JP2005502717A - Herbicidal composition - Google Patents

Abstract

In addition to containing the usual inert formulation adjuvant, oxadiargyl, oxadiazone, phentolazamide, ethoxysulfuron, quinchlorac, pyrazolate, amicarbazone, bromobutide, carfentrazone (-ethyl), pyrizoleate, pyraflufen (-ethyl) as active ingredients , Sulfentrazone, Tepraloxydim, Clozinahop-propargyl, Pretilachlor, Butachlor, Oxadiclomephone, Fentrazamide, Benzobicyclone, Molinate, Quinchlorac, Ventazone, Pyrazolinate, Pentoxazone, Metamihop, Sinosulfuron, Imazosulfuron, Pyrazosulfuron (-ethyl) Ruflon, bensulfuron (-methyl), trisulfuron, prosulfuron, halosulfuro A mixture of at least two compounds selected from the group consisting of (-methyl), sulfometuron (-methyl), sulfosulfuron, chlorimuron (-ethyl), cyclosulfamuron, tritosulfuron and iodosulfuron A synergistic herbicidal composition comprising:

Description

【Technical field】
[0001]
The present invention relates to a novel synergistic herbicidal composition comprising a combination of herbicidally active ingredients suitable for selectively controlling weeds in useful plant crops such as rice crops.
[0002]
The invention also relates to a method for controlling weeds in crops of useful plants and the use of the novel composition for that purpose.
[Background]
[0003]
Oxadialgyl, oxadiazone, fentolazamide, ethoxysulfuron, quinchlorac, pyrazolate, amicarbazone, bromobutide, carfentrazone (-ethyl), pyrizoleate, pyraflufen (-ethyl), sulfentrazone, tepraloxydim, clodinahop-propargyl, pretilachlor , Butachlor, oxadichromemephone, fentolazamide, benzobicyclone, molinate, quinclolac, bentazone, pyrazolinate, pentoxazone, sinosulfurone, imazosulfuron, pyrazosulfuron (-ethyl), azimusulfuron, bensulfuron (-methyl), trisulfuron, prosulfuron, halosulfuron (-Methyl), sulfometuron (-methyl), sulfosulfuron, chlorimuron - ethyl), cycloalkyl sul Pham Ron, compounds such tritosulfuron and iodosulfuron, for example "The Pesticide Manual" 12th edition (BCPC), shows a herbicidal activity, such as described in 2000. The herbicidal activity of metamihop is known, for example, from WO 00/05956.
[0004]
Surprisingly, currently a combination of variable amounts of at least two active ingredients from the above list does not cause significant damage to useful plants, and most of the weeds that occur particularly in useful plant crops, It has been discovered that it exhibits a synergistic effect that can be controlled both before and after emergence.
DISCLOSURE OF THE INVENTION
[0005]
Thus, according to the present invention, in addition to including the usual inert formulation adjuvant, as active ingredients oxadialgyl, oxadiazone, phentolazamide, ethoxysulfuron, quinchlorac, pyrazolate, amicarbazone, bromobutide, carfentrazone (-ethyl), Pyrizolate, pyraflufen (-ethyl), sulfentrazone, tepraloxydim, clodinahop-propargyl, pretilachlor, butachlor, oxadiclomephone, fentrazamide, benzobicyclone, molinate, quinchlorac, bentazone, pyrazolinate, pentoxazone, metamihop, synosulfuron, imazosulfuron Pyrazosulfuron (-ethyl), azimusulfuron, bensulfuron (-methyl), trisulfuron, pro At least two compounds selected from the group of ruflon, halosulfuron (-methyl), sulfometuron (-methyl), sulfosulfuron, chlorimuron (-ethyl), cyclosulfamuron, tritosulfuron and iodosulfuron A novel synergistic herbicidal composition for selective weed control comprising a mixture is provided.
[0006]
It is quite surprising that the combination of these active ingredients exceeds the additive action on the controlled weeds in principle and thus expands the range of action of the two active ingredients, especially in the following two ways: It is. That is, first of all, the application rate of the individual compounds is reduced while maintaining an excellent level of action. Secondly, the composition according to the invention achieves a high level of weed control even in the case where the individual substances have lost their utility from a crop standpoint within a low application rate range. As a result, the range of weeds has increased significantly and the selectivity for useful plant crops has increased further, as is necessary and desirable when the active ingredient is unintentionally over-applied. The composition according to the present invention also allows for greater flexibility in continuing crops while retaining excellent control of weeds in useful plants.
