TWI382815B - Herbicide composition - Google Patents

Description

Weeding composition

The present invention relates to a novel herbicidal composition and a method for controlling weeds used in combination with two or more herbicidal active compounds in order to selectively remove undesired weeds in the cultivation of cultivated plants such as crops.

In the agricultural field, herbicides have been used since the early stage of productivity improvement and labor saving. So far, various herbicides have been developed in response to the types of cultivated crops and weeds removed. In this case, the herbicide has no adverse effects relative to the cultivated plants, and is as effective as possible with respect to most types of weeds; that is, it is preferred to have a broad spectrum of herbicidal.

However, in recent years, after using the same type of herbicide for a long period of time, the weeds which are resistant to and difficult to remove relative to the herbicide increase, and environmental pollution becomes a social problem due to the large-scale use of the pesticide, and it is expected Highly active herbicides that are resistant to weeds and that exhibit sufficient effects at low doses.

On the other hand, in order to control as much as possible the deterioration of the soil quality of different herbicides used in the growth period of each crop or weed, and corresponding to the irregular growth of weeds which have been used for a long period of time, it is more desirable that the residual effect is good. And it is a long-lasting herbicide that can be used for a long period of time from the growth of weeds to the long period of growth.

Further, in the case of herbicides, due to meteorological conditions, such as the temperature, the presence or absence of wind, the strength of sunlight, etc.; soil conditions, such as soil composition, organic matter content, etc.; cultivation conditions, such as transplant depth, water depth Etc.; application conditions of herbicides, such as uneven distribution, excessive dispersion, etc.; cause phytotoxicity to crops. It is expected that the conditions will be changed; there will be herbicides that do not cause phytotoxicity to crops.

On the other hand, the two compounds are combined to improve the disadvantages of the herbicide having the individual compound as an active ingredient. For example, as a herbicide composition which is a mixture of a herbicide for rice and a well-known compound, it is used as a herbicide composition for improving the safety of a sulfonium anilide derivative which exhibits a broad spectrum of herbicidal activity in a paddy field (JP2000-281513A) When used alone, it has to be used at a high concentration, which has an adverse effect on rice, and is in 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-6-methoxy Among the methyl-N-difluoromethanesulfonylaniline, a combination of a compound which is an active ingredient of an herbicide such as orthobencarb, bensulide, asulam or propanil, and a herbicide composition (WO2004/010784A1) which improves its disadvantage.

However, these herbicide compositions do not sufficiently satisfy all of the above-mentioned desired matters; further, the development of herbicide compositions exhibiting superior effects has become an important issue in the agricultural field.

The present invention is intended to provide a herbicidal composition which has the above-mentioned disadvantages of the conventional herbicide, has a broad herbicidal spectrum, exhibits high activity with respect to weeds, is excellent in residual effect, and has high safety with respect to cultivated plants.

The working colleagues of the present invention have developed herbicides in order to achieve the above various expectations. As a result of intensive research, it has been found that the difluoromethanesulfonylanilide compound or its salt represented by the general formula, and the herbicidal specificity The combination of the compounds as the active ingredient and the herbicidal composition can prevent and remove the growth of various undesired weeds for a long time during rice cultivation, dry farming, horticultural cultivation, and dwarf cultivation, and is relatively cultivated. The plant exhibits high safety and exerts this effect both before and after germination, and the present invention has been completed on the basis of the knowledge.

That is, the present invention provides a herbicidal composition comprising: (A) a compound (ingredient A) selected from the group consisting of a difluoromethanesulfonylanilide compound represented by the general formula (I) or a salt thereof, And (B) at least one selected from the group consisting of pyraclonil, imazosulfuron, esprocarb, metamifop, triaziflam, pyrazoxyfen, 2,4-D, etobenzanid, mesotrion, tefuryltrione, and herbicidal microorganisms (ingredient B) as an active ingredient; and using the herbicidal composition A method of controlling the production or growth of undesirable weeds in a crop cultivation area.

(wherein R ¹ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxyalkyl group having 2 to 6 carbon atoms).

The difluoromethanesulfonylanilide compound represented by the general formula (I) used as the component A of the present invention has herbicidal activity alone (JP2000-44546A).

