JP3173166B2 - Fungicidal composition for seed treatment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a fungicidal composition for treating seeds.

[0002]

2. Description of the Related Art Conventionally, various bactericidal active ingredients have been known. When these are used as a fungicide for treating seeds, usually, a surfactant and a mineral carrier are added to the fungicidal active ingredient, mixed and formulated into a wettable powder, and the wettable powder is added at a low magnification, specifically, 2 parts. A method of diluting the seed by 25 times by weight and spraying the diluted solution on the seed or dipping the seed in the diluted solution is used.

[0003]

However, in the case of the conventional wettable powder, a large amount of precipitate forms a hard cake in a high-concentration diluent, and the spray sprayer may be blocked or a used chemical tank may be used. Cleaning the bottom was difficult. This is particularly problematic in practical use when dealing with rice paddy processing in large quantities, such as in a seed processing center. For these reasons, development of a disinfecting composition having good dispersibility is desired.

[0004]

Means for Solving the Problems In view of such a situation, the present inventors have made various studies and found that a sterilizing composition excellent in dilutability which does not have the above-mentioned problem of hard cake even at high concentration dilution. They found something and completed the present invention. That is, the present invention relates to a micropowder-based germicidal composition comprising (a) a bactericidal active ingredient (b) a surfactant (c) sodium tripolyphosphate (d) a mineral carrier (hereinafter referred to as the present composition). .). The plant diseases that can be controlled using the composition of the present invention include rice fir blight (Pseudomonas glumae), rice blight (Pseudomonas plantarii), and rice brown streak (Pseudomonas disease).
udomonas avanue, rice stupid seedling disease (Gibberella fuji)
kuroi), sesame leaf blight of rice (Cochlioborus miyayabean)
us), rice blast (Pyricularia oryzae), barley smut (Ustilago nuda), wheat scab (Tilletia caries, Tilletia foetida), wheat hard smut (Ustilago hordei), wheat leaf spot (Utila hordei) Cochliobor
us sativus), black leg disease of potato (Rhizoctonia sola)
ni).

As the germicidal active ingredient of the composition of the present invention, any germicidal active ingredient suitable for the disease to be controlled can be used, and specific examples include the following compounds. Further, one or more kinds of sterilizing active ingredients may be used in combination. 1) 5-ethyl-5,8-dihydro-8-oxo-1,
3-dioxolo [4,5-g] quinoline-7-carboxylic acid 2) (E) -1- (2,4-dichlorophenyl) -4,
4-dimethyl-2- (1,2,4-triazole-1-
Yl) -1-penten-3-ol 3) 1- {1- (4-chloro-2 (trifluoromethyl) phenylimino) -2-propoxyethyl} -1H
-Imidazole 4) 4- (2,2-Difluoro-1,3-benzodioxol-4-yl) pyrrole-3-carbonitrile) 5) Pent-4-enyl = N-furfuryl-N-imidazole-1-ylcarbonyl-DL -Homoalanite 6) O-2,6-dichloro-4-methylphenyl-O,
O-phosphorodithioate 7) N-propyl-N- {2- (2,4,6-trichlorophenoxy) ethyl} imidazole-1-carboxamide Concentration (weight ratio) of these bactericidal active ingredients in the composition of the present invention.
Is usually 0.1% to 80%, preferably 1% to 50%, but is not limited thereto. Specific examples of the surfactant in the present invention include alkyl sulfates such as sodium lauryl sulfate, aryl sulfonates such as sodium alkylaryl sulfonate and sodium alkylnaphthalene sulfonate, and lignin sulfones such as sodium lignin sulfonate. Anionic surfactants such as acid salts, succinates, polyethylene glycol alkylaryl ether sulfates, formalin condensates of aromatic sulfonates, high molecular ionic dispersants such as polycarboxylic acids, polyoxyethylene Examples include nonionic surfactants such as alkyl ethers, polyoxyethylene alkylaryl ethers, and polyoxyethylene arylaryl ethers.
The concentration of the surfactant in the composition of the present invention is usually in a weight ratio.
It is in the range of 0.5 to 10%, preferably 2 to 7%, but is not limited thereto. . In the present invention, the concentration of sodium tripolyphosphate in the composition of the present invention is a concentration necessary for preventing a hard cake of a diluted chemical solution, and is usually 0.001% to 50%, preferably 5 to 40% by weight. %, But is not limited thereto. In the present invention, as a mineral carrier, kaolin clay, ttattalgite clay, sericite clay, pyrophyllite clay, montmorillonite clay, zeolite, bentonite, acid clay, activated clay,
Examples include serpentine, talc, diatomaceous earth, and pyroxene.
The concentration of the mineral carrier in the composition of the present invention is usually 1 to 70% by weight, preferably 20 to 70%. The composition of the present invention may contain, if necessary, other components such as a synthetic carrier, a stabilizer, a dye, an inorganic salt, and an organic material, in addition to the main component. Specific examples include, for example, inorganic salts such as sulfates, nitrates and chlorides, organic substances such as saccharides, starch and dextrin, synthetic carriers such as synthetic hydrous silicic acid, BH
Stabilizers such as T, isopropyl acid phosphate,
Pharmaceutical auxiliaries such as diazo, phthalocyanine, anthraquinone, and formazan dyes can be used. The composition of the present invention can be obtained by the same production method as a usual wettable powder. That is, (a) a bactericidal active ingredient (b)
Surfactant (c) sodium tripolyphosphate and (d) mineral carrier, if necessary, synthetic carrier, stabilizer,
The composition of the present invention can be obtained by adding a pigment, an inorganic salt, an organic substance, etc., mixing with a mixer or the like, and finely pulverizing the mixture with a pulverizer such as an air mill, a hammer mill or a centrifugal pulverizer to, for example, an average particle diameter of 20 μm or less. it can. When applying the composition of the present invention, usually, the composition of the present invention is diluted 2 to 25 times by weight with water, and the diluted liquid is sprayed at a ratio of 1 to 10 parts with respect to 100 parts of the seed weight using a spray machine. Alternatively, a method is used in which seeds are immersed in 100 parts by weight of the diluent at 50 to 100 parts by weight for 5 minutes to 24 hours.

