JP5863322B2 - Pest control agent and pest control method using the same - Google Patents

Description

The present invention is pesticidal agents suitable for controlling harmful organisms (pest), and to a pest control method using the same.

  In general, ants, termites, cockroaches and the like can be mentioned as pests called house pests. Damage caused by these pests varies depending on the type of pest. For example, ants are known to easily invade human living environments, eat and eat human food, and bite. Furthermore, since ants have a symbiotic relationship with the aphid, an agricultural pest, it can be said that it is indirectly an agricultural pest. Termites are also known to damage the wood that constitutes houses and important cultural properties. In addition, cockroaches often live around the kitchen, which not only eats human food but also damages the wiring of home appliances.

  Many control agents for controlling these pests are on the market. Moreover, it is known that the control agent which contains the quaternary ammonium salt which has a predetermined structure as an active ingredient can control pests, such as a cockroach (refer patent document 1). Furthermore, a known solid bait containing a pest control component and an insecticidal component, and a method for controlling unpleasant pests such as gumworm, ants, and termites using this poison bait are known (see Patent Document 2).

JP 2007-308390 A JP 2010-285354 A

  However, commercially available control agents and poisonous baits described in Patent Document 2 contain various insecticidal components including pyrethroid compounds as active ingredients. For this reason, it is necessary to handle it strictly in consideration of safety so that it should not enter the human mouth. Further, the control agent described in Patent Document 1 has room for further improvement in terms of pest control effect and safety.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to control the effects of pests without blending insecticidal components used in known insecticides and the like ( An object of the present invention is to provide a pest control agent having a high insecticidal effect or repellent effect and excellent safety, and a pest control method using the same.

  The present inventors have intensively studied to achieve the above-mentioned problems. Surprisingly, sorbic acid, dehydroacetic acid, and their salts, which are generally used as preservatives for foodstuffs, have high control against pests ( It was found to show an effect (insecticide or repellent). And the present inventors came to complete this invention based on such knowledge.

That is, according to the present invention, it contains at least one compound of potassium sorbate and sodium dehydroacetate as an active ingredient against pests, and the pests are ants, termites, ticks, or gum bugs, The pest control agent used for killing and controlling the pests by the action of is provided.

In the present invention, the compound is preferably a sorbate potassium. Furthermore, the pesticidal composition of the present invention, it is not preferable is a bait that said compound is contained in the substrate an eating substances pests.

  Moreover, according to this invention, the pest control method including applying said pest control agent to the habitat of a pest is provided.

  The pest control agent of the present invention has a high pest control effect (insecticidal effect or repellent effect) without blending insecticidal components used in known insecticides and the like. For this reason, the pest control agent of the present invention has a high control effect, is easy to handle, and is excellent in safety.

Further, according to the method for controlling pests of the present invention, ants, termites, mite, and pests such as pill bugs can be effectively and safely control.

It is the graph which plotted the number of dead insects with respect to elapsed time (time) about Examples 1-3 and the comparative example 1. It is the graph which plotted the number of dead insects with respect to elapsed time (hour) about Examples 4-6 and Comparative Example 1. FIG.

  Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments. In this specification, the “control effect” means both “insecticidal effect” and “repellent effect”.

  The pest control agent of the present invention contains at least one compound selected from the group consisting of sorbic acid, dehydroacetic acid, and salts thereof. These compounds (hereinafter also simply referred to as “sorbic acid etc.”) are contained in pest control agents as active ingredients capable of controlling (insecticidal) pests. Sorbic acid or the like is conventionally known as a component added to foodstuffs as a preservative (or preservative). However, it has not been conventionally known that sorbic acid or the like has a pest control effect. The pest control agent of the present invention is one of the important features in that sorbic acid or the like has an effect of controlling pests, and sorbic acid or the like is contained as an active ingredient against pests.

  Since sorbic acid or the like is a component added to foodstuffs as a preservative, it is safer for human animals than general insecticidal components such as pyrethroid compounds. Further, these compounds have a high control effect against pests. For this reason, the pest control agent of the present invention containing sorbic acid or the like as an active ingredient against pests has a high pest control effect and excellent safety even if a conventional insecticidal component is not blended.

  As a compound contained as an active ingredient in the pest control agent of the present invention, among sorbic acid, dehydroacetic acid, and salts thereof, salts such as potassium sorbate and sodium dehydroacetate are preferable. Potassium sorbate and sodium dehydroacetate are highly water-soluble and easy to formulate and have the advantage of being easily taken into the body of pests to be controlled.