On the other hand, pyraclonil, tefuryltrione, imazosulfuron, halosulfuron-methyl, esprocarb, oxadiazon, metamifop, cumyluron, clomazone, triaziflam, penoxsulam, pyrazoxyfen, 2,4-D, MCPA, cyclosulfamuron, azimsulfuron, etobenzanid, ethoxysulfuron, cinosulfuron, flucetosulfuron, Pyribenzoxim, mesotrion, etc., constitute a group exhibiting herbicidal activity relative to common weeds. [For example, "The Pesticide Manual" and other 13th edition, 2004 (British Crop Protection Council issue) and "AG CHEM New compound Review 2006" (AGRANOVA issue).

However, the present invention is particularly characterized in that it is selected from the above group by using pyraclonil, imazosulfuron, esprocarb, metamifop, triaziflam, pyrazoxyfen, 2,4-D, etobenzanid, mesotrion, and tefuryltrione in combination with component A. Further, the microorganism for weeding can be used in the same manner as these.

By combining the above-mentioned component A and component B, the synergistic effect can be exerted; when used alone, the desired wide range of herbicidal spectrum can not be obtained, and the growth control effect of weeds over a long period of time and Adequate safety for the protection of cultivated plants.

R ¹ in the compound of the general formula (I) of the component A of the present invention is a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms or a linear or branched carbon group having 2 to 6 carbon atoms. Alkoxyalkyl. The alkyl group is preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a t-butyl group, a pentyl group, a 1-methylbutyl group or a hexyl group, and more preferably an ethyl group. Suitable for. Alkoxyalkyl group is preferably methoxymethyl, methoxyethyl, ethoxyethyl, 3-ethoxypropyl, 1-methyl-3-methoxybutyl, etc. Oxymethyl groups are more suitable.

Further, the difluoromethanesulfonylanilide compound represented by the general formula (I) or a salt thereof may be selected from the group consisting of halosulfuron-methyl, oxadiazon, cumyluron, clomazone, penoxsulam, MCPA, cyclosulfamuron, azimsulfuron, ethoxysulfuron, cinosulfuron, At least one compound of flucetosulfuron, pyribenzoxim, or the like is used in combination.

On the other hand, the component B is preferably selected from the group consisting of pyraclonil, imazosulfuron, esprocarb, metamifop, triaziflam, pyrazoxyfen, 2,4-d, etobenzanid, mesotrion, tefuryltrione and herbicidal microorganisms. By this combination with the component A, it exhibits a faster appearance than the herbicidal effect when used alone, and thus a high herbicidal effect or a broad herbicidal spectrum which cannot be predicted by the herbicidal effect when used alone can be obtained. However, in the case of the compound other than the above component B, for example, the herbicidal property which is comparable to the above compound is exhibited alone, and the synergistic effect is not obtained by combining with the component A.

Further, a microorganism for weeding, for example, Drechslera monoceras (strain MTB-951) can also be used in combination with the component A. A good herbicidal effect can also be obtained by mixing these two or more types.

In the herbicidal composition of the present invention, for example, Echinochloa oryzicola, Echinochlo crus-galli var. crus-galli, etc., which grows in one of the paddy fields, can be used as a herbaceous genus (Cyperus difformis), Cyperus flaccidus and other sedges, Monochoria vaginalis, Monochoria korsakowii and other waterweed weeds, grasses, Dopatrium junceum, etc. Eucalyptus weeds, Rotala indica, Ammannia multiflora and other gully weeds, Elatine triandra, and perennial weeds (Sagittaria pygmaea) and Alisma ( Sagittaria trifolia), such as Alisma, weed, Cyperus serotinus, Scirpus nipponicus, Eleocharis kuroguwai, Scirpus juncoides, Scirpus planiculmis, pine leaves Eleocharis acicularis), such as sedge weeds, Potamogeton distinctus, Oenanthe javanica, etc., and grassland, fields, orchards in the orchard, female genus, foxtail, gar. Poa annua), Xiong Rizhi (Eleu Sine indica), such as rice weed, Erigeron annuus, Erigeron philadelphicus, Erigeron floribundus, etc., Cyperus rotundus, otter (Ccyperus) Brevifolius), cypresses (Cyperus microiria), sedge weeds, Cerastium holosteoides, Stellaria media, etc., weeds, weeds, big dogs (polygonum), hooves and other weeds, Amaranthus viridis, Amaranthus lividus, etc., weeds, weeds (Commelina communis), Commelina benghalensis, etc. , Equisetum arvense, Equi-setum palustre, etc., weedy weeds, comfrey weeds, weeds, weeds, weeds, etc. The wide range of periods is prevented from being removed; it shows high safety relative to cultivated plants. Further, the "cultivated plant" herein includes a patient who is resistant to a herbicide or a herbicide group by a method of breeding or genetic factor engineering.

