JP2007016023A - Fungicidal and herbicidal composition for paddy field and method for controlling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fungicidal and herbicidal composition for paddy field affording herbicidal effects and rice blast controlling effects over a long period and further synergistic effects on rice blast without exerting phytotoxicity on rice plants by application to the field after transplanting the paddy rice and to provide an energy-saving method for controlling. <P>SOLUTION: The fungicidal and herbicidal composition for the paddy field comprises one or two or more kinds of compounds selected from compounds having a control activity against the rice blast and one or two ore more kinds of compounds selected from compounds having a herbicidal activity. The compounds having especially the control activity against the rice blast are preferably probenazole, tiadinil, orysastrobin and N-(2-cyanophenyl)-3,4-dichloroisothiazole-5-carboxamide. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sterilizing herbicidal composition for paddy fields and a labor-saving control method that have a synergistic effect on rice blast and can simultaneously control rice blast and paddy weeds.

For the control of paddy field weeds, control by a so-called one-time treatment agent, which is effective only by treating once a few days after rice transplantation, has become the mainstream. On the other hand, the control of rice blast disease is carried out by a treatment system using a box treatment agent applied to a seedling box and a Honda treatment agent treated about 30 to 50 days after transplanting rice alone or in combination. It was difficult to control at the same time by mixing the treatment agent and rice blast control agent. Under such circumstances, a sterilized herbicidal composition for paddy fields for the purpose of labor-saving control by containing a compound having a controlling effect on rice blast and a compound having herbicidal activity is known. (For example, refer to Patent Documents 1 to 5.)
JP-A-11-222406 JP 11-310507 A JP 2002-145709 A JP 2002-114612 A JP 2003-95832 A

  However, in the above prior art methods, the combination of a compound having a control effect on rice blast and a compound having a herbicidal activity is not appropriate, and when simultaneous treatment is carried out, the phytotoxicity of paddy rice is enhanced, and the rice blast control effect Moreover, due to problems such as insufficient herbicidal effects, practical application has been difficult.

  As a result of intensive studies to solve the above problems, the present inventors have applied a Honda after transplanting rice by combining a compound having a control effect against a specific rice blast and a compound having a specific herbicidal activity. The present inventors have found that a long-term herbicidal effect and rice blast control effect can be obtained without causing phytotoxicity to paddy rice, and that the present invention has a synergistic effect on rice blast.

That is, the present invention
(1) containing one or more compounds selected from compounds having a control activity against rice blast and one or more compounds selected from compounds having a herbicidal activity Paddy field sterilization herbicidal composition,
(2) One or two compounds wherein the compound having control activity against rice blast is selected from probenazole, thiazinyl, orisatrobin and N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide The sterilizing herbicidal composition for paddy fields according to (1), which is the above compound,
(3) Compounds having herbicidal activity are bensulfuron methyl, azimusulfuron, pyrazosulfuron ethyl, imazosulfuron, sinosulfuron, cyclosulfamuron, indanophan, cyhalohop butyl, tenyl chlor, esprocarb, etobenzanide, fenfentrol, chromeprop, dimetamethrin, diimron 1 or 2 or more selected from oxadichromemephone, bifenox, bifenox, pyributycarb, pyriminobac, pyriftalide, pretilachlor, bromobutide, benzofenap, beniocurve, pentoxazone, benfrate, mefenacet, fentolazamide, pyraclonyl, benzobicyclon, sulcotrione and mesotrione The sterilizing herbicidal composition for paddy fields according to (1), which is a compound,

(4) One or more compounds wherein the compound having herbicidal activity is selected from bensulfuron methyl, pyrazosulfuron ethyl, indanophan, cyhalohop butyl, eprocarb, clomeprop, dimetamethrin, oxadiclomephone, pretilachlor, beniocarb, mefenacet and fentolazamide A sterilizing herbicidal composition for paddy fields according to (1),
(5) The compound according to any one of (1) to (4), wherein the compound having herbicidal activity is contained in a proportion of 0.0001 to 10 parts by weight with respect to 1 part by weight of the compound having control activity against rice blast. Sterilizing herbicidal composition for paddy field,
(6) The simultaneous use of rice blast and paddy weed characterized by treating the paddy field sterilizing herbicidal composition according to any one of (1) to (5) in a range of 100 g to 10 kg per 10 ares after transplanting rice Control method,

