JP2000159609A - Herbicide composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a herbicide composition capable of further enhancing herbicidal potency against Corchorus capsularis, Chenopodium album, etc., even when the herbicide composition is complicatedly not prepared, and useful for foliage treatments, soil treatments, etc., in crop fields, by mixing a specific phenylpyridazinone compound with a specified solvent. SOLUTION: This herbicide composition comprises (A) a phenylpyridazinone compound of the formula (R is a 1-7C alkyl, a 5-6C cycloalkyl or a 2-6C alkenyl) [2-chloro-4-fluoro-5-(4-methyl-5-trifluoromethyl-3-pyridazinon-2-yl)ph enoxyacetic acid ethyl ester] as an active ingredient and (B) a paraffinic compound having a flash point of >=150 deg.C and/or a cycloparaffinic compound having a flash point of >=150 deg.C preferably in a weight ratio of 1:0.1 to 1:500, further 1:2 to 1:50. The component A is preferably contained in an amount of 1-50 wt.% in the composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a herbicidal composition.

[0002]

2. Description of the Related Art The general formula (1) (Wherein R represents an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 5 or 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms). The phenylpyridazinone compound represented by the following formula: It is a compound that has attracted attention as a component. By the way, in recent years, for reasons such as reducing the burden on the environment and ensuring safety for workers, pesticides that are effective with a smaller amount of application are required, and crop oil concentrates when spraying crops, etc. Nonionic surfactants,
Attempts have been made mainly to add so-called adjuvants to pesticide spray liquids in tanks to enhance the efficacy. However, the addition of an adjuvant to a pesticide spray liquid in a tank is complicated in terms of work, and the combination with the pesticide active ingredient that exerts an effect depending on the type of the pesticide potency enhancer such as an adjuvant is limited. It was the current situation. And, in the phenylpyridazinone compound, a herbicide containing a phenylpyridazinone compound containing a phenylpyridazinone compound which is more potent and requires no complicated preparation is not known in combination with a compound exhibiting an efficacy enhancing effect. Development of compositions has been desired.

[0003]

Under these circumstances, the present inventors have conducted intensive studies on a herbicide composition containing a phenylpyridazinone compound. The herbicidal composition contained
Even without performing the complicated preparation of mixing at the time of spray liquid preparation,
The present inventors have found that excellent herbicidal effect can be exerted by containing such a component in the preparation, and have led to the present invention. That is, the present invention provides the following general formula (1) Wherein R represents an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 5 or 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. And a herbicidal composition containing a paraffinic compound having a flash point of 150 ° C. or higher and / or a cycloparaffinic compound having a flash point of 150 ° C. or higher as an active ingredient (hereinafter, referred to as the present composition). .

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The substituent R in the present compound is an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 5 or 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms.
The present compound is usually contained in the herbicidal composition in an amount of 0.1 to 90% by weight, preferably 1 to 75% by weight, more preferably 1 to 50% by weight. A paraffinic compound having a flash point of 150 ° C or higher and / or a cycloparaffinic compound having a flash point of 150 ° C or higher (hereinafter, referred to as the present solvent).
Examples thereof include normal paraffins having 18 or more carbon atoms, isoparaffins having 18 or more carbon atoms, cycloparaffins having 18 or more carbon atoms, and preferably normal paraffins having about 18 to 70 carbon atoms and 1 carbon atoms.
About 8 to 200 isoparaffins, 18 to 200 carbon atoms
And more preferably normal paraffin having about 18 to 45 carbon atoms, isoparaffin having about 18 to 100 carbon atoms, and cycloparaffin having about 18 to 100 carbon atoms, A solvent containing this solvent as a main component is usually used. The solvent containing the present solvent as a main component is usually 5
0% by weight or more, preferably 70% by weight or more, more preferably 80% by weight or more. Normal paraffin having a flash point of 150 ° C or higher, isoparaffin having a flash point of 150 ° C or higher, or cycloparaffin having a flash point of 150 ° C or higher can be used alone or as a mixture of two or more.