The herbicidal composition of the present invention varies depending on the target site, the target crop, the type of undesired weeds or weeds, the dispersion period, the dispersion method, the preparation type, etc., and the mixing ratio can be changed in a wide range according to the demand. The amount of distribution.

The blending ratio is generally 0.1 to 2,000 parts by mass, preferably 0.2 to 1,500 parts by mass, and most preferably 0.5 to 1,000 parts by mass, based on 1 part by mass of the component A. Cooperate.

Further, the herbicidal composition of the present invention may be mixed with an insecticide, a bactericide, other herbicides, a plant growth regulator, a microorganism, a fertilizer, etc., depending on the demand.

The herbicidal composition of the present invention can be used in its active ingredient itself, and can contain an additive component which is usually used in a pesticide preparation, depending on the demand.

The additive component includes a carrier such as a solid carrier or a liquid carrier, a surfactant, a binder, an adhesion-imparting agent, a viscosity-increasing agent, a coloring agent, an extender, a spreading agent, an antifreezing agent, an anti-solid agent, a breaker, and an anti-fouling agent. Decomposers and so on.

Others, preservatives, plant pieces, etc. may be used as an additive component depending on the needs.

The above solid carrier has natural minerals such as quartz, clay, kaolinite, pyrophyllite, sericite, talc, bentonite, acid white clay, attapulgite, zeolite, diatomaceous earth, calcium carbonate, ammonium sulfate, Inorganic salts such as sodium sulfate and potassium chloride; organic solid carriers such as citric acid, synthetic citrate, starch, cellulose, and plant powder; plastic carriers such as polyethylene, polypropylene, and polyvinylidene chloride. These may be used alone or in combination of two or more.

The liquid carrier is, for example, a monohydric alcohol such as methanol, ethanol, propanol, isopropanol or butanol, or ethylene glycol, diethylene glycol, propylene glycol, hexanediol, polyethylene glycol, polypropylene glycol, glycerol. Alcohols such as polyols; polyol compounds such as propylene glycol ether; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, and cyclohexanone; diethyl ether, dioxane, and ethylene glycol. Ethers such as diethyl ether, dipropyl ether and tetrahydrofuran; aliphatic hydrocarbons such as n-alkanes, naphthenes, isoalkanes, kerosenes, mineral oils; aromatics such as benzene, toluene, xylene, solvent naphtha, and alkylnaphthalene Hydrocarbons; halogenated hydrocarbons such as dichloroethane, chloroform, carbon tetrachloride; ethyl acetate, diisopropyl phthalate, dibutyl phthalate, dioctyl phthalate, hexane Esters such as dimethyl ester; lactones such as γ-butyrolactone; decylamines such as dimethylformamide, diethylformamide, dimethylacetamide, and N-alkylpyrrolidone; Such as nitriles; sulfur compounds such as dimethyl hydrazine; vegetable oils such as soybean oil, rapeseed oil, cottonseed oil, castor oil; water, and the like. These may be used alone or in combination of two or more.

