WO2015083624A1

WO2015083624A1 - Poison bait for pests

Info

Publication number: WO2015083624A1
Application number: PCT/JP2014/081466
Authority: WO
Inventors: 梨乃安台; 優八鈴木
Original assignee: アース製薬株式会社
Priority date: 2013-12-06
Filing date: 2014-11-27
Publication date: 2015-06-11
Also published as: CN105792654B; JPWO2015083624A1; TW201601628A; CN105792654A; JP6170570B2

Abstract

The purpose of the present invention is to provide a poison pest bait that pests find appetizing. This poison bait for pests is suitable to centipede control, and contains an insecticidal component and an attractant component. Over time, this solid poison bait absorbs moisture from the atmosphere and the attractant component deliquesces such that the surface of the solid bait becomes covered with the liquefied attractant.

Description

Pest poison bait

The present invention relates to a pest poison bait, and more particularly to a pest poison bait particularly suitable for controlling centipedes.

Conventionally, in order to control pests such as centipedes, cockroaches, ants, etc., there is a method in which a pest that has a high palatability of pests and contains an insecticidal component is installed at the place where the pests are generated and eaten by the pests. .

For example, centipedes inhabit grass, stone walls, soil, etc., and eat small insects, spiders, earthworms, etc. as food, sometimes enter the house for food, lurk in furniture and shoes, Because it causes the damage of biting people and causing allergic reactions, it is targeted for control.
When a poison bait is used in controlling a centipede, it is important to attract the centipede and eat the poison bait sufficiently. In order to solve this problem, for example, in Patent Document 1 below, an attractant for centipede containing at least one of dry powder of squid, dry powder of fish white, and powder of crab shell, and the attractant And a poison bait for centipedes containing an insecticidal component.

Japanese Unexamined Patent Publication No. 2005-35922

However, even if an attractant is added to the poison bait, the eating of the pests may be affected by the hardness, softness, size, surface condition, etc. of the poison bait.
In particular, predatory pests such as centipedes prey on moving things such as small insects, so if you simply place a poison bait containing an attractant, it will not be recognized as food and you will eat it sufficiently Is difficult.

Therefore, an object of the present invention is to provide a poisonous bait that is particularly suitable for controlling centipedes and has a high eating property.

As a result of intensive research, the present inventors have devolatilized predatory pests such as centipedes to sufficiently eat the poison bait, and deliquescent the attractant component contained in the poison bait, It was found that the problem can be solved by covering the surface, and the present invention has been completed.

That is, the present invention is achieved by the following (1) to (2).
(1) A poisonous bait suitable for controlling centipedes, which contains an insecticidal component and an attracting component, absorbs moisture in the atmosphere over time, and the attracting component is deliquesced and becomes a liquid. A solid pest poison that is covered in a solid state.
(2) The pest poison bait according to (1), wherein the shortest distance from the surface of the poison bait to the center of gravity is 10 mm or less.

The pest poison bait according to the present invention has been deliquescent of the attracting component contained therein, and the liquid attracting component covers the surface of the poison bait so that the pest that has come into contact with the poison bait can be easily recognized as bait. Since the eating property is enhanced, the control effect can be enhanced. In particular, since it has a high eating property with respect to centipedes and can sufficiently eat insecticidal components, it is extremely effective for controlling centipedes.

1 (a) and 1 (b) are photographic drawings showing a state before storage in the humid environment of the pest poison for specimens 1 and 2, and FIG. 1 (a) is a pest poison for specimen 1; FIG. 1 (b) shows a pest poison bait for the specimen 2. 2 (a) and FIG. 2 (b) are photographic drawings showing the state after storage in the humid environment of the pest poison for specimens 1 and 2, FIG. 2 (a) is the pest poison for specimen 1; FIG. 2 (b) is a pest poison bait for specimen 2. FIG. 3 (a) is a photographic drawing and a schematic diagram showing a state where the wiping cloth is placed on the pest poison bait of the specimen 1 after being stored in a humidified environment, and FIG. 3 (b) is a diagram of the recovered wiping cloth. It is the photographic drawing which shows a state, and its schematic diagram. FIG. 4 (a) is a photographic drawing and a schematic diagram showing a state where the wiping cloth is placed on the pest poison bait of the specimen 2 after storage in a humidified environment, and FIG. 4 (b) is a diagram of the recovered wiping cloth. It is the photographic drawing which shows a state, and its schematic diagram. Fig.5 (a) and FIG.5 (b) are schematic which shows the form of the insect pest of this invention.