(7) A fungicidal composition containing one or more compounds selected from compounds having a control activity against rice blast, and bensulfuron methyl, azimusulfuron, pyrazosulfuron ethyl, imazosulfuron, and sinosulfuron , Cyclosulfamlone, Indanophan, Cyhalohop Butyl, Tenilchlor, Esprocarb, Etobenzanide, Cavenprole, Chlomeprop, Dimetamethrin, Dimetron, Oxadichromene, Bifenox, Pyributicarb, Pyriminoback, Pyriphthalide, Pretilachlor, Bromobutide, Benzofeneto , Mefenacet, fentolazamide, pyraclonyl, benzobicyclone, sulcotrione and mesotrione One or simultaneous method for controlling rice blast and paddy weeds, characterized in that the herbicidal composition containing the two or more compounds simultaneously processed after rice transplantation that,
(8) One or two compounds wherein the compound having control activity against rice blast is selected from probenazole, thiazinyl, orisatrobin and N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide The present invention relates to a method for simultaneously controlling rice blast and rice field weeds as described in (7).

  The present invention is a pasteurization for paddy rice that has a long-term herbicidal effect and a rice blast control effect, and has a synergistic effect on rice blast disease without causing phytotoxicity to paddy rice by applying the rice field after transplanting rice. A herbicidal composition and a labor-saving control method are provided.

  Provenazole, tiadinil, and orysastrobin, which are compounds having an activity of controlling rice blast of the present invention, are known in the literature (for example, The Pesticide Manual 3 edition). ), Shibuya Narumi, and three others, “SHIBUYA INDEX-2005-10th Edition”, SHIBUYA INDEX Study Group, etc.). N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide is a compound described in JP-T-2001-522840 (Production Example No. 1), and induces resistance in rice. It has been described that it has a controlling activity against rice blast. Therefore, N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide is very similar to thiazinyl and probenazole in inducing resistance to rice and controlling blast disease. It can be regarded as a compound having a mechanism, and it can be expected to have the same effect in the combined use with the herbicide which is a constitution of the present invention. The compound having a control activity against rice blast of the present invention exhibits a good rice blast control effect and herbicidal effect in combination with a compound having many herbicidal activities.

The compound having herbicidal activity of the present invention may be any compound that can be used as a herbicide for paddy fields, such as bensulfuron-methyl, azimsulfuron, pyrazosulfuron-ethyl, and imazosulfuron. (Imazosulfuron), cynosulfuron, cyclosulfamuron, indanophan, cyhalofop-butyl, tenrochlor, tenrochlor. ), Clomeprop (clomeprop), dimethametryn (dimethametryn), daimuron (daimuron), oxaziclomefone (oxaziclomefone), bifenox (bifenox), Pyributicarb (pyributicarb), pyriminobac (pyriminobac), pyriftalid (pyriftalid), pretilachlor (pretilachlor), bromobutide (bromobutide ), Benzofenap, benthiocarb, pentoxazone, benfrateate, mefenacet, fentrazamide , Pyraclonil, benzobicyclon, sulcotrione and mesotrione, particularly preferably bensulfuronmethyl, pyrazosulfuronethyl, indanophan, cihalohopbutyl, esprocarb dimethroprop, Oxadichromemephone, pretilachlor, beniocarb, mefenacet and fentolazamide.
These are described in known literatures (for example, known compounds in The Pesticide Manual manual Edition 2003), Narumi Shibuya, three others, “SHIBUYA INDEX-2005-10th Edition”, SHIBUYA INDEX Study Group, etc. It is.

