Herbicide efficacy enhancer composition

Abstract

Provided is an herbicide efficacy enhancer composition that has excellent herbicidal effects. The herbicide efficacy enhancer composition contains a specific component (A) and a specific component (B).

Description

Herbicidal efficacy enhancer composition

[0001] The present invention relates to a herbicidal efficacy enhancer composition, a herbicidal composition, and a herbicidal method using the same.

[0002] BACKGROUND ART Conventionally, in order to fully utilize the effects of pesticides, various compounds have been used in combination with compositions containing pesticides.

[0003] Japanese Patent Application Laid-Open Publication No. 2017-66144 discloses an aqueous herbicide composition containing (a) an inorganic salt of N-(phosphonomethyl)glycine, (b) a C8-C12 fatty acid or a salt thereof, (c) one or more surfactants selected from the group consisting of polyoxyalkylene alkyl ethers and polyoxyethylene alkyl ether sulfates, (d) an inorganic salt, and (e) water. International Publication No. 2012 / 086617 discloses a liquid herbicide composition containing (a) a water-soluble herbicide component, (b) a polyoxyethylene alkyl ether sulfate, (c) an organic solvent, and (d) a polyoxyethylene alkyl ether, and capable of maintaining a single continuous phase at -5°C for at least three days. Japanese Patent Application Laid-Open Publication No. 2006-117650 discloses a herbicide composition containing (A) an amino acid herbicide, (B) a specific polyalkyleneoxy compound having a branched structure, and (C) a herbicide composition containing at least one of an anionic surfactant and an amphoteric surfactant. Japanese Patent Laid-Open Publication No. 05-294804 discloses a herbicidal suspension composition for paddy fields, which is characterized by using water as a dispersion medium, blending a herbicidal active ingredient and a surfactant, and having a physical property of an initial water surface spreading rate of 4.0 cm / sec (20°C) or more.

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide a herbicidal efficacy enhancer composition and a herbicide composition that exhibit wettability on plant foliage and enhance herbicidal efficacy, as well as a weed control method using the same.

[0005] In one aspect, the present invention provides a herbicidal efficacy enhancer composition containing the following component (A) and component (B):

[0006] Component (A): a compound represented by the following general formula (a1): １ａ O (R ２ａ O)ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ａ represents an alkanediyl group having 2 to 4 carbon atoms, l represents the average number of moles, and M ａ ＋ represents a counter ion.] Component (B): one or more selected from the following component (B1) and the following component (B2) Component (B1): a compound represented by the following general formula (b1): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ｂ represents an alkanediyl group having 2 to 4 carbon atoms, m represents the average number of moles of 1 to 5, R ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ is a hydrocarbon group having 7 to 11 carbon atoms, M ｂ ＋ indicates a counter ion.

[0007] In one embodiment, the present invention provides a herbicide composition comprising the component (A), the component (B), and the following component (C): Component (C): an agricultural chemical active ingredient of the herbicide.

[0008] In one aspect, the present invention provides a herbicidal method in which a herbicide spray solution containing the (A) component, the (B) component, and the (C) component is sprayed onto a plant to be controlled.

[0009] According to the present invention, there is provided a herbicidal efficacy enhancer composition having excellent herbicidal effect.

[0010] MODE FOR CARRYING OUT THE INVENTION [Herbicide Efficacy Enhancer Composition] In one embodiment, the herbicidal efficacy enhancer composition of the present invention contains the component (A) and the component (B).

[0011] <Component (A)> In one embodiment, the herbicidal efficacy enhancer composition of the present invention contains the compound represented by the general formula (a1) as the component (A) of the present invention.

[0012] In the general formula (a1), R １ａ In one form, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, and even more preferably a linear alkyl group, having 10 or more carbon atoms, preferably 11 or more, and more preferably 12 or more, and from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, and even more preferably a linear alkyl group, having 16 or less carbon atoms, preferably 15 or less, and more preferably 14 or less, having 16 or less carbon atoms, preferably 15 or less, and more preferably 14 or less, and

[0013] In the general formula (a1), R ２ａ In one form, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, it may be an alkanediyl group having 2 or more carbon atoms, and from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, it may be an alkanediyl group having 4 or less carbon atoms, preferably 3 or less carbon atoms, and more preferably 2 carbon atoms (ethanediyl group).

[0014] In the general formula (a1), l is R ２ａ In one embodiment, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be 0 or more, preferably 1 or more, more preferably 2 or more, and from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be 50 or less, preferably 25 or less, more preferably 20 or less, and even more preferably 10 or less.

[0015] In the general formula (a1), M ａ ＋represents a counter ion, examples of which include alkali metal ions such as sodium ion and potassium ion, and organic ions such as ammonium ion and triethanolammonium ion. From the viewpoints of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, the counter ion is preferably an alkali metal ion, and more preferably a sodium ion.

