JP2006254765A - Method for exterminating termite - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for efficiently exterminating termites in which uptake efficiency of an active ingredient of an exterminator is improved by activating action in which termites led into an exterminating apparatus eat the exterminator and a treating time required until whole termite group (nesting group) is killed and extermination of termites is completed is shortened as much as possible and the extermination can be carried out in a short period, preferably of <3 months. <P>SOLUTION: In the method for exterminating termites, powder 1 or tablets 2 containing a boiled material (having 100-10 mesh particle diameter) composed of powdered and boiled wood containing an active ingredient for extermination and a cellulose-based vehicle are prepared. On the other hand, the bottom plate 5 of an openable container 3 is provided so as to enable water flow and the bottom plate 5 is installed in a sand layer 8 and many tablets 2 are stored in the container 3 and the powder 1 in a prescribed amount is sprinkled onto the tablets 2 and water in an amount not causing outflow of water is added to at least powder 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a termite extermination method that attracts and exterminates termites.

  Various termite control agents have been developed for the control of termites that damage wooden structures and the like to reduce their strength and durability and to prevent the damage.

  The extermination method using a poison bait containing an insecticidal active ingredient against a natural or synthetic material that termites prefer to eat will not spread the insecticidal ingredient more than necessary in the human living environment or natural environment. It is advantageous compared to the spraying of insecticides in that it can be controlled.

  According to the extermination method using the termite-controlling bait, termites eat or eat the poison bait, and the insecticidal active ingredient is taken into the body and brought back to the nest, resulting in death. It is also possible to propagate the insecticidal active ingredient to other individuals by behavior such as grooming at the time of homing, and thus the entire group of termites (nest) can be destroyed.

  By the way, when attracting and exterminating termites, it has been devised how the termites can be guided into a device installed with a repellent without repelling them.

  For example, when a termite introduction port is formed in the extermination device, a termite extermination device is known in which an introduction auxiliary feed material is inserted into the termite introduction port. As an introduction auxiliary bait, termite can be efficiently introduced into the container from the introduction port when the corrugated cardboard is moistened.

  Incidentally, examples of formulations for insecticide baits include powders (powdered powders), granules, block-shaped molded products, etc., and the added excipients and extender components are white carbon, diatomaceous earth, kaolin, Examples include talc, clay, crystalline cellulose, calcium carbonate, bentonite, zeolite, sepiolite, and attapulgite (Patent Document 1).

  In addition, there is a known extermination method using a poisonous bait containing a woody granular material and granulated and adjusted to a particle size of 2 mm or more so as to enhance termite eating property (Patent Document 2).

  Thus, the termite extermination method has been devised so that it is guided into the extermination device, and its eating property is enhanced to efficiently destroy the termites.

JP 2000-189031 A (paragraph number “0029”) JP 2004-168893 A (paragraph number “0010”)

  However, in the above-mentioned conventional termite extermination method, the intake efficiency of the active ingredient in the eating behavior in which the extermination agent is ingested after being guided into the extermination device is poor, and therefore the termite group (nesting group) is killed It usually takes 3-12 months to complete the removal.

  In particular, the long-term extermination treatment period may be a period that includes the winter season, a so-called long-term treatment period. In such a case, the termite feeding rate decreases, so the extermination treatment should be performed in a short time. It was not easy.

  Moreover, mold | fungi may grow on a disinfectant during a long disinfecting treatment period, and in such a case, eating efficiency further decreases.

  In addition, if a pesticide containing a cellulosic excipient and molded into a block shape or the like is used, the surface is water repellent to some extent with a smooth smooth surface, so that when it comes into contact with rainwater, water droplets are formed by surface tension. If a film of water is formed on the surface of the tablet or termites come into contact with such water droplets or the water surface, the insect body will be attracted to the water surface by the surface tension and become trapped and trapped. For this reason, termites have the problem that they instinctively take repelling action on the water surface and the efficiency of extermination also decreases.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, activate the action of eating a termite pesticide induced in the extermination device, improve the intake efficiency of the active ingredient, and the termite group (nesting group) ) To reduce the processing time required to kill the whole and complete the extermination as much as possible, and to make it an efficient termite extermination method that can be carried out in a short period, preferably less than 3 months.

  Further, in the termite extermination method, when the termite is eaten by adding water to the extermination agent, the termite does not take repelling action and is an efficient termite extermination method.