The compounding ratio of the active ingredient in the paddy field sterilization herbicidal composition of the present invention is 0.1 to 30 parts by weight of a compound having a control activity against rice blast in 100 parts by weight of paddy field sterilization herbicidal composition. Yes, preferably in the range of 1 to 10 parts by weight, and the compound having herbicidal activity is in the range of 0.01 to 20 parts by weight, preferably in the range of 0.1 to 10 parts by weight. In addition, the ratio of the compound having the herbicidal activity to the compound having the herbicidal activity against the rice blast disease is 0.0001% of the compound having the herbicidal activity relative to 1 part by weight of the compound having the herbicidal activity against rice blast. The range is from 10 to 10 parts by weight, preferably from 0.001 to 1 part by weight.
The paddy field sterilizing herbicidal composition of the present invention is generally used in a form convenient for use according to a conventional method for agricultural chemical preparations. That is, the active ingredient is mixed with an appropriate inert carrier or, if necessary, together with an auxiliary agent in an appropriate ratio to be dissolved, separated, suspended, mixed, impregnated, adsorbed or adhered to an appropriate dosage form, For example, it may be used after being formulated into a suspension, emulsion, liquid, wettable powder, wettable granule, granule, powder, tablet, pack, microcapsule and the like.

  Moreover, the compound which has a control activity with respect to a rice blast disease, and the compound which has a herbicidal activity can be made into a respectively different preparation, they can be mixed previously, and the bactericidal herbicidal composition for paddy fields of this invention can also be manufactured. In such a mixed preparation, it is preferable to mix preparations of the same form (for example, a mixture of wettable powder and wettable powder, a mixture of emulsion and emulsion, a mixture of granules and granules, etc.). Any combination that does not cause inconvenience is not particularly limited.

  The inert carrier that can be used in the present invention may be either solid or liquid. Examples of materials that can be used as a solid carrier include soybean flour, cereal flour, wood flour, bark flour, saw flour, and tobacco stem flour. , Walnut shell powder, bran, fiber powder, residue after extraction of plant extract, synthetic polymer such as ground synthetic resin, clays (eg kaolin, bentonite, acid clay), talc (eg talc, pyrophyllite, etc.), Silicas {for example, diatomaceous earth, silica sand, mica, white carbon (some synthetic high-dispersion silicic acid called water-containing fine silicon and water-containing silicic acid, and some products contain calcium silicate as a main component)}, activated carbon, sulfur powder, pumice, Firing diatomaceous earth, brick ground, fly ash, sand, calcium carbonate, calcium phosphate and other inorganic mineral powders, polyethylene, polypropylene, polychlorinated Plastic carriers such as vinylidene, ammonium sulfate, ammonium phosphate, ammonium nitrate, urea, fertilizer salts depreciation etc., can be exemplified compost or the like, which are used alone or in the form of a mixture of two or more.

  The material that can be used as a liquid carrier is selected from those having solvent ability itself, and those that can disperse an active ingredient compound with the aid of an auxiliary agent without having solvent ability. Examples of the carriers listed above are used alone or in the form of a mixture of two or more thereof, for example, water, alcohols (eg, methanol, ethanol, isopropanol, butanol, ethylene glycol, etc.), ketones (eg, acetone, Methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, etc.), ethers (eg, diethyl ether, dioxane, cellosolve, dipropyl ether, tetrahydrofuran, etc.), aliphatic hydrocarbons (eg, kerosene, mineral oil, etc.), aromatic hydrocarbons (E.g. benzene, toluene, Silene, solvent naphtha, alkylnaphthalene, etc.), halogenated hydrocarbons (eg, dichloroethane, chloroform, carbon tetrachloride, chlorobenzene, etc.), esters (eg, ethyl acetate, diisopropylpropyl phthalate, dibutyl phthalate, dioctyl phthalate, etc.) ), Amides (eg, dimethylformamide, diethylformamide, dimethylacetamide, etc.), nitriles (eg, acetonitrile, etc.), dimethyl sulfoxides, and the like.

