JP5989915B2 - 粉 Pest control powder - Google Patents

Description

  The present invention relates to a powder for controlling against insect pests outdoors or indoors. More specifically, the present invention relates to a pest control powder that uses a phenoxybenzyl ester compound having no cyano group at the α-position and has a simple structure but exhibits a control effect equal to or higher than that of the prior art.

  2. Description of the Related Art Conventionally, control agents for controlling pests outdoors or indoors have been used, and higher control performance is always required for these control agents.

A pyrethroid compound is generally used as a control component of such a pest control powder.
Here, the pyrethroid compound is an acid ester of various acid components and alcohol components. However, depending on whether the α-position of the acid component in the structure or the α-position of the alcohol component has a cyano group, type I ( Those having no cyano group) and those having type II (having a cyano group).

  The present applicant has already disclosed various powders for controlling pests. Specifically, Patent Document 1 discloses a powder for controlling insect pests in which a solvent such as cyfluthrin and dipropylene glycol is supported on a mineral carrier. In addition, Patent Document 2 discloses a powder for controlling insect pests that exerts a dramatic control effect by using cyfluthrin and cinnamon powder in combination. Further, Patent Document 3 discloses a pest control powder that exhibits a control effect over a long period of time by allowing a mineral carrier to carry a solvent such as cyfluthrin and an aliphatic hydrocarbon solvent at a specific ratio. ing.

  However, these pest control powders use a type II pyrethroid compound (cyfluthrin) having a cyano group in the structure as a control component.

Japanese Patent No. 4424944 Japanese Patent No. 4813870 JP 2012-232964 A Japanese Patent No. 4278654 Japanese Patent No. 4356006

  On the other hand, for type I pyrethroid compounds having no cyano group in the structure, for example, Patent Documents 4 and 5 disclose powders for controlling insect pests using such pyrethroid compounds.

  However, these pest control powders use a pyrethroid compound having no cyano group in the structure as a control component, but have the following problems. First, since the pest control agent described in Patent Document 4 is a control agent characterized by improving the contact efficiency between the pest and the insecticide or scooping the isopoda from the bottom of the stone, A behavioral disruptor such as winter green oil for exhibiting such an effect must be blended as an essential component (see [Claim 1] and [0003] of Patent Document 4). Moreover, since the pest control agent described in Patent Document 5 has a complicated structure in which a granular external solid agent is attached to the surface of a spherical internal solid agent, the manufacturing process becomes complicated, There is a problem that the cost becomes high.

  This time, the present inventors have used polyalkylene glycols and sorbitan fatty acid esters to use phenoxybenzyl ester compounds (particularly phenothrin and permethrin) among type I pyrethroid compounds having no cyano group in the structure. The knowledge that a pest control powder can be produced was obtained. Further, the present inventors have found that such powder for controlling insect pests exhibits an extremely high control effect without requiring a complicated structure and other essential components as before.

  That is, the present invention has been made in view of the above-described conventional problems, and uses a phenoxybenzyl ester compound having no cyano group at the α-position, and has a simple structure, but has the same control effect as the conventional one. The purpose of the present invention is to provide a dusting agent for controlling pests.

To achieve the above object, crawling pest control powder for the present invention, a phenothrin is no phenoxybenzyl ester compound cyano group at α-position, and a polypropylene glycol having a weight average molecular weight of 200, mineral a powder for creeping pest control comprising supported on a carrier, and 0.3 to 2.0 wt% amount of phenothrin is against dusts, the amount of polypropylene glycol is 1.0 with respect to powders 4.0 percent by weight, the amount of polypropylene glycol, characterized in that it is a 0.5 to 13 times the amount of phenothrin.

  The powder for controlling pests according to the present invention is characterized by using polyalkylene glycol having a weight average molecular weight of 100 to 500.

  The powder for controlling pests according to the present invention is characterized in that the polyalkylene glycol is polypropylene glycol.

  Next, each component which comprises the dust for insect pest control which concerns on this invention is demonstrated.

(Phenoxybenzyl ester compound)
First, the phenoxybenzyl ester compound used in the present invention is a type I pyrethroid compound having no cyano group at the α-position, and specifically includes phenothrin, permethrin, and various isomers thereof. Among these, since a higher control effect is obtained, it is preferable to use one or two compounds selected from phenothrin and permethrin, and among them, it is preferable to use phenothrin.

The amount of the phenoxybenzyl ester compound is appropriately determined according to the environment used, the insect pests to be controlled, and the like, but is 0.1 to 3.0 with respect to the powder for controlling insect pests according to the present invention. It is preferable to set it as weight%, and it is more preferable to set it as 0.3-2.0 weight%. If the blending amount is less than 0.1, the control performance may not be sufficiently improved. If it exceeds 3.0% by weight, the benefits of improving the control performance cannot be expected. There is a risk of becoming larger.
In addition, from the relationship of the blending ratio with polyalkylene glycol and sorbitan fatty acid ester described later, when the amount exceeds 3.0% by weight, the blending amount of these solvents with respect to the phenoxybenzyl ester compound also increases, and the powder form It may be difficult to mold.

