JP5134965B2 - Rodenticide composition and method for delaying decay progression - Google Patents

Description

  The present invention, for example, a decay progress retarder capable of delaying the progress of decay of a carcass of a harmful small animal such as a moth, a rodenticide composition and a method of delaying the progress of decay, and a pest such as a fly through a carcass of the harmful small animal. The present invention relates to an indirect pest control method.

  Conventionally, rodenticides have been used to combat spiders that are harmful small animals (see, for example, Patent Document 1). Because it occurs, there is a problem that the carcass is corrupted and its outer shape collapses. It is not preferable that the outline of the mortuary body collapses because it has a significant discomfort when it is collected.

  In addition, there is a problem that secondary sanitary damage is caused by sputum generated in a decayed dead carcass, which is undesirable in terms of hygiene and miscellaneous bacteria grow.

The problem that the above-mentioned wrinkles occur and the death carcasses become corrupted, and the outer shape of the carcasses collapses, for example, is likely to occur in dead wrinkles such as outdoors or behind the ceiling, particularly in summer. Further, in order to delay the progress of the decay, a method of blending a preservative into the rodenticide can be considered, but the current situation is that the progress of the decay has not been sufficiently delayed.
JP 2001-288013 A

  Therefore, it has been desired to develop a rodenticide capable of delaying the progression of death in carcasses, that is, an agent for delaying the progression of decay in harmful small animals.

It is an object of the present invention to provide a toxic small animal decay progression retarding agent, a rodenticide composition, and a decay progression retarding method, which have an effect of delaying the decay progression of harmful small animals.
Another object of the present invention is to provide an indirect pest control method for controlling pests through the carcasses of harmful small animals.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a specific compound having an ovicidal or slaughtering effect on flies has an effect of delaying the progression of decay in harmful small animals, which has never been achieved before. As a result, the present inventors have completed the present invention.

That is, rodenticide compositions of the present invention is characterized with di fetish A roll, to have free and emamectin benzoate.
In concrete terms, the delays furan progression of harmful small animals, toxic small animals containing di fetish A roll poison bait, often to formulate emamectin benzoate, which harmful small animal passage or nest Place it close.
Moreover, in this invention, a pest can be controlled through the carcass of the harmful small animal which ingested the said decay progress retarder (for example, the said rodenticide composition).

  According to the present invention, the specific compound having the action of egg killing or killing flies has the effect of delaying the progress of the decay of the harmful small animals (the decay of the progress of the decay). As a result, the discomfort of the carcass processing can be reduced. In addition, when the compound is contained as an active ingredient, it is possible to prevent secondary sanitary damage caused by the occurrence of wrinkles on the dead bodies of harmful small animals. Furthermore, since the specific compound has a pest control function, it is possible to control pests crowded on the carcass through the carcasses of harmful small animals that have ingested a bait containing the compound. For this reason, if a pest, such as a fly, lays eggs in the dead cage, it is possible to reduce the occurrence of pupae.

  The harmful small animal decay progression retarding agent of the present invention contains a compound having an effect of killing or killing flies as an active ingredient. Examples of the compound having an ovicidal action of flies include triflumulone, thiourea, benzoylurea, diflubenzuron, perflumuron, N- (4-chlorophenyl) N ′-(2,6-difluorobenzoyl) urea, alanosine (L-2). -Amino-3-hydroxynitrosamine propionic acid), camptothecin, disodium octaborate tetrahydrate, and the like, but the present invention is not limited to these compounds. Any compound that does not hinder the practice of the invention may be used. Moreover, these compounds may be used independently or can also use 2 or more types together.

  Examples of the compound having a killing action of the fly include abamectin, emamectin benzoate (trade name: Afarm), derivatives and analogs thereof, cresol, orthodichlorobenzene, metacresol, chlorpyrifosmethyl, dichlorovos, Examples include diazinon, trichlorfone, pyridafenthion, fenthion, prothiophos, propentaphos, insecticidal chrysanthemum extract, etoc, fipronil, chlorfenapyr, permethrin, phthalthrin, propetanephos, diflubenzuron, bromophos, etc., but the present invention is not limited to these. Any compound that has a rodenticidal action and does not hinder the practice of the present invention may be used. Moreover, these compounds may be used independently or can also use 2 or more types together. Furthermore, it is also possible to use together with the compound which has the ovicidal action of the fly illustrated above.