[0005] Solvents containing the present solvent as a main component are commercially available, for example, Teclean N-30 (trade name of Nippon Oil Co., Ltd.), Teclean N-32 (trade name of Nippon Oil Co., Ltd.), Teclean N- 33 (trade name of Nippon Oil Co., Ltd.), machine oil 46P (flash point 254 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), agricultural chemical machine oil P (flash point 216 ° C, trade name of Japan-US Mineral Oil Co., Ltd.) ), Pesticide oil H (flash point 20
0 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil A
(Flash point 234 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil B (flash point 248 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil C (flash point 270 ° C, Japan-US Mineral Oil Co., Ltd.) Super Oil D (flash point 276)
° C, trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil E
(Flash point 304 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil F (flash point 316 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), No. 1 spindle oil (flash point 154 ° C, Japan-US Mines Oil Co., Ltd.), No. 2 spindle oil (flash point 180
℃, trade name of Japan-US Mineral Oil Co., Ltd., B machine oil (flash point 216 ° C, trade name of Japan-US Mineral Oil Co., Ltd.), C machine oil (flash point 216 ° C, trade name of Japan-US Mineral Oil Co., Ltd.) Exol D160 (flash point 156 ° C, paraffin / cycloparaffin = about 58/42, trade name of Exxon Chemical Co., Ltd.) Naplex 38 (flash point 168 ° C, naphthenic oil, mobile petroleum product name) , White Rex 205 (flash point 162 ° C, trade name of Mobile Oil Co., Ltd.), White Rex 207 (flash point 190
° C, Mobil Oil Co., Ltd.), White Rex 215 (Flash Point 220 ° C, Mobil Oil Co., Ltd.), White Rex 247 (Flash Point 268 ° C, Mobil Oil Co., Ltd.), White Rex 22
10 (flash point 300 ° C, trade name of Mobile Oil Co., Ltd.), White Rex 307 (flash point 192 ° C., trade name of Mobile Petroleum Corporation), White Rex 309
(Flash point 195 ° C, trade name of Mobile Oil Co., Ltd.),
White Rex 326 (flash point 248 ° C., trade name of Mobile Oil Co., Ltd.), White Rex 335 (flash point 262 ° C., trade name of Mobile Oil Co., Ltd.) and the like can be mentioned.

[0006] The present solvent is used in the present composition with respect to the present compound.
The content is usually 0.1 to 500 times by weight, preferably 1 to 100 times by weight, and more preferably 2 to 50 times by weight.

[0007] The composition is generally used in the form of liquid preparations such as oils, emulsions, aqueous suspensions, emulsions in water, suspensions in oils, and suspoemulsions, powders, wettable powders, granules and granules. It is applied in practical use in various preparation forms such as solid preparations such as wettable powders.

When the present composition is an oil, for example, the present compound and a solvent containing the present solvent as main components are mixed, or if necessary, an auxiliary solvent, a surfactant, a viscosity modifier and the like are added and mixed. It can be obtained by: Examples of the surfactant include a nonionic surfactant, an anionic surfactant, and a mixture thereof. Specific examples of the nonionic surfactant include polyoxyethylene carboxylate, polyoxyethylene polyoxypropylene alkylaryl ether, polyoxyethylene polyoxypropylene block copolymer, polyvinyl alcohol, polycarboxylic acid, and polyoxyethylene. Ethylene polystyrene block copolymer, polyoxyethylene alkylaryl ether, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene tristyryl phenyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene tristyryl phenyl ether, polyoxyethylene fatty acid Ester, fatty acid ester, polyhydric alcohol fatty acid ester, polyoxyethylene polyhydric alcohol fatty acid ester, polyoxy Examples of the anionic surfactant include, for example, dialkyl sulfocarboxylates, alkylaryl sulfonates, alkyl sulfonates, sulfosuccinates, higher fatty acid alkali salts, and polyalkylene sulfonates. Carboxylates, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl aryl ether phosphates, polyoxyethylene tristyryl phenyl ether phosphates, alkyl naphthalene sulfonates, formalin condensates of alkyl naphthalene sulfonates And lignin sulfonate. The content of the surfactant in the preparation is usually 30% by weight or less.

Examples of the auxiliary solvent include aromatic solvents, polar solvents, animal and vegetable oils, various waxes, and the like. Examples of the aromatic solvent include xylene, alkylbenzene, and alkylnaphthalene, and examples of the polar solvent include cyclohexanone, heptanone, octanone, nonanone, ketones such as N-methyl-2-pyrrolidone, acetophenone, hexyl acetate, and acetic acid. Benzyl, phenylethyl acetate, benzyl benzoate, methyl benzoate, benzyl salicylate, butyl cyclohexyl acetate, methyl benzyl acetate, methyl oleate, esters such as dibasic acid esters having 2 to 4 ethylene groups, ethylene glycol, propylene glycol, benzyl alcohol , Phenylethyl alcohol, butylcyclohexanol, alcohols such as phenyloxyethanol and the like. Examples of animal and vegetable oils include rapeseed oil,
Examples include soybean oil and linseed oil. The co-solvents can be used alone or as a mixture of two or more. The content of the co-solvent in the preparation depends on the concentration of the present compound in the preparation, but is usually 90% by weight or less, preferably 70% by weight or less, more preferably 50% by weight or less.

