JPH09268108A - Solid insecticide composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a solid insecticide composition having high insecticidal effect even with a low dose of acephate, along with residual effect. SOLUTION: This solid insecticide composition comprises (a) O,S-dimethyl-N- acetylphosphoroamidothioate as insecticidally active ingredient, (b) a nonionic surfactant and/or anionic surfactant, and (c) a solid support >=80 in whiteness degree. The amount of the component (c) to be used is such as to be 40-65mN/m in the surface tension of the aqueous solution of the composition prepared by diluting it with water by a factor of 1000.

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to a use form in which O, S-dimethyl-N-acetylphosphoramidothioate (hereinafter referred to as “acephate”) is contained as an insecticidal active ingredient, and diluted with water and sprayed. It relates to a solid insecticide composition. More specifically, the present invention relates to a solid insecticide composition which exhibits a high insecticidal effect even when a low-dose acephate is used, and has excellent residual effect.

[0002]

2. Description of the Related Art Many techniques have been developed so far for the purpose of stabilizing acephate in a preparation. Examples thereof include a method of adding boron oxide into a solid preparation (JP-A-7-2608), a method of adding aluminum oxide (JP-A-7-2609), and a method of adding synthetic aluminum silicate (special Kaihei 7-2610),
Method of adding synthetic calcium silicate (JP-A-7-261)
No. 1), a method of adding a baked product of synthetic silicic acid (JP-A-7-2612), a method of adding condensed sodium phosphate (JP-A-7-173001), acephate, lactose, and a surfactant. , HL as a surfactant
Water-soluble granules using a nonionic surfactant in which B is 9 to 12 (JP-A-6-92803) and polyoxyethylene styrenated phenyl ether sulfate ester salt are blended in a wettable powder to make it suspending. (JP-A-63-54301), and a method of blending a nonionic surfactant and a polyoxyalkylene alkyl phenyl ether acetate ester sulfonate to improve the physical properties of the wettable granules ( Japanese Patent Publication No. 62-53482).

However, these conventional techniques are not sufficiently satisfactory in terms of insecticidal effect and residual effect of acephate.

Insecticides such as acephate can enhance the insecticidal effect and residual effect by spraying a large amount of the active ingredient per unit area for sufficient pest control. However, if a large amount of the active ingredient is sprayed, it is not preferable in terms of environment and economy, and phytotoxicity is likely to occur on the target crop. In addition, currently, there is a strong demand for reducing the amount of agricultural chemicals used in the environment.

[0005]

The object of the present invention is to solve the above-mentioned problems and to provide a solid insecticide composition having a high residual insecticidal effect even when a low dose of acephate is used, and having a residual effect. To provide.

[0006]

Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the above problems. As a result, by using a solid insecticidal formulation having the composition and properties shown below,
It was found that even if the amount of acephate sprayed was reduced, a sufficient insecticidal effect was obtained and the residual effect was prolonged.

Therefore, the gist of the present invention is, firstly, a solid insecticidal preparation comprising the following (a) to (c), which is obtained by diluting the solid insecticidal preparation 1000 times with water. The solid insecticide composition is characterized in that the surfactant of the above (b) is added so that the surface tension of the drug solution is in the range of 40 to 65 mN / m. (A) As an insecticidal active ingredient, O, S-dimethyl-N-acetylphosphoramidothioate (b) Nonionic surfactant and / or anionic surfactant (c) Whiteness is 80 or more Solid carrier

Secondly, it has the above composition,
In particular, the present invention relates to a solid pesticide composition characterized by having a whiteness of 65 or more.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the solid insecticidal composition of the present invention will be specifically described.

The chemical structural formula of acephate (O, S-dimethyl-N-acetylphosphoramidothioate) which is the insecticidal active ingredient of the present invention is shown below.

[0011]

Embedded image

The content of acephate in the solid insecticide composition of the present invention is not particularly limited, but is 5 to 95% by weight, preferably 30 to 75% by weight, based on the total composition of the solid insecticide. %.