[0007]
Compositions in accordance with the present invention are numerous such as echinochlor, syrupus, monocholia, sagittalia, lindonia, ludwigia, eleocaris, allopecrus, sorghum halepens, rotovoarea, brachiaria, setaria, leptochlor, ciperas, abtilon, fern, xanthium and ipomoea. Can be used against agronomically important weeds. The composition according to the invention is suitable for all spraying methods conventionally used in agriculture, for example pre-emergence spraying, post-emergence spraying and seed dressing. The composition according to the invention is particularly suitable for controlling weeds in rice. The term “useful plant crop” should be understood to include those that have become tolerant to herbicides or certain types of herbicides as a result of conventional breeding or genetic engineering methods. It is.
[0008]
The composition according to the present invention comprises the active ingredient in any mixing ratio, but usually the other component is in excess of one component. The preferred mixing ratio of the active ingredients is 10: 1 to 1:10, preferably 5: 1 to 1: 5, in particular 1: 1.
[0009]
The following combinations have proven to be particularly effective compositions: ethoxysulfuron + oxadiazone, ethoxysulfuron + oxadialgyl, ethoxysulfuron + oxadichromemephone, ethoxysulfuron + fentrazamide and ethoxysulfuron + quinchlorac. Further preferred herbicidal compositions according to the present invention comprise the following combinations: fentolazamide + oxadiazone, fentolazamide + oxadialgyl and fentrazamide + oxadichromemephone, oxadialgyl + oxadiazone, oxadialgyl + oxadichromemephone, oxadialgyl + quinclolac, oxadiazone + oxadichromemephone, oxadiazone + quin Lac and oxadichromemephone + quinchlorac, and similarly pyrazolate + oxadiazone, pyrazolate + oxadiargyl, pyrazolate + oxadichromemephone, pyrazolate + phentolazamide and pyrazolate + quinchlorac, metamihop + clodinahop-propargyl, metamihop + pretilachlor, metamihop + butachlor, meta Hop + Oxadichrome, Metamihop + Fentrazamide, Metamihop + Bromobutide, Metamihop + Benzobicyclone, Metamihop + Molinate, Metamihop + Kinclolac, Metamihop + Bentazone, or Metamihop + Clodinahop-Propargyl, Metamihop + Pretilachlor, Metamihop + Butachlor, Metamihop + Butachlor Metamihop + phentolazamide, Metamihop + bromobutide, Metamihop + benzobicyclone, Metamihop + molinate, Metamihop + quinclolac, Metamihop + Bentazone and synosulfuron, Imazosulfuron, pyrazosulfuron (-ethyl), Azimusulfuron, Bensulfuron (-methyl), Triasulfuron, Prosulfuron, Ha One or more urea compounds selected from sulfurone (-methyl), sulfometuron (-methyl), sulfosulfuron, chlorimuron (-ethyl), cyclosulfamlone, tritosulfuron, iodosulfuron and bensulfuron; Or a compound selected from metamihop, carfentrazone, benzobicyclone, bromobutide, amicarbazone, clodinahop-propargyl, pretilachlor, butachlor, oxadiclomephone, fentrazamide, bromobutide, benzobicyclone, molinate, quinchlorac and bentazone And Sinosulfuron, Imazosulfuron, Pyrazosulfuron (-ethyl), Azimusulfuron, Bensulfuron (-methyl), Triasulfuron, Prosulfuron, Halosulfuron (- methyl), sulfometuron (- methyl), sulfosulfuron, chlorimuron (- ethyl), cycloalkyl sul Pham Ron, a mixture of one or more urea compounds selected from among tritosulfuron and iodosulfuron.
[0010]
Application rates can vary within wide limits, including soil properties, application methods (before or after emergence; seed dressing; application to the mushrooms; application without moistening), crop plants, It depends on the weeds to be controlled, the general climatic conditions and other factors governed by the application method, the application time and the target crop. The active ingredient mixture according to the invention can generally be sprayed at a rate of 0.1 to 3.0 kg active ingredient mixture per ha.
[0011]
The mixtures according to the invention are available in unmodified form, i.e. as obtained in the synthesis. Preferably, however, they are customary as described in, for example, WO 97/34483, p9-13, together with adjuvants conventionally used in pharmaceutical technology such as solvents, solid carriers or surfactants. In the form of emulsions, directly sprayable or dilutable solutions, wettable powders, soluble powders, powders, granules or microcapsules. As with the nature of the composition, spraying methods such as spraying, atomization, dusting, humidification, scattering or pouring are selected according to the intended goals and general circumstances. As with formulations, ie, mixtures according to the present invention, media, preparations or compositions containing solid or liquid formulation adjuvants, where applicable, are closely mixed with the formulation adjuvant, eg, solvent or solid carrier, and the active ingredient. It is prepared in a manner known per se by mixing and / or grinding. Furthermore, a surface active compound (surfactant) can also be used in preparation of a formulation.