When the present composition is an emulsion, it can be obtained, for example, by dissolving the present compound in a mixture comprising a solvent containing the present solvent as a main component, a surfactant and an auxiliary solvent. Examples of the surfactant include the nonionic surfactant and the anionic surfactant exemplified in the above oil agent, and the content thereof is usually 1 to 40% by weight, preferably 2 to 20% by weight. . Examples of the auxiliary solvent include the aromatic solvent and the polar solvent exemplified in the above oil agent, and the content thereof is usually 90% by weight or less, preferably 70% by weight or less, and more preferably 50% by weight or less.

In the case where the present composition is a suspension-in-oil preparation, for example, a mixture comprising the present compound and a solvent containing the present solvent as a main component or, if necessary, a surfactant, a separating agent, The mixture obtained by adding an auxiliary agent such as a stabilizer and an auxiliary solvent is pulverized and dispersed by a wet pulverization method using a medium such as glass beads or zirconia. In addition, a mixture of a solvent containing this solvent as a main component, a surfactant, and, if necessary, a separation stabilizer, an antifoaming agent, an auxiliary solvent, etc., is preliminarily pulverized by a dry pulverization method such as a hammer mill or an air mill. It can also be obtained by uniformly dispersing the compound. The separation stabilizer can be prepared, for example, by adding the separation stabilizer or its solvent-dispersed swelled product at the time of wet pulverization dispersion or after pulverization and dispersion, and mixing while heating if necessary.

[0012] As a separation stabilizer, BENTONE
SD-1 (trade name of RHEOX Corporation), BENTO
NE SD-2 (trade name of RHEOX Corporation), BE
NTONE SD-3 (trade name of RHEOX Corporation), BENTONE 34 (trade name of RHEOX Corporation), BENTONE 38 (trade name of RHEOX Corporation), THIXATROL ST (trade name of RHEOX Corporation), THIXATROL SR / 100
(Trade name of RHEOX Corporation), THIXATROL
289 (trade name of RHEOX Corporation), THIXCI
NR (trade name of RHEOX Corporation), THIXAT
Organic clays such as ROL 53X (company RHEOX), organic bentonite, and organic montmorillonite can be mentioned, and the content is usually 0.01 to 10% by weight.
And preferably 0.1 to 5% by weight.

Examples of the surfactant include the nonionic surfactants and the anionic surfactants exemplified in the above oil agent, and the content thereof is usually 1 to 40% by weight.
And preferably 2 to 25% by weight. Examples of antifoaming agents include TSF 451 (trade name of Toshiba Silicone Co., Ltd.),
TSA720 (trade name of Toshiba Silicone Co., Ltd.), YSA0
2 (trade name of Toshiba Silicone Co., Ltd.), and the like.
Contained. Addition of an auxiliary solvent may be advantageous in viscosity adjustment or the like. Examples of the co-solvent include the co-solvents exemplified in the above oil agent, and the content in the preparation is usually 70% by weight or less, preferably 50% by weight or less, more preferably 30% by weight or less.

When the present composition is an emulsion in water, for example, after dissolving the present compound in a solvent containing the present solvent as a main component and an auxiliary solvent, the solution and the surfactant are dispersed in water and, if necessary, frozen. It can be obtained by adding an inhibitor, a separation stabilizer, an antifoaming agent and the like. After dissolving the present compound in a solvent containing the present solvent as a main component and an auxiliary solvent, the solution and the surfactant are dispersed in water with a stirrer such as a homogenizer, and then the solvent containing the present solvent as a main component and the surfactant are further dispersed. It can also be obtained by adding an agent, dispersing again, and adding an antifreezing agent or a separation stabilizer if necessary. When an auxiliary solvent is added, the compound is dissolved in the auxiliary solvent, the solution and the surfactant are dispersed in water with a stirrer such as a homogenizer, and then a solvent and a surfactant containing the present solvent as a main component are further added. Again, and if necessary, by adding an antifreezing agent or a separation stabilizer. Examples of the surfactant include the surfactants exemplified in the above oil agent.
Water-soluble polymers such as PVA and polyoxyethylene polyoxypropylene block polymers are preferred. The surfactant is usually contained in the preparation in an amount of 0.1 to 30% by weight.

Examples of the auxiliary solvent include the aromatic solvents and polar solvents exemplified in the above oil agent, and the content thereof is usually 60% by weight or less, preferably 50% by weight or less.
It is more preferably at most 30% by weight. Examples of the antifreeze include glycols such as propylene glycol, polypropylene glycol, ethylene glycol and diethylene glycol, and the content in the preparation is usually 20% by weight or less, preferably 10% by weight or less.