  In the present invention, among the compounds exemplified above, preferred compounds include abamectin, emamectin benzoate (Afam), derivatives and analogs thereof, and fipronil. Particularly preferred compounds are Emamectin benzoate (Affirm). And fipronil. Emamectin benzoate is an analog of abamectin having a 16-membered ring alkaloid.

  The above-mentioned decay progression retarding agent of the present invention containing a compound having an egg killing or killing action as an active ingredient is not to be administered to the carcass of a harmful small animal, but to feed a living harmful small animal. The secondary sanitary damage caused by the occurrence of wrinkles on the carcasses of small harmful animals that have consumed the decay progress retarder is prevented, and the outer shape of the carcasses is prevented from being collapsed due to the progress of the decay. In this respect, for example, it is different from preservation of a corpse by immersing the corpse in formalin.

  The flies targeted by the above-mentioned compounds having egg killing or killing action are not particularly limited, and examples thereof include Drosophila, flea flies, fly flies, house flies, black flies, yellow flies, powder flies, fly flies, and fly flies. . In addition, the pupa in this invention means larvae, such as a fly.

  In addition, examples of harmful small animals targeted by the decay retardant of the present invention include, for example, white shark, dove moth, bear moth, hatsuka moth, Ezo yachi moth, grouper moth, red fox moth, etc .; white beetle, azuma moth, earthworm, earthworm, Mole such as Mizura Mole, Saddle Mole; Weasel; Bats; Pigeons; Crow; Other harmful small animals that need to be recovered.

  The dosage form of the above-mentioned decay progression retarding agent is optional as long as it does not interfere with the egg killing or killing action of flies and the decay progression delaying effect of harmful small animals. Preferably it has a form for feeding small animals. The form is not particularly limited as long as it is a diet form, and examples thereof include a poison bait form.

  The poison baits are not particularly limited, and various known poison baits that can be used for extermination of target harmful small animals can be employed. The poisonous bait is mixed with the compound having the effect of killing or killing the fly as an active ingredient in an amount necessary to bring about the effect of killing or killing the fly and the effect of delaying the decay of harmful animals. . Specifically, the compound is 0.001 to 10% by weight, preferably 0.01 to 3% by weight, more preferably 0.01 to 1% by weight based on the total amount of poisonous bait (corrosion progression retarder) as an active ingredient. It is good to contain in the ratio of weight%. Thereby, poison bait (corrosion progress retarder) can show the egg-killing or killing action of a fly, and the progress-promoting effect of decay. On the other hand, if the content is lower than 0.001% by weight, the effect may not be sufficient. Moreover, when it exceeds 10 weight%, it will contain more than necessary and there exists a possibility that the feeding property of this poison bait (corrosion progress retarder) with respect to a harmful small animal may fall.

  The poison bait may be blended with additives such as preservatives, deodorants and deodorants, dietary ingredients, attractants, fragrances, antioxidants, preservatives, pigments, and anti-fouling agents. . The formulation of the bait is also not particularly limited, and for example, the compound having the action of killing or killing the fly and the bait may be formulated separately, and then mixed and formulated. . Hereinafter, although the rodenticide composition will be described, it can be similarly applied to other poison baits.

  The rodenticide composition of the present invention comprises a rodenticide and a compound having the above-described fly ovum killing or killing action. As a result, it is possible to prevent the death carcasses that have eaten the rodenticide composition from generating wrinkles, and to prevent the external appearance of the death carcass from collapsing due to the progress of decay. Can be recovered.

  In particular, emamectin benzoate (afarm) or fipronil is preferable as the compound having the rodenticidal action of the fly contained in the rodenticide composition. A rodenticide composition containing these compounds can surely exhibit the effects described above.