  What is necessary is just to set the compounding ratio of the said compound (sorbic acid etc.) suitably by the kind of formulation, an application method, time, a place, the generation | occurrence | production situation of a pest, etc. Specifically, the proportion of the compound contained in the pesticidal agent is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and 1 to 10% by mass. It is particularly preferred. When the content ratio of the compound is less than 0.1% by mass, the control effect tends to be insufficient. On the other hand, when the content ratio of the compound is more than 20% by mass, formulation tends to be difficult.

  The pest control agent of the present invention is preferably formulated using an appropriate adjuvant in consideration of the application method. As the types of preparations, for example, emulsion, suspension, wettable powder, aqueous solvent, liquid, flowable powder, wettable powder, powder, granule, pill, tablet, dust, aerosol, paste, Examples include gels, sheet preparations, oils, emulsions, microdispersions, baits. Any of the preparations exerts a pest control effect. Since sorbic acid and the like are expected to act as food poisons, bait agents are preferable among the above preparations.

  The shape (form) of the bait agent is not particularly limited. For example, a granular solid agent (granule agent), a tablet solid agent (tablet tablet), a rod-like solid agent, a granular material, a powder agent, a gel agent, a jelly agent, and a sol agent. , And can be formulated into an arbitrary shape such as a liquid agent.

  Specific examples of the auxiliary agent include a solid carrier, a solvent, a stabilizer, a colorant, and a surfactant. Although the mixture ratio of an adjuvant is not specifically limited, It is preferable that it is 0.1-99.9 mass% in a pest control agent, and it is more preferable that it is 0.1-50 mass%. When the blending ratio of the auxiliary agent is less than 0.1% by mass, it tends to be difficult to formulate. On the other hand, when the blending ratio of the auxiliary agent exceeds 99.9% by mass, the control effect tends to be insufficient.

  When the pest control agent of the present invention is used as a bait agent, it is preferable to use a pest feeding substance as a base material for containing an active ingredient. Specific examples of such food intake substances include proteins, carbohydrates, lipids and the like.

  Specific examples of proteins include animal proteins such as actin, albumin, casein, fibrin, fibrinogen, keratin, globulin (α, β, γ), hemoglobin, myosin; edestin, zein, gliadin, allatin, zein, gluten, etc. A vegetable protein etc. can be mentioned. Fish solubles, locusts, grasshoppers, mantis, crickets, bees, aphids, cockroaches, butterflies, moths, flies, fish, krill, shrimp, milk, cheese, feed yeast, livestock meat, flour, rice flour, bran, soybeans, Solids or liquids obtained from cotton seeds, rapeseed, sesame seeds, persimmons, mackerel, onions, bananas, peanuts, pumpkin seeds, broad beans, etc. can also be used.

  Specific examples of carbohydrates include starch powder, fruit juice, honey, molasses, sugar cane, palatinose, trehalose, sophorose, turanorose, laminaribiose, nigerose, selbioose, xylobys, leucorose, gentiobiose, melbee, lutinose, primberose, vicianose, robinose N-acetylglucosamine, galacturonic acid, mannose, xylose, glucuronic acid, sucrose, glucose, fructose, lactose, brown sugar, red sugar, tri-warm sugar, maltose, arabinose, galactose, sorbitol, glycerin, etc. .

  Specific examples of lipids include vegetable oils such as tree wax, coconut oil, cacao oil, castor oil, olive oil, peanut oil, linseed oil, tung oil, hemp seed oil, eno oil; mammal oil, butter fat, leg Examples thereof include animal oils such as fat, whale oil, dolphin oil, sardine oil, herring oil, cod liver oil, shark liver oil, squid oil, clam oil, egg oil, and fats and oils produced by yeasts and bacteria.

  Although the mixing | blending ratio of an ingesting substance is not specifically limited, It is preferable that it is 50-99.9 mass% in a pesticidal agent, and it is more preferable that it is 60-80 mass%. When the content of the ingested substance is less than 50% by mass, the eating property of the pest tends to be lowered. On the other hand, when the content ratio of the feeding substance is more than 99.9% by mass, the control effect tends to be insufficient.

  A bulking agent may be added to the pest control agent of the present invention to facilitate the preparation. Specific examples of the bulking agent include purified water, titanium oxide, calcium carbonate, white carbon, diatomaceous earth, crystalline cellulose, clay, kaolin, talc, bentonite, zeolite, sepiolite, attapulgite, and alumina. In addition, the blending ratio of the extender is not particularly limited, but is preferably 50 to 99.9% by mass in the pest control agent.

  Moreover, you may add additives, such as antioxidant, a preservative, an accidental eating prevention agent, an emulsifier, and an attracting component, to the pest control agent of this invention as needed.