Hereinafter, embodiments of the present invention will be described in more detail. Here, the centipede, which is a suitable target, will be described in detail, but application to other pests such as grasshoppers, grasshoppers, millipedes, geese, ants, etc. is not excluded.

The pest poison bait of the present invention (hereinafter simply referred to as “poison bait”) contains an insecticidal component and an attracting component, absorbs moisture in the atmosphere over time, and the attracting component deliquesces and becomes liquid. The surface is covered with an attracting component. When the surface of the poison bait is covered with a liquid material and becomes wet, the pests can easily eat. Predatory pests such as centipedes are especially suitable for centipedes because they act as food when they are attracted to the mouth by an attracting ingredient (liquid) containing moisture. Can be controlled.

Note that “deliquesce” is a phenomenon in which a substance takes in moisture in the atmosphere and becomes an aqueous solution, and in the present invention, the attracting component in the poison bait has a deliquescent property.

The insecticidal component used in the present invention is not limited as long as it has an insecticidal effect against pests. Carbamate compounds such as carbaryl, propoxur, mesomil, thiodicarb, pyrethroids such as allethrin, resmethrin, framethrin, phthalthrin, permethrin, phenothrin, cypermethrin, ciphenothrin, praretrin, empentrin, transfluthrin, methofritrin, profluthrin, etc. Oxadiazole compounds, phenylpyrazole compounds such as fipronil, boric acid, borax, hydramethylnon, dinotefuran, Protollin, and the like. These insecticidal components may be used alone or in combination of two or more.

The compounding amount of the insecticidal component can be appropriately set in consideration of the titer as long as the deliquescent of the attracting component does not prevent the poison bait surface from being surrounded by the liquid material. Specifically, the content is preferably 0.1% by weight or more, more preferably 0.5% by weight or more in the poison bait. The upper limit is preferably less than 30% by weight.

The attracting component used in the present invention can be selected from components that are preferred by pests and that have the property of absorbing and deliquescent moisture in the atmosphere over time as described above. Examples thereof include sugars such as glucose, fructose, galactose, maltose, sucrose, dextrin, granulated sugar and brown sugar, and amino acids such as alanine, glycine, valine, aspartic acid and glutamic acid. These attracting components may be used alone or in combination of two or more.

These attracting ingredients only need to contain such an amount that the poison bait becomes liquid after absorbing moisture in the air after it is installed indoors or outdoors in a desired location, and oozes out on the surface of the poison bait. What is necessary is just to set suitably according to the shape of a poison bait, a magnitude | size, etc.

In the present invention, the shortest distance from the surface of the poison bait to the center of gravity is involved in order for the deliquescent attractant to ooze out on the surface of the poison bait. Note that the center of gravity of the poison bait may be not only the center of weight located on the axis of the poison bait but also the geometric center on the axis.
In the present invention, the poison bait is preferably molded so that the shortest distance from the surface of the poison bait to the center of gravity is 10 mm or less. By making the shortest distance from the surface of the poison bait to the center of gravity 10 mm or less, not only the attracting component close to the surface part in the poison bait but also the internal attracting component adsorbs moisture in the air and liquefies, It becomes easy to ooze out on the surface.

In addition, since the attracting component oozes more easily on the surface of the poison bait as the shortest distance from the surface of the poison bait to the center of gravity becomes shorter, the content of the attracting component can be reduced in the poison bait having a small particle size. Therefore, the content of the attracting component in the poison bait can be adjusted according to the shortest distance from the surface of the poison bait to the center of gravity.
Specifically, when the shortest distance from the surface of the poison bait to the center of gravity is less than 2 mm, it is preferable to contain at least 40% by weight of the attracting component in the bait based on the weight before deliquescent, and the shortest distance Is preferably 2% or more and less than 2.5mm, it is preferable to contain at least 60% by weight of the attracting component. When the thickness is 6 mm or more, it is preferable to contain 80% by weight or more of an attracting component. In order to sufficiently exhibit the effects of the present invention, the shortest distance is preferably 10 mm or less.

The form of the poison bait is not particularly limited as long as it is solid, and may be set as appropriate. For example, granule shape, powder shape, columnar shape, disk shape, block shape, lump shape, paste shape and the like can be mentioned. As shown in FIG. 5 (a), when the poison bait 1A is a disc-shaped preparation, the length from the surface in the axial direction X to the center of gravity of the poison bait is the shortest distance m, and as shown in FIG. 5 (b). In addition, when the poison bait 1B is a long-axis columnar preparation, the length from the surface in the direction perpendicular to the axial direction Y of the poison bait to the center of gravity (the radial length of the cut surface with respect to the axial direction Y) is the shortest. What is necessary is just to adjust the compounding quantity of an attracting component suitably as the distance n.

