JP2019043926A - High concentration pyrimidinedione-based liquid herbicidal composition - Google Patents

Abstract

To provide a technology having fast-acting property and residual effect and enabling to efficiently use a herbicidal compound.SOLUTION: A liquid herbicidal composition containing a pyrimidinedione-based herbicidal compound and an organic base compound. As the pyrimidinedione-based herbicidal compound, terbacil or bromacil, as the organic base compound, ethanolamine-based compound or polyoxyalkylenealkylamine, furthermore, one kind or two kinds selected from glyphosate or its salts, glufosinate or its salts which are amino acid-based herbicide, and plant hormone-based herbicide or its salts may be mixed and dissolved.SELECTED DRAWING: None

Description

  The present invention relates to a technology for efficiently controlling unnecessary and harmful weeds that grow in living environments.

  Herbicides are used to control weeds, as weeds overgrowth cause declines in agricultural productivity and deterioration of living conditions. In general, soil treatment agents are used before weeds are generated at the early stage of development, and when growth is advanced after weeds are generated, amino acid herbicides such as glyphosate which are shoots and leaves and plant hormones such as mecoprop are used. There is. However, these foliage-treated herbicides have poor soil treatment effects and can not be expected to be effective against weeds that occur for some time after application. As a high concentration liquid preparation having a soil treatment effect, a strong alkaline liquid preparation (Hyvar X-L) in which 21.9% of bromacyl which is a pyrimidinedione compound is converted to a lithium salt is present overseas. Glyphosate or its salts, glufosinate or its salts, and terbacil, bromacil, metribuzin as an effective means to control weeds that will subsequently develop while controlling advanced weeds A low concentration herbicide solution (see Patent Document 1) mixed with pentazone or its salts, or a relatively low concentration emulsion containing 2% glyphosate potassium salt and 2% soil treatment herbicide flupoxam has been proposed (see Patent Document 2).

JP 2007-224002 JP 2012-140381

  The object of the present invention is to simplify the dilution and spraying operation of the pesticide by making the pyrimidinedione compound into a liquid formulation, and at the same time improve the spread of the drug on the stems and leaves to accelerate the onset of the herbicidal effect. Another object of the present invention is to reduce the amount of use of a pyrimidinedione compound necessary for controlling weeds which have grown by using a herbicidal compound having a foliage treating effect in combination.

  As a result of intensive studies, the present inventors have found that the solvent solubility of pyrimidinedione compounds is improved by mixing organic base compounds. At the same time, preparation of high concentration integrated formulations with water soluble compounds such as amino acid based herbicidal compounds such as glyphosate and glufosinate which are used as stem and leaf treating agents and mecoprop such as plant hormone based herbicidal compounds or their aqueous solutions I found it possible. The combined use of different herbicidal compounds with different activity makes it possible to reduce the amount used compared with the case of using a pyrimidinedione compound alone, and at the same time improve the withering rate, control weeds which have grown, and impart residual activity. to enable. That is, the present invention relates to a herbicidal composition (hereinafter referred to as the composition of the present invention) described in the following [1], [2], [3], [4], [5], and [6]. .

  [1] A liquid herbicidal composition comprising a pyrimidinedione herbicidal compound and an organic base compound.

  [2] Dissolving an amino acid herbicidal compound glyphosate or its salt, glufosinate or its salt, a plant hormone herbicidal compound or its salt, in pyrimidinedione herbicidal compound and organic base compound Liquid weeding composition.

  [3] A liquid herbicidal composition wherein the pyrimidinedione herbicidal compound in [1] and [2] is terbacil or bromacil.

  [4] A liquid herbicidal composition wherein the organic base compound in [1] and [2] is an ethanolamine compound or a polyoxyalkylene alkylamine.

  The composition of the present invention not only accelerates the rate of onset of herbicidal action, but also enables easy mixing with other herbicidal compounds having other actions, and reduces the amount of drug administration compared to the case where each compound is used alone. To reduce environmental impact.

  Pyrimidinedione herbicidal compounds are non-selective soil treatment type herbicidal compounds having photosynthetic inhibitory activity, and bromacil, terbacil and lenacil are used as wettable powders or granules, and bromacil is used as mixed granules with various herbicidal compounds. It is done.