Surfactants include, for example, sorbitan fatty acid esters, polyethylene oxide sorbitan fatty acid esters, sucrose fatty acid esters, polyethylene oxide fatty acid esters, polyethylene oxide resin esters, Polyethylene oxide fatty acid diester, polyethylene oxide alkyl ether, polyethylene oxide alkyl phenyl ether, polyethylene oxide dialkyl phenyl ether, polyethylene oxide alkyl phenyl Ether formaldehyde condensate, polyethylene oxide polypropylene oxide block polymer, alkyl polyethylene oxide polypropylene oxide block polymer ether, polyethylene oxide alkylamine, polyethylene oxide Fatty acid decylamine, polyethylene oxide fatty acid bisphenyl ether, polyalkylene oxide benzyl phenyl ether, polyalkylene oxide styryl phenyl ether, acetylene glycol, polyalkylene oxide addition acetylene glycol, Non-ionic surfactants such as polyoxyethylene ether type polyfluorene oxide, ester type polyfluorene oxide, fluorine-based surfactant, polyethylene oxide castor oil, polyethylene oxide hardened castor oil; Salt, polyethylene oxide alkyl ether sulfate, polyethylene oxide alkyl phenyl ether sulfate, polyethylene oxide styryl phenyl ether sulfate, alkyl benzene sulfonate a salt of a salt, a lignosulfonate, an alkylsulfosuccinate, a naphthalenesulfonate, an alkylnaphthalenesulfonate, a salt of a formaldehyde condensate of naphthalenesulfonic acid, a salt of a formaldehyde condensate of an alkylnaphthalenesulfonic acid, Anionic interfacial activity of fatty acid salts, polycarboxylates, N-methyl fatty acid sarcosinates, resinates, polyethylene oxide alkyl ether phosphates, polyethylene oxide alkyl phenyl ether phosphates (12) alkylamine hydrochloride, (octadecylalkylamine hydrochloride, oleylamine hydrochloride, (octadecyl)alkylamine acetate, (octadecyl)alkylaminopropyl A cationic surfactant such as an alkylamine salt such as a base amine acetate, an alkyltrimethylammonium chloride or an alkyldimethylbenzylammonium chloride; an amphoteric surfactant such as an amino acid type or a betaine type.

These surfactants may be used singly or in combination of two or more.

Adhesives or adhesion-imparting agents are, for example, carboxymethyl cellulose or a salt thereof, dextrin, water-soluble starch, tri-gum, guar gum, sucrose, polyvinylpyrrolidone, gum arabic, polyvinyl alcohol, Polyvinyl acetate, sodium polyacrylate, polyethylene glycol having an average molecular weight of 6,000 to 20,000, polyethylene oxide having an average molecular weight of 100,000 to 5,000,000, phospholipids (for example, cephalin, lecithin, etc.).

Examples of tackifiers include water-soluble polymers such as Sanxianjiao, guar gum, carboxymethylcellulose, polyvinylpyrrolidone, carboxyvinyl polymer, acrylic polymer, starch compound, and water-soluble polysaccharide. Inorganic fine powder such as high-purity bentonite and smoked cerium oxide.

Examples of the colorant include inorganic pigments such as iron oxide, titanium oxide, and Prussian blue; and organic dyes such as halogen dyes, azo dyes, and metal phthalocyanine dyes.

Examples of the extender include, for example, a polyoxynoxy surfactant, a cellulose powder, a dextrin, a processed starch, a polyaminocarboxylic acid tong compound, a crosslinked polyvinylpyrrolidone, a copolymer of maleic acid and styrene, A (meth)acrylic copolymer, a half ester of a polymer made of a polyhydric alcohol, a dicarboxylic acid anhydride, or a water-soluble salt of polystyrenesulfonic acid.

Exhibitors include, for example, paraffin wax, terpene, polyamide resin, polyacrylate, polyethylene oxide, wax, polyvinyl alkyl ether, alkylphenol formaldehyde condensate, synthetic resin emulsion, and the like.

Examples of the antifreezing agent include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, and glycerin.

The anti-solid agent includes, for example, polysaccharides such as starch, alginic acid, mannose, and galactose; polyvinylpyrrolidone, fumed ceria, ester gum, petroleum resin, and the like.

Examples of the breaker include, for example, sodium tripolyphosphate, sodium hexametaphosphate, metal stearate, cellulose powder, dextrin, methacrylate copolymer, polyvinylpyrrolidone, polyaminocarboxylic acid conjugate compound Sulfonated styrene. Isobutylene. Maleic anhydride copolymer, starch. Polyacrylonitrile graft copolymer and the like.