Examples of the solid carrier to be added to the composition of the present invention include an inorganic substance containing at least one of an oxide, a silicate and a carbonate as a main component, a water-soluble inorganic salt or a water-soluble organic substance.

As a carrier for an inorganic material containing an oxide, a silicate or a carbonate as a main component, either synthetic or mineral origin can be used.

Examples of the synthetic ones include water-containing amorphous silicon dioxide commonly referred to as white carbon or silica, particulate anhydrous silica, particulate aluminum oxide, particulate titanium oxide and precipitated calcium carbonate, but particularly preferred. Is hydrated amorphous silicon dioxide, particulate titanium oxide, and precipitated calcium carbonate.

Mineral substances originate from diatomaceous earth,
Examples include silica sand, silica stone, talc, pyrophyllite, kaolinite, sericite, attapulgite, zeolite, halloysite, montmorillonite, zeikulite, activated clay, acid clay, limestone, chalk, calcite, dolomite and perlite. Preference is given to diatomaceous earth, silica, kaolinite, sieglite and perlite.

The water-soluble inorganic salt or water-soluble organic substance may have a solubility in water at 20 ° C. of 10% or more.

As the water-soluble inorganic salt, sodium sulfate,
Ammonium sulfate, sodium carbonate, sodium hydrogen carbonate, sodium chloride, potassium chloride, calcium chloride and the like can be mentioned, but particularly preferably sodium sulfate,
Ammonium sulfate.

As the water-soluble organic matter, glucose, fructose,
Examples thereof include sugars such as sucrose and lactose, urea, citric acid, sodium citrate, potassium citrate, malic acid, sodium malate and dextrin. Particularly preferred are sucrose, lactose and urea.

As these carriers, those commonly used can be used, but in the case of carriers of the same kind derived from minerals, the whiteness of them varies depending on the place of origin, composition, impurities, grinding conditions and the like. In addition, synthetic inorganic carrier, water-soluble inorganic salt,
Also in the case of water-soluble organic substances, the whiteness varies depending on the manufacturing method, purification method, impurities and the like. Therefore, it is necessary to select and use a carrier having a whiteness of 80 or more among these carriers.

The average particle size of these solid carriers is not particularly limited, but is preferably 0.5 to 50 μm, particularly preferably 2 to 20 μm.

It is preferable to use a carrier having a whiteness of 80 to 100, and one or two or more carriers may be used to prepare a solid insecticide according to a conventional method. The whiteness of the composition is preferably 65 or more, preferably 80 to 99. For that purpose, 4 to 95% by weight, preferably 15 to 85% by weight, of the above-mentioned carrier may be added based on the total composition of the solid insecticide composition.

The surfactant used in the present invention includes:
The solid insecticide composition is not particularly limited as long as it is usually used for imparting hydration property and dispersibility. For example, the following may be mentioned.

Examples of nonionic surfactants Polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene arylphenyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, polyoxy Examples thereof include ethylene polyoxypropylene block polymers, but those having an HLB of 13 to 18 are particularly preferable.