[0016] The component (A) in the present invention, in one form, may be preferably one or more selected from sodium lauryl sulfate, ammonium lauryl sulfate, polyoxyethylene sodium decyl sulfate, polyoxyethylene sodium lauryl sulfate, polyoxyethylene sodium myristyl sulfate, and polyoxyethylene sodium palmityl sulfate, more preferably one or more selected from sodium lauryl sulfate and polyoxyethylene sodium lauryl sulfate, and even more preferably polyoxyethylene sodium lauryl sulfate.

[0017] In another embodiment, the component (A) in the present invention may be preferably one or more selected from polyoxyethylene decyl ammonium sulfate, polyoxyethylene lauryl ammonium sulfate, polyoxyethylene myristyl ammonium sulfate, and polyoxyethylene palmityl ammonium sulfate.

[0018] <Component (B)> The herbicidal efficacy enhancer composition of the present invention contains, as one embodiment of the component (B) of the present invention, one or more selected from the component (B1) and the component (B2). The component (B1) may, in one embodiment, be a compound represented by the general formula (b1), and the component (B2) may, in one embodiment, be a compound represented by the general formula (b2).

[0019] In the general formula (b1), R １ｂIn one form, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, may be a hydrocarbon group having 10 or more carbon atoms, preferably 11 or more, more preferably 12 or more, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, even more preferably a linear alkyl group, and from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, may be a hydrocarbon group having 16 or less carbon atoms, preferably 15 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, even more preferably a linear alkyl group.

[0020] In the general formula (b1), R ２ｂ In one form, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, it may be an alkanediyl group having 2 or more carbon atoms, and from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, it may be an alkanediyl group having 4 or less, preferably 3 or less, carbon atoms, more preferably an alkanediyl group having 2 carbon atoms (ethanediyl group).

[0021] In the general formula (b1), m is R ２ｂ In one embodiment, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be 1 or more, preferably 2 or more, and from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, it may be 5 or less, preferably 4 or less, more preferably 3 or less.

[0022] In the general formula (b1), R ３ｂ represents a hydrogen atom or a methyl group, and in one form, may be preferably a hydrogen atom from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect.

[0023] In one form, the component (B1) in the present invention may be preferably one or more selected from polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene myristyl ether, and polyoxyethylene palmityl ether, more preferably one or more selected from polyoxyethylene lauryl ether, polyoxyethylene myristyl ether, and polyoxyethylene palmityl ether, and even more preferably polyoxyethylene lauryl ether.

[0024] In the general formula (b2), R ４ｂ In one form, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing herbicidal effect, it may be a hydrocarbon group having 7 or more carbon atoms, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, even more preferably a linear alkyl group, and from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing herbicidal effect, it may be a hydrocarbon group having 11 or less ... 9 or less carbon atoms, preferably an alkyl or alkenyl group, more preferably a linear or branched alkyl group, even more preferably a linear alkyl group.

[0025] In the general formula (b2), M ｂ ＋ represents a counter ion, examples of which include alkali metal ions such as hydrogen ions, sodium ions, and potassium ions, and organic ions such as ammonium ions and triethanolammonium ions. From the viewpoints of exerting wettability on the plant leaf surface and enhancing the herbicidal effect, the counter ion may be preferably a hydrogen ion.

[0026] In one form, the component (B2) in the present invention may be preferably one or more selected from octanoic acid, nonanoic acid, decanoic acid, and lauric acid, more preferably one or more selected from octanoic acid, nonanoic acid, and decanoic acid, and even more preferably octanoic acid.

[0027] In one embodiment of the herbicidal efficacy enhancer composition of the present invention, the component (B) in the present invention may be two or more types selected from the component (B1) and the component (B2). For example, the component (B1) may be one or more types selected from the compounds represented by the general formula (b1), and the component (B2) may be one or more types selected from the compounds represented by the general formula (b2).

[0028] <Composition, etc.> In one form, the content of the component (A) in the herbicidal efficacy enhancer composition of the present invention may be, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, and from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less.

[0029] In one embodiment, the content of component (B) in the herbicidal efficacy enhancer composition of the present invention may be, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, preferably 30% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more, and from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, preferably 90% by mass or less, more preferably 85% by mass or less, and even more preferably 80% by mass or less.

[0030] In the herbicidal efficacy enhancer composition of the present invention, the mass ratio of the content of the component (A) of the present invention to the content of the component (B) of the present invention, [(A) / (B)], may, in one form, be, from the viewpoint of exerting wettability on the plant foliage surface and enhancing herbicidal effect, preferably 0.05 or more, more preferably 0.10 or more, even more preferably 0.20 or more, and still more preferably 0.30 or more; and, from the viewpoint of exerting wettability on the plant foliage surface and enhancing herbicidal effect, may be, preferably 0.70 or less, more preferably 0.60 or less, even more preferably 0.50 or less, and still more preferably 0.40 or less.

[0031] In the herbicidal efficacy enhancer composition of the present invention, the total content of the component (A) of the present invention and the component (B) of the present invention may, in one form, be preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, and may be preferably 100% by mass or less, and from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, may be preferably 99% by mass or less, more preferably 98% by mass or less, even more preferably 95% by mass or less.