  In order to solve the above-mentioned problems, in the present invention, a powdered or tableted tablet containing an active ingredient and a powdered and cooked wood and a cellulosic excipient are contained. The termite extermination method was prepared by placing a large number of tablets in an open container, sprinkling a predetermined amount of the powder on the tablet, and applying at least water to the powder.

  According to the disinfecting method comprising the steps described above, among the components of the powder adhering to the tablet surface, the steaming material mainly absorbs moisture quickly and contains a relatively large amount of water without forming water droplets on the tablet surface. It becomes a pesticide and termites eat well without causing repellent behavior against water droplets. In addition, the steamed material becomes moderately hard due to moisture, and enhances the eating property of termites.

  Here, the steaming material contained in the pesticide is killed by the fact that the cell walls are softened when the wood is sufficiently heated with water vapor, and the bacteria contained in the raw material wood come into contact with the high temperature water vapor. Therefore, the occurrence of decay and mold is suppressed.

  Such a steamed material is separated from lipids and absorbs water more easily than raw wood, so when it absorbs water, it becomes softer and termites are easy to eat. Furthermore, the termite repellent component contained in the fresh wood immediately after logging is removed from the steamed material by washing with heated steam, which makes the termite highly attractable.

  The reason why the termite attractability of wood is increased by steaming is because the termite repellent component is inherently contained in the tree, but it is removed by heating steam, while the attracting component is It is also considered that the concentration of the component that termites prefer is relatively increased and remains without flowing out with heated steam.

  And, such steamed material is high in palatability because it is powdered to a particle size that does not require termites to eat and eat, and the speed at which it is actually eaten is also a conventional piece of wood or cardboard It is much faster than materials.

  As described above, it is preferable to employ a powdered steamed material having a particle size in the range of 100 mesh (= 147 μm) to 10 mesh (= 1.651 mm) as a steaming material having a preferable effect on the eating speed.

  In addition, from the observation of termite ecology, the inventor of the present application has discovered the property of termites that do not actively scold those with a relatively smooth surface, but also use those properties. Thus, it has been found that the eating behavior of termites can be positively promoted by the powdery termite-attracting pesticide attached to the surface of the tablet.

  Therefore, in the termite extermination method of the present application, after spraying a predetermined amount of the powder, the powder is applied with water at least.

  When water is included in the powder, it is preferable to include water to the extent that water does not flow out of the powder. When water is included in the powder, among the components of the powder adhering to the tablet surface, the steaming material absorbs moisture quickly and also absorbs cellulose-based excipients, so water droplets are formed on the tablet surface. Therefore, it becomes a pesticide that retains a relatively large amount of water in the powder and tablets, and termites eat well without causing repellent action against water droplets. Moreover, the steamed material which absorbed water becomes moderate hardness, and raises the eating property of a termite.

  In this way, the water is not only attracted by the steaming material, but also the water that flows out of contact with the steaming material contains termite attracting ingredients, soaked into the tablet and its surroundings. By soaking water in a wide area around the disinfectant, termites are attracted, and the powdered termite attractant disinfectant soaked in water as well as tablets can be used smoothly.

  Therefore, it is also preferable that the above-mentioned termite extermination method is provided with the requirement that the bottom surface of the open container is allowed to pass water and the bottom surface is installed on the sand layer.

  In this way, even if water is added in excess of the water absorption capacity of the powder or tablet, excess water that has flowed out of the powder does not collect around the disinfectant and soaks into the sand and contains water to the extent that water does not always flow out of the powder The termite extermination method can be executed reliably.

  The present invention provides powders or tableted tablets containing a disinfectant active ingredient, preferably a steaming material having a predetermined particle size and a cellulosic excipient, and the powders are placed on a large number of tablets contained in an open container. After sprinkling a predetermined amount, water is added to the powder so that it can be applied, improving the intake efficiency of the active ingredient in the extermination device and killing the entire termite group (nesting group) to complete the extermination. There is an advantage of a termite control method that can be processed in less than 3 months or 1-2 months, which is preferably shorter than the conventional control period.

  In addition, there is an advantage of a termite control method in which termites do not take repellent behavior when water is contained in the control agent and the termites eat.

A disinfecting method according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, in this invention, first, a powdered material 1 containing a disinfecting active ingredient and powdered and cooked wood and a cellulosic excipient were formed into tablets. A tablet 2 and an open container 3 are prepared.