Anionic surfactant Higher alcohol sulfate ester salt, higher alkyl ether sulfate ester salt, sulfated fatty acid ester, sulfated olefin, polyoxyethylene alkyl ether sulfate ester salt, polyoxyethylene alkylphenyl ether sulfate ester salt, Polyoxyethylene styrenated phenyl ether sulfate ester salt, polyoxyalkylene styrenated phenyl ether sulfate ester salt, polyoxyethylene polyoxypropylene block polymer sulfate ester salt, polyoxyethylene alkylphenyl ether sulfonate, polyoxyethylene alkylphenyl ether Acetate sulfonate, polyoxyethylene aryl phenyl ether Acetate sulfonate, polyoxyalkylene alkylphenyl Ether acetate sulfonate, polyoxyalkylene aryl phenyl ether acetate, alkylbenzenesulfonates, alkylnaphthalene sulfonates,
Dialkyl sulfosuccinate, lignin sulfonate,
Higher alcohol phosphate ester salt, higher alkyl ether phosphate ester salt, polyoxyethylene alkyl ether phosphate ester salt, polyoxyethylene alkylphenyl ether phosphate ester salt, polyoxyethylene styrenated phenyl ether phosphate ester salt, polyoxy Examples thereof include alkylene styrenated phenyl ether phosphate ester salts, polyoxyethylene polyoxypropylene block polymer phosphate ester salts, and naphthalenesulfonic acid formalin condensates. Among these, particularly preferred are polyoxyethylene styrenated phenyl ether sulfate ester salt, polyoxyalkylene styrenated phenyl ether sulfate ester salt, polyoxyethylene styrenated phenyl ether phosphate ester salt, polyoxyalkylene styrenated phenyl ether phosphate ester. Ester salts, polyoxyethylene alkylphenyl ether acetic acid ester sulfonates, polyoxyethylene arylphenyl ether acetic acid ester sulfonates, and polyoxyalkylene alkyl phenyl ether acetic acid ester sulfonates.

These surfactants have a surface tension of a chemical solution of 40 to 65 mN / m (millinewton / meter), preferably 45 at 20 ° C. when the solid insecticide composition of the present invention is diluted 1000 times with water. To 50 mN / m in an amount sufficient to be added to the solid insecticide composition, and 0.5 to 20% by weight, preferably 1 to 15% by weight based on the total composition of the solid insecticide composition. Weight% may be added.

In the present invention, the solid pesticide composition is diluted with water to 10%.
If the surface tension of the drug solution diluted to 00 times is less than 40 mN / m, the insecticidal effect is reduced, and if it exceeds 65 mN / m, the hydratability is
Dispersibility cannot be obtained. Therefore, it is necessary to set the above range.

The form of the solid pesticide composition of the present invention is not limited as long as it can be diluted with water and then sprayed. So-called powdered wettable powder, granules or granules are used. Granular wettable powder, tablets and the like can be mentioned.

When molding into granules or tablets, a binder can be used. As the binder, polyvinyl alcohol, sodium carboxymethyl cellulose,
Gum arabic, heteropolysaccharide, sodium polyacrylate, dextrin, sodium alginate,
Examples thereof include polyethylene oxide.

The solid pesticide composition of the present invention may also contain, as auxiliary agents, stabilizers such as antioxidants and photodegradation inhibitors, foam inhibitors, oil absorbing agents, pigments, carbonates and solid acids. If desired, one or two or more kinds of the combined foaming agents may be blended.

The preparation method for preparing the solid insecticidal composition of the present invention as a wettable powder is carried out in the same manner as a conventional wettable powder, such as an acephate, a solid carrier, a nonionic surfactant and / or an anionic surfactant. If necessary, an auxiliary agent such as an oil absorbing agent is added to the agent, and the mixture is uniformly mixed, and then finely pulverized. It can be prepared with conventional equipment for the preparation of wettable powders and does not require any special equipment. As a method of fine pulverization, impact pulverization such as hammer mill,
Air flow type pulverization such as jet omizer can be mentioned.

When the solid insecticidal composition of the present invention is prepared as a granular wettable powder, it can be prepared by granulation in the same manner as a conventional granular wettable powder. Examples of the granulation method include extrusion granulation, tumbling granulation, crushing granulation, fluidized bed granulation and spray granulation.

The particle size and shape of the granular wettable powder are not particularly limited, but the particle size is, for example, about 50 in diameter.
The thickness is about 5 μm to 5 mm, and the shape is spherical, elliptical, cylindrical, or other irregular shape.

When the solid insecticide composition of the present invention is prepared as a tablet, it can be produced by tableting in the same manner as an ordinary tablet. For example, it can be prepared by tableting a predetermined amount of the above-mentioned granular wettable powder with a tablet molding machine.

[0035]

The present invention will be described in more detail with reference to the following examples, which should not be construed as limiting the invention thereto. All "parts" below refer to parts by weight.

