The pest-control material according to claim 4, wherein the solid material is formed of fly ash.