As the separation stabilizer, water-soluble polymers such as polyoxyalkylene, polyvinyl alcohol, sodium carboxymethylcellulose polycarboxylate, hydroxyethylcellulose, methylcellulose and derivatives thereof, which are used in ordinary aqueous suspension preparations for agricultural chemicals, Xansan gum, welan gum, guar gum, tragacanth gum, biogum such as sodium alginate, magnesium aluminum silicate and the like can be mentioned, and the content in the preparation is usually 0.001 to 10% by weight. Examples of the antifoaming agent include Antifoam C (trade name of Dow Corning), Antifoam CE (trade name of Dow Corning), TSA730 (trade name of Toshiba Silicone), TSA731 (trade name of Toshiba Silicone) Name), TSA732 (trade name of Toshiba Silicone Co., Ltd.), Y
MA6509 (trade name of Toshiba Silicone Co., Ltd.) and the like.
3% by weight is contained.

When the present composition is a suspoemulsion preparation, for example, a mixture of the present compound, a surfactant and water is pulverized and dispersed by a wet pulverization method using a medium such as glass beads or zirconia. The suspension thus prepared was prepared, and on the other hand, a solvent containing the present solvent as a main component and a surfactant, and if necessary, an auxiliary solvent were further added to prepare an emulsion dispersed with a stirrer such as a homogenizer. The emulsion is obtained by mixing the suspension and the emulsion, and adding and mixing a separation stabilizer, an antifreezing agent, an antifoaming agent and the like as necessary. In addition, a solvent containing the present solvent as a main component and a surfactant, an auxiliary solvent is further added as necessary, and an emulsified liquid is prepared using a stirrer such as a homogenizer to prepare an emulsion, which is then subjected to a dry milling method such as a hammer mill or an air mill. Pre-ground this compound and, if necessary, separation stabilizer, antifreezing agent, defoamer, etc.
It can also be obtained by adding to the emulsion and uniformly dispersing it. Examples of the surfactant include the surfactants exemplified in the above oil agent, and the content in the preparation is usually 1 to 20% by weight.

Examples of the auxiliary solvent include the aromatic solvents, polar solvents, animal and vegetable oils and the like exemplified in the above oil agent, and the content in the preparation is usually 60% by weight or less, preferably 50% by weight or less. It is more preferably at most 30% by weight. Examples of the separation stabilizer, the antifreezing agent, and the antifoaming agent include those exemplified in the above-mentioned aqueous emulsion preparation, and the contents thereof are generally the same as those in the case of the aqueous emulsion preparation.

When the present composition is a powder, for example, a solid carrier is mixed with a solvent containing the present compound and the present solvent as main components,
If necessary, an auxiliary agent may be further mixed and pulverized with a hammer mill, a Nara-type pulverizer, an air mill (such as a jet O miser) or the like, and then, if necessary, a solid carrier and an auxiliary agent may be further mixed for production. In addition, a solid carrier is mixed with the present compound, and if necessary, an auxiliary agent is further mixed. The mixture is pulverized by a hammer mill, a Nara pulverizer, an air mill (jet O miser, etc.),
If necessary, a solid carrier and / or an auxiliary agent may be further mixed, and then a solvent containing the present solvent as a main component may be added and mixed. Alternatively, the compound can be obtained by adding and dissolving the present compound and a solvent containing the present solvent as a main component and, if necessary, an auxiliary solvent, and mixing the solution and, if necessary, an auxiliary with a solid carrier. Examples of the solid carrier include minerals and inorganic fine powders used in ordinary agricultural chemical solid preparations.Specifically, clay, diatomaceous earth, talc, calcium carbonate, ammonium sulfate, bentonite, zeolite, acid clay, Activated clay, attapulgite, ammonium sulfate, sodium sulfate, potassium chloride, urea, synthetic hydrous silicon oxide, carboxymethyl cellulose and the like can be mentioned. Also, starch, dextrin, lactose,
Saccharides such as sucrose; wood flour; walnut shells; corn cobs; and organic fine powders such as powdered cellulose. Synthetic hydrous silicon oxide, carboxymethyl cellulose and the like can be mentioned.

[0020] These solid carriers are usually used in the preparation in an amount of from 1 to 9%.
5% by weight is contained. Auxiliaries include fluidity and dispersibility improvers or active ingredient stabilizers. Specifically, mixtures of mono- and diisopropyl phosphates, higher fatty acids, metal salts of higher fatty acids, tall oil fatty acids, calcium stearate, liquid paraffin, ethylene glycol, alkyl phosphate derivatives, alkali metal borates and alkaline earth metal borates, etc. Is mentioned.
The content of the auxiliary in the preparation is usually 70% by weight or less, preferably 30% by weight or less, more preferably 10% by weight or less. Examples of the auxiliary solvent include the aromatic solvents and polar solvents exemplified in the above oil agent. Its content is usually at most 40% by weight.