Example 1 (Wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB 10.5) and 49 parts of Zyklite (whiteness 85) were mixed and finely ground with a hammer mill. A wettable powder (whiteness of 65) was obtained.

Example 2 (wettable powder) 50 parts of acephate raw material, 1 part of sodium polyoxyethylene alkylphenyl ether sulfonate and 49 parts of Sikhlite (whiteness 85) were mixed and finely ground with a hammer mill to prepare water. A hydrating agent (whiteness of 65) was obtained.

Example 3 (wettable powder) 75 parts of acephate drug substance, 1 part of polyoxyethylene alkyl ether (HLB 12.1), lactose (whiteness 8
2) 24 parts were mixed and finely ground with a hammer mill to obtain a wettable powder (whiteness 65).

Example 4 (Wettable powder) 30 parts of acephate raw material, 1 part of sodium alkylbenzene sulfonate, 49 parts of urea (whiteness 92) and 20 parts of diatomaceous earth (whiteness 50) were mixed and finely mixed with a hammer mill. It was pulverized to obtain a wettable powder (whiteness of 65).

Example 5 (Wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB 11), 44 parts of dichlite (whiteness 85), hydrous amorphous silicon dioxide (whiteness 98 ) 5 parts were mixed and finely pulverized with a hammer mill to obtain a wettable powder (whiteness 88).

Example 6 (Wettable powder) 50 parts of acephate drug substance, 5 parts of sodium polyoxyethylene alkylphenyl ether sulfate, silica stone (whiteness 85) 35 parts, perlite (whiteness 9
0) 10 parts were mixed and finely ground with a hammer mill to obtain a wettable powder (whiteness 85).

Example 7 (wettable powder) 75 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB 11), 12 parts of lactose (whiteness of 82) and 12 parts of sucrose (96 of whiteness) were mixed. Then, it was finely pulverized with a hammer mill to obtain a wettable powder (whiteness 78).

Example 8 (Wettable powder) 30 parts of acephate drug substance, 1 part of polyoxyethylene alkylphenyl ether (HLB 12.2), 54 parts of sucrose (whiteness 93), hydrous amorphous silicon dioxide (white) 15 parts) were mixed and finely pulverized with a hammer mill to obtain a wettable powder (whiteness 95).

Example 9 (Wettable powder) 50 parts of acephate raw material, 1 part of polyoxyethylene alkylphenyl ether (HLB 14.5) and 49 parts of kaolinite (whiteness 93) were mixed and finely ground with a hammer mill. To obtain a wettable powder (whiteness 85).

Example 10 (wettable powder) 75 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB 15.6), 3 parts of naphthalenesulfonic acid formalin condensate, 21 parts of sucrose (whiteness 96) Were mixed and finely pulverized with a hammer mill to obtain a wettable powder (whiteness 85).

Example 11 (Wettable powder) 50 parts of acephate drug substance, polyoxyethylene styrenated phenyl ether phosphate potassium 1
And 49 parts of kaolinite (whiteness 93) were mixed and finely pulverized with a hammer mill to obtain a wettable powder (whiteness 85).

Example 12 (Wettable powder) 30 parts of acephate drug substance, polyoxyalkylene styrenated phenyl ether sulfate ammonium ester
1 part, calcium lignin sulfonate 3 parts, sucrose (whiteness 96) 36 parts, kaolinite (whiteness 93)
30 parts were mixed and finely ground with a hammer mill to obtain a wettable powder (whiteness 88).

Example 13 (Wettable powder) 50 parts of acephate drug substance, 1 part of sodium polyoxyethylene alkylphenyl ether acetate acetate sulfonate, 49 parts of kaolinite (whiteness 93) were mixed and finely ground with a hammer mill. A wettable powder (whiteness 85) was obtained.

Example 14 (wettable powder) 30 parts of acephate drug substance, 1 part of sodium polyoxyethylene alkylphenyl ether acetate sulfonate, 3 parts of sodium lignin sulfonate, 36 parts of sucrose (whiteness 96), kaolinite (Whiteness 93)
30 parts were mixed and finely ground with a hammer mill to obtain a wettable powder (whiteness 88).