[0032] When the herbicidal efficacy enhancer composition of the present invention contains the component (B1) and the component (B2), the mass ratio of the content of the component (B1) to the content of the component (B2), [(B1) / (B2)], may, in one form, be preferably 0.1 or more, more preferably 0.3 or more, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, and may be preferably 9 or less, more preferably 3 or less, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect.

[0033] The herbicidal efficacy enhancer composition of the present invention may contain, in addition to the component (A) and the component (B), inorganic salts consisting of compounds other than the component (A) and the component (B), organic solvents, oils, chelating agents, antioxidants, antifoaming agents, thickeners, pH adjusters, solubilizing agents, colorants, evaporation inhibitors, preservatives, and the like, within the range that does not impair the effects of the present invention.

[0034] In one embodiment, the herbicidal efficacy enhancer composition of the present invention may consist of component (A) and component (B). From the viewpoint of exhibiting wettability on the plant foliage surface and enhancing the herbicidal effect, the herbicidal efficacy enhancer composition of the present invention may be preferably a liquid composition.

[0035] In another embodiment, the herbicidal efficacy enhancer composition of the present invention may contain water. As the water, tap water, distilled water, deionized water, etc. may be used as long as the effect of the herbicidal efficacy enhancer composition of the present invention is not impaired, and deionized water is preferred from the viewpoint of formulation stability.

[0036] When the herbicidal efficacy enhancer composition of the present invention contains water as another embodiment, the content of water in the composition may be, for example, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more, and, for example, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing herbicidal effect, preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less, in the composition. Furthermore, the water content of the herbicidal efficacy enhancer composition of the present invention may be 0% by mass, although a very small amount of water unavoidably mixed in from, for example, raw materials for production, is acceptable.

[0037] The herbicidal efficacy enhancer composition of the present invention may have a viscosity at 25°C of, in one embodiment, preferably 1 mPa s or more, more preferably 2 mPa s or more, and even more preferably 5 mPa s or more from the viewpoint of stability of the composition, and preferably 10,000 mPa s or less, more preferably 5,000 mPa s or less, and even more preferably 1,000 mPa s or less from the viewpoint of handleability. This viscosity is measured, for example, using a Brookfield digital B-type viscometer (model number: DV2T). A CPA-41Z rotor is used, and the viscosity is measured 1 minute after the start of measurement using a 2 ml liquid volume at a rotation speed of 10 RPM.

[0038] In one embodiment, the herbicidal efficacy enhancer composition of the present invention can be prepared by mixing and stirring the component (A), the component (B), optionally water, and any optional components. The components may be mixed by adding them all at once to water, or by adding them separately to water. When the components are added separately, the order of addition of the components does not matter.

[0039] In one embodiment, the herbicidal efficacy enhancer composition of the present invention may be applied to an amino acid herbicide having a structure in which phosphate is bound to an amino acid skeleton. That is, the present invention may be a herbicidal efficacy enhancer composition for an amino acid herbicide, containing the component (A) and the component (B). In the herbicidal efficacy enhancer composition for an amino acid herbicide of the present invention, the component (A), the component (B), and preferred aspects thereof may be the same as those described for the herbicidal efficacy enhancer composition of the present invention.

[0040] In one form, when the herbicidal efficacy enhancer composition of the present invention is applied to an amino acid-based herbicide, the components may be blended (contained) so that the contents of the components in the herbicidal efficacy enhancer composition of the present invention are in the following proportions per 100 parts by mass of the agricultural chemical raw material (active ingredient) of the amino acid-based herbicide. That is, the content of the (A) component in the composition relative to 100 parts by mass of the agricultural chemical technical grade (active ingredient) of the amino acid herbicide may be, for example, preferably 0.3 parts by mass or more, more preferably 3 parts by mass or more, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, and may be, for example, preferably 1,000 parts by mass or less, more preferably 300 parts by mass or less, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect. The content of the (B) component in the composition relative to 100 parts by mass of the agricultural chemical technical grade (active ingredient) of the amino acid herbicide may be, for example, preferably 0.7 parts by mass or more, more preferably 7 parts by mass or more, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, and may be, for example, preferably 1,000 parts by mass or less, more preferably 700 parts by mass or less, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect.

[0041] [Herbicide composition] In one embodiment, the herbicide composition of the present invention contains the component (A), the component (B), and the component (C) described below. In another embodiment, the present invention contains a herbicide potentiator composition containing the component (A) and the component (B), and the component (C) described below. The aspects described for the herbicide potentiator composition of the present invention can be applied to the herbicide composition of the present invention as appropriate. In the herbicide composition of the present invention, the component (A), the component (B), optional components, and preferred aspects thereof may be the same as those described for the herbicide potentiator composition of the present invention.

[0042] <Component (C)> In one embodiment, the herbicidal composition of the present invention contains an agricultural chemical active ingredient of the herbicide, which is the component (C) of the present invention. In the present invention, the agricultural chemical active ingredient of the herbicide refers to the active ingredient of the herbicide of the present invention.