  Specific examples of the antioxidant include erythorbic acid, sodium erythorbate, dibutylhydroxytoluene, dl-α-tocopherol, nordihydroguaiaretic acid, butylhydroxyanisole, methylhydroxyanisole, propyl gallate, guaiac fat, L- Examples include cysteine hydrochloride. Specific examples of preservatives include benzoic acid, sodium benzoate, diphenyl salicylate, salicylic acid, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, calcium propionate , Sodium propionate, boric acid and the like.

  Specific examples of the anti-fouling agent include: denatonium benzoate, cetylated sucrose, pepper powder, amaranth, amaranth aluminum lake, erythrosin, erythrosin aluminum lake, new coccin, phloxine, rose bengal, acid red, tartrange, tartrandialuminum Rake, sunset yellow FCF, indigo carmine, copper chlorophyll, etc. can be mentioned. Specific examples of the emulsifier include polyoxyethylene alkyl allyl ether, polyoxyethylene alkyl ether, alkyl benzene sulfonic acid metal salt, alkyl benzene sulfonic acid amine salt and the like. Specific examples of the attracting component include cheese flavor, butter flavor, peanut flavor, peach flavor, strawberry flavor, and milk flavor. In addition, although the mixture ratio of these additives is not specifically limited, It is preferable that it is 0.001-20 mass% in a pest control agent.

  The pest control agent of the present invention is high by containing sorbic acid or the like conventionally used as a preservative for foodstuffs as an active ingredient (control ingredient) against pests, even without containing an insecticidal ingredient. Both safety and pest control effects are achieved. For this reason, it is preferable that the pest control agent of the present invention does not substantially contain an active ingredient (control ingredient) against pests other than sorbic acid, dehydroacetic acid, and salts thereof. As a result, both the safety and the excellent control effect against pests are effectively exhibited. In addition, "the active ingredient with respect to pests other than sorbic acid, dehydroacetic acid, and these salts (control component)" means the general insecticidal component (insecticide) contained in the conventional pest control agent. In addition, the case of “substantially not containing” includes the case where it is contained in a very small amount within a range that does not affect the safety of the pest control agent.

  When the pest control agent of the present invention is used, for example, ants such as Himeari, Himeari, Kuroyamaari, Amimeari, Argentine ant, and white-winged termites; Ticks such as red mites, spider mites, red mites It is possible to effectively control larvae such as scallops, bark beetles, slugs, locusts, geese, flies and the like. Among these, the pest control agent of the present invention has a high control effect on ants, termites, cockroaches, ticks, and rubber bugs, and has a particularly high control effect on ants.

  The pest control agent of the present invention exerts its control effect particularly effectively by feeding pests to be controlled. In addition to controlling by feeding, repellent effects and secondary effects in which individuals killed by feeding or the like affect other individuals are also expected.

  The pest control method of the present invention is a control method including applying the above-mentioned pest control agent to a pest habitat. The application method of the pest control agent is not particularly limited. For example, if it is a liquid agent such as a wettable powder, the pest can be controlled by spraying directly on the pest. Moreover, if it is solid agents, such as a bait agent, a pest can be controlled by arrange | positioning in the habitat of a pest, a damage location, etc.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. In the examples and comparative examples, “parts” and “%” are based on mass unless otherwise specified.

(1) Diet test-1
Example 1
A potassium sorbate solution (potassium sorbate concentration: 1%) was prepared by dissolving potassium sorbate in a 10% sucrose aqueous solution. The cotton soaked with the prepared potassium sorbate solution was placed on the center of a petri dish laid with a filter paper having a diameter of 9 cm (manufactured by Advantech, No. 2) via an aluminum foil. Next, 30 test insects (ie, Hihimeri) were introduced into the petri dish to conduct a diet test. 1, 2, 3, 6, and 24 hours after the test insect was introduced, the state of the test insect was observed and evaluated by dividing into “sound”, “falling”, and “lethal”. The evaluation results are shown in Table 1.

(Examples 2 and 3)
A potassium sorbate solution was prepared in the same manner as in Example 1 except that the potassium sorbate concentration was 2% and 5%. Thereafter, a diet test was conducted in the same manner as in Example 1 described above. The evaluation results are shown in Table 1.

(Examples 4 to 6)
Sodium dehydroacetate solutions having a sodium dehydroacetate concentration of 1%, 2%, and 5% were prepared in the same manner as in Example 1 except that sodium dehydroacetate was used instead of potassium sorbate. Thereafter, a diet test was conducted in the same manner as in Example 1 described above. The evaluation results are shown in Table 1.