By adjusting the content of the attracting component according to the shortest distance from the surface to the center of gravity of the poison bait as described above, the bait is sufficiently liquefied by deliquescent action so that the pest is recognized as a food. The surface of the agent can be covered with a liquid material. If the content of the attracting component is not sufficient, the surface of the poison bait cannot be sufficiently covered with the liquid material, and it is not preferable for the pest to be recognized as food.

In the poison bait of the present invention, the attracting component absorbs moisture in the air and deliquesces, so that the surface of the poison bait can be kept moist according to changes in the natural environment such as humidity. In addition, as described above, by containing a predetermined amount or more of an attracting component according to the shortest distance from the surface of the poison bait to the center of gravity, the surface of the poison bait is liquid even in a low humidity environment such as at night or in winter. Can be covered.

In addition, when the target pest is a centipede, the centipede is nocturnal, and therefore it is preferable to adjust the blending amount of the attraction component so that the deliquescent state can be maintained overnight (for example, 12 to 16 hours).

In addition to the deliquescent attracting and insecticidal components described above, various known components can be blended with the poison bait of the present invention as required. Examples of other components include excipients, antioxidants, preservatives, anticorrosive agents, solvents, and the like.

Examples of the excipient include white carbon, diatomaceous earth, crystalline cellulose, clay, kaolin, talc, bentonite, silica, carboxymethylcellulose, paraffin, polyethylene glycol, styrene resin, and silicone resin.

Examples of the antioxidant include erythorbic acid, sodium erythorbate, dibutylhydroxytoluene, dl-α-tocopherol, butylhydroxyanisole, propyl gallate and the like.

Examples of preservatives include benzoic acid, sodium benzoate, benzyl benzoate, benzyl salicylate, salicylic acid, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, parahydroxybenzoic acid ester, calcium propionate, sodium propionate, And cetylpyridinium chloride.

Examples of the anti-fouling agent include denatonium benzoate and pepper powder.

Examples of the solvent include water, alcohols such as isopropyl alcohol, ethanol and glycerin, glycols such as propylene glycol and ethylene glycol, and paraffins.

In addition to this, a fragrance, a colorant, a pH adjuster, and the like can be used as necessary.

Furthermore, in the present invention, other attracting ingredients that do not have deliquescent properties, for example, pupa flour, cornstarch, wasp, beef, egg, krill, shrimp, cheese, livestock meat, fish meat, Starch, wheat flour, bran, beans, rice bran, seeds, cottonseed, palm oil, olive oil, meat oil, fish oil, sesame oil and the like can also be used.

As a method for preparing the poisonous bait of the present invention, a known method is employed, and examples thereof include a method of mixing and tableting raw material components, and a granulation method.

The poison bait of the present invention is preferably packaged and stored so that its surface is in a dry state when not in use and is in a deliquescent state when in use. By making the non-use time dry, the handling property at the time of distribution or storage can be improved. In order to keep the poison bait of the present invention in a dry state when not in use, for example, it is stored in a container or bag having airtightness with a desiccant such as silica gel until the poison bait is used. It is preferable to keep a very low state.

In the present invention, it is possible to visually confirm the deliquescent state in which the attracting component is deliquescent and the surface of the poisonous bait is covered with a liquid material during use. In addition, when a wiping cloth made of pulp (for example, “Kimwipe S-200” manufactured by Nippon Paper Industries Co., Ltd.) is brought into contact for about 5 seconds without applying a load, the attracting component that has become a liquid forms on the surface of the wiping cloth made of pulp. It can also be confirmed by the phenomenon of adhesion.

Hereinafter, the present invention will be further described by the following test examples, but the present invention is not limited to the following examples.

<Aging test of poison bait>
4.5 parts by weight of water and 3 parts by weight of ethanol are added to 100 parts by weight of the bait base shown in Table 1 and kneaded. As shown in FIG. 5 (b), the diameter is about 5 mm and the length is about 10 mm. A poisonous bait was obtained by molding into a cylindrical shape (Samples 1 and 2). Subsequently, about 1 g of each obtained poisonous bait was stored for 72 hours under the conditions of 20 to 23 ° C. and humidity of 100%.
The state of the poison bait immediately after molding is shown in FIGS. 1 (a) and 1 (b), and the state of the poison bait after storage is shown in FIGS. 2 (a) and 2 (b). 1 (a) and 2 (a) show the poison bait of specimen 1, and FIGS. 1 (b) and 2 (b) show the poison bait of specimen 2. FIG.