Example 15 (Granular wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB10.5), 46 parts of Zyklite (whiteness 85), polyvinyl alcohol 3
Parts were mixed and finely pulverized with a hammer mill, then 7 parts of water were added and kneaded, and the mixture was extruded, granulated by a granulator, dried, and then sieved to obtain a granule wettable powder of 14 to 48 mesh (whiteness 65) was obtained.

Example 16 (Granular wettable powder) 50 parts of acephate raw material, 1 part of ammonium polyoxyethylene alkylphenyl ether sulfonate, 46 parts of Zyklite (whiteness 85) and 3 parts of polyvinyl alcohol were mixed, and a hammer mill was used. After pulverizing with water, water 7
Extruding the kneaded mixture and extruding it with a granulator,
After drying, sieving was performed to obtain a wettable powder granule having a particle size of 14 to 48 mesh (whiteness: 65).

Example 17 (Granular wettable powder) 75 parts of acephate base material, 1 part of polyoxyethylene alkyl ether (HLB 12.1), 21 parts of ammonium sulfate (whiteness 82), and 3 parts of polyvinyl alcohol were mixed, and a hammer mill was used. After finely pulverizing with, the mixture was kneaded with 7 parts of water, extruded, granulated with a granulator, dried, and sieved to obtain a granule wettable powder of 14 to 48 mesh (whiteness 65).

Example 18 (Granular wettable powder) 30 parts of acephate drug substance, 1 part of sodium alkylnaphthalenesulfonate, 46 parts of urea (whiteness 92), 20 parts of silica stone (whiteness 75), polyvinyl alcohol 3
Parts were mixed and finely pulverized with a hammer mill, then 7 parts of water were added and kneaded, and the mixture was extruded, granulated by a granulator, dried, and then sieved to obtain a granule wettable powder of 14 to 48 mesh (whiteness 65) was obtained.

Example 19 (Granular wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB11), 41 parts of Zyklite (whiteness of 85), hydrous amorphous silicon dioxide (whiteness of 98) ) 5 parts and 3 parts of dextrin are mixed, finely pulverized with a hammer mill, 7 parts of water is added and kneaded, and the mixture is extruded, granulated by a granulator, dried and sieved to 14-4.
An 8-mesh granular wettable powder (whiteness 89) was obtained.

Example 20 (wettable granule) 50 parts of acephate drug substance, ammonium polyoxyethylene alkylphenol ether sulfate 5
Part, silica stone (whiteness 88) 39 parts, particulate titanium oxide (whiteness 98) 5 parts, and heteropolysaccharide 1 part were mixed, finely pulverized with a hammer mill, and then added with 7 parts of water and kneaded. Granulate with an extrusion granulator, dry, and then sieve to granulate 14-48 mesh wettable powder (whiteness 91)
I got

Example 21 (Granular wettable powder) 75 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB10), 11 parts of ammonium sulfate (whiteness 80), sucrose (whiteness 85) 12
Parts, 1 part of heteropolysaccharide, finely pulverized with a hammer mill, kneaded with 7 parts of water, extruded, granulated with an extrusion granulator, dried and sieved to obtain granule water of 14 to 48 mesh. A hydrating agent (whiteness 83) was obtained.

Example 22 (Granular wettable powder) 30 parts of acephate drug substance, 1 part of polyoxyethylene nonylphenyl ether (HLB12.2), 51 parts of sucrose (whiteness 93), water-containing amorphous silicon dioxide (white) Degree 9
8) 15 parts and 3 parts of dextrin were mixed and finely pulverized with a hammer mill, then 7 parts of water was added and kneaded, and the mixture was extruded, granulated by a granulator, dried and sieved to 14 to 48.
A mesh wettable powder (whiteness 95) was obtained.