  The open container 3 used in the present invention may have a known open structure so that termites can enter and exit, and excess water is drained. For example, a rectangular wooden frame 4 and a rubber plate And the like. The wooden frame 4 of the container 3 is preferably formed by joining together wooden parts, and two or more wooden parts are bonded and integrated between the wooden parts via corrugated paper (not shown). Yes. In this way, when corrugated paper is interposed at the key points of the wooden frame 4 of the container 3, the corrugated paper between the two paperboards constituting the corrugated paper is arranged so that it passes through the inside and outside of the container 3 through a passage similar to an ant path. it can. Thereby, the approach action to the container 3 of the termite 7 becomes active.

The bottom plate 5 made of a rubber plate is made of a water-resistant material in which water passage holes (not shown) of an appropriate size are formed at important points, and the powder 1 and tablets 2 into the container 3 are formed. In addition to ensuring the storage capacity, submersion due to excessive supply of moisture into the container 3 is prevented.
The cover plate 6 made of rubber plate is preferably made of a waterproof or heat insulating material, prevents intrusion of rainwater or the like from the upper opening of the container 3, and has an outside temperature equal to the internal temperature of the container 3 due to heat insulation. It also has the role of suppressing the air flow inside and outside the container.

  The types of termites to be controlled are not particularly limited, and examples include Yamato termites, termites, daiko termites, American termites, sats termites, caterpillars, taiwan termites, takasago termites and other termites.

  Illustrative active ingredients are hydramethylnon, sulfuramide, abamectin, boric acid, borate or its ester, neonicotinoid compounds such as acetamprid and nitenpyram, chlorophena There are phenylpyrrole compounds such as chlorfenapyr, phenylpyrazole compounds, and oxazole etoxazole. Examples of insect growth inhibitors include flufenoxuron, teflubenzuron, diflubenzuron (diflubenzuron) diflubenzuron), hexaflumuron (hexaflumuron), lufenuron (l fenuron, bistrifluron, chitin synthesis inhibitors such as chlorofluazuron, pyriproxyfen, hydrophene, methoprene and phenoxycarb. These are juvenile hormone-like active compounds and the like, which are slow-acting termiticides.

  The cellulose-based excipient used in the present invention is composed of crystalline cellulose, foamed cellulose granules, carboxymethylcellulose (CMC), and other cellulosic materials. The crystalline cellulose is obtained by acid hydrolysis of wood pulp, and is amorphous. It is an industrially produced cellulose that removes parts and removes only pure crystalline parts. In addition to these components, a known binder may be added as necessary to prepare an appropriate hardness, and tableting may be performed.

  The steamed material used in the present invention is made of powdered and steamed wood, and is obtained by sufficiently heating steam with steam as a raw material. The temperature and pressure conditions for steaming should be set appropriately according to the performance of the steamer and the type of wood, but for such steaming purposes, the cell walls are softened, the fibers are softened, and they are included in the raw material. Killing germs and preventing spoilage and mold.

  Wood used as the raw material for steaming can be used without any particular limitation on the type of tree, for example, hardwood as well as coniferous trees can be used, among which relatively soft woody termites prefer eating A material is preferred.

  The cooked material is finally finished in a pulverized state, but it is preferable to perform the cooking and drying operation after pulverization because the production efficiency is good.

  The steamed material made of powdered and steamed wood is preferably a steamed material having a particle size of 100 to 10 mesh. This is because if the particle size is smaller than 100 mesh (particle size: 147 μm), the eating behavior of termites is too small, and the intake efficiency deteriorates. If the particle size exceeds 10 meshes (1651 μm), termites are repeatedly beaten. Otherwise, it will not be possible to eat, and in this case as well, the intake efficiency will deteriorate, which is not preferable.

  The blending ratio of the steamed material in the termite attractant control agent comprising the powder or tableted tablet in the termite attractant control agent of the present invention is preferably 5 to 50% by weight. This is because a small amount of less than 5% by weight is not preferable because the speed of eating by termites is slow, and a blending amount of more than 50% by weight is not preferable because it becomes difficult to form in a fixed form by tableting.

  In these two different types of preparation forms, the compounding ratio of the steamed material is set to 2 to 7 times (weight ratio), preferably about 4 to 6 times more in the case of powder than tablets. It is preferable for increasing the termite attractability of the agent efficiently.

  Examples of the poisoned bait mixed and mixed with powdered raw materials include those having a well-known shape such as a spherical shape, a polygonal column shape, a sphere, and an elliptical sphere in addition to the disk-shaped tablet 2 shown as a representative example. The shape is not particularly limited, and the size may be about 5 to 100 mm, preferably the size of about 20 to 50 mm, with the maximum diameter or the length of the longest part being defined as the particle size. Things are easy to handle and preferable.