(Polyalkylene glycol and / or sorbitan fatty acid ester)
Next, the powder for controlling pests of the present invention is characterized in that the above-described phenoxybenzyl ester compound is held on a carrier using polyalkylene glycol and / or sorbitan fatty acid ester as a solvent. In this way, if polyalkylene glycol or sorbitan fatty acid ester is not used among various solvents, it has the characteristic of exhibiting the same control effect as before while using type I phenoxybenzyl ester compound having no cyano group in the structure. Therefore, the powder for controlling pests of the present invention cannot be produced.

(Polyalkylene glycol)
Here, the polyalkylene glycol is represented by the structural formula of HO (RCHCH ₂ O) _n H (R is a hydrogen atom or a hydrocarbon having 1 to 3 carbon atoms), specifically, diethylene glycol, triethylene. Examples include glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, polypropylene glycol, polybutylene glycol, and glycerin. In addition, if a polyalkylene glycol having a molecular weight that is too high is used, there is a risk that the control component will be difficult to adhere to the pest when the pest comes into contact with the pest control powder. It is preferable to use 100 to 500 polypropylene glycol or polybutylene glycol, and among them, it is preferable to use polypropylene glycol having a weight average molecular weight of 200.

(Sorbitan fatty acid ester)
Specific examples of sorbitan fatty acid esters include sorbitan monolaurate, sorbitan monooleate, sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan tristearate, sorbitan trisoleate, sorbitan sesquioleate Etc. In addition, sorbitan fatty acid esters, like polyalkylene glycols, may be difficult to attach to pests when the pests come into contact with pest control powders, if they are too high in molecular weight. Of these, sorbitan monooleate is preferably used.

  In the present invention, lauric acid diethanolamide can be used instead of polyalkylene glycol and sorbitan fatty acid ester.

(Blending amount of polyalkylene glycol and / or sorbitan fatty acid ester, blending ratio with respect to phenoxybenzyl ester compound)
The blending amount of the polyalkylene glycol or sorbitan fatty acid ester is appropriately determined depending on the environment to be used and the pests to be controlled, but is 0.5 to the pest control powder according to the present invention. It is preferable to set it as 5.0 weight%, and it is preferable to set it as 1.0 to 4.0 weight%. If the blending amount is less than 0.5, the control effect may not be sufficiently improved, and if it exceeds 5.0% by weight, it may not be possible to prepare a powder. is there.

  Further, regarding the blending amount of polyalkylene glycol and sorbitan fatty acid ester, in addition to the blending amount described above, the blending amount (blending ratio) of polyalkylene glycol and / or sorbitan fatty acid ester is 0. 0 of the blending amount of phenoxybenzyl ester compound. The amount is preferably 5 to 13 times, and more preferably 3 to 6 times. When the blending ratio is less than 0.5 times or more than 13 times, when a solid phenoxybenzyl ester compound is used, the phenoxybenzyl ester compound does not dissolve, This is because the control component may not be uniformly supported or may be difficult to prepare in powder form.

  The viscosity of the polyalkylene glycol is not particularly limited and can be appropriately set according to the pest to be controlled, but if it has a too high or low viscosity, it is molded into a powder form. It may be difficult to do, or when the insect pests come into contact with the powder for controlling insect pests, it may be difficult for the control ingredients to adhere to the insect pests, so that it may be 5 to 100 mPa · s at 25 ° C. preferable.

(Mineral material carrier)
Examples of the mineral carrier used in the present invention include kaolin, clay, talc, bentonite, zeolite, dikelite, and carplex.

  In addition to the above-described constituent requirements, pyrethroid compounds such as allethrin, praretrin, phthalthrin, etofenprox, organophosphorus agents such as fenitrothion, diazinon, and propaphos, carbamate agents such as propoxl and methoxydiazone, and silafluophene as necessary. Organosilicon insecticides such as, insecticides such as cartap and buprofezin, acaricides, fungicides, adult insect disruptors, other active ingredients, various surfactants, dispersants, fluidity improvers such as PAP, Insecticide stabilizers, auxiliary solvents and the like can be added. Further, various powders such as cinnamon powder and lemon grass powder can be added.

  A known method can be used as a method for producing the powder for controlling pests of the present invention. For example, a polyalkylene glycol or sorbitan fatty acid ester is mixed with the phenoxybenzyl ester compound used in the present invention to form a solution. First, the solution is mixed with about half of the mineral carrier, and then the remaining mineral carrier is mixed. The method of manufacturing by mix | blending etc. is mentioned.

The powders for crawling pest control of the present invention thus obtained is excellent in indoor or outdoor, 1 m ² per 1 to 100 g, more preferably various insect pests by 5~50g spraying, uncomfortable pests or agricultural pests Demonstrate the control effect. Sanitary pests include cockroaches, fleas, house dust mites, indoor dust mites, various ticks, bed bugs, ticks, etc., and unpleasant pests include gum worms, bark beetles, centipedes, millipedes, beetles, gejigeji, ants Examples of agricultural pests such as hornworms, leafhoppers, planthoppers, leafhoppers, stink bugs, and the like.