Example 23 (Granular wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyethylene nonylphenyl ether (HLB14.5), 46 parts of kaolinite (whiteness 93) and 3 parts of polyvinyl alcohol were mixed, After finely pulverizing with a hammer mill, 7 parts of water was added and kneaded, and the mixture was extruded and granulated with a granulator, and after drying,
Granule wettable powder of 14 to 48 mesh after sieving (whiteness 8
5) was obtained.

Example 24 (Granular wettable powder) 30 parts of acephate drug substance, 10 parts of polyoxyethylene nonylphenyl ether (HLB17.5), 42 parts of sucrose (whiteness 95), diatomaceous earth (whiteness 90) 15
Parts, 3 parts of dextrin, finely pulverized with a hammer mill, kneaded with 7 parts of water, extruded, granulated with a granulator, dried and sieved to granulate 14-48 mesh granules The agent (whiteness 92) was obtained.

Example 25 (Granular wettable powder) 75 parts of acephate drug substance, 1 part of polyoxyethylene sorbitan fatty acid ester (HLB15.6), 3 parts of naphthalenesulfonic acid formalin condensate, 18 parts of sucrose (whiteness 96) , 3 parts polyvinyl alcohol,
After finely pulverizing with a hammer mill, 7 parts of water was added and kneaded, and the mixture was extruded, granulated with a granulator, dried and sieved to 1
A wettable powder granules of 4-48 mesh (whiteness 85) was obtained.

Example 26 (Granular wettable powder) 50 parts of acephate drug substance, 1 part of polyoxyalkylene styrenated phenyl ether phosphate triethanolamine, 46 parts of kaolinite (whiteness 93) and 3 parts of dextrin were mixed. After finely pulverizing with a hammer mill, 7 parts of water was added and kneaded, and the mixture was extruded, granulated with a granulator, dried and sieved to obtain a granule wettable powder of 14 to 48 mesh (whiteness 85). It was

Example 27 (Granular wettable powder) 30 parts of acephate drug substance, 1 part of sodium polyoxyethylene styrenated phenyl ether sulfate,
Calcium lignin sulfonate 3 parts, sucrose (whiteness 96) 35 parts, calcium carbonate (whiteness 93) 30 parts,
Heteropolysaccharide 1 part was mixed, finely pulverized with a hammer mill, then added with 7 parts of water, kneaded, extruded, granulated with a granulator, dried and sieved to obtain a granule wettable powder of 14 to 48 mesh (Whiteness 88) was obtained.

Example 28 (Granular wettable powder) 50 parts of acephate base material, 1 part of sodium polyoxyalkylene alkyl phenyl ether acetate ester sulfonate, 46 parts of kaolinite (whiteness 93) and 3 parts of dextrin were mixed and hammered. After pulverizing with a mill,
7 parts of water was added and kneaded, and the mixture was extruded, granulated by a granulator, dried and sieved to obtain a granule wettable powder (whiteness 85) of 14 to 48 mesh.

Example 29 (Granular wettable powder) 30 parts of acephate drug substance, 1 part of polyoxyethylene alkylphenyl ether acetate ester ammonium sulfonate, 3 parts of calcium lignin sulfonate, 35 parts of sucrose (whiteness 96), kaori Night (whiteness 93)
After mixing 30 parts and 1 part of polyvinyl alcohol and finely pulverizing with a hammer mill, what was kneaded by adding 7 parts of water was extruded and granulated with a granulator, dried and sieved to 14-4.
An 8-mesh granular wettable powder (whiteness 88) was obtained.

Example 30 (Granular wettable powder) 30 parts of acephate raw material, 1 part of polyoxyethylene arylphenyl ether acetate ester sulfonate calcium, naphthalene sulfonate formalin condensate 3
Parts, sucrose (whiteness 96) 35 parts, kaolinite (whiteness 93) 30 parts, and polyvinyl alcohol 1 part were mixed and finely pulverized with a hammer mill, and then 7 parts of water were added and kneaded to produce an extruded product. After granulating with a granulator, drying and sieving, a wettable powder of 14 to 48 mesh (whiteness 86) was obtained.