  Next, as shown in FIG. 1, an open container 3 composed of a rectangular wooden frame 4 and a rubber bottom plate 5 is embedded in a well-drained ground such as a sandy layer 8 so that the opening on the upper surface can be exposed. From the opening, the tablets 2 are randomly stacked in the container 3, and the powder 1 is sprinkled uniformly over the entire surface so as to cover at least the upper surface of the tablet.

  Then, water is poured evenly from above the powder 1 or sprayed with a sprayer or the like so that the entire powder 1 is sufficiently filled with water, and the tablet 2 is also supplied with water through the powder 1, and finally Specifically, the entire amount (powder 1 and tablet 2) is allowed to absorb water so that water does not flow out of powder 1.

  In this way, the powder 1 does not form water droplets on the surface even if it contains a lot of water in its ingredients, such as a steamed material, and the attraction of termites is higher than when only the tablet 2 is placed in the container 3. Moreover, it becomes suitable hardness and raises the eating property of a termite.

  In the tablet 2, the steamed material quickly absorbs moisture and also absorbs the cellulose-based excipient, so that it becomes a disinfectant that retains a relatively large amount of water. The whole tablet 2 is also soft and enhances the eating property of the termites, and the termites eat well without causing repelling behavior.

  In the steamed material, the cell wall is soft and the fibers are soft, and the bacteria contained in the raw material are dead, so that the powder 1 and the tablet 2 are prevented from being spoiled or moldy.

  Dissolve bistrifluron as a disinfecting active ingredient in a solvent so as to have a concentration of 1.0% by weight, and mix it with 15% by weight of steamed powder (cedar powder: particle size 60 mesh), 84% by weight of crystalline cellulose was mixed and tableted into a disk shape having a diameter of 30 mm and a thickness of 5 mm to form a tablet (see FIG. 2).

  Moreover, after dissolving bistrifluron which is a disinfectant active ingredient in a solvent so as to have a concentration of 1.0% by weight and mixing it with 50% by weight of steamed material powder (cedar powder: particle size 60 mesh) Then, 49% by weight of crystalline cellulose was mixed to produce a powder.

  In the container 3 having the structure shown in FIG. 1 used in the embodiment, 90 g of the tablet 2 of the example is placed, and 30 g of the powder 1 of the example is uniformly sprinkled over the whole, and 250 g of water is evenly distributed from above. On September 16, 2004, this was embedded in the ground near a wooden building that was damaged by termites with a cover plate 6 made of a rubber plate to prevent rain.

  This was observed every week, and the damaged tablets and powder were replaced with new ones (90g of tablets and 30g of powder). When the observation was continued without replacement, the number of soldier ants decreased with no subsequent damage caused. On November 10, less than 2 months (55 days later), termites were found in the damaged part of the damaged wooden building. No longer survived.

  The total consumption of the termite-attracting pesticide consisting of powders or tableted tablets at that time was 287 g, corresponding to 1.43 g of the active ingredient bistrifluron.

  On the other hand, 90 g of the tablet of the comparative example is put in an open container made of a rectangular wooden frame and a rubber plate bottom plate, and further, 30 g of the powder of the embodiment is sprinkled uniformly on the whole from above, and 250 g of water is evenly distributed from above. When sprayed on the ground and buried in the ground with a rubber cover to protect it from rain, some mold was observed after one week, and the part was covered with ant soil. After that, no damage was observed in the pesticides thereafter.

Cross section of the test equipment for the attraction extermination effect The perspective view of the tablet used for embodiment

Explanation of symbols

1 Powder 2 Tablet 3 Container 4 Wooden frame 5 Bottom plate 6 Lid plate 7 Termite

Claims (4)

  Prepare a powdered or tableted tablet containing a pulverized and cooked wood containing cellulent active ingredients and a cellulosic excipient, and contain a large number of these tablets in an open container Then, after sprinkling a predetermined amount of the powder onto it, a termite extermination method comprising applying at least water to the powder.   The termite extermination method according to claim 1, wherein the steamed material is a powdered steamed material having a particle size of 100 to 10 mesh.   The termite extermination method according to claim 1 or 2, wherein an amount of water that does not flow out of the powder is included when water is included in the powder.   The termite extermination method according to any one of claims 1 to 3, wherein the bottom surface of the open container is provided so that water can pass through, and the bottom surface is installed in the sand layer.

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