  According to the powder for controlling insect pests according to the present invention, a powder for controlling insect pests having an excellent control effect is obtained using a phenoxybenzyl ester compound (particularly phenothrin, permethrin) having no cyano group among pyrethroid compounds. Can do. Moreover, the dust agent for insect pest control which has this effect with a simple structure can be obtained.

  Moreover, according to the powder for controlling pests according to the present invention, a powder for controlling pests with a more excellent control effect can be obtained by setting the blending amounts and blending ratios of the respective components within a specific range.

  Furthermore, according to the powder for controlling pests according to the present invention, a powder for controlling pests with a more excellent control effect can be obtained by using a specific one for polyalkylene glycol or sorbitan fatty acid ester.

  Next, based on an Example and a comparative example, the powder for insect pest control of this invention is demonstrated still in detail. In addition, the Example described below is only an example which actualized this invention, and does not limit the technical scope of this invention.

Example 1
A mixed solution in which 0.05% by weight of permethrin was dissolved in 0.25% by weight of polypropylene glycol having a weight average molecular weight of 200 and 99.7% by weight of kaolin were sufficiently mixed, and then pulverized and mixed with a hammer mill. The powder for controlling pests of Example 1 was obtained.

(Examples 2 to 28)
Except having changed the compound to be used and the compounding quantity as having described in Table 1, it obtained the powder for insect pest control of Examples 2-28 like Example 1. FIG.

(Comparative Examples 1-5)
Except having changed the compound to be used and the compounding quantity as having described in Table 1, it carried out similarly to Example 1, and obtained the dust agent for insect pest control of Comparative Examples 1-5.

(Solubility evaluation)
In preparing the examples and comparative examples, as described in [0026], the phenoxybenzyl ester compound was dissolved in polyalkylene glycol, or after mixing with a control component when sorbitan fatty acid ester was used. If it is not in the form of a solution, the control substance cannot be uniformly supported on the mineral carrier, so the solubility of the polyalkylene glycol or sorbitan fatty acid ester used and the phenoxybenzyl ester compound is visually confirmed. A mixed solution was prepared.
As a result, the examples were evaluated as o (dissolved without problems), but the comparative example 2 using glycerin required a long time for dissolution, resulting in x evaluation (insufficient dissolution).

(Control performance test)
Next, the control performance of the powders for controlling pests of Examples and Comparative Examples was evaluated. The control performance was evaluated from the KT ₅₀ value obtained by the following test method and the removal rate.
1) 0.5 g of powder for controlling insect pests of Examples or comparative examples was uniformly applied on a filter paper having a diameter of 15 cm.
2) A plastic ring (diameter 12 cm, height 8 cm) with a thin buttered inner wall was installed on the filter paper of 1) to prevent escape.
3) A cockroach was released in the ring, and the number of knock-down insects with the passage of time was counted to obtain a KT ₅₀ value.
4) After 60 minutes of contact, German cockroaches in the ring were transferred to another container and given 3% sugar water, and the extermination rate (lethal rate) was determined from the number of dead insects 72 hours later. The results are shown in Table 1.

In addition, for the powders for controlling pests of Examples 3, 6, 7, 11, 12, and 18 and the powder for controlling pests of Comparative Example 1, the tick control performance was also evaluated by the following method.
1) Examples 3, 6, 7, 11, 12, 18 or 0.5 g of a pest control powder of Comparative Example 1 was uniformly applied onto a filter paper having a diameter of 15 cm.
2) A plastic ring (diameter 3 cm, height 1 cm) with a thin talc coating on the inner wall was installed on the filter paper 1) to prevent escape.
3) A spider mite was released in the ring, the number of knockdown insects with the passage of time was counted, and a KT ₅₀ value was obtained.
4) After contact for 10 minutes, the spider mite in the ring was transferred to another container, and the extermination rate (lethal rate) was determined from the number of dead insects after 24 hours. The results are shown in Table 1.

As a result, the pest control powders of Examples 1 to 28 satisfying the constituent requirements of the present invention exhibit higher control performance than the pest control powders of Comparative Examples 1 to 5 that do not satisfy the constituent requirements. I understood. In other words, by using an alkylene glycol or sorbitan fatty acid ester for the first time without using a complex structure or other essential components as before, while using a phenoxybenzyl ester compound having no cyano group in the structure, It was found that a powder for controlling insect pests exhibiting the same control effect as in Example 1 can be produced.
On the other hand, since the powder for controlling insect pests of the comparative example did not have the constituent requirements of the present invention, the control performance was lower than the powder for controlling insect pests of the examples. From the above results, the usefulness of the present invention was confirmed.

  The powder for controlling pests according to the present invention can be used for controlling and controlling pests outdoors or indoors.

Claims (1)

phenothrin, which is a phenoxybenzyl ester compound having no cyano group at the α-position;
A polypropylene glycol having a weight average molecular weight of 200,
It is a powder for controlling insect pests carried on a mineral carrier,
The amount of phenothrin is 0.3 to 2.0% by weight based on the powder,
The amount of polypropylene glycol is 1.0 to 4.0 wt% with respect to dust,
Amount of the polypropylene glycol,
A powder for controlling pests, which is 0.5 to 13 times the amount of phenothrin.