Comparative Example 1 (Wettable Powder) A polyoxyethylene sorbitan fatty acid ester (HLB11) of Example 5 was replaced by polyoxyethylene oleyl ether (HLB10).

Comparative Example 2 (Wettable Powder) Prepared by substituting the Sigleite having a whiteness of 85 in Example 5 with Sieglite having a whiteness of 75, and the hydrated amorphous silicon dioxide having a whiteness of 98 with talc having a whiteness of 55. did.

Comparative Example 3 (wettable powder) 49 parts of the kaolinite of Example 9 was prepared as 45 parts, and 1 part of polyoxyethylene alkylphenyl ether was prepared as 5 parts.

Comparative Example 4 (Wettable Powder) Kaolinite having a whiteness of 93 in Example 9 was replaced with kaolinite having a whiteness of 75.

Comparative Example 5 (wettable powder) 49 parts of the kaolinite of Example 11 was used as 47 parts, and 1 part of polyoxyethylene styrenated phenyl ether phosphate potassium was used as 3 parts.

Comparative Example 6 (Wettable Powder) Kaolinite having a whiteness of 93 in Example 11 was replaced with kaolinite having a whiteness of 75.

Comparative Example 7 (Wettable Powder) 36 parts of the sucrose of Example 12 was used as 32 parts, and 1 part of polyoxyalkylene styrenated phenyl ether ammonium sulfate was used as 5 parts.

Comparative Example 8 (Wettable Powder) A sucrose having a whiteness of 96 of Example 12 was replaced with sucrose having a whiteness of 75, and kaolinite having a whiteness of 93 was replaced with bentonite having a whiteness of 53.

Comparative Example 9 (wettable powder) 49 parts of the kaolinite of Example 13 was used as 47 parts, and 1 part of sodium polyoxyethylene alkylphenyl ether acetate sulfonate was used as 3 parts.

Comparative Example 10 (Wettable Powder) A kaolinite having a whiteness of 93 in Example 13 was replaced with a kaolinite having a whiteness of 75.

Comparative Example 11 (Granular wettable powder) A polyoxyethylene sorbitan fatty acid ester (HLB11) of Example 19 was replaced with polyoxyethylene oleyl ether (HLB10).

COMPARATIVE EXAMPLE 12 (Granular wettable powder) In the same manner as Example 19, instead of syrclite having a whiteness of 85 and 75, the hydrated amorphous silicon dioxide having a whiteness of 98 was replaced with talc having a whiteness of 55. Prepared.

Comparative Example 13 (Granular wettable powder) 46 parts of the kaolinite of Example 23 was replaced with 42 parts, and 1 part of polyoxyethylene nonylphenyl ether was replaced with 5 parts.

Comparative Example 14 (Granular wettable powder) A kaolinite having a whiteness of 93 in Example 23 was replaced with a kaolinite having a whiteness of 75.

Comparative Example 15 (Granular wettable powder) 46 parts of the kaolinite of Example 26 was replaced with 44 parts, and 1 part of the polyoxyalkylene styrenated phenyl ether phosphate triethanolamine was replaced with 3 parts.

Comparative Example 16 (wet granule) A kaolinite having a whiteness of 93 in Example 26 was replaced with a kaolinite having a whiteness of 75.

Comparative Example 17 (Granular wettable powder) 35 parts of sucrose of Example 27 was prepared as 31 parts, and 1 part of sodium polyoxyethylene styrenated phenyl ether sulfate was prepared as 5 parts.

Comparative Example 18 (Granular wettable powder) A sucrose having a whiteness of 96 in Example 27 was replaced with sucrose having a whiteness of 75.

Comparative Example 19 (Granular wettable powder) 46 parts of the kaolinite of Example 28 was replaced with 44 parts, and 1 part of sodium polyoxyalkylene alkylphenyl ether acetate sulfonate was replaced with 3 parts.