From the results of FIGS. 2 (a) and 2 (b), the poison bait of specimen 1 absorbs moisture in the atmosphere over time during storage and the attracting component is deliquescent, and the attracting component that has become liquid It was found that the surface was covered. On the other hand, in the poison bait of the specimen 2, the attracting component did not deliquesce, and almost no change in shape was observed before and after storage.

<Check moisture absorption of poison bait>
About 1 g of the poisonous bait of specimens 1 and 2, the weight increase rate after storage for 72 hours under the conditions of 20 to 23 ° C. and 100% humidity was determined by the following formula. The test was performed twice for each specimen, and the average was obtained. The results are shown in Table 2.
Weight increase ratio due to moisture absorption = Poisonous bait weight after storage / Poisonous bait weight before storage

From the results in Table 2, it can be seen that the weight increase ratios due to moisture absorption after storage of the poison baits of Sample 1 and Sample 2 are similar, and there is no significant difference. As shown in FIGS. 2 (a) and 2 (b), the poison bait of the specimen 1 is in a state in which the surface is covered with a liquid after storage, whereas the poison bait of the specimen 2 is almost changed. In contrast, specimen 1 absorbs moisture in the atmosphere over time and the attracting component deliquesces and oozes out on the surface of the poison bait, whereas specimen 2 absorbs moisture throughout the poison bait. It is thought that moisture is taken into the poison bait.

<Poison bait surface condition confirmation test>
A wiping cloth (“Kimwipe S-200” manufactured by Nippon Paper Industries Co., Ltd.) cut into a 1 cm-wide strip is placed on the poisonous bait without applying a load to the poisonous bait of specimens 1 and 2 after storage. And left for 5 seconds. Thereafter, the wiping cloth was collected, and the surface state of the wiping cloth was visually confirmed. The results of the sample 1 are shown in FIGS. 3 (a) and 3 (b), and the results of the sample 2 are shown in FIGS. 4 (a) and 4 (b).

As shown in FIG. 3A, the poison bait of the specimen 1 after storage is absorbed by the wiping cloth immediately after contact with the wiping cloth, and the liquid attracting component covering the surface of the poison bait is absorbed. As shown in FIG. 3 (b), a part of the poison bait was attached to the surface of the wiping cloth collected after 5 seconds together with the attracting component that became liquid. On the other hand, the poison bait of the specimen 2 did not adhere to the wiping cloth surface as shown in FIGS. 4 (a) and 4 (b).
This also shows that the surface condition of the poison bait of the specimen 1 changes with time.

<Eating test 1>
Using the poisonous baits of Samples 1 and 2 after storage, the eating ability of centipedes was evaluated.
One Tobism cadet about 20 cm in length was released in a cage (length 30 cm, width 50 cm, depth 40 cm) in which about 1 g of the poison bait after storage of specimens 1 and 2 was placed, and when the centipede first contacted the poison bait It was investigated whether or not the agent was eaten. The test was repeated 5 times.

As a result of the test, when the poison bait of the specimen 1 was used, it was confirmed that the poison bait was eaten by all the centipedes, but when using the poison bait of the specimen 2, all the centipedes approached the poison bait. I did not eat poisonous bait.

<Eating test 2>
4.5 parts by weight of water and 3 parts by weight of ethanol are added to 100 parts by weight of the bait base shown in Table 3 and kneaded. As shown in FIG. 5B, the diameter is about 5 mm and the length is about 10 mm. A poisonous bait was obtained by molding into a cylindrical shape (Samples 3 to 5). Subsequently, about 1 g of each poisonous bait obtained was stored for 72 hours under conditions of 20 to 23 ° C. and 100% humidity.
Each specimen after storage was visually observed to be in a deliquescent state, and the case where the surface of the poison bait was covered with a liquid substance was evaluated as “◯”, and the case where the deliquesce state could not be confirmed was evaluated as “x”.
It was confirmed that the poison baits of Samples 3 to 5 absorbed moisture in the atmosphere over time, and the attracting component was deliquescent, and the surface was covered with the attracting component that became liquid. The results are shown in Table 3.

Next, the eating habits of centipedes were evaluated for specimens 3 to 5 using poisonous baits before and after storage.
Release a single Tobism cadet about 20 cm long in a cage (length 30 cm, width 50 cm, depth 40 cm) with about 1 g of prey and pre-storage poison baits for specimens 3-5, and the centipede first contacts the poison bait. It was investigated whether or not the poison bait was eaten. What the centipede had eaten was rated as “◯”, and what the centipede did not eat was evaluated as “x”. The test was repeated 5 times. In addition, the centipede lethality in each specimen was also determined. The results are shown in Table 4.