[0043] The component (C) in the present invention may be, for example, that described in paragraph 0050 of JP 2017-109999 A, but the component (C) in the present invention may preferably be, for example, an agricultural chemical active ingredient of an amino acid-based herbicide. In the present invention, "amino acid-based" refers to a compound having a structure in which phosphoric acid is bound to an amino acid skeleton.

[0044] Examples of the component (C) in the present invention include, as one form, (C1) a compound selected from glufosinate and salts thereof [hereinafter referred to as component (C1)], and (C2) a compound selected from glyphosate and salts thereof [hereinafter referred to as component (C2)]. From the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect, the component (C) in the present invention may preferably be (C1) a compound selected from glufosinate and salts thereof.

[0045] Glufosinate, registered as a pesticide in Japan, is ammonium-DL-homoalanin-4-yl(methyl)phosphinate, i.e., an ammonium salt compound. In the present invention, however, the term "glufosinate" refers to an acid-type compound (a compound in which the phosphinic acid group is in an acid type). Examples of glufosinate salts include ammonium salts and sodium salts.

[0046] In addition, glyphosate registered as a pesticide in Japan includes compounds such as isopropylamine-N-(phosphonomethyl)-glycine, i.e., isopropylamine salt, but in this invention, glyphosate refers to the acid-type compound (a compound in which the phosphonic acid group is in the acid type). Examples of glyphosate salts include isopropylammonium salt, ammonium salt, sodium salt, and potassium salt.

[0047] When the component (C) of the present invention is blended (contained) in the herbicidal composition of the present invention, one form of the composition that can be used is an aqueous solution, liquid formulation, wettable powder, etc. that contains the component (C) of the present invention.

[0048] In one form, the content of the component (A) in the herbicidal composition of the present invention may be, from the viewpoint of exhibiting wettability on plant foliage surfaces and enhancing herbicidal effect, preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 2% by mass or more, in the composition; and from the viewpoint of enhancing herbicidal effect, preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less.

[0049] In one form, the content of the component (B) in the herbicidal composition of the present invention may be, from the viewpoint of exhibiting wettability on plant foliage surfaces and enhancing herbicidal effect, preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 5% by mass or more, and from the viewpoint of enhancing herbicidal effect, preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and still more preferably 20% by mass or less.

[0050] In one embodiment, the content of the component (C) in the herbicidal composition of the present invention may be, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 5% by mass or more in the composition, and from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 50% by mass or less.

[0051] When the component (C1) is used as the component (C) in the herbicidal composition of the present invention, the content of the component (C1) in the present invention may, in one form, be, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 5% by mass or more, in the composition; and, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less. When the herbicidal composition of the present invention uses the component (C2) as the component (C) of the present invention, the content of the component (C2) of the present invention in the composition, in one form, may be, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 2% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more, and from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 50% by mass or less.

[0052] When the herbicidal composition of the present invention contains, for example, the component (A), the component (B), and the component (C1), the mass ratio of the content of the component (C1) to the total content of the content of the component (A) and the content of the component (B) [(C1) / {(A)+(B)}] may, in one embodiment, be preferably 0.5 or more, more preferably 0.6 or more, and even more preferably 0.7 or more, from the viewpoint of enhancing the herbicidal effect, and may be preferably 3.0 or less, more preferably 2.5 or less, and even more preferably 2.0 or less, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect.

[0053] That is, the present invention may be a herbicide composition comprising, for example, the component (A), the component (B), and the component (C1), in which the mass ratio of the content of the component (C1) to the total content of the content of the component (A) and the content of the component (B) [(C1) / {(A)+(B)}] is, in one form, preferably 0.5 or more, more preferably 0.6 or more, and even more preferably 0.7 or more, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, and is preferably 3.0 or less, more preferably 2.5 or less, and even more preferably 2.0 or less, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect.

[0054] When the herbicidal composition of the present invention contains, for example, the component (A), the component (B), and the component (C2), the mass ratio of the content of the component (C2) to the total content of the component (A) and the component (B) [(C2) / {(A)+(B)}] may, in one embodiment, be preferably 0.5 or more, more preferably 1.2 or more, and even more preferably 1.4 or more, from the viewpoint of enhancing the herbicidal effect, and may be preferably 3.0 or less, more preferably 2.8 or less, and even more preferably 2.5 or less, from the viewpoint of exhibiting wettability on the plant leaf surface and enhancing the herbicidal effect.

[0055] That is, the present invention may be a herbicide composition comprising, for example, the component (A), the component (B), and the component (C2), in which the mass ratio of the content of the component (C2) to the total content of the content of the component (A) and the content of the component (B) [(C2) / {(A)+(B)}] is, in one form, preferably 0.5 or more, more preferably 1.2 or more, and even more preferably 1.4 or more, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect, and is preferably 3.0 or less, more preferably 2.8 or less, and even more preferably 2.5 or less, from the viewpoint of exerting wettability on the plant foliage surface and enhancing the herbicidal effect.

[0056] In one embodiment, the herbicide composition of the present invention may consist of component (A), component (B), and component (C). In one form, the herbicide composition of the present invention may be preferably a liquid composition, from the viewpoint of exhibiting wettability on the plant foliage surface and enhancing the herbicidal effect.