Examples of the anti-decomposition agent include desiccants such as zeolite, quicklime, and magnesia; and ultraviolet absorbers such as salicylic acid and benzophenone.

Examples of the preservative include potassium sorbate, 1,2-benzothiazolin-3-one, and the like.

Plant pieces are, for example, sawdust, coconut shells, maize cobs, tobacco stems, and the like.

When the herbicidal composition of the present invention contains the above-mentioned additive component, the content ratio thereof is usually 5 to 95%, preferably 20 to 90%, based on the mass; the surfactant is usually 0.1 to 30%, preferably It is 0.5~10%; other additives are 0.1~30%, preferably in the range of 0.5~10%.

The herbicidal composition of the present invention can be formulated into a liquid preparation, an emulsion, a hydrating agent, a powder, an oil agent, a granule hydrating agent, a flowable agent, a suspending agent, a granule, a microparticle, a giant agent, a suspension latex, and a micro Capsules and the like are used in a random dosage form.

In the case of formulation, it may also be used as a mixture with pesticides other than the components A and B, such as other herbicides, insecticides, fungicides, plant growth regulators, or fertilizers.

The herbicidal composition of the present invention may be directly applied at the time of use; or may be used by stem and leaf dispersion, soil application or surface application depending on the intended dilution concentration. Further, the herbicidal composition of the present invention may be used in advance in combination, or may be used in order according to the purpose.

The amount of the active ingredient in the preparation of the herbicidal composition of the present invention can be appropriately selected depending on the demand. When it is a powder, a microparticle, or a granule, it is 0.01 to 80 weight%, Preferably it is the range of 0.05-50 weight%. Further, in the case of an emulsion, a liquid agent, a flowable agent, a hydrating agent, and a particulate hydrating agent, it is selected in the range of 1 to 90% by weight, preferably 5 to 80% by weight.

The application amount of the herbicidal composition of the present invention varies depending on the kind of the active ingredient contained, the target weed, the tendency to produce, the environmental conditions, the dosage form of the preparation to be used, and the like.

In the case of powders, granules or granules, the active ingredient is selected from 0.1 g to 5 kg, preferably from 0.5 g to 1 kg, per 10 ares.

In the case of emulsions, liquids, flowables, hydrating agents or granule hydrating agents, when used in water dilution, the concentration of active ingredients used is generally selected from the range of 10 to 100,000 ppm.

[The best form for implementing the invention]

Next, the best mode of the present invention will be described by way of examples. The type of the active ingredient and the additive and the compounding ratio are not limited to these, and can be changed in a wide range. Further, the compound A-1 in the following examples is a pyrimisulfan compound of the compound of the general formula (I) wherein R ¹ is a methoxymethyl group. Namely, 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-6-methoxymethyl-N-difluoromethanesulfonylaniline.

In addition, the "part" in the following description is a mass part.

[Example 1]

Compound A-1 1 part by mass of Pyraclonil 7 parts by mass of polyethylene oxide octyl phenyl ether 0.5 parts by mass of β-naphthalenesulfonic acid formaldehyde condensate sodium salt 0.5 parts by mass of diatomaceous earth 20 parts by mass and 71 parts by mass of clay Mix and pulverize to obtain a hydrating agent.

[Example 2]

Compound A-1 1 part by mass Tefuryltrione 10 parts by mass of polyethylene oxide octyl phenyl ether 0.5 parts by mass β-naphthalenesulfonic acid formaldehyde condensate sodium salt 0.5 parts by mass of diatomaceous earth 20 parts by mass and 68 parts by mass of clay Mix and pulverize to obtain a hydrating agent.

[Example 3]

Compound A-1 1 part by mass of Mesotrion 10 parts by mass of polyethylene oxide octyl phenyl ether 0.5 parts by mass of β-naphthalenesulfonic acid formaldehyde condensate sodium salt 0.5 parts by mass of diatomaceous earth 20 parts by mass and calcium carbonate 68 mass The mixture is pulverized to obtain a hydrating agent.