In the rodenticide composition, 0.001 to 10% by weight, preferably 0.01 to 0.5% by weight, more preferably, the compound having the egg-killing or killing action of the fly is based on the total amount of the rodenticide composition. Is preferably blended at a ratio of 0.01 to 0.1% by weight. In particular, the amount of the compound is 0.005% by weight (50 ppm) or more, preferably 0.02% by weight (200 ppm) or more, more preferably 0.03% by weight (300 ppm) or more based on the total amount of the rodenticide composition. When blended, an excellent effect of delaying the progress of decay can be exhibited. On the other hand, when the blending amount is lower than 0.001% by weight, wrinkles are generated, and there is a possibility that the outer shape of the cadaver is destroyed. When it exceeds 10% by weight, the eating ability of the wrinkles may be lowered. Examples of the wrinkle targeted by the rodenticide composition of the present invention include the same wrinkles as those exemplified for the above-mentioned decay progression retarder.
In particular, when the compound having a fly killing action is fipronil, the fipronil is 0.01% by weight (100 ppm) or more, preferably 0.02% by weight (200 ppm) to 0% with respect to the total amount of the rodenticide composition. It is good to mix | blend in the ratio of 0.05 weight% (500 ppm). As a result, it is possible to show an excellent effect of delaying the progress of decay without lowering the food intake of the straw.

  The rodenticide is not particularly limited, and various known compounds known as rodenticides can be used. Specifically, for example, coumarin compounds such as warfarin, coumatetralyl, bromadiolone, and difetialol. In addition, sililoside, norbomide, antuo, thiourea derivatives, diphansinone, chlorofacinone, difacinone, pindon, bromide, diodolone, brodifam, flocumafen and the like can be mentioned. These compounds may be used alone or in combination of two or more.

  The content of the rodenticide is 1 to 1000 ppm, preferably 10 to 500 ppm, based on the total amount of the rodenticide composition. Thereby, a rodenticide composition can show rodenticidal power. On the other hand, if the content is lower than 1 ppm, the rodenticidal power may be low, and if it exceeds 1000 ppm, it will be contained more than necessary, and the food intake of the straw may be reduced, which is not preferable.

  The rodenticide composition may contain, for example, a preservative, a deodorant and a deodorant. As the preservative, various known preservatives that can be contained in the rodenticide composition can be employed. Specifically, for example, boric acid, potassium sorbate, sodium benzoate, cetylpyridinium chloride, etc. And antibiotics such as penicillin and streptomycin, and these may be used alone or in combination of two or more. Examples of the deodorant and deodorant include lauric acid methacrylate, geranyl crotonate, myristyl acid acetate, paramethylacetophenone benzaldehyde, benzyl acetate, benzyl propionate, amylcinnamic aldehyde, methyl benzoate, ethyl benzoate, phenylacetic acid Examples include methyl, ethyl phenylacetate, neoline, safrole, sedawood oil, seda vegetable oil, citronella oil, lavanten oil, petigrain oil, lemongrass oil, green tea extract, tea extract, polyphenol, etc., one or two of these You may mix and use the above.

  The content of the preservative is preferably 0.01 to 1% by weight with respect to the total amount of the rodenticide composition, and the content of the deodorant and the deodorizer is preferably 0.00 with respect to the total amount of the rodenticide composition. It is preferable that it is 05-20.0 weight%.

  Moreover, it is preferable that the said rodenticide composition contains a diet component in order to improve the feeding property of a cocoon. Examples of the diet component include proteins, carbohydrates and lipids. Examples of the protein include animal protein and plant protein. Examples of the animal protein include actin, albumin, egg, casein, fibrin, fibrinogen, keratin, α-, β-, γ-globulin, hemoglobin. , Lactoglobulin, myosin, pepsin, phosphorylase, ribonuclease, fish soluble, etc. or locust, grasshopper, mantis, cricket, cockroach, grasshopper, butterfly, moth, fly, krill, cattle, horse, carp, fish, shellfish, etc. Can be mentioned. Examples of the plant protein include edestin, zein, gliadin, etc., allatin (peanut), globulin (pumpkin seeds, wheat bran), zein (flour), gluten (wheat, corn), phaseolin (broad bean), soybean And the like obtained from the above. In addition to those exemplified above, various amino acids such as proline may be used as the final degradation product of the protein, and these proteins may be used alone or in combination of two or more.

  Examples of the carbohydrate include fruit juice, honey, waste sugar honey, maltose, isomeric fructose, sucrose, sugar millet, sugar, sucrose, brown sugar, palatinose, trehanose, sucrose, sophorose, kojibiose, tulanose, laminaribiose, nigerose, maltose , Cellobiose, lactose, xylobiose, leucorose, gentiobiose, isomaltose, melibiose, rutinose, primberose, vicyanose, robinose, D-glucose, N-acetyl-D-glucosamine, D-galactose, D-galacturonic acid, D-mannose, D -Xylose, D-fructose, L-arabinose, D-glucuronic acid, D-glucosamine, L-fucose, etc., and grains containing these as main components can be used. They may be mixed and used more species or in combination.