[0057] In another embodiment, the herbicide composition of the present invention may contain water. When the herbicide composition of the present invention contains water in another embodiment, the water content in the composition may be, in one form, preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.5% by mass or more, from the viewpoint of improving formulation stability, and may be, in one form, preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, from the viewpoint of improving formulation stability. In one form, the herbicide composition of the present invention may have a water content of 0% by mass, although, for example, a very small amount of water inevitably mixed in from the production raw materials, etc., is acceptable.

[0058] In one embodiment, the present invention provides a method for producing a herbicide composition by mixing the component (A), the component (B), and the component (C).In another embodiment, the present invention provides a method for producing a herbicide composition by mixing the component (A), the component (B), and the component (C), wherein the components are mixed so that the mass ratio of the content of the component (C) to the total content of the content of the component (A) and the content of the component (B) [(C) / {(A)+(B)}] is 0.5 or more and 3.0 or less.

[0059] The aspects described for the herbicide potentiator composition of the present invention and the herbicide composition of the present invention can be applied as appropriate to the method for producing the herbicide composition of the present invention. In the method for producing the herbicide composition of the present invention, the component (A), the component (B), the component (C), the optional components, and their preferred aspects may be the same as those described for the herbicide potentiator composition of the present invention and the herbicide composition of the present invention. In the method for producing the herbicide composition of the present invention, it is preferable to mix water.

[0060] [Weeding Method] As one embodiment, the present invention provides a weeding method comprising spraying a herbicide spray liquid containing the (A) component, the (B) component, and the (C) component to plants to be controlled. As another embodiment, the present invention provides a weeding method comprising spraying a herbicide spray liquid containing a herbicide efficacy enhancer composition containing the (A) component and the (B) component, and an agricultural chemical active ingredient of the herbicide to plants to be controlled. As another embodiment, the present invention provides a weeding method comprising spraying a herbicide spray liquid containing a herbicide composition containing the (A) component, the (B) component, and the (C) component to plants to be controlled.

[0061] In the herbicidal method of the present invention, the aspects described for the herbicidal efficacy enhancer composition of the present invention and the herbicidal composition of the present invention can be applied as appropriate. In the herbicidal method of the present invention, the component (A), the component (B), the component (C), the optional components, and preferred aspects thereof may be the same as those described for the herbicidal efficacy enhancer composition of the present invention and the herbicidal composition of the present invention.

[0062] In one embodiment of the herbicidal method of the present invention, the herbicide spray solution of the present invention may further contain water, for example, in addition to the (A) component, the (B) component, the (C) component and any optional components, it may contain the remainder water.

[0063] In the herbicidal method of the present invention, the content of component (A) in the herbicide spray solution of the present invention may, in one form, be preferably 50 ppm or more, more preferably 100 ppm or more, and even more preferably 200 ppm or more, from the viewpoint of improving the herbicidal effect, and may be preferably 500 ppm or less, more preferably 400 ppm or less, and even more preferably 300 ppm or less, from the viewpoint of economy.

[0064] In the herbicidal method of the present invention, the content of component (B) in the herbicide spray solution of the present invention may, in one form, be preferably 150 ppm or more, more preferably 250 ppm or more, even more preferably 350 ppm or more, from the viewpoint of improving the herbicidal effect, and preferably 2000 ppm or less, more preferably 900 ppm or less, even more preferably 800 ppm or less, from the viewpoint of economy.

[0065] In the herbicidal method of the present invention, the content of component (C) in the herbicide spray solution of the present invention may, in one form, be preferably 200 ppm or more, more preferably 300 ppm or more, and even more preferably 500 ppm or more, from the viewpoint of improving the herbicidal effect, and may be preferably 4000 ppm or less, more preferably 3000 ppm or less, and even more preferably 2000 ppm or less, from the viewpoint of economy.

[0066] In the herbicidal method of the present invention, for example, when the herbicidal efficacy enhancer composition is used, the herbicide spray solution of the present invention may be prepared so that the total content of the component (A) and the component (B) in the herbicidal efficacy enhancer composition is, in one form, preferably 1 part by mass or more, more preferably 10 parts by mass or more, and for example, preferably 1,000 parts by mass or less, more preferably 500 parts by mass or less, per 100 parts by mass of the agrochemical active ingredient (active ingredient) of the herbicide.

[0067] In the herbicidal method of the present invention, for example, when the herbicide composition of the present invention is used, the herbicide spray solution of the present invention may be prepared so that the total content of the (A) component, the (B) component, and the (C) component in the herbicide composition is, in one form, preferably 400 ppm or more, more preferably 650 ppm or more, even more preferably 1050 ppm or more, from the viewpoint of improving the herbicidal effect, and preferably 5500 ppm or less, more preferably 4300 ppm or less, even more preferably 3100 ppm or less, from the viewpoint of economy.