When the present composition is a wettable powder, for example, a solid carrier is mixed with the present compound, a solvent containing the present solvent as a main component and a surfactant, and if necessary, an antifoaming agent and the like are added. It can be manufactured by pulverizing with a Nara-type pulverizer or an air mill (jet O miser, etc.) and, if necessary, further mixing a solid carrier and an antifoaming agent. Also, a surfactant and a solid carrier are mixed with the present compound, and if necessary, an antifoaming agent and the like are mixed. After mixing the antifoaming agent and the like, a solvent containing the present solvent as a main component is added and mixed, and the mixture can be produced. Alternatively, the compound may be dissolved by adding a solvent containing the present compound and the present solvent as main components and, if necessary, an auxiliary solvent, and then adding the resulting solution, a surfactant, and, if necessary, an auxiliary to mix with the solid carrier.

Examples of the solid carrier include the solid carriers exemplified in the above-mentioned powders, and one or more of them can be used. The content in the preparation is usually from 1 to 95.
% By weight. Examples of the surfactant include the nonionic and anionic surfactants exemplified in the above oil agent, and one or more of them may be used.
The content in the preparation is usually 0.5 to 30% by weight. As an antifoaming agent, for example, a silicon-based surfactant,
And fluoro compounds such as perfluoroalkylphosphoric acid.

For the purpose of stabilizing the active ingredient and the like, an active ingredient stabilizer such as an alkali metal borate and an alkaline earth metal borate may be contained. The total content of the antifoaming agent and the active ingredient stabilizer in the preparation is usually 40% by weight or less, preferably 20% by weight or less.

When the present composition is a granular preparation of granules or wettable granules, it can be produced, for example, by a method of granulation or a method of impregnating granules. Specific examples of the method by granulation include a fluidized bed granulation method, a spray drying granulation method, an extrusion granulation method, a tumbling granulation method, and a compression granulation method.

For example, in the fluidized-bed granulation method, a powder consisting of a pulverized compound of the present invention, a solvent containing the present solvent as a main component and a solid carrier, or a surfactant, an auxiliary solvent and the like, if necessary, are added to the powder. This is a method in which an aqueous solution or dispersion containing a binder is sprayed on the powder thus obtained, whereby the powder particles are aggregated, and after granulation, moisture is dried to produce the powder. At this time, for example, without adding a solvent containing the present solvent as a main component at the time of preparing the powder, mixing a solvent containing the present solvent as a main component and an auxiliary solvent as necessary with an aqueous solution or dispersion containing a binder as necessary. However, it can also be manufactured by spraying. Also,
After granulation and drying are performed by the above method without adding a solvent containing the present solvent as a main component to obtain a granular material, a solvent containing the present solvent as a main component and, if necessary, an auxiliary solvent are spray-mixed to the granular material. You can also get. The spray-drying granulation method includes, for example, an aqueous solution or dispersion containing a pulverized compound of the present invention and a solvent containing the present solvent as main components, and further containing a solid carrier, an auxiliary solvent, a surfactant, a binder, and the like, if necessary. It is a method of granulating by spraying inside and simultaneously drying moisture. In addition, after producing a particulate material containing no solvent mainly containing the present solvent by the method, a solvent mainly containing the present solvent and, if necessary, an auxiliary solvent can be sprayed on the particulate material.

In the extrusion granulation, the pulverized compound of the present invention,
Kneading by adding an aqueous solution containing water or a binder to a powder comprising a solvent and a solid carrier containing the solvent as a main component, or a powder obtained by further adding an auxiliary solvent and a surfactant as necessary to the powder. Thereafter, the kneaded material is extruded with a screen, crushed to an appropriate length, dried with a dryer, and then granulated. In this method, the solvent or auxiliary solvent containing the present solvent as a main component may be mixed with water or an aqueous solution containing a binder, instead of being mixed with the powder. Further, a solvent containing the present solvent as a main component and, if necessary, an auxiliary solvent can be spray-mixed to a granulated product obtained by granulation without adding a solvent containing the present solvent as a main component. As the solid carrier, for example, it is not always necessary in the case of a spray-drying granulation method, but generally, the solid carriers exemplified in the above-mentioned powders are used, and one or more of them can be used. The content in the preparation is usually 0.5 to 95% by weight.

Examples of the surfactant include the surfactants exemplified in the above oil agent, and one or more of them may be used. In the case of granules, the content in the preparation is usually 20% by weight or less. In the case of a wettable powder, the content in the preparation is usually from 1 to 95% by weight when produced by the spray-drying granulation method, and the content in the preparation is produced by the other granulation method. Usually 0.5-4
0% by weight. Examples of the binder include carboxymethylcellulose, methylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, dextrin, soluble starch, and ligninsulfonate. In some cases, such as when bentonite is used as the solid carrier, it is unnecessary. The content in the preparation is usually 5% or less in the case of granules, and usually 2% or less in the case of wettable granules.

Examples of the auxiliary solvent include the solvents exemplified in the above oil agent. Its content is usually 5
0% by weight or less.