  As the lipid, at least one of oils such as vegetable oil and animal oil (including those that become oily by heating) can be used. Examples of the vegetable oil include tree wax, coconut oil, cacao butter, Vegetable oil such as dairy oil, non-drying oil such as castor oil, olive oil, peanut oil, semi-drying oil such as soybean oil, corn oil, rapeseed oil, sesame oil, cottonseed oil, linseed oil, tung oil, hemp seed oil, eno oil And the like. Examples of animal oils include body fat, butter fat, leg oil, which are mammalian fats, fats and oils obtained from birds, reptiles, amphibians, insects, whale oil, dolphin oil, sardine oil, herring oil, cod liver oil, shark liver oil. , Squid oil, clam oil, egg oil, microbial oil or fat, and fats and oils from yeast, bacteria, and the like. These may be used alone or in combination of two or more.

  It is preferable that content of the said diet component is 5-99 weight% with respect to the total amount of a rodenticide composition. Thereby, the eating property of a candy can be improved.

  Moreover, you may add various additives normally used for a rodenticide composition, for example, an attractant, a fragrance | flavor, antioxidant, a preservative, a pigment | dye, an anti-corrosion agent, etc. to the said rodenticide composition. Examples of the attractant include butter, sugar, molasses and the like, and examples of the flavor include cheese flavor, butter flavor, peanut flavor, peach flavor, strawberry flavor, milk flavor and the like. Is, for example, erythorbic acid, sodium erythorbate, dl-α-tocopherol, nordihydroguaiaretic acid, methylhydroxyanisole, propyl gallate, guaiac fat, L-cystine hydrochloride, etc. Examples include benzoic acid, sodium benzoate, salicylic acid, diphenyl, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, calcium propionate, sodium propionate, etc. .

  Examples of the dye include amaranth, amaranth aluminum lake, erythrosin, erythrosin aluminum lake, neucoccin, phloxine, rose bengal, acid red, tartrazine, tartrazine aluminum lake, sunset yellow FCF, sunset yellow FCF aluminum lake, Fast green FCF, fast green FCF aluminum lake, brilliant blue FCF, brilliant blue FCF aluminum lake, indigo carmine, indigo carmine aluminum lake, β-carotene, copper chlorophyll, etc. are mentioned. And denatonium benzoate.

  These compounds exemplified as the attractant, the fragrance, the antioxidant, the preservative, the pigment, and the anti-corrosion agent may be used alone or in combination of two or more. In addition, the content of each of these additives is not particularly limited, and the appearance of the death carcass is destroyed due to the progress of decay without causing wrinkles in the carcass eating the rodenticide composition. It is optional as long as there is no.

  Specifically, for example, the content of the attractant is preferably 0 to 50% by weight with respect to the total amount of the rodenticide composition. Moreover, it is preferable that each content of the said fragrance | flavor, antioxidant, a preservative, a pigment | dye, and an accidental eating prevention agent is 0 to 1 weight% with respect to the total amount of a rodenticide composition, respectively.

  The rodenticide composition containing the decay progression retarder is not administered to the death carcass, as in the case of the decay progress retarder described above, but is fed to the living rabbit, and the rodenticide composition is consumed. It is different from preservation of carcasses in that it prevents secondary sanitary damage caused by the occurrence of spears on the eaten carcasses and prevents the carcass from collapsing due to the ongoing decay.

  In addition, the dosage form of the above-described rodenticide composition is arbitrary as long as it does not hinder the egg-killing or killing action of flies and the effect of delaying the decay of decay of death. Further, the formulation of the rodenticide composition is not particularly limited. For example, the compound having the action of killing or killing the fly and the rodenticide are formulated separately, and then these are mixed to prepare the formulation. May be used.