[0068] In the herbicidal method of the present invention, the herbicide spray solution is sprayed at a rate of preferably 1 L / ha or more, more preferably 10 L / ha or more, even more preferably 100 L / ha or more, and even more preferably 500 L / ha or more from the viewpoint of improving herbicidal effect, and from the viewpoint of economic efficiency and reducing environmental load, it may be sprayed at a rate of preferably 5000 L / ha or less, more preferably 2000 L / ha or less, more preferably 1500 L / ha or less, and even more preferably 1000 L / ha or less. Here, the spray area may be the area of ​​the target object to which the pesticide is sprayed, for example, an area where crops to which the pesticide is applied are grown or an area where organisms live.

[0069] In the herbicidal method of the present invention, the pH of the herbicide spray solution of the present invention at 25°C may be preferably 1 or higher, more preferably 2 or higher, and preferably 8 or lower, more preferably 6 or lower. The pH at 25°C is calculated using a glass electrode pH meter.

[0070] In one embodiment, the weed control method of the present invention may involve applying a predetermined spray solution to weeds, which are plants to be eradicated. In the agricultural field, weeds are recognized as herbaceous plants that grow in and around cultivated land and harm crop production. In fields other than agriculture, weeds are recognized as herbaceous plants that grow naturally not only in cultivated land but also in non-cultivated land such as roads, railroad tracks, embankments, factory sites, developed land, lawns, and gardens, interfering with the function of the land and causing problems in terms of disaster prevention and landscape. In the present invention, all of these herbaceous plants are encompassed as weeds. Weeds include broadleaf weeds and grass weeds. Broadleaf weeds have reticulated leaf veins, unlike grass weeds, which have linear leaves or parallel leaf veins.

[0071] Examples of plants to be controlled by the herbicidal composition of the present invention include one or more herbaceous plants selected from the Poaceae, Cyperaceae, Asteraceae, Commelinaceae, Convolvulaceae, Solanaceae, Cucurbitaceae, Vitaceae, Fabaceae, Rubiaceae, Onagraceae, Polygonaceae, ferns (Equisetaceae), and Malvaceae.

[0072] Examples of grasses of the Poaceae family include barnyard grass, barnyard grass, green foxtail, golden foxtail, purple foxtail, annual bluegrass, annual foxtail, sedge, crabgrass, crabgrass, cut grass, orchard grass, Japanese silvergrass, paspalum, Imperata cylindrica, common jasmine, and bamboo grass, and barnyard grass is preferred from the viewpoint of improving the herbicidal effect. Examples of herbs of the Cyperaceae family include nutsedge and Eleocharis kuroguwai.

[0073] Examples of herbs in the Asteraceae family include ragweed, artemisia, cocklebur, giant ragweed (also known as false mulberry), chamomile, tall goldenrod, Bidens festoon, and mugwort. Examples of herbs in the Commelinaceae family include dayflower. Examples of herbs in the Convolvulaceae family include morning glory and bindweed. Examples of herbs in the Solanaceae family include ground cherry and horsenettle. Examples of herbs in the Cucurbitaceae family include ragweed. Examples of herbs in the Vitaceae family include Caerulea gracilis. Examples of herbs in the Fabaceae family include vetch and kudzu. Examples of herbs in the Rubiaceae family include clover. Examples of herbs in the Onagraceae family include evening primrose. Examples of herbs in the Polygonaceae family include Japanese knotweed and Rumex. Examples of herbs in the Fern family (Equisetaceae family) include Equisetum arvense. Examples of herbs in the Malvaceae family include Abutilon verum.

[0074] In one embodiment, the weed-controlling method of the present invention can be used to control weeds selected from broad-leaf weeds and narrow-leaf weeds of the grass family. Furthermore, in one embodiment, the weed-controlling method of the present invention can be used to control barnyard grass.

[0075] In addition to the above-described embodiment, the present invention discloses the following aspects.

[0076] <1> A herbicidal efficacy enhancer composition comprising the following component (A) and component (B):

[0077] Component (A): a compound represented by the following general formula (a1): １ａ O (R ２ａ O) ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ａ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ａIt represents the average number of moles of O, and is 0 or more, further 1 or more, further 2 or more, and 50 or less, further 25 or less, further 20 or less, and further 10 or less. M ａ ＋ represents a counter ion, which is at least one selected from alkali metal ions such as sodium ion and potassium ion, organic ions such as ammonium ion and triethanolammonium ion, and further represents an alkali metal ion, and further represents a sodium ion.

[0078] Component (B): one or more selected from the following component (B1) and the following component (B2); Component (B1): a compound represented by the following general formula (b1): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ｂ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ｂ R represents the average number of moles of O, and is 1 or more, further 2 or more, and 5 or less, further 4 or less, further 3 or less. ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ represents a hydrocarbon group, an alkyl group or an alkenyl group, a linear or branched alkyl group, or a linear alkyl group having 7 or more carbon atoms, and 11 or less, or even 9 or less carbon atoms. M ｂ ＋ represents a counter ion, which is at least one selected from the group consisting of a hydrogen ion, an alkali metal ion such as a sodium ion, and a potassium ion, an ammonium ion, and an organic ion such as a triethanolammonium ion, and further represents a hydrogen ion.