The method of impregnating the granules is as follows.
Pumice pulverized particles, bentonite pulverized particles, vermiculite pulverized particles, pearlite pulverized particles, various types of calcined particles and the like to a porous granular carrier, for example, a solution prepared from a solvent containing the present compound and the present solvent as a main component, or a If necessary, it can be produced by supporting a solution prepared by further adding an auxiliary solvent or a surfactant exemplified in the above oil agent. Further, in the case of granules and wettable powders, a granular carrier granulated by various granulation methods, for example, a solution prepared from a solvent containing the present compound and the present solvent as a main component, or the solution further if necessary. By carrying a solution prepared by adding an auxiliary solvent or a surfactant exemplified in the oil agent, a granular preparation can be obtained. The granular carrier is usually contained in the preparation in an amount of 30 to 95% by weight. The content of the auxiliary solvent is about 50% by weight.

Further, the present composition may contain a coloring agent such as rhodamine B.
10% by weight is contained.

The composition may further comprise, if necessary, other herbicides, insecticides, acaricides, nematicides, fungicides, plant growth regulators, insect growth regulators, fertilizers, soil conditioners, You may contain a power agent, an adjuvant, etc.

The present composition can be used for foliage treatment and soil treatment of upland fields, treatment in non-tillage cultivation of soybean, corn, wheat, etc., flooding treatment of paddy fields, orchards, pastures, turf, forestry areas or waterways. , Canal or other non-agricultural land. Usually, before or after emergence of the weed, the composition is subjected to soil treatment, foliage treatment or flooding treatment. Soil treatment includes soil surface treatment and soil admixture treatment.Stalk and foliage treatment includes treatment from above the plants and local treatment that treats only weeds so that they do not adhere to crops. The composition can be applied in any of the processes.

When the composition is sprayed, weather conditions,
Formulation form, treatment time, treatment method, soil conditions, target crop,
Depending on the target weeds, the amount of this compound is 1 hectare
It is usually diluted with water so that the weight per spray is 0.01 g to 10000 g, preferably 1 g to 8000 g, and the spray amount is 10 liter to 1000 liter per hectare. In the case of a paddy field or the like, in some cases, such treatment as water mouth treatment, water surface treatment, and the like can be performed without dilution. Further, the composition diluted with water for a spraying treatment can be sprayed in the air by a helicopter, an airplane, or a radio-controlled helicopter. In addition, the present compound is used as a cotton defoliant / desiccant, potato (Solanum tube)
rosum) is a harvest-assisting active ingredient, such as a desiccant, and the composition can also be applied to such applications, and is usually used alone or in other forms as the above-mentioned various preparations before harvesting the crop. The mixture is mixed with an agent and foliage treated.

[0034]

EXAMPLES Next, 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 to these examples. Formulation Example 1 5 parts by weight of 2-chloro-4-fluoro-5- (4-methyl-5-trifluoromethyl-
Ethyl 3-pyridazinone-2-yl) phenoxyacetate (hereinafter referred to as compound A), 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of agrochemical machine oil P
(Paraffinic / cycloparaffinic oil, flash point 2
16 ° C, manufactured by Japan-US Mineral Oil Co., Ltd.)
Thus, 100 parts by weight of a suspension preparation in oil (composition 1) containing 100% by weight was obtained.

Formulation Example 2 2.5 parts by weight of compound A, 10
Pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 87.5 parts by weight
Parts by weight of pesticide machine oil P (paraffinic / cycloparaffinic oil, flash point 216 ° C, manufactured by Japan-US Mineral Oil Co., Ltd.)
Was mixed to obtain 100 parts by weight of a suspension preparation in oil (composition 2) containing 2.5% by weight of compound A.

Formulation Example 3 5 parts by weight of compound A finely pulverized with an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of pesticide oil H (paraffinic) / Cycloparaffinic oil, flash point 200 ° C, manufactured by Japan-US Mineral Oil Co., Ltd.)
Suspension preparation in oil containing 5% by weight of compound A (composition 3) 10
0 parts by weight were obtained.

Formulation Example 4 5 parts by weight of compound A finely pulverized by an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of super oil B (paraffin type) / Cycloparaffinic oil, flash point: 248 ° C, manufactured by Nippon Mining & Oil Co., Ltd.) to obtain 100 parts by weight of an oil-in-oil suspension formulation (composition 4) containing 5% by weight of compound A.

Formulation Example 5 5 parts by weight of a compound A finely pulverized by an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of Super Oil C (paraffin type) / Cycloparaffinic oil, flash point: 270 ° C, manufactured by Nippon Mining & Oil Co., Ltd.) to obtain 100 parts by weight of a suspension preparation in oil (composition 5) containing 5% by weight of compound A.