  Next, the decay progress delay method of the present invention will be described. The method for delaying the progress of decay according to the present invention is a method of blending a poisonous bait for a harmful small animal with a compound having an effect of killing or killing flies to delay the decay of the carcass of the harmful small animal. Specifically, a poison bait formulated with a compound having an egg killing or killing action is placed near the passage or nest of harmful small animals. This is because, as described above, the compound having the action of killing or killing flies has a delaying effect on the progression of decay of harmful small animals, and when the harmful small animals eat and kill the poisonous food containing the compound as an active ingredient. The decay of the carcasses of the harmful small animals can be delayed. In other words, secondary sanitary damage caused by the occurrence of traps on the carcasses of small toxic animals can be prevented, and the carcass can be prevented from collapsing due to the ongoing decay. Can be reduced.

  The poison bait is preferably disposed in an amount effective to delay the progress of the decay of the carcasses of the small harmful animals. Specifically, the effective amount for delaying the decay of the carcass of the harmful small animal is 3 mg or more, preferably 7 mg or more, more preferably 7 to 15 mg per 1 kg of the body weight of the harmful small animal. As a result, it is possible to reliably delay the progress of the decay of the carcasses of harmful small animals that have been killed by eating the poisonous bait.

  Another method of delaying the progression of decay according to the present invention is to delay the decay progression of a carcass that has eaten the rodenticide composition by disposing the rodenticide composition described above near the passage or nest of the rod. It is. As described above, the rodenticide composition according to the present invention contains a compound having an action of killing or killing the flies, so that a moth that has eaten the rodenticide composition is exposed to human eyes in summer, for example. Even if they die, they can prevent secondary sanitary damage due to the occurrence of cocoon in the mortuary and prevent the death of the mortuary from being deformed due to the ongoing decay. It is possible to recover cadaver without having a pleasant feeling.

  Next, the indirect pest control method of the present invention will be described. The indirect pest control method of the present invention controls pests through the dead carcasses of the harmful small animals that have been fed with the above-described harmful small animal decay progression retarder. Here, in addition to the effect of delaying the progression of decay of harmful small animals, the compound having the effect of killing or killing flies contained in the decay progression retarder according to the present invention controls pests (insecticide, knockdown, etc.). It also has an effect. For this reason, the carcasses of small harmful animals that have ingested a decay progression retarder containing the compound can indirectly control the pests that gather on the carcasses.

  The pest to be controlled is not particularly limited as long as it is a pest that gathers in the carcass of a small harmful animal. Abu, such as Abu, Mekurabu, Gomafubu, etc .; Blackfish, Kiashiobyu, Aokitsugegebuyu, etc .; Is mentioned.

  Another indirect pest control method of the present invention is to control pests through mortuaries fed with the rodenticide composition described above. As described above, the compound having the effect of killing or killing flies has the effect of controlling pests (insecticide, knockdown, etc.) in addition to the effect of delaying the decay of small harmful animals. Pests can be controlled indirectly through mortuaries that have consumed the rodenticide composition.

As a result, for example, even in the summer, even if a moth dies in an unseen area, the mortuary eats a predetermined rodenticide composition, and therefore has an effect of controlling pests indirectly (indirect pest control effect). Demonstrate and prevent insects such as flies from gathering in the dead.
In addition, the decay progress retarder of this invention is not limited to the form of a poison bait, You may mix with a poison bait in the form of a food, or may be used along with a poison bait.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited only to a following example.

  A total of the rodenticide composition is formulated with 25 ppm rodenticide (diphethialol) and a compound having a rodenticide action (emamectin benzoate) in a proportion of 0.1% by weight, respectively. Was prepared. Next, a carcass of a dob moth that has eaten the rodenticide composition, an adult golden flies (50 male and female mixed) for planting the carcass in the carcass, a water container containing water and having an open top surface, sugar cubes, Was placed in a cage (width: 50 cm, depth: 30 cm, height: 50 cm) and allowed to stand for 10 days at a room temperature of 25 ° C. and a humidity of around 50%, and then the presence or absence of mortalities and the occurrence of wrinkles were evaluated. Moreover, the indirect pest control effect was also evaluated. Each evaluation method is shown below, and the results are shown in Table 1. In addition, the said water container and sugar cube are aimed at the nutritional supplementation of the fruit fly adult.