[0079] <2> The herbicidal efficacy enhancer composition according to <1>, wherein the component (A) is one or more selected from sodium lauryl sulfate, ammonium lauryl sulfate, polyoxyethylene (average number of moles: 1 to 50) sodium decyl sulfate, polyoxyethylene (average number of moles: 1 to 50) ammonium decyl sulfate, polyoxyethylene (average number of moles: 1 to 50) sodium lauryl sulfate, polyoxyethylene (average number of moles: 1 to 50) ammonium lauryl sulfate, polyoxyethylene (average number of moles: 1 to 50) sodium myristyl sulfate, polyoxyethylene (average number of moles: 1 to 50) ammonium myristyl sulfate, polyoxyethylene (average number of moles: 1 to 50) sodium palmityl sulfate, and polyoxyethylene (average number of moles: 1 to 50) ammonium palmityl sulfate, further selected from sodium lauryl sulfate and polyoxyethylene (average number of moles: 1 to 50) sodium lauryl sulfate, further selected from polyoxyethylene (average number of moles: 1 to 50) sodium lauryl sulfate.

[0080] <3> The herbicidal efficacy enhancer composition according to <1> or <2>, wherein the component (B1) is one or more selected from polyoxyethylene (average number of moles: 1 to 5) decyl ether, polyoxyethylene (average number of moles: 1 to 5) lauryl ether, polyoxyethylene (average number of moles: 1 to 5) myristyl ether, and polyoxyethylene (average number of moles: 1 to 5) palmityl ether, further one or more selected from polyoxyethylene (average number of moles: 1 to 5) lauryl ether, polyoxyethylene (average number of moles: 1 to 5) myristyl ether, and polyoxyethylene (average number of moles: 1 to 5) palmityl ether, further polyoxyethylene (average number of moles: 1 to 5) lauryl ether.

[0081] <4> The herbicidal efficacy enhancer composition according to any one of <1> to <3>, wherein the component (B2) is one or more selected from octanoic acid, nonanoic acid, decanoic acid, and lauric acid, further one or more selected from octanoic acid, nonanoic acid, and decanoic acid, further octanoic acid.

[0082] <5> The component (B) is, as the component (B1), one or more selected from polyoxyethylene (average number of moles: 1 to 5) decyl ether, polyoxyethylene (average number of moles: 1 to 5) lauryl ether, polyoxyethylene (average number of moles: 1 to 5) myristyl ether, and polyoxyethylene (average number of moles: 1 to 5) palmityl ether, further one or more selected from ... polyoxyethylene (average number of moles: 1 to 5) lauryl ether and a combination of, as the component (B2), one or more selected from octanoic acid, nonanoic acid, decanoic acid, and lauric acid, further one or more selected from octanoic acid, nonanoic acid, and decanoic acid, further two or more selected from octanoic acid, or further one or more selected from the compounds exemplified as the component (B1) and one or more selected from the compounds exemplified as the component (B2), wherein the mass ratio of the content of the component (B1) to the content of the component (B2), [(B1) / (B2)], is 0.1 or more, further 0.3 or more, and 9 or less, further 3 or less.

[0083] <6> The herbicidal efficacy potentiator composition according to any one of <1> to <5>, wherein the content of the component (A) in the herbicidal efficacy potentiator composition is 5% by mass or more, further 10% by mass or more, even 15% by mass or more, and 50% by mass or less, further 40% by mass or less, even 30% by mass or less.

[0084] <7> The herbicidal efficacy potentiator composition according to any one of <1> to <6>, wherein the content of the component (B) in the herbicidal efficacy potentiator composition is 30% by mass or more, further 40% by mass or more, even 50% by mass or more, and 95% by mass or less, further 90% by mass or less, further 85% by mass or less, even 80% by mass or less.

[0085] <8> The herbicidal efficacy enhancer composition according to any one of <1> to <7>, wherein the mass ratio of the content of the component (A) to the content of the component (B), [(A) / (B)], is 0.05 or more, further 0.10 or more, further 0.20 or more, further 0.30 or more, and is 0.70 or less, further 0.60 or less, further 0.50 or less, and further 0.40 or less.

[0086] <9> The herbicidal efficacy potentiator composition according to any one of <1> to <8>, wherein the total content of the component (A) and the component (B) in the herbicidal efficacy potentiator composition is 30% by mass or more, further 40% by mass or more, further 50% by mass or more, and 100% by mass or less, further 99% by mass or less, further 98% by mass or less, and further 95% by mass or less.

[0087] <10> The herbicidal efficacy enhancer composition according to any one of <1> to <9>, wherein, when the herbicidal efficacy enhancer composition contains the component (B1) and the component (B2), the mass ratio of the content of the component (B1) to the content of the component (B2), [(B1) / (B2)], is 0.1 or more, further 0.3 or more, and is 9 or less, further 3 or less.

[0088] <11> The herbicidal efficacy potentiator composition according to any one of <1> to <10>, further comprising water, wherein the content of water in the herbicidal efficacy potentiator composition is 0% by mass or more, further 1% by mass or more, further 3% by mass or more, further 5% by mass or more, and 50% by mass or less, further 40% by mass or less, and further 30% by mass or less.