[Example 4]

Compound A-1 10 parts by mass Tefuryltrione 10 parts by mass sodium lignin sulfonate 5 parts by mass Polyethylene oxide alkyl aryl ether 1 part by mass sodium polycarboxylate 3 parts by mass White carbon black 5 parts by mass Gelatinized starch 1 65 parts by mass of calcium carbonate and 10 parts by mass of water were kneaded and granulated. The obtained granules are dried in a fluidized bed dryer to obtain a granule hydrating agent.

[Example 5]

62.9 parts by mass of water, compound A-1, 5 parts by mass of Mesotrion, 15 parts by mass, sodium lignin sulfonate, 2 parts by mass, polyethylene oxide alkyl aryl ether sulfate, 4 parts by mass, polyethylene oxide alkyl aryl ether, 0.5 A mass fraction of 0.1 mass part of bentonite and 0.5 parts by mass of ethylene glycol and 10 parts by mass of ethylene glycol are mixed by a high-speed mixer, and pulverized by a wet pulverizer to obtain a flowable agent.

[Example 6]

Compound A-1 1 part by mass of Pyraclonil 7 parts by mass of talc and bentonite in a ratio of 1:3, 77 parts by mass of white carbon black, 10 parts by mass of surfactant, polyethylene oxide sorbitan alkylate 5 parts by mass of a mixture of a polyethylene oxide alkyl aryl polymer and an alkyl aryl sulfonate, and 10 parts by mass of water, which are kneaded into a paste and extruded from a sieve having a diameter of 1 mm. After drying, it is cut into a length of 0.5 to 1 mm to obtain a granule.

Next, the effects of the herbicidal composition of the present invention will be described by way of test examples.

[Test Example 1] (Testing the weeding effect in paddy fields)

Fill the paddy soil in 1/2000-acre plastic container, fertilize and mix, and sow field Eo (Echinochloa oryzoides), small water onion (Mo; Monochoria vaginalis), canine firefly (Sc; Scirpus juncoides), Various kinds of water bamboo leaves (An; Aneilema keisak), and buried the sedge (Cs; Cyperus serotinus) tubers in water depth of 1cm. Further, rice (Or) was transplanted in the same container and bred in a greenhouse. Thereafter, at the stage where the canine cockroach (Eo) reached the 2.5-leaf stage, it was submerged in water to a depth of 3 cm, and the amount of the hydrating agent prepared on the basis of Example 1 was diluted with water and applied to the surface of the water. Thereafter, the depth of the submerged water was maintained at a depth of 3 cm to be bred; the herbicidal effect and the degree of phytotoxicity on the 25th day of treatment were expressed as indices on the basis shown in Table 1. The results are shown in Table 2. Also, the dose is the amount of active ingredient per 10 acres.

[Test Example 2] (Testing the weeding effect in paddy fields)

Fill the paddy soil in 1/2000-acre plastic container, fertilize and mix, and sow the various species of Eo, Shui, Sc, and An. And the tuber of the sedge (Cs) is buried in a water depth of 1 cm. Further, rice (Or) was transplanted in the same container and bred in a greenhouse. Thereafter, in the stage where the dog bark (Eo) reached the 2-leaf stage, it was submerged in water to 10 cm, and the meristem of the MTB-951 strain was adjusted to 2.5 × 10 ^{10 10} / 10 hectares, which was mixed and prepared on the basis of Example 1. The hydrating agent of the compound A-1 was applied to the surface of the water in a dispersion liquid diluted with water. Thereafter, it was maintained at a depth of 10 cm in the submerged water to be bred. The herbicidal effect and the degree of phytotoxicity on the 25th day of treatment were expressed as indices on the basis shown in Table 1. The results are shown in Table 3. In the unit of the dose, the compound A-1 is "g ai/10a", and the MTB-951 strain is "one/10a".

[Test Example 3] (Testing the herbicidal effect of stem and leaf treatment in direct seeding fields)

Fill the paddy soil in a 1/10,000-acre plastic container, fertilize and mix, and sow rice (Or), canine (Ec; Echinochloa crus-galli var. crus-galli), and scorpion (Le; Lepochloa chinensis Nees) ), Cypress (Cy; Cyperus difformis) of various children. Thereafter, it is bred in a greenhouse; when rice (Or), canine (Ec), and sedge (Cy) reach the 4-leaf stage, and when the genus (Le) reaches the 5-6-leaf stage, it will be based on Example 1. The amount of the prepared hydrating agent was diluted with water, and the spreading agent surfactant was adjusted to 0.1% of the amount of the dispersed water in the compound A-1, and the whole plant body was subjected to stem and leaf treatment. Thereafter, after 2 days of treatment, the depth of the submerged water was 3 cm, and it was bred in a greenhouse; the herbicidal effect and the degree of phytotoxicity on the 30th day of treatment were expressed as indices on the basis shown in Table 1. The results are shown in Table 4. The dose is the amount of active ingredient per hectare.