As other adjuvants, the following typical adjuvants can be mentioned, and these adjuvants are used depending on the purpose and are used alone, or in some cases, two or more kinds of adjuvants are used together. In some cases it is possible to use no adjuvants at all.
Surfactants are used for the purpose of emulsifying, dispersing, solubilizing and / or wetting of the active ingredient compound, such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene higher fatty acid ester, polyoxyethylene. Examples include surfactants such as resin acid esters, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monooleate, alkylaryl sulfonates, naphthalene sulfonic acid condensates, lignin sulfonates, and higher alcohol sulfates. it can.
For the purpose of stabilizing the dispersion, sticking and / or binding of the active ingredient compound, for example, casein, gelatin, starch, methylcellulose, carboxymethylcellulose, gum arabic, polyvinyl alcohol, pine oil, coconut oil, bentonite, lignin sulfonate It is also possible to use auxiliary agents such as

In order to improve the fluidity of solid products, for example, auxiliary agents such as waxes, stearates and alkyl phosphates can be used.
As a peptizer for the suspension product, for example, auxiliary agents such as naphthalenesulfonic acid condensate and condensed phosphate can be used.
As the antifoaming agent, for example, an auxiliary agent such as silicone oil can be used.
As a preservative, 1,2-benzisothiazolin-3-one, parachlorometaxylenol, butyl paraoxybenzoate and the like can be added.
Furthermore, functional spreading agents, activity enhancers such as metabolic degradation inhibitors such as piperonyl butoxide, antifreezing agents such as propylene glycol, antioxidants such as BHT, UV absorbers and other additives as necessary Agents can also be added.

  When using the paddy field sterilization herbicidal composition of the present invention, the effective amount for controlling rice blast and weeds is used in the paddy field after rice transplantation as it is, or diluted or suspended appropriately with water or the like. For example, it can be used by applying to the surface of Honda, spraying on foliage, treating to soil, etc. and absorbing it from the root, the application amount is the mixing ratio of active ingredients, weather conditions, formulation form, application method Depending on the weed species to be controlled, etc., the amount of each active ingredient per 10 are usually in the range of 1-1000 g, preferably in the range of 10-500 g. When applying emulsions, wettable powders, liquids, flowables, etc. diluted with water, the concentration of each active ingredient is in the range of 0.00001-0.1%, and granules, powders, etc. are not diluted. The flowable agent may be used as it is without being diluted. When a fungicide containing a compound having a control activity against rice blast as an active ingredient and a herbicide containing a compound having a herbicidal activity as an active ingredient are treated at the same time after transplanting rice, for example, 10 are for granules. If it is a flowable agent in the range of 500 g to 5 kg, it is possible to simultaneously control rice blast and weeds by treating in the range of 250 ml to 1 L.

Moreover, the effect of the present invention is also exhibited by using a compound having a control activity against rice blast and a compound having a herbicidal activity as separate preparations, and simultaneously using these effective amounts in paddy fields after rice transplantation. be able to. An effective amount for controlling rice blast and weeds may be used in the rice field after transplanting rice in the form of each formulation as it is or diluted or suspended as appropriate with water or the like. It can be used after being applied to the soil, treated on soil, etc. and absorbed from the roots. The application amount varies depending on the mixing ratio of active ingredients, weather conditions, formulation form, application method, weed species to be controlled, etc., but in the case of a compound having control activity against rice blast, the amount of active ingredient per 10 ares is 1 In the case of a compound having herbicidal activity, it is in the range of 1 to 500 g as an active ingredient per 10 ares, preferably in the range of 5 to 100 g. is there.
The treatment time in the paddy field sterilization herbicidal composition of the present invention and the rice blast and weed simultaneous control method depends on the type of active ingredient, weather conditions, formulation, application method, weed species to be controlled, etc. Immediately after that, it may be within 30 days, preferably immediately after rice transplantation within 20 days, more preferably within 15 days immediately after rice transplantation.