  The composition of the present invention is prepared as a liquid herbicidal composition by mixing a pyrimidinedione herbicidal compound with an organic base compound. The organic base compound is preferably an ethanolamine compound or a polyoxyalkylene alkylamine having high water solubility and boiling point. Examples of ethanolamine compounds include monoethanolamine, diethanolamine and triethanolamine. Further, polyoxyalkylene alkylamines classified as nonionic surfactants include polyoxyethylene coconut oil alkylamine, polyoxyethylene tallow alkylamine, polyoxyethylene polyoxypropylene alkylamine, and polyoxyethylene polyoxypropylene of ethylene diamine. Block polymers and the like can be mentioned.

  Although it is possible to prepare the pyrimidinedione type herbicidal compound alone and mixed with the organic base compound, it is also possible to prepare a liquid preparation in which existing foliage-treated herbicidal compounds are mixed.

  Glyphosate or a salt thereof, glufosinate or a salt thereof can be mentioned as a foliage-treated herbicidal compound. Examples of plant hormones or salts thereof include 2,4-PA sodium salt or dimethylamine salt, MCPA sodium salt or isopropylamine salt, MCPP potassium salt, triclopyr triethyl ammonium salt, MDBA dimethylamine salt and the like.

  The combined use of the pyrimidinedione herbicide compound and the foliage-treated herbicide compound makes it possible to expand the herbicidal spectrum, reduce the amount used, and maintain the herbicidal effect.

  The pyrimidinedione compound in the composition of the present invention is terbacyl or bromacil, and the preferred amount of the compound to be treated depends on the type of plant to be controlled and the like, but the amount of active ingredient used is 80 to 400 g / 10a.

  Glyphosate or its salts are used in an amount of 100 to 800 g / 10 a as the amount of active ingredient used in combination with the foliage-treated herbicidal compound. The glufosinate or a salt thereof is 50 to 400 g / 10 a, and the phytohormones such as MCPP are 50 to 200 g / 10 a.

  The content of the pyrimidinedione herbicidal compound in the composition of the present invention can be adjusted to 5% or more.

  The composition of the present invention can control annual weeds, perennial broad-leaved weeds, perennial grass weeds, suginas and zenigores.

  Carriers used for preparing liquid preparations include, for example, aromatic hydrocarbons such as xylene, alkylbenzenes and alkylnaphthalenes, machine oils, aliphatic hydrocarbons such as normal paraffins, isoparaffins and naphthenes, ethanol, isopropanol, cyclohexanol, Alcohols such as phenoxyethanol and benzyl alcohol, polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, polyethylene glycol and polypropylene glycol, propyl cellosolve, butyl cellosolve, phenyl cellosolve, propylene glycol monomethyl ether, propylene glycol monoethyl ether, Propylene glycol monopropyl ether, propylene Ethers such as recalled monobutyl ether and propylene glycol monophenyl ether, ketones such as acetophenone, cyclohexanone and γ-butyrolactone, fatty acid methyl ester, succinic acid dialkyl ester, ester such as adipic acid dialkyl ester and phthalic acid dialkyl ester, N-alkyl There may be mentioned pyrrolidone, fatty acid amides such as alkyldimethylamide, soybean oil, linseed oil, rapeseed oil, coconut oil, vegetable oils such as cottonseed oil and castor oil, dimethyl sulfoxide and water. In particular, glycols, fatty acid esters, fatty acid amides, vegetable oils and dimethyl sulfoxide are preferable from the viewpoint of solubility and safety.

  These liquid carriers may be used alone or in combination of two or more.