[0012]
Examples of solvents and solid carriers are described, for example, on page 97 of WO 97/34485. Depending on the nature of the active ingredient to be formulated, suitable surfactant compounds are nonionic, cationic and / or anionic surfactants and surfactant mixtures with excellent emulsifying, dispersing and hydrating properties. Examples of suitable anionic, nonionic, and cationic surfactants are listed, for example, on WO 97/34485, pages 7 and 8. Likewise suitable for the preparation of the herbicidal composition according to the invention is the McCatchcheon Detergent and Emulsifier Yearbook, MC Publishing Corp., Rldgewood New Jersey, 1981, Stache, H., “Tensid-Taschenbuch ”, Carl Hanser Verlag, Munich / Vienna, 1981 and M. and J. Ash,“ Surfactant Encyclopedia of Surfactants ”, Volume I-III, Chemical Publishing Co., New York, 1980-81. A surfactant conventionally used in the art.
[0013]
Herbicidal formulations are usually 0.1-99% by weight, in particular 0.1-95% by weight of the active ingredient mixture, 1-99.9% by weight of a solid or liquid formulation adjuvant, and 0-25% by weight, in particular 0%. 0.1 to 25% by weight of surfactant.
[0014]
Commercial products are usually formulated as concentrates, while end users typically use dilute formulations. The composition can also be further stabilized with a stabilizer such as vegetable oil or epoxidized vegetable oil (epoxidized coconut oil, rapeseed oil or soybean oil), antifoaming agent such as silicone oil, preservative, viscosity modifier, binder, adhesive. Additional ingredients such as imparting agents, as well as fertilizers or other active ingredients may also be included. Preferred formulations have in particular the following composition:
(% = Weight percent)
emulsion:
Active ingredient mixture 1-90%, preferably 5-20%
Surfactant 1-30%, preferably 10-20%
Liquid carrier 5 to 94%, preferably 70 to 85%
Powder:
Active ingredient mixture 0.1-10%, preferably 0.1-5%
Solid support 99.9-90%, preferably 99.9-99%
Flowable active ingredient mixture 5-75%, preferably 10-50%
Water 94-24%, preferably 88-30%
1-40% surfactant, preferably 2-30%
Wettable powder:
Active ingredient mixture 0.5-90%, preferably 1-80%
Surfactant 0.5-20%, preferably 1-15%
Solid support 5 to 95%, preferably 15 to 90%
Granule:
Active ingredient mixture 0.1-30%, preferably 0.1-15%
Solid carrier 99.5-70%, preferably 97-85%
The following examples further illustrate the invention but do not limit the invention.
[0015]
F1. Emulsions a) b) c) d)
Active ingredient mixture 5% 10% 25% 50%
Calcium dodecylbenzenesulfonate 6% 8% 6% 8%
Castor oil polyglycol ether 4% -4% 4%
(Ethylene oxide 36 mol)
Octylphenol polyglycol ether-4%-2%
(Ethylene oxide 7-8 mol)
Cyclohexanone-10% 20%
Aromatic hydrocarbon mixture C ₉ -C ₁₂ 85% 78% 55% 16%
Dilution with water can give an emulsion of any desired concentration from such a concentrate.
[0016]
F2. Solution a) b) c) d)
Active ingredient mixture 5% 10% 50% 90%
1-methoxy-3- (3-methoxy--20% 20%-
Propoxy) -propane polyethylene glycol MW400 20% 10%--
N-methyl-2-pyrrolidone-30% 10%
Aromatic hydrocarbon mixture C _{9 to} C ₁₂ 75% 60% − −
The solution is suitable for use in the form of microdroplets.
[0017]
F3. Wettable powder a) b) c) d)
Active ingredient mixture 5% 25% 50% 80%
Sodium lignosulfonate 4%-3%-
Sodium lauryl sulfonate 2% 3% -4%
Sodium diisobutylnaphthalenesulfonate-6% 5% 6%
Octylphenol polyglycol ether-1% 2%-
(Ethylene oxide 7-8 mol)
Highly disperse silicic acid 1% 3% 5% 10%
Kaolin 88% 62% 35%-
The active ingredient is thoroughly mixed with an adjuvant and the mixture is thoroughly ground in a suitable attritor to provide a wettable powder, which is diluted with water to produce any desired A suspension of concentration can be obtained.