(Existence of mortuary shape collapse)
Evaluation was made by visually observing the outer shape of the mortuary after standing at room temperature of 25 ° C. and humidity of around 50% for 10 days. The evaluation criteria were set as follows.
○: The outline of the mortuary is not broken ×: The outline of the mortuary is broken

(Wrinkle occurrence)
Evaluation was made by visually observing carcasses after standing at room temperature of 25 ° C. and humidity of around 50% for 10 days. The evaluation criteria were set as follows.
○: No wrinkle occurred ×: Wrinkle occurred

(Indirect pest control effect 1)
Evaluation was made by visually observing the survival of adult fly flies after standing at room temperature of 25 ° C. and humidity of around 50% for 5 days. The evaluation criteria were set as follows.
○: All adult fly flies are dead ×: One or more adult fly flies are alive

(Indirect pest control effect 2)
If the result of the evaluation of the above indirect pest control effect 1 is ○, that is, if all the adult fly flies are left dead after standing for 5 days at room temperature of 25 ° C and humidity of about 50%, new adult fly fly (50 male and female mixed) After being left in a cage and allowed to stand at room temperature of 25 ° C. and a humidity of around 50% for 5 days (in the above-mentioned evaluation of the presence or absence of mortalities and the occurrence of wrinkles), newly introduced adult fruit fly Survival was evaluated by visual observation. The evaluation criteria were set as follows.
○: All adult fly flies are dead ×: One or more adult fly flies are alive

  A rodenticide composition (granules) was prepared in the same manner as in Example 1 except that fipronil was used in place of the emamectin benzoate as a compound having a fly rodenticidal action. Subsequently, in the same manner as in Example 1 above, the presence or absence of mortalities, the presence or absence of wrinkles, and indirect pest control effects 1 and 2 were evaluated. The results are shown in Table 1.

[Comparative Example 1]
A rodenticide composition (granules) was prepared in the same manner as in Example 1 except that a compound having a fly rodenticidal action (emamectin benzoate) was not added. Subsequently, in the same manner as in Example 1 above, the presence or absence of mortalities, the presence or absence of wrinkles, and indirect pest control effects 1 and 2 were evaluated. The results are shown in Table 1.

  As is clear from Table 1, the carcasses of Example 1 and Example 2 ingesting a rodenticide composition containing a compound (emamectin benzoate / fipronil) having a fly rodenticidal action are not deformed. It can be seen that no soot has occurred. In addition, all adult flies that were put together with mortuaries for planting the pupae were dead by the fifth day (indirect pest control effect 1). It can be seen that all were dead by the day (indirect pest control effect 2). On the other hand, the death carcass of Comparative Example 1 ingesting a rodenticide composition not containing a compound having a fly killing action had a broken outer shape and a large amount of wrinkles were generated. Almost all adult flies were alive.

  The effect of the dose of fipronil on wrinkles was evaluated on the effect of suppressing wrinkle generation and on the collapse of the cadaver. Specifically, the rodenticide (difetialol) is compounded in a proportion of 25 ppm and the compound having the rodenticide action (fipronil) in a proportion of 0.01% by weight (100 ppm) with respect to the total amount of the rodenticide composition. A composition (granule) was prepared.

  Subsequently, after the rats were fed with the rodenticide composition in the amount shown in Table 2, the rats were given granules containing 25 ppm of difetialol in order to quickly kill the rats. A cage (width: 50 cm, depth: 30 cm) of a dead carcass of this rat, an adult golden fly (30 male and female mixed) for planting the carcass in the carcass, a water container containing water and having an open upper surface, and sugar cubes , Height: 50 cm), and left for 7 days at room temperature of 25 ° C. and a humidity of about 50%, and then evaluated for the effect of suppressing the occurrence of wrinkles and the appearance of mortuary limbs. Each evaluation method is shown below, and the results are shown in Table 2. In addition, the said water container and sugar cube are aiming at the nutritional supplementation of the fruit fly adult like the said Example 1. FIG. In each evaluation, the number of measurements (n) was n = 10. The “fipronil dose” in Table 1 means the fipronil dose per kg of rat.

(Suppression effect of wrinkle generation)
Evaluation was made by visually observing death carcasses after standing for 7 days at room temperature of 25 ° C. and humidity of around 50%. The evaluation criteria were set as follows.
○: Egg laying was confirmed but not hatched △: Egg hatched but lethal in the state of 1st instar larvae x: Occurrence of pupae over 3 years of age was observed, and cadaver was corrupted

The normal generation process of the fly is as follows.
(Generation process of the fly)
2 days after input: Egg laying 4 days after input: Occurrence of pupae
7 days after input: Occurrence of wrinkles (3 years old)

(Existence of mortuary shape collapse)
Evaluation was made by visually observing the outer shape of the mortuary after standing at room temperature of 25 ° C. and humidity of around 50% for 7 days. Note that the evaluation criteria were set in the same manner as in Example 1.