(Comparative Example 1)
A diet test was conducted in the same manner as in Example 1 except that cotton soaked with only a 10% sucrose aqueous solution was used. The evaluation results are shown in Table 1. Moreover, about Examples 1-3 and the comparative example 1, the graph which plotted the number of dead insects with respect to elapsed time (time) is shown in FIG. Furthermore, about Examples 4-6 and the comparative example 1, the graph which plotted the number of dead insects with respect to elapsed time (time) is shown in FIG.

  As is clear from the results shown in Table 1, FIG. 1 and FIG. 2, the lethality was 100% at a concentration of 5% for both potassium sorbate and sodium dehydroacetate. For this reason, any active ingredient (compound) is expected to have a toxic effect. When 6 hours passed, the mortality rate was 50% or less for all compounds. This suggests that all compounds are slow acting.

(2) Contact test ( Reference Example 7)
Potassium sorbate was dissolved in water to prepare a 5% potassium sorbate aqueous solution. 1 mL of the prepared potassium sorbate aqueous solution was uniformly applied to a filter paper having a diameter of 9 cm and sufficiently dried (amount of AI (active ingredient) per filter paper: 50 mg). This filter paper was laid on a petri dish, and cotton soaked with water through an aluminum foil was placed in the center of the filter paper. Next, 30 test insects (ie, Hihimeri) were introduced into the petri dish to perform a contact test. 1, 2, 3, 6, and 24 hours after the test insect was introduced, the state of the test insect was observed and evaluated by dividing into “sound”, “falling”, and “lethal”. The evaluation results are shown in Table 2.

( Reference Example 8)
A 5% sodium dehydroacetate aqueous solution was prepared in the same manner as in Reference Example 7 except that sodium dehydroacetate was used instead of potassium sorbate, and a contact test was performed. The evaluation results are shown in Table 2.

(Comparative Example 2)
A contact test was conducted in the same manner as in Reference Example 7 except that 5% potassium sorbate aqueous solution was not applied to the filter paper. The evaluation results are shown in Table 2.

  As is apparent from the results shown in Table 2, when either potassium sorbate or sodium dehydroacetate was used, the number of individuals who fell was large, but the number of individuals who died was smaller than that during the diet test.

(3) Repellent test ( Reference Example 9)
Potassium sorbate was dissolved in water to prepare a 5% potassium sorbate aqueous solution. 1 mL of the prepared aqueous potassium sorbate solution was uniformly applied to a section obtained by dividing a filter paper having a diameter of 9 cm into two parts and sufficiently dried (AI (active ingredient) amount per section: 50 mg). This slice and an untreated slice were laid on a petri dish, and cotton soaked with water via an aluminum foil was placed in the center. Next, 30 test insects (Yehimeari) were placed in the petri dish to conduct a repellent test. 24 hours after the test insect was introduced, the section on which the test insect was present was counted. The results are shown in Table 3.

( Reference Example 10)
A 5% sodium dehydroacetate aqueous solution was prepared in the same manner as in Reference Example 9 except that sodium dehydroacetate was used instead of potassium sorbate, and a repellent test was performed. The results are shown in Table 3.

(Comparative Example 3)
A repelling test was performed in the same manner as in Reference Example 9 except that 5% potassium sorbate aqueous solution was not applied to the slices. The results are shown in Table 3.

  From the results shown in Table 3, it is clear that both potassium sorbate and sodium dehydroacetate have an effective repellent effect.

(4) Secondary effect test ( Reference Example 11)
Potassium sorbate was dissolved in water to prepare a 5% potassium sorbate aqueous solution. The prepared potassium sorbate aqueous solution was sprayed on 5 test insects (ie, Hihimeri) to die.
A filter paper having a diameter of 9 cm was laid on the petri dish, and 30 test insects (Yehimeari) and 5 dead test insects (Yehimeari) were put into the petri dish to conduct a secondary effect test. The state of 30 test insects was observed 24 and 48 hours after introduction of the test insects, and evaluated by dividing into “sound”, “falling”, and “lethal”. The evaluation results are shown in Table 4.

( Reference Example 12)
A 5% sodium dehydroacetate aqueous solution was prepared in the same manner as in Reference Example 11 except that sodium dehydroacetate was used instead of potassium sorbate, and a secondary effect test was performed. The evaluation results are shown in Table 4.

  From the results shown in Table 4, it is clear that both potassium sorbate and sodium dehydroacetate have an effective secondary effect.