[Test Example 4] (Testing the herbicidal effect by stem and leaf treatment)

Fill the dry soil with 1/10,000 acre of plastic containers, seed the seeds of Digitaria ciliaris, and feed the water from the bottom of the container. When it was cultivated in a greenhouse; when the stalked grass (Di) reached the 5-leaf stage, the amount of the hydrating agent prepared on the basis of Example 1 was diluted with water, and the whole plant body was subjected to stem and leaf treatment. Thereafter, it was bred in a glass chamber; the herbicidal effect and the degree of phytotoxicity on the 30th day after the treatment were expressed as indices on the basis of Table 1. The results are shown in Table 5. The dose is the amount of active ingredient per hectare.

[industrial use]

The herbicidal composition of the present invention is a compound selected from the group consisting of a difluoromethanesulfonylanilide compound or a salt thereof (ingredient A), and at least one selected from the group consisting of a specific herbicidal active compound and a herbicidal microorganism. The multiplication effect of (Component B) allows the herbicidal effect to appear early and quickly.

The herbicidal composition of the present invention has a broad spectrum of herbicidal spectrum with respect to weeds which are not expected to grow in the growth of cultivated plants; further, compared with the existing herbicides, the pot life of the chemical treatment is broad, and can be suppressed for a long period of time. The growth of undesired weeds does not cause phytotoxicity relative to cultivated plants, which contributes to the labor saving of cultivation and the increase of crop yield.

Claims (15)

A herbicidal composition comprising: (A) a compound (ingredient A) selected from the group consisting of a difluoromethanesulfonylanilide compound represented by the general formula (I) or a salt thereof (component A), and (B) selected from the group consisting of Pyraclonil, esprocarb, metamifop, triaziflam, 2,4-D, etobenzanid and at least one of the weeding microorganisms (ingredient B) are active ingredients (wherein R ¹ is methoxymethyl). For example, the herbicidal composition of claim 1 wherein component B is pyraclonil. For example, the herbicidal composition of claim 1 wherein component B is esprocarb. For example, the herbicidal composition of claim 1 wherein component B is metamifop. For example, the herbicidal composition of claim 1 wherein component B is triaziflam. For example, the herbicidal composition of claim 1 wherein component B is 2,4-D. For example, the herbicidal composition of claim 1 wherein component B is etobenzanid. The herbicidal composition of claim 1, wherein the component B is a microorganism for weeding. The herbicidal composition of claim 8, wherein the microorganism for weeding is Drechslera monoceras (MTB-951 strain). For example, the herbicidal composition of claim 1 wherein component B is blended in an amount of 0.1 to 2,000 parts with respect to 1 part of component A. A method for inhibiting the growth of undesirable weeds in a cultivated plant, characterized in that the herbicidal effective amount of the herbicidal composition according to any one of claims 1 to 10 is intended to grow a cultivated plant or The place where the cultivated plants grow is used. For example, in the method of claim 11, the herbicidal composition is used as a powder, a microparticle or a granule, and is applied in a range of 0.1 g to 5 kg per 10 hectares, based on the total amount of the component A and the component B. The method of claim 11, wherein the herbicidal composition is adjusted into an emulsion, a liquid, a flowable agent or a hydrating agent, and the total concentration of the component A and the component B is 10 to 100,000 ppm. The method of claim 11, wherein the cultivated plants are paddy crops, dry land crops, horticultural crops, dwarf grasses, fruit trees, and non-agricultural cultivated plants. The method of claim 11, wherein the place where the cultivated plant grows or the cultivated plant grows is a paddy field, a dry land, a short grassland or a non-agricultural land.