JPH11199409A - Herbicide composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition remarkably reduced in a crop injury to transplanted paddy rice without impairing preventive effect of carfentrazone-ethyl against various weeds by including quinoclamine and carfentrazone-ethyl. SOLUTION: This composition is propared by including (A) quinoclamine and (B) carfentrazone-ethyl in a quantity of 0.001-100 pts.wt. (preferably 0.01-10 pts.wt.) based on 100 pts.wt. of the component A, as active principles. The composition is preferably applied in a quantity of 10 g-10 kg/ha of the component A plus 1 g-10 kg/ha of the component B. The composition is preferably used in a form of formulation such as solution, emulsion, wettable powder, water-soluble powder, granular wettable powder, ganular water-soluble powder, suspension, powder, granule, etc., by blending itself with suitable solid carrier or liquid carrier, and moreover, where necessary, by blending a surfactant, a penetrant, a spreading agent, a thickening agent, an antifreezing agent, a binder, an anti-solidifying agent, a disintegrant, a stabilizer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a herbicidal composition for rice.

[0002]

2. Description of the Related Art At present, a number of compounds have been put into practical use as herbicides for paddy rice. However, existing chemicals do not cause harm to transplanted rice, and only select target weeds. Does not always completely meet the requirements for control. Quinoclamin (common name) has already been put to practical use as a rice herbicide effective for controlling algae, duckweed and the like.

[0003] Carfentrazone ethyl (generic name)
Is a compound under development as a wheat herbicide. In addition, as a rice herbicide, it has a high control effect against eel and annual broadleaf weeds, and provides high safety against transplanted rice under normal planting conditions. In some cases, phytotoxicity may occur in transplanted paddy rice.

[0004]

Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies and as a result, found that a herbicidal composition comprising quinoclamin and carfentrazone-ethyl as active ingredients (hereinafter referred to as the present invention). (Referred to as invention composition)
We have found the following excellent effects.

[0005] In the composition of the present invention, by adding quinoclamin to carfentrazone-ethyl, the carfentrazone-ethyl phytotoxicity to transplanted rice is remarkably maintained while maintaining the control effect of carfentrazone-ethyl on various weeds. Can be reduced. Furthermore, the composition of the present invention has the same effect on direct-seeded rice.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The composition of the present invention exhibits a favorable effect when carfentrazone ethyl is contained in an amount of 0.001 to 100 parts by weight per 1 part by weight of quinoclamin. Zonethyl 0.01
A more preferable effect can be expected when it is contained in an amount of up to 10 parts by weight.

[0007] The suitable amount of the treatment agent of the composition of the present invention depends on the kind of the target weeds to be controlled, etc., but as active ingredients, quinoclamin is 10 g to 10 kg / ha, and carfentrazone ethyl is 1 g to 10 kg / ha. In the case of quinoclamin
0.1kg-3kg / ha, carfentrazone ethyl 0.01kg
In the case of ~ 3 kg / ha, a more favorable effect can be expected. When applying the composition of the present invention, usually mixed with a suitable solid carrier or liquid carrier, and further optionally a surfactant,
Add a penetrant, spreading agent, thickener, antifreezing agent, binder, anti-caking agent, disintegrating agent, anti-decomposition agent, etc. to make a solution, emulsion, wettable powder, aqueous solvent, wettable powder for granules It can be put to practical use in any form of formulation such as aqueous solution of granules, suspension, emulsion, suspoemulsion, microemulsion, powder, granule and gel.

At this time, a plurality of other herbicides, insecticides,
It can be used in combination with fungicides, plant growth regulators, fertilizers and the like. In particular, by blending one or more other herbicides, the herbicidal spectrum can be broadened, and the effect of the present invention can be made more stable. Further, from the viewpoint of labor saving and improvement of safety, the above-mentioned preparation of any dosage form can be provided by being enclosed in a water-soluble package.

Examples of solid carriers include natural minerals such as quartz, kaolinite, pyrophyllite, sericite, talc, bentonite, acid clay, attapulgite, zeolite and diatomaceous earth, calcium carbonate, ammonium sulfate, sodium sulfate and potassium chloride. And the like, synthetic silicic acid and synthetic silicate. As liquid carriers, for example, alcohols such as ethylene glycol, propylene glycol and isopropanol,
Aromatic hydrocarbons such as xylene, alkylbenzene and alkylnaphthalene; ethers such as butyl cellosolve; ketones such as cyclohexanone; esters such as γ-butyrolactone; acid amides such as N-methylpyrrolidone and N-octylpyrrolidone; Vegetable oils such as soybean oil, rapeseed oil, cottonseed oil and castor oil and water.

These solid and liquid carriers may be used alone or in combination of two or more. As a surfactant,
Nonionic properties such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester Surfactant, alkyl sulfate, alkyl benzene sulfonate, lignin sulfonate, alkyl sulfosuccinate, naphthalene sulfonate, alkyl naphthalene sulfonate, salt of naphthalene sulfonic acid formalin condensate, alkyl naphthalene sulfonic acid formalin Salts of condensates, polyoxyethylene alkylaryl ether sulfates and phosphates, polyoxyethylene styryl phenylate Anionic surfactants such as sulfuric acid and phosphates, polycarboxylates and polystyrene sulfonates, cationic surfactants such as alkylamine salts and alkylquaternary ammonium salts, and amphoteric surfactants such as amino acid type and betaine type Is mentioned.

The content of these surfactants is not particularly limited, but is preferably in the range of usually 0.05 to 20 parts by weight based on 100 parts by weight of the preparation of the present invention. These surfactants may be used alone or in combination of two or more. Next, formulation examples of the preparation will be described. However, the composition examples of the present invention are not limited to these. In the following formulation examples, "parts" means parts by weight.