Formulation Example 6 5 parts by weight of compound A finely pulverized with an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of machine oil 46P (paraffinic) / Cycloparaffinic oil, flash point: 254 ° C, manufactured by Nippon Mining & Oil Co., Ltd.), and a suspension preparation in oil containing 5% by weight of compound A (composition 6)
100 parts by weight were obtained.

Formulation Example 7 5 parts by weight of compound A finely pulverized by an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of Akatsuri oil (paraffin) System / cycloparaffinic oil,
A flash point of 175 [deg.] C., a molecular weight of about 70 to 1500 from FD-MS spectrum, manufactured by Jiamusi Sanjo, China) was mixed to obtain 100 parts by weight of a suspension preparation in oil (composition 7) containing 5% by weight of compound A. .

Formulation Example 8 5 parts by weight of compound A finely pulverized by an air mill, 10 parts by weight of pegnol O-4P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) and 85 parts by weight of super oil A (paraffin type) / Cycloparaffinic oil, flash point: 234 ° C, manufactured by Nippon Mining & Oil Co., Ltd.) to obtain 100 parts by weight of an oil-in-water suspension formulation (composition 8) containing 5% by weight of compound A.

Comparative Formulation Example 1 5 parts by weight of compound A finely pulverized by an air mill, 10 parts by weight of Geronol VO-278 (nonionic surfactant, manufactured by Rhodia) and 85 parts by weight of rapeseed oil (Housen Oil) 5% by weight of Compound A
100 parts by weight of a suspension preparation containing oil (comparative composition 1) was obtained.

Comparative Preparation Example 2 5 parts by weight of compound A finely pulverized with an air mill, 10 parts by weight of Geronol VO-278 (nonionic surfactant, manufactured by Rhodia) and 85 parts by weight of soybean oil (Wako Pure Chemical Industries, Ltd.) First grade reagent) was mixed to obtain 100 parts by weight of a suspension preparation in oil containing 5% by weight of Compound A (Comparative Composition 2).

Comparative Preparation Example 3 5 parts by weight of compound A finely pulverized by an air mill, 10 parts by weight of Geronol VO-278 (nonionic surfactant, manufactured by Rhodia) and 85 parts by weight of cottonseed oil (manufactured by Wako Pure Chemical Industries, Ltd.) A primary reagent) was mixed to obtain 100 parts by weight of a suspension preparation in oil containing 5% by weight of Compound A (Comparative Composition 3).

Comparative Formulation Example 4 5 parts by weight of compound A and 10 parts by weight of Sorpol 300
5X (a blend of nonionic and anionic surfactants, manufactured by Toho Chemical Co., Ltd.) is dissolved in 85 parts by weight of xylene to obtain 100 parts by weight of an emulsion containing 5% by weight of compound A (comparative composition 4). Was.

Comparative Preparation Example 5 20 parts by weight of compound A, 1.2 finely pulverized with an air mill
5 parts by weight of Surfinol 465 (polyoxyethylene acetylenic diol, manufactured by Air Products), 5 parts by weight of Soprophor FLK (40% solution of potassium polyoxyethylene tristyrylphenyl ether phosphate, manufactured by Rhodia), 0.2 part by weight Thickener obtained by previously dispersing and mixing 0.4 parts by weight of Kelzan S (xanthan gum, manufactured by Kelco) and 0.4 parts by weight of Vegum R (purified natural smectite clay, manufactured by Vanderbilt) in 19.4 parts by weight of water. 2 parts by weight of Proxel GXL
(1,2-benzisothiazolin-3-one, manufactured by ICI), 5 parts by weight of propylene glycol and 0.2 parts by weight of antiform CE (silicon-based defoamer, manufactured by Dow Corning) were mixed. 100 parts by weight of an aqueous suspension preparation containing 20% by weight of compound A (Comparative composition 5) was obtained.

Comparative Preparation Example 6 5 parts by weight of compound A and 10 parts by weight of pegnol O-4
P (polyoxyethylene olein ether, manufactured by Toho Chemical Co., Ltd.) is dissolved in 85 parts by weight of DBAM (dibasic acid ester having 2 to 4 ethylene groups, manufactured by Sanken Kako Co., Ltd.) and contains 5% by weight of compound A Emulsion (comparative composition 6) 10
0 parts by weight were obtained.

Comparative Preparation Example 7 40 parts by weight of compound A finely pulverized by an air mill, 3 parts by weight of Surfinol 465 (polyoxyethylene acetylenic diol, manufactured by Air Products), 7.5
Parts by weight of Soprophor FLK (polyoxyethylene tristyryl phenyl ether potassium phosphate 40%
Solution, Rhodia), 0.2 parts by weight of Kerzan S
(Xanthan gum, manufactured by Kelco) and 0.4 parts by weight of Vegum R (purified natural smectite clay, manufactured by Vanderbilt) were previously dispersed and mixed in 19.4 parts by weight of water, 0.2 part by weight Proxel GXL (1,
2-benzisothiazolin-3-one, manufactured by ICI),
And 0.2 parts by weight of Antifoam CE (a silicon-based antifoaming agent, manufactured by Dow Corning) were mixed to obtain 100 parts by weight of an aqueous suspension preparation (Comparative Composition 7) containing 40% by weight of Compound A. .