  The sterilized herbicidal composition for paddy fields of the present invention exhibits a controlling effect against rice blast (Magnaporthe grisea (Pyricularia oryzae)) and also exhibits a herbicidal effect against various weeds, for example, Echinochloa crus- (galli), Ezonosayanukagusa (Leersia oryzoides), Echinochloa oryzicola, Kurowai (Eleocharis kuroguwai), Scirpus planiculmis, Shirui (Scirpus nipponicus), Cyperus puss Azena (Lindernia procumbens), Abnomome (Dopatrium junceum), American Azena (Lindernia dubia), Urikawa (Sagittaria pygmaea), Omodaka (Sagittaria trifolia), Kakishigusa (Rotala indica), Konagi (Monochoria vaginalis), floret (A) Potamogeton distinctus), Hera modalis (Alisma canaliculatum), Mizuaoi (Monochoria korsakowii), Mi Chickweed (Elatine triandra), can be exemplified weeds such as duckweed (Spirodela polyrhiza). Although the typical Example and test example of this invention are shown below, this invention is not limited to these. In the examples, parts represent parts by weight.

Formulation Example 1
Thiazinyl 6.0 parts, Indanophan 0.47 parts, Chlomeprop 1.2 parts, Bensulfuron methyl 0.25 parts, Polyoxyethylene nonyl phenyl ether 0.4 parts, Polyvinyl alcohol 2.0 parts, Synthetic hydrous silicic acid 1.0 And 88.68 parts of kaolin clay were mixed and ground uniformly, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Formulation Example 2
Probenazole 8.0 parts, Oxadichromene 0.27 parts, Chlomeprop 1.2 parts, Bensulfuron methyl 0.25 parts, Polyoxyethylene nonylphenyl ether 0.4 parts, Polyvinyl alcohol 2.0 parts, Synthetic hydrous silicic acid 1.0 And 86.88 parts of kaolin clay were uniformly mixed and pulverized, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Formulation Example 3
3.3 parts of orysastrobin, 0.67 part of fentolazamide, 0.25 part of bensulfuron methyl, 0.4 part of polyoxyethylene nonylphenyl ether, 2.0 parts of polyvinyl alcohol, 1.0 part of synthetic hydrous silicic acid and kaolin clay 92. 38 parts were uniformly mixed and pulverized, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Formulation Example 4
Thiazinyl 6.0 parts, Cihalohop butyl 0.6 parts, Dimetamethrin 0.2 parts, Pyrazosulfuron ethyl 0.1 parts, Pretilachlor 1.5 parts, Dioctyl sulfosuccinate 0.5 parts, Polycarboxylic acid soda 2 0.0 part, 30.0 parts of bentonite, 1.0 part of sodium carbonate and 58.1 parts of calcium carbonate were uniformly mixed and ground, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Formulation Example 5
Probenazole 8.0 parts, Esprocarb 5.0 parts, Dimetamethrin 0.2 parts, Pyrazosulfuron ethyl 0.1 parts, Pretilachlor 1.5 parts, Dioctyl sulfosuccinate 0.5 parts, Polycarboxylic acid soda 2.0 parts 30.0 parts of bentonite, 1.0 part of sodium carbonate and 51.7 parts of calcium carbonate were uniformly mixed and ground, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Formulation Example 6
3.3 parts of orysastrobin, 5.0 parts of beniocarb, 0.25 parts of bensulfuron methyl, 1.5 parts of mefenacet, 0.5 parts of dioctylsulfosuccinate, 2.0 parts of sodium polycarboxylate, 30.0 parts of bentonite, 1.0 part of sodium carbonate and 56.45 parts of calcium carbonate were uniformly mixed and pulverized, kneaded with an appropriate amount of water, granulated and dried to obtain granules.