(5) Diet test-2
(Example 13)
1 mL of 0.1% sodium dehydroacetate aqueous solution was added dropwise to a filter paper (No. 2 manufactured by Advantech Co., Ltd.) having a diameter of 9 cm. This filter paper was spread on a glass petri dish having a diameter of 9 cm. In this petri dish, 50 termite ants and 5 soldier ants were placed and a diet test was conducted. 1, 3, 5, 8, 24, and 48 hours after the introduction of the termites, the state of the craft ants was observed, and the evaluation was divided into “sound”, “paralysis”, “convulsions”, and “lethal”. The evaluation results are shown in Table 5. Further, “reaction rate (%)” and “lethal rate (%)” were calculated according to the following formula. The calculated results are shown in Table 6.
Reaction rate (%)
= {(Healthy x 0 + convulsions x 0.3 + paralysis x 0.7 + lethality x 1.0) / 50} x 100
Lethality rate (%) = (Death / 50) x 100

(Examples 14 to 16)
A diet test was performed in the same manner as in Example 13 except that 0.3%, 0.5%, and 1% aqueous sodium dehydroacetate were used. The evaluation results are shown in Table 5. Table 6 shows the calculated “response rate (%)” and “lethal rate (%)”.

(Comparative Example 4)
A diet test was conducted in the same manner as in Example 13 except that water not containing sodium dehydroacetate was added dropwise. The evaluation results are shown in Table 5. Table 6 shows the calculated “response rate (%)” and “lethal rate (%)”.

  From the results shown in Tables 5 and 6, it is clear that a particularly effective food poisoning effect is exhibited when the concentration of sodium dehydroacetate is 0.3% or more. In addition, when the density | concentration of sodium dehydroacetate was 0 to 0.3%, the feeding damage of the filter paper was confirmed. Further, when the concentration of sodium dehydroacetate was 0.5%, the filter paper was slightly damaged, and when it was 1%, no significant damage was confirmed.

(6) Diet test-3
(Example 17)
A test feed was obtained by adding an aqueous sodium dehydroacetate solution to a powder feed for animal experiments (trade name “Sample MF for experimental animals”, manufactured by Oriental Yeast Co., Ltd.) to a concentration of 0.5% and stirring well. . 3 g of the obtained test feed was placed in a glass petri dish having a diameter of 9 cm. Into this petri dish, 0.5 g (corresponding to about 2500 leopard mites) of pre-cultured Kona Leopard mite was added and spread to the whole for a food test. Three days later, 0.5 g of the contents of the petri dish was taken out and observed with an optical microscope (× 30) to measure the healthy number of individuals, and the mortality rate (%) was calculated. The results are shown in Table 7.

(Examples 18 to 21)
A diet test was carried out in the same manner as in Example 17 except that a test feed obtained by adding an aqueous sodium dehydroacetate solution to a concentration of 1%, 3%, 5%, and 10% was used. It was. The results are shown in Table 7.

(Comparative Example 5)
A diet test was conducted in the same manner as in Example 17 except that a test feed to which no sodium dehydroacetate aqueous solution was added was used. The results are shown in Table 7.

  From the results shown in Table 7, it is clear that an effective food poisoning effect is exhibited when the concentration of sodium sorbate is 0.5% or more.

(7) Diet test-4
(Example 22)
0.1 g of granular reagent containing sodium dehydroacetate at a concentration of 0.1% was placed in a 250 mL tapper. In this tapper, 20 white whale ants were placed and a diet test was conducted. 1, 2, 3, 4, 6, 8, and 24 hours after the introduction, the state of the white whale was observed and evaluated by dividing into “sound”, “falling”, and “lethal”. The evaluation results are shown in Table 8.

(Examples 23 to 25)
A diet test was conducted in the same manner as in Example 22 except that a reagent containing sodium dehydroacetate at concentrations of 0.3%, 0.5%, and 1% was used. The evaluation results are shown in Table 8.

(Comparative Example 6)
A diet test was conducted in the same manner as in Example 22 except that a reagent containing no sodium dehydroacetate was used. The evaluation results are shown in Table 8.

  From the results shown in Table 8, it is clear that even if the concentration of sodium dehydroacetate is as low as 1% or less, an effective food poisoning effect is exhibited.

Pest control agent of the present invention is suitable ants, termites, mite, as agents for controlling pests such as pill bugs.

Claims (4)

Containing at least one compound of potassium sorbate and sodium dehydroacetate as an active ingredient against pests ,
The pest is an ant, a termite, a tick, or a dandelion;
A pest control agent used to kill and control the pests by acting as a food poison . Wherein the compound is a pesticide according to claim 1, wherein the sorbic acid potassium. The pest control agent according to claim 1 or 2, which is a bait agent in which the compound is contained in a base material that is a feeding substance of the pest. A pest control method comprising applying the pest control agent according to any one of claims 1 to 3 to a pest habitat.

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