  In Example 3 above, the rodenticide composition (granules) was prepared in the same manner as in Example 3 except that the blending amount of fipronil was changed to 0.02% by weight (200 ppm) instead of 0.01% by weight (100 ppm). Prepared. Next, the rodenticide composition was evaluated for the effect of suppressing the occurrence of wrinkles and the presence or absence of mortality of the cadaver, except that the number of measurements (n) was n = 6. The results are shown in Table 2.

[Comparative Example 2]
In Example 3 above, a rodenticide composition (granules) was prepared in the same manner as in Example 3 except that fipronil was not blended. Then, the rodenticide composition was evaluated for the effect of suppressing the occurrence of wrinkles and the presence or absence of mortality of the cadaver, except that the number of measurements (n) was n = 3. The results are shown in Table 2.

  As is clear from Table 2, the rodenticide composition of Examples 3 and 4 suppresses the occurrence of wrinkles and delays the progression of decay of the death carcass compared to the rodenticide composition of Comparative Example 2 that does not contain fipronil. I can see that

  In Example 3 above, the rodenticide composition (granules) was prepared in the same manner as in Example 3 except that the amount of fipronil was changed to 0.03% by weight (300 ppm) instead of 0.01% by weight (100 ppm). Prepared.

  Then, the rats were fed with the rodenticide composition in the amounts shown in Table 3. At this time, the dose of the rodenticide composition was measured after the body weight of the rat was measured, and then administered so that the fipronil dose was 7.5 mg / kg of the rat (that is, 7.5 mg / kg). In addition, after confirming the complete eating of the rodenticide composition, about 20 g of granules containing 25 ppm of diphethialol were fed in order to quickly die the rat.

  Next, with the exception of changing the number of adult fly fly (30 male and female mixed) into the cage three times every 7 days, the effect of suppressing the occurrence of wrinkles and the presence or absence of the outer shape of the dead carcass were the same as in Example 3 above. evaluated. That is, first, carcasses of rats fed with the rodenticide composition and adult flies are placed in a cage in the same manner as in Example 3 above and allowed to stand for 7 days (the first addition of flies and the first week). Then, after newly placing adult fruit flies in the cage and leaving them for 7 days (flies added for the second time / second week), further new flies are placed in the cages and left for 7 days (flies added for the third time / third weeks). Then, except for visually observing the cadaver every time after standing for 7 days, the effect of suppressing the occurrence of sharks and the presence / absence of the outer shape of the cadaver were evaluated in the same manner as in Example 3 above. The results are shown in Table 3.

[Comparative Example 3]
Rats were killed by eating approximately 20 g of granules containing 25 ppm of diphetialol. Subsequently, except for setting the number of measurements (n) to n = 2, the effect of suppressing the occurrence of wrinkles and the presence / absence of mortality of the cadaver were evaluated in the same manner as in Example 5. The results are shown in Table 3.

  As can be seen from Table 3, the rodenticide composition of Example 5 suppresses the generation of wrinkles and delays the progress of decay of death carcasses than Comparative Example 3.

Claims (7)

Rodenticide composition which comprises a di fetish A roll, and emamectin benzoate. Further rodenticide composition according to claim 1 containing dietary components. The rodenticide composition according to claim 1 or 2 , wherein the emamectin benzoate is blended in a proportion of 0.001 to 10% by weight with respect to the total amount of the rodenticide composition. A method of delaying the progression of decay of a carcass of a harmful small animal, which comprises blending emamectin benzoate with a poisonous bait of the harmful small animal containing difetialol . A method of delaying the progression of decay of a carcass of a pest of small harmful animals, characterized in that a poisonous bait formulated with difetialol and emamectin benzoate is placed near the passage or nest of the pest of small harmful animals. 6. The method of claim 5 , wherein the poison bait is disposed in an amount effective to delay the progression of decay of the carcasses of the small harmful animals. The method according to claim 6 , wherein the effective amount for delaying the decay of the carcass of the harmful small animal is 3 mg or more per 1 kg of the harmful small animal.