[0018]
F4. Coated granules a) b) c)
Active ingredient mixture 0.1% 5% 15%
Highly dispersed silicic acid 0.9% 2% 2%
Inorganic carrier 99.0% 93% 83%
(Diameter 0.1-1mm)
For example, CaCO ₃ or SiO ₂
The active ingredient is dissolved in methylene chloride and sprayed onto the carrier, after which the solvent is evaporated under vacuum.
[0019]
F5. Coated granules a) b) c)
Active ingredient mixture 0.1% 5% 15%
Polyethylene glycol MW200 1.0% 2% 3%
Highly dispersed silicic acid 0.9% 1% 2%
Inorganic carrier 98.0% 92% 80%
(Diameter 0.1-1mm)
For example, CaCO ₃ or SiO ₂
The finely ground active ingredient is evenly applied in a mixer to a carrier moistened with polyethylene glycol. Coated granules that are not powders are obtained in this manner.
[0020]
F6. Extruder granules a) b) c) d)
Active ingredient mixture 0.1% 3% 5% 15%
Sodium lignosulfonate 1.5% 2% 3% 4%
Carboxynutyl cellulose 1.4% 2% 2% 2%
Kaolin 97.0% 93% 90% 79%
The active ingredient is mixed with the adjuvant and ground, and the mixture is wetted with water. The mixture is extruded and then dried in a stream of air.
[0021]
F7. Powder a) b) c)
Active ingredient mixture 0.1% 1% 5%
Talc powder 39.9% 49% 35%
Kaolin 60.0% 50% 60%
By mixing the active ingredient with a carrier and grinding the mixture in a suitable attritor, a ready-made powder is obtained.
[0022]
F8. Flowable agent a) b) c) d)
Active ingredient mixture 3% 10% 25% 50%
Ethylene glycol 5% 5% 5% 5%
Nonylphenol polyglycol ether-1% 2%-
(Ethylene oxide 15 mol)
Sodium lignosulfonate 3% 3% 4% 5%
Carboxymethylcellulose 1% 1% 1% 1%
37% aqueous formaldehyde solution 0.2% 0.2% 0.2% 0.2%
Silicone oil emulsion 0.8% 0.8% 0.8% 0.8%
Water 87% 79% 62% 38%
The finely ground active ingredient is intimately mixed with an adjuvant to provide a flowable, from which a dilution of any desired concentration can be obtained by dilution with water.
[0023]
It is often more practical to formulate the active ingredients of the mixture according to the invention separately and mix them in the applicator in the form of a “tank mixture” in water just before spraying in the desired mixing ratio.
[0024]
Biological example:
Example B1: Pre-emergence test:
Test plants are sown in pots under greenhouse conditions. Standard soil is used as a cultivation substrate. At the preemergence stage, herbicides are applied to the soil surface both alone and in admixture. The application rate depends on the optimum concentration determined under outdoor or greenhouse conditions. The test is evaluated after 2-4 weeks (100% effect = plant completely killed: 0% effect = no phytotoxin effect). The mixture used in this test shows excellent results.
[0025]
Example B2: Postemergence test:
The test plants are grown in pots under greenhouse conditions until the post-spray stage.
[0026]
At the postemergence stage, the herbicide is applied to the test plants both alone and in admixture. The application rate depends on the optimum concentration determined under outdoor or greenhouse conditions. The test is evaluated after 2-4 weeks (100% effect = plant completely killed: 0% effect = no phytotoxin effect). The mixture used in this test shows excellent results.

Claims (3)

In addition to containing the usual inert formulation adjuvant, oxadiargyl, oxadiazone, phentolazamide, ethoxysulfuron, quinchlorac, pyrazolate, amicarbazone, bromobutide, carfentrazone (-ethyl), pyrizoleate, pyraflufen (-ethyl) as active ingredients , Sulfentrazone, Tepraloxydim, Clozinahop-propargyl, Pretilachlor, Butachlor, Oxadiclomephone, Fentrazamide, Benzobicyclone, Molinate, Quinchlorac, Ventazone, Pyrazolinate, Pentoxazone, Metamihop, Sinosulfuron, Imazosulfuron, Pyrazosulfuron (-ethyl) Ruflon, bensulfuron (-methyl), trisulfuron, prosulfuron, halosulfuro A mixture of at least two compounds selected from the group consisting of (-methyl), sulfometuron (-methyl), sulfosulfuron, chlorimuron (-ethyl), cyclosulfamuron, tritosulfuron and iodosulfuron A synergistic herbicidal composition comprising: A method of controlling undesired plant growth in a crop of useful plants comprising the step of applying a herbicidally effective amount of the composition of claim 1 to the crop or the location thereof. The method according to claim 2, wherein the crop is rice.