  As surfactant to be used together, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene polyoxypropylene block polymer, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxy acid Ethylene sorbitan fatty acid ester, castor oil ethylene oxide adduct, hydrogenated castor oil ethylene oxide adduct, acetylene glycol, acetylene glycol ethylene oxide adduct, acetylene alcohol ethylene oxide adduct, polyoxyethylene alkylamine, polyoxyalkylene alkylamine, etc. Nonionic surfactants, and as anionic surfactants, alkyl sulfates, alkyl Benzene sulfonate, lignin sulfonate, alkyl sulfosuccinate, naphthalene sulfonate, alkyl naphthalene sulfonate, salt of formalin condensate of naphthalene sulfonate, salt of formalin condensate of alkyl naphthalene sulfonate, polyoxyethylene And alkyl ether sulfuric acid or phosphoric acid ester salt, polyoxyethylene alkyl phenyl ether sulfuric acid or phosphoric acid ester salt, polyoxyethylene styryl phenyl ether sulfuric acid or phosphoric acid ester salt, polycarboxylic acid salt and polystyrene sulfonic acid salt. Other examples include cationic surfactants such as alkyl quaternary ammonium salts, amphoteric surfactants such as amino acid type and betaine type, silicone surfactants, and fluoro surfactants.

  The content of these surfactants is not particularly limited, but a range of usually 20 to 70 parts by weight is desirable with respect to 100 parts by weight of the preparation of the composition of the present invention. These surfactants may be used alone or in combination of two or more. It is also possible to add antifoam agents.

  Next, although formulation examples of the composition of the present invention are more specifically shown, the composition of the present invention is not limited thereto.

Formulation Example 1 Bromacil 15% Liquid Composition 15.5 g of triethanolamine and 11.5 g of dimethyl sulfoxide are added to 15.5 g of 97% bromacil and dissolved at 50 ° C. with stirring. After dissolution, add 57.5 g of an equivalent mixture of polyoxyethylene tristyryl phenyl ether (Sorpol T-10 Toho Chemical Industry Co., Ltd. product) and polyoxyethylene tristyryl phenyl ether (Sorpol T-15 Toho Chemical Industry Co., Ltd. product) Make a homogeneous solution.

[Formulation preparation example 2] terbasil 12% liquid composition 10 g of triethanolamine and 27.5 g of dimethyl sulfoxide are added to 12.5 g of 96% tarbacil and dissolved at 50 ° C. with stirring. After dissolution, 50 g of polyoxyethylene tristyryl phenyl ether (Sorpol T-15) is added to make a homogeneous solution.

[Formulation preparation example 3] bromacil 6% glyphosate isopropylamine 15% liquid composition 97% bromacil 6.2 g propylene glycol 20.6 g, carbon number 8-10 fatty acid dimethylamide (HALLCOMID M-8-10 product of Stepan Company) Add 20.6 g and 28.4 g of polyoxyethylene coconut oil alkylamine (Buranon L-210 Aoki Yushi Kogyo Co., Ltd. product) and dissolve with stirring at 50 ° C. After dissolution, 24.2 g of 62% aqueous glyphosate isopropylamine salt solution is added to make a homogeneous solution.

[Formulation preparation example 4] Bromacil 6% glyphosate isopropylamine 12% MCPP 2.5% liquid composition 97% Bromacil 6.2 g 96% MCPP, 17.5 g propylene glycol, fatty acid dimethylamide having 8 to 10 carbon atoms 11.4. Add 7 g and 42.6 g of polyoxyethylene coconut oil alkylamine (braunone L-210) and dissolve at 50 ° C. with stirring. After dissolution, 19.4 g of 62% aqueous solution of glyphosate isopropylamine salt is added to make a homogeneous solution.

[Preparation Example 5] bromacil 9% glufosinate ammonium 3% liquid composition 97% bromacil 9.2 g propylene glycol 21.2 g, carbon number 8 to 10 fatty acid dimethylamide 11.5 g, polyoxyethylene coconut oil alkylamine (braunon L-210) 41.9 g are dissolved at 50 ° C. with stirring. After dissolution, 16.2 g of 18.5% aqueous solution of glufosinate ammonium salt is added to make a homogeneous solution.

Formulation Example 6 Bromacil 12% MCPP 5% Liquid Composition To 12.4 g of 97% bromacil, 5.2 g of 96% MCPP, 16.2 g of dimethyl sulfoxide and 16.2 g of triethanolamine are added and dissolved at 50 ° C. with stirring. After dissolution, 50 g of polyoxyethylene tristyryl phenyl ether (Sorpol T-10) is added to make a homogeneous solution.