Test Example 1 In a concrete pot having a size of 0.129 m ² , Shiroza, Onami fir, Ichibai and Aojuyu were sowed outdoors, and
After growing for one day, morning glory was sown in the same pot, and then grown for another 14 days. Thereafter, a predetermined amount of the composition or the comparative composition obtained in Formulation Examples 1 to 6 or Comparative Formulation Examples 1 to 6 is diluted with 266 liters of water per hectare, and the entire foliage is applied from above the plant with a sprayer. Was processed uniformly. After the treatment, the plants were grown outdoors for 15 days and their herbicidal efficacy was investigated. The herbicidal effect was evaluated as 100 for complete withering and 0 for harmless. Table 1 shows the results.

[0050]

[Table 1]

Test Example 2 A soil was packed in a cylindrical plastic pot having a diameter of 17 cm and a depth of 14.5 cm, and Aobaju, Shiroza and Inuokazuki were sown outdoors, grown for 6 days, grown in the same pot, and stored in the same pot. After sowing soybean and cultivating for further 5 days, sowing corn in the same pot,
Raised for another 15 days. Thereafter, Formulation Examples 1, 4, 7, 8
Alternatively, a predetermined amount of the composition obtained in Comparative Preparation Example 7 was diluted with 266 liters of water per hectare, and the whole foliage was uniformly treated from above the plant with a sprayer. After the treatment, the plants were grown outdoors for 14 days, and the herbicidal efficacy was investigated. The herbicidal efficacy was evaluated as 100 with complete death and 0 as harmless. The results are shown in Tables 2 and 3.

[0052]

[Table 2]

[0053]

[Table 3]

Test Example 3 A cylindrical plastic pot having a diameter of 17 cm and a depth of 14.5 cm was filled with soil, and dog millet was grown in a greenhouse for 7 days. Thereafter, Formulation Examples 1, 4, 7, 8 or Comparative Formulation Example 7
Was diluted with 266 liters of water per hectare, and the whole surface of the foliage was uniformly treated from above the plant with a sprayer. After the treatment, the plants were raised in a greenhouse for 7 days, and the herbicidal efficacy was examined. Herbicidal effect is 10 withering
0 and harmless were evaluated as 0. Table 4 shows the results.

[0055]

[Table 4]

[0056]

According to the present invention, the herbicidal effect of the phenylpyridazinone compound can be further enhanced, and an excellent herbicidal composition can be provided.

Claims (7)

[Claims] 1. The following general formula (1) (Wherein R represents an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 5 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms), and a flash point of 150 ° C. or higher. And / or a cycloparaffinic compound having a flash point of 150 ° C. or higher as an active ingredient. 2. The weight ratio of the phenylpyridazinone compound to the paraffinic compound having a flash point of 150 ° C. or higher and / or the cycloparaffinic compound having a flash point of 150 ° C. or higher is 1: 0.1 to 1: 500. The herbicidal composition according to claim 1, which is: 3. The weight ratio of the phenylpyridazinone compound to the paraffinic compound having a flash point of 150 ° C. or more and / or the cycloparaffinic compound having a flash point of 150 ° C. or more is 1: 1 to 1: 100. The herbicidal composition according to claim 1. 4. The weight ratio of the phenylpyridazinone compound to the paraffinic compound having a flash point of 150 ° C. or more and / or the cycloparaffinic compound having a flash point of 150 ° C. or more is 1: 2 to 1:50. The herbicidal composition according to claim 1. 5. The following general formula (1) (Wherein R represents an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 5 or 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms). The above paraffinic compounds and / or
Alternatively, a cycloparaffinic compound having a flash point of 150 ° C. or more is used in an amount of 0.1 to 500 with respect to the phenylpyridazinone compound.
A method for enhancing the herbicidal efficacy of the phenylpyridazinone compound, which is carried out by mixing by weight. 6. The mixing ratio of the paraffinic compound having a flash point of 150 ° C. or higher and / or the cycloparaffinic compound having a flash point of 150 ° C. or higher is 1 to 100 times the weight of the phenylpyridazinone compound. The method described in. 7. The mixing ratio of the paraffinic compound having a flash point of 150 ° C. or higher and / or the cycloparaffinic compound having a flash point of 150 ° C. or higher is 2 to 50 times the weight of the phenylpyridazinone compound. The method described in.