[Wettable powder] Active ingredient 0.1 to 80 parts Solid carrier 5 to 98.9 parts Surfactant 1 to 10 parts Others 0 to 5 parts Others include, for example, an anti-caking agent and an anti-decomposition agent.

[Emulsion] 0.1 to 30 parts of active ingredient 55 to 95 parts of liquid carrier Surfactant 4.9 to 15 parts Others 0 to 10 parts Others include, for example, spreading agents and decomposition inhibitors.

[Suspension] Active ingredient 0.1-70 parts Liquid carrier 15-98.89 parts Surfactant 1-12 parts Others 0.01-30 parts Others include, for example, an antifreezing agent and a thickener.

[Water-dispersible granules] Active ingredient 0.1 to 90 parts Solid carrier 0 to 98.9 parts Surfactant 1 to 20 parts Others 0 to 10 parts Others include, for example, a binder and a decomposition inhibitor.

[Granules] Active ingredient 0.01 to 10 parts Solid carrier 90 to 99.99 parts Others 0 to 10 parts Others include, for example, a binder and a decomposition inhibitor.

[0017]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the compounds, dosage amounts, dosage forms and the like in the present invention are not limited only to the examples. All “parts” mean parts by weight.

[Formulation Example 1] Granules quinoclamin 7 parts Carfentrazone ethyl 2 parts Bentonite 53 parts Talc 38 parts After uniformly mixing and pulverizing the above, a small amount of water was added, followed by stirring, mixing and kneading, followed by extrusion molding. Granulate with a granulator and dry to granules.

[Formulation Example 2] Granule wettable powder (dry flowable) quinoclamin 45 parts Carfentrazone ethyl 25 parts Hytenol NE-15 5 parts (anionic surfactant: trade name of Daiichi Kogyo Seiyaku Co., Ltd.) ) Vanilex N 10 parts (Anionic surfactant: Nippon Paper Industries Co., Ltd.) Carplex # 80D 10 parts (Synthetic hydrous silicic acid: Shionogi & Co., Ltd. trade name) Pyrophilite 5 parts or more are mixed uniformly After pulverization, a small amount of water is added, and the mixture is kneaded with stirring, kneaded, granulated by an extrusion granulator, and dried to obtain a wettable powder.

[Formulation Example 3] Water dispersant quinoclamin 50 parts Carfentrazone ethyl 25 parts Solpol 5039 2 parts (mixture of a nonionic surfactant and an anionic surfactant: trade name of Toho Chemical Industry Co., Ltd.) 2 parts of Carplex # 80D (synthetic hydrous silicic acid: trade name of Shionogi & Co., Ltd.) Pyrophyllite 21 parts The above components are uniformly mixed and pulverized to obtain a wettable powder.

Next, the usefulness of the composition of the present invention as a herbicide will be specifically described in the following test examples. [Test Example 1] Chemical damage test of transplanted rice under shallow planting conditions After placing alluvial soil in a 1/5000 arel Wagner pot, water was added and mixed to obtain a flooded condition of 4 cm water immersion. 2.
Rice seedlings at the 5 leaf stage were transplanted at a depth of 0.5 cm. On the day of transplantation, a suspension having a predetermined concentration of the reagent was dropped using a wet pipette using a wettable powder prepared in accordance with Formulation Example 3. Three weeks after the drug treatment, the live weight of the above-ground part was measured and compared with the untreated group. Table 1 shows the results.

Test Example 2 Test of Herbicidal Effect under Flooding Conditions After placing alluvial soil in a 1/5000 arel Wagner pot, water was added and mixed to obtain a flooding condition of 4 cm water immersion. Nobies, congers and fireflies were sown. On the 7th day after seeding (1.5 leaves, 2 leaves, 2 leaves, 2 leaves of firefly), a suspension having a predetermined concentration of the test agent was dropped using a wet pipette using a wettable powder prepared according to Formulation Example 3. did. Three weeks after the chemical treatment, the herbicidal effect on various weeds was examined according to the following criteria. The results are shown in Table 2.

Criteria 5: Complete withering or suppression of 90% or more 4: Suppression of 70-90% 3: Suppression of 40-70% 2: Suppression of 20-40% 1: Suppression of 5-20% 0: 5 % Suppression The degree of suppression was determined by visual observation and evaluation.

[0024]

[Table 1] Table 1 化合物 Compounds Ratio of active ingredients to non-treated fresh weight (%) Treatment amount (g / ha ) ──────────────────────── (A) 500 100 (B) 250 70 (B) 500 53 (A) + (B) 500 + 250 100 500 + 500 100 ────────────────────────

In the above table, (A) represents quinoclamin, (B)
Represents carfentrazone-ethyl.

[0026]

[Table 2] Table 2 ────────────────────────────────── Compounds Novier Firefly Konagi treatment amount of active ingredient (g / ha) ────────────────────────────────── (A) 500 0 1 4 (B) 125 3 3 4 (B) 250 4 4 4 (B) 500 5 5 5 (A) + (B) 500 + 125 4 4 5 (A) + (B) 500 + 250 5 5 5 (A) + (B) 500 + 500 5 5 5 ──────────────────────────────────

In the above table, (A) represents quinoclamin, (B)
Represents carfentrazone-ethyl.

[0028]

As is apparent from Test Examples 1 and 2, the composition of the present invention significantly reduced the phytotoxicity to transplanted rice without reducing the herbicidal effect of carfentrazone-ethyl.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI A01N 25/30 A01N 25/30 43/653 43/653 Q

Claims (2)

[Claims] 1. A herbicidal composition comprising quinoclamin and carfentrazone-ethyl as active ingredients. 2. A herbicidal method using the herbicidal composition according to claim 1.