  At the time of use, each of the above-mentioned formulations is diluted 20 to 200 times with water and dispersed.

The preparations according to preparation examples 1 to 6 were stored at room temperature and at -10 ° C, and the state of the solution, and after dilution with hard water three times, the state of the solution and the state of crystallization were examined. The results are shown in Table 1 below. The crystal precipitation state was evaluated by − (without crystal precipitation) ± (with slight crystal precipitation) + (with crystal precipitation) ++ (with a large amount of crystal precipitation).

  The following comparison test results of the herbicidal effect and effect expression rate of representative liquid formulations containing pyrimidinedione compounds according to the above formulation formulation examples, and bromacil 80% wettable powder and glyphosate isopropylamine salt 41% solution as control agents Shown in.

[Weeding Effect Test Example 1]
The liquid formulation according to the above formulation formulation example and the control drug bromacil 80% wettable powder (Hyber X Maruwa Biochemical Co., Ltd. product) and glyphosate isopropylamine for a herbage of 10 to 20 cm in height grown in a 1 / 10000a pot A 41% solution of salt (manufactured by Kusatrose Nufam Co., Ltd.) was diluted to the following magnification, and a 100 ml equivalent was uniformly sprayed with a small spray per square meter. Three days after drug treatment, one week, one month, and two months after drug treatment, the degree of response to each drug of each weed was evaluated as an average value of duplicates of each drug. The degree of reaction was 11 steps from 0 (no drug reaction) to 10 (complete death). Table 2 shows the dilution factor of each drug used in the test, the equivalent amount per 10a of the pyrimidinedione herbicidal compound bromacil, and the treated amount thereof.

[Weeding effect test example 2]
The liquid formulation according to the above formulation formulation example and the control drug bromacil 80% wettable powder and glyphosate, assuming a field of 2 m ² per field in Ami-cho, Inashiki-gun, Ibaraki prefecture, where the annual grass weed crabgrass and the perennial broadleaf weed Scutellariata After diluting the 41% solution of isopropylamine salt to the following magnification, an equivalent amount of 100 ml per square meter was uniformly sprayed with Jouro. Four days after drug treatment, two weeks, one month, and three months after the drug treatment, the degree of response of each weed to the drug was evaluated as an average value of duplicates of each drug. The degree of response to the drug was 11 steps from 0 (no drug response) to 10 (complete death). Table 4 shows the dilution factor of each drug used in the test, the equivalent amount per 10a of the pyrimidinedione herbicidal compound bromacil, and the treated amount thereof. Table 4 shows the result for Scutellaria barbata D. Don. In addition, Table 6 shows the field coverage ratio and developmental weeds of crabgrass, Scutellaria barbata L. and other weeds growing on the field three months after the application.

  In the case of the one-year grass weed crabgrass, there was a slight recurrence in the formulation example 3 and the Hiber X wettable, but in the other drug treatment zones containing bromacil no recurrence was observed. On the other hand, in the xanthase solution treatment area, no effect was observed against Mechushiba that has occurred after dying Mechushiba at the early stage of development. Yomogi, which is a perennial broad-leaved weed, did not regenerate in all the drug treatment zones, but Scutellaria radix L. recognized regeneration from the withered residue in all zones. In addition, in the case of sablena with a small number of outbreak individuals, the saturase solution treatment group had a significantly more unsettled or remaining occurrence of sugina compared with the other drug treatment groups, and the formulation preparation example 4 showed no regeneration of sugiina at all .

Claims (4)

  A liquid herbicidal composition comprising a pyrimidinedione herbicidal compound and an organic base compound.   A liquid in which one or two or more selected from an amino acid herbicide herbicide glyphosate or a salt thereof, glufosinate or a salt thereof, a phytohormone herbicide or a salt thereof, and a pyrimidinedione herbicide compound and an organic base compound are mixed and dissolved Herbicidal composition.   A liquid herbicidal composition wherein the pyrimidinedione herbicidal compound according to claim 1 or 2 is terbacil or bromacil.   A liquid herbicidal composition wherein the organic base compound according to claim 1 or 2 is an ethanolamine compound or a polyoxyalkylene alkylamine.