Test Example 1 Control Effect Test for Rice Blast Disease In a greenhouse, 3 to 3.5 leaf-stage paddy rice was transplanted into a 1/5000 arepot, and a prescribed drug prepared according to the method shown in the preparation example 5 days after transplanting The amount was applied to the water surface. Seven days after the treatment, the diseased rice was placed in a greenhouse and continuously infected with blast fungus. The number of disease groups was investigated 8 days after infection, and the control value was calculated from the following formula. At the same time, the rice damage was investigated. The phytotoxicity is determined by naked eye judgment, and “-” indicates no phytotoxicity. The results are shown in Table 1.
Control value = (1−number of lesions in the drug-treated group / number of lesions in the untreated group) × 100

Test Example 2 Herbicidal effect on Inhibibies and Indo-hotarui Incubating Inoubie and Into-firefly in a 1/5000 Earl pot placed outdoors and keeping the water depth 5 cm. On the day after sowing, a predetermined amount of a drug prepared according to the method shown in the preparation examples was applied to the surface of the water. After 56 days of drug treatment, a naked eye judgment (0: no reaction to 100: complete death) was performed. The results are shown in Table 1.

  From the results of Test Example 1 and Test Example 2, the paddy field disinfectant herbicidal composition of the present invention has an increased control effect on rice blast compared to the case where a compound having control activity against rice blast is used alone. In addition, the herbicidal effect was exhibited without impairing the effect of the herbicide, and no phytotoxicity was observed in the rice.

Claims (8)

  It contains one or more compounds selected from compounds having control activity against rice blast and one or more compounds selected from compounds having herbicidal activity Sterilization herbicidal composition for paddy fields.   One or more compounds in which the compound having a controlling activity against rice blast is selected from probenazole, thiazinyl, orisatrobin and N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide The sterilized herbicidal composition for paddy fields according to claim 1.   Compounds having herbicidal activity are bensulfuron methyl, azimusulfuron, pyrazosulfuron ethyl, imazosulfuron, sinosulfuron, cyclosulfamuron, indanophan, cihalohop butyl, tenyl chlor, eprocarb, ettobenzanide, kafenthrol, clomeprop, dimetamethrin, dimimtron, oxadiclomephone, One or more compounds selected from bifenox, pyributycarb, pyriminobac, pyriftalide, pretilachlor, bromobutide, benzophenap, beniocurve, pentoxazone, benfrate, mefenacet, fentolazamide, pyraclonyl, benzobicyclone, sulcotrione and mesotrione The sterilizing herbicidal composition for paddy fields according to claim 1.   The compound having herbicidal activity is one or more compounds selected from bensulfuron methyl, pyrazosulfuron ethyl, indanophan, cyhalohop butyl, eprocarb, clomeprop, dimetamethrin, oxadiclomephone, pretilachlor, beniocarb, mefenacet and fentrazamide. The sterilized herbicidal composition for paddy fields according to claim 1.   The paddy field according to any one of claims 1 to 4, comprising a compound having herbicidal activity in a proportion of 0.0001 to 10 parts by weight with respect to 1 part by weight of the compound having control activity against rice blast. Bactericidal herbicidal composition.   A method for simultaneously controlling rice blast and paddy weed, characterized in that the pasteurized herbicidal composition for paddy field according to any one of claims 1 to 5 is treated in the range of 100 g to 10 kg per 10 ares after transplanting paddy rice.   A fungicidal composition containing one or more compounds selected from compounds having a control activity against rice blast, bensulfuron methyl, azimusulfuron, pyrazosulfuron ethyl, imazosulfuron, synosulfuron, cyclosulfur Famron, Indanophan, Cihalohop Butyl, Tenilchlor, Esprocarb, Etobenzanide, Cavenstrol, Chlomeprop, Dimetamethrin, Daimron, Oxadichrome, Bifenox, Pyributicarb, Pyriminobac, Pyriphthalide, Pretilachlor, Bromotide, Benzofenato Benzofeneto Pentobento 1 selected from fentolazamide, pyraclonyl, benzobicyclon, sulcotrione and mesotrione Or rice blast and simultaneous method for controlling paddy weeds, characterized in that the herbicidal composition containing the two or more compounds simultaneously processed after rice transplantation.   One or more compounds in which the compound having a controlling activity against rice blast is selected from probenazole, thiazinyl, orisatrobin and N- (2-cyanophenyl) -3,4-dichloroisothiazole-5-carboxamide The method for simultaneously controlling rice blast and rice field weeds according to claim 7.