[0006]

EFFECT OF THE INVENTION The composition of the present invention is excellent in high-concentration dilutability, because the sediment in the diluted solution that has been left is easily redispersed by gentle stirring.

[0007]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Formulation Examples, Comparative Examples, and Test Examples, but the present invention is not limited thereto. Formulation Example 1 20 parts by weight of a bactericidal active ingredient (1), 3 parts of a polyoxyethylene alkylaryl ether sulfate, 2 parts of an aromatic sulfonate, and 20 parts of sodium tripolyphosphate,
The whole was made up to 100 parts by adding zeolite, mixed by a mixer, and finely pulverized by a centrifugal pulverizer to obtain a composition of the present invention. Formulation Example 2 Kaolinite clay was added to 60 parts by weight of the bactericidal active ingredient (1), 3 parts of polyoxyethylene nonylphenyl ether, and 10 parts of sodium tripolyphosphate to give a total of 1 part.
The mixture was mixed with a mixer and finely pulverized by a centrifugal pulverizer to obtain a composition of the present invention. Formulation Example 3 Diatomaceous earth was added to 5 parts by weight of a bactericidal active ingredient (1), 3 parts of polyoxyethylene nonylphenyl ether, and 50 parts of sodium tripolyphosphate to make the whole 100 parts, mixed by a mixer, and centrifuged. The composition of the present invention was obtained by pulverizing with a pulverizer. Formulation Example 4 A composition of the present invention was obtained in the same manner as in Formulation Example 1, except that the fungicidal active ingredient (2) was used instead of the fungicidal active ingredient (1). Formulation Example 5 20 parts by weight of the fungicidally active ingredient (5), 3 parts of polyoxyethylene alkylaryl ether sulfate, 2 parts of aromatic sulfonate, 20 parts of sodium tripolyphosphate, 2 parts of
Zeolite is added to 0 parts of synthetic hydrated silicic acid to make 1 part.
The mixture was mixed with a mixer and finely pulverized by a centrifugal pulverizer to obtain a composition of the present invention. Formulation Example 6 A composition of the present invention was obtained in the same manner as in Formulation Example 1, except that the fungicidal active ingredient (6) was used instead of the fungicidal active ingredient (1). Comparative Example 1 Zeolite was added to 20 parts by weight of the fungicidal active ingredient (1), 3 parts of polyoxyethylene alkylaryl ether sulfate, 2 parts of aromatic sulfonate, and the whole was made up to 100 parts, and mixed with a mixer. Then, the mixture was finely pulverized with a centrifugal pulverizer to obtain a comparative composition.

Test Example 1 15 g of Example 1 and Comparative Example 1 were placed in a 100 ml stoppered cylinder and diluted with distilled water to make 100 ml. Invert the cylinder and stir to prepare a uniform diluent.
Left for 4 hours. After the standing, the cylinder was inverted again, and the number of cylinder inversions required for complete re-dispersion of the sedimented layer in the fixed portion was counted. Table 1 shows the results.

[Table 1] Test Example 2 100 ml of distilled water was put into a beaker, 15 g of Example 1 and Comparative Example 1 were added, and the mixture was stirred with a spatula to prepare a uniform diluent. All of this diluent is shown in FIG.
It was left in a glass tube having an inner diameter of 11 mm and a length of 90 cm for 48 hours. After standing, water was passed through the glass tube at a rate of 500 ml / min using a roller pump. One hour later, the residue was transferred to a beaker, dried in a high-temperature device at 80 ° C, and the weight of the solid was weighed. Table 2 shows the results.

[Table 2]

[Brief description of the drawings]

FIG. 1 is a side view of a glass tube used in Test Example 2. FIG.

────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI A01N 43/54 A01N 43/54 59/26 59/26 (56) References JP-A-5-279201 (JP, A) JP JP-A-5-339104 (JP, A) JP-A-5-124914 (JP, A) JP-A-56-10102 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01N 25 / 00 A01N 43/54 A01N 59/26

Claims (1)

(57) [Claims] A finely divided fungicidal composition for seed treatment comprising (a) a bactericidal active ingredient (b) a surfactant (c) sodium tripolyphosphate and (d) a mineral carrier as main components.