From the results shown in Table 4, in the poison bait with the shortest distance from the surface to the center of gravity of 2.5 mm, none of the specimens 3 to 5 was confirmed to be eaten by centipedes in the bait before storage. However, in the state after storage, the poison baits of specimens 3 to 5 had a feeding rate of 60% or more, and all the centipedes that had been eaten were dead. In particular, it was confirmed that all centipedes in the specimen 3 after storage were killed by eating poisonous bait.

<Eating test 3>
4.5 parts by weight of water and 3 parts by weight of ethanol are added to 100 parts by weight of the bait base shown in Table 5 and kneaded. As shown in FIG. 5B, the diameter is about 2 mm and the length is about 5 mm. To obtain a poisonous bait (specimens 6 to 10). Subsequently, about 0.5 g of each poisonous bait obtained was stored for 48 hours at 20-23 ° C. and 100% humidity.

Each specimen after storage was visually observed, and the surface state of the poison bait was observed in the same manner as in the <Eating Test 2>.
It was confirmed that the poisonous baits of Samples 6 to 8 absorbed moisture in the atmosphere over time, and the attracting component was deliquescent, and the surface was covered with the attracting component that became liquid. No deliquescent phenomenon after storage was confirmed for the 9 and 10 poison baits.
Moreover, the weight increase rate by moisture absorption of a poison bait was calculated | required by said formula. The results are also shown in Table 6.

Next, with respect to specimens 6 to 10, the eating ability of the centipede was evaluated in the same manner as in <Eating Test 2>, and the lethality was obtained. In addition, about 0.5 g of poison bait was used. The results are shown in Table 7.

From the results in Table 7, in the poison bait with the shortest distance from the surface to the center of gravity of 1 mm, the poison baits of specimens 6 to 8 were not confirmed to eat any centipede before storage, but in the state after storage, The eating rate was 100%, and all the centipedes that were eaten were deadly. On the other hand, it is considered that the poisonous baits of the specimens 9 and 10 were hardly eaten in the state after storage, and the centipede did not recognize the bait.

<Eating test 4>
To 100 parts by weight of the bait base shown in Table 8, 4.5 parts by weight of water and 3 parts by weight of ethanol are added and kneaded, and as shown in FIG. 5 (a), the diameter is about 20 mm and the thickness is about 20 mm. Tableting was performed in a disk shape to obtain a poison bait (Samples 11 to 13). Subsequently, about 5 to 8 g of each poisonous bait obtained was stored for 48 hours under the conditions of 20 to 23 ° C. and 100% humidity.

Each specimen after storage was visually observed, and the surface state of the poison bait was observed in the same manner as in the <Eating Test 2>.
It was confirmed that the poisonous baits of Samples 11 and 12 absorbed moisture in the atmosphere over time, and the attracting component was deliquescent, and the surface was covered with the attracting component that became liquid. Thirteen poison baits did not show deliquescence after storage.
Moreover, the weight increase rate by moisture absorption of a poison bait was calculated | required by said formula. The results are also shown in Table 9.

Next, with respect to the specimens 11 to 13, the eating ability of the centipede was evaluated in the same manner as in the <eating test 2>, and the lethality was obtained. The poison bait was used in an amount of about 5 to 8 g, and the test was repeated 6 times. The results are shown in Table 10.

From the results in Table 10, in the poisonous bait with the shortest distance from the surface to the center of gravity of 10 mm, the specimens 11 and 12 containing at least 80% by weight of the attracting component are in a deliquescent state. It turned out that it can raise.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. This application is based on a Japanese patent application filed on December 6, 2013 (Japanese Patent Application No. 2013-253645), the contents of which are incorporated herein by reference.

1A, 1B Poisonous bait m The shortest distance from the axial surface to the center of gravity of the discoid poisonous bait n The shortest distance from the axial surface of the cylindrical poisonous bait to the center of gravity

Claims

A poisonous bait suitable for centipede control, which contains an insecticidal component and an attracting component, absorbs moisture in the atmosphere over time, and the attracting component is deliquescent, and the surface is covered with the attracting component that has become liquid. A solid pest bait that can be broken.
The pest poison bait according to claim 1, wherein the shortest distance from the surface of the poison bait to the center of gravity is 10 mm or less.