Comparative Example 20 (Granular wettable powder) A kaolinite having a whiteness of 93 in Example 28 was replaced with a kaolinite having a whiteness of 70.

Next, the usefulness of the solid pesticide composition of the present invention will be shown by test examples.

Test Example 1 Insecticidal efficacy test 1) Whiteness The powdery material was left as it was, and the granular material was ground in a mortar and crushed with a color ace MODEL TC-8600 [Tokyo Denshoku Co., Ltd.] (JIS Z8760) to obtain L *. a * b
* Color system (* is star; same below) [CIE1976
The lightness index L * in the (L * a * b *) color space and the chromatic indices a * and b * were measured, and the whiteness was determined by the following formula.

[0088]

[Equation 1]

Ap, bp: Chromanetic index in the standard white L * a * b * color system was 0.00 using a standard white plate.

2) Surface tension 90 ml of distilled water at 20 ° C. was placed in a 100 ml capacity cylinder with a stopper, 100 mg of the solid pesticide composition prepared according to the example was added, and then the volume was adjusted to 100 ml with distilled water and sealed. . Then, the cylinder is turned over 20 times to disperse the solid insecticide composition to obtain a diluent. CBVP surface tensiometer CBVP-A3 type (manufactured by Kyowa Interface Science Co., Ltd.)
The surface tension of the diluted solution is measured at 20 ° C. The results are shown in Tables 1 to 6 below.

3) Initial Effect Test of Insecticidal Efficacy The solid insecticide composition of the present invention prepared according to the example is diluted with tap water so that the concentration of acephate as the active ingredient is 50 ppm, and a manual sprayer is used. Using diameter 30c
Eggplant planted in m pot (variety: Senryo No. 2, plant height 50 cm)
Each 10 ares was sprayed with an amount equivalent to 100 liters. After air-drying, 10 wingless peach aphid adults were released per strain and placed in a glass greenhouse. The number of wingless adults that survived on the eggplant strains was counted one day after release, and the mortality rate was calculated. The insecticidal effect was shown by the following criteria.

The spraying concentration of 50 ppm is about one-tenth the concentration when the existing solid insecticide composition containing acephate is diluted and sprayed.

The test was carried out with 1 ward and 1 share and 5 wards.

[0094]

The results are shown in Tables 1 to 6.

4) Evaluation of residual effect The solid pesticide composition of the present invention prepared according to the examples was sprayed in the same manner as in the above 3) and then placed outdoors. Seven days after spraying, 10 wingless adults of the green peach aphid were released per strain, and one day after releasing, the number of wingless adults that survived on the eggplant strains was counted to obtain the mortality rate. The same criteria as above were used.

The test was carried out under the condition of 1 ward and 1 share and 5 wards.

The results are shown in Tables 1 to 6.

Further, the whiteness of the solid preparation of Comparative Example, the surface tension of the diluted solution and the biological effect were measured in the same manner as in Test Examples 1 to 3. The results of these comparative examples are also shown in Tables 1 to 5.

[0100]

EFFECT OF THE INVENTION The solid insecticide composition of the present invention provides a sufficient insecticidal effect even with a small amount of acephate sprayed, and has a long residual effect, which is economical and safe as compared with the conventional ones. Is excellent in terms of.

[0101]

[Table 1]

[0102]

[Table 2]

[0103]

[Table 3]

[0104]

[Table 4]

[0105]

[Table 5]

[0106]

[Table 6]

Claims (2)

[Claims] 1. A solid insecticidal preparation comprising the following (a) to (c), wherein the surface tension of the drug solution when the solid insecticide is diluted 1000 times with water is in the range of 40 to 65 mN / m. A solid insecticide composition comprising the surfactant (b) as described above. (A) As an insecticidal active ingredient, O, S-dimethyl-N-acetylphosphoramidothioate (b) Nonionic surfactant and / or anionic surfactant (c) Whiteness is 80 or more Solid carrier 2. The solid insecticide composition according to claim 1, which is formulated to have a whiteness of 65 or more. [0001]