[0089] <12> The herbicidal efficacy potentiator composition according to any one of <1> to <11>, wherein the viscosity of the herbicidal efficacy potentiator composition at 25°C is 1 mPa s or more, further 2 mPa s or more, further 5 mPa s or more, and 10,000 mPa s or less, further 5,000 mPa s or less, further 1,000 mPa s or less.

[0090] <13> The herbicidal efficacy enhancer composition according to any one of <1> to <12>, which is for use in an amino acid-based herbicide.

[0091] <14> The herbicidal efficacy potentiator composition according to <13>, wherein the content of the component (A) in the herbicidal efficacy potentiator composition relative to 100 parts by mass of the agricultural chemicals technical grade (active ingredient) of the amino acid herbicide is 0.3 parts by mass or more, further 3 parts by mass or more, and 1,000 parts by mass or less, further 300 parts by mass or less.

[0092] <15> The herbicidal efficacy potentiator composition according to <13> or <14>, wherein the content of the component (B) in the herbicidal efficacy potentiator composition relative to 100 parts by mass of the agricultural chemicals technical grade (active ingredient) of the amino acid herbicide is 0.7 parts by mass or more, further 7 parts by mass or more, and further 1,000 parts by mass or less, further 700 parts by mass or less.

[0093] <16> A herbicide composition comprising the following component (A), the following component (B), and the following component (C):

[0094] Component (A): a compound represented by the following general formula (a1): １ａ O (R ２ａ O) ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ａ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ａ It represents the average number of moles of O, and is 0 or more, further 1 or more, further 2 or more, and 50 or less, further 25 or less, further 20 or less, and further 10 or less. M ａ ＋ represents a counter ion, which is at least one selected from alkali metal ions such as sodium ion and potassium ion, organic ions such as ammonium ion and triethanolammonium ion, and further represents an alkali metal ion, and further represents a sodium ion.

[0095] Component (B): one or more selected from the following component (B1) and the following component (B2); Component (B1): a compound represented by the following general formula (b1): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ｂ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ｂ R represents the average number of moles of O, and is 1 or more, further 2 or more, and 5 or less, further 4 or less, further 3 or less. ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ represents a hydrocarbon group, an alkyl group or an alkenyl group, a linear or branched alkyl group, or a linear alkyl group having 7 or more carbon atoms, and 11 or less, or even 9 or less carbon atoms. M ｂ ＋ represents a counter ion, and is at least one selected from alkali metal ions such as hydrogen ion, sodium ion, and potassium ion, and organic ions such as ammonium ion and triethanolammonium ion, and further represents a hydrogen ion.] Component (C): Agrochemical active ingredient of herbicide

[0096] <17> The herbicide composition according to <16>, wherein the component (C) is at least one selected from (C1) a compound selected from glufosinate and a salt thereof [hereinafter referred to as the component (C1)], and (C2) a compound selected from glyphosate and a salt thereof [hereinafter referred to as the component (C2)], and further selected from (C1) glufosinate and a salt thereof.

[0097] <18> The herbicide composition according to <16> or <17>, wherein the content of the component (A) in the herbicide composition is 0.5% by mass or more, further 1% by mass or more, even 2% by mass or more, and 20% by mass or less, further 15% by mass or less, even 10% by mass or less.

[0098] <19> The herbicide composition according to any one of <16> to <18>, wherein the content of the component (B) in the herbicide composition is 1% by mass or more, further 2% by mass or more, even 5% by mass or more, and 50% by mass or less, further 40% by mass or less, further 30% by mass or less, even 20% by mass or less.

[0099] <20> The herbicide composition according to any one of <16> to <19>, wherein the content of the component (C) in the herbicide composition is 1% by mass or more, further 2% by mass or more, even 5% by mass or more, and 70% by mass or less, further 60% by mass or less, even 50% by mass or less.

[0100] <21> The herbicide composition according to any one of the above <16> to <20>, wherein the component (C) is a component (C1), and the mass ratio of the content of the component (C1) to the total content of the content of the component (A) and the content of the component (B), [(C1) / {(A)+(B)}], is 0.5 or more, further 0.6 or more, further 0.7 or more, and further 3.0 or less, further 2.5 or less, and further 2.0 or less.

[0101] <22> The herbicidal efficacy enhancer composition according to any one of the above items <16> to <21>, further containing water, wherein the content of the water in the herbicidal composition is 0% by mass or more, preferably 0.1% by mass or more, further 0.2% by mass or more, even 0.5% by mass or more, and 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less.

[0102] <23> A herbicide method comprising spraying a herbicide spray liquid containing the following component (A), the following component (B), and the following component (C) on a plant to be controlled:

[0103] Component (A): a compound represented by the following general formula (a1): １ａ O (R ２ａ O) ｌ SO ３－ M ａ ＋ (a1) [wherein, R １ａ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ａ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ａ It represents the average number of moles of O, and is 0 or more, further 1 or more, further 2 or more, and 50 or less, further 25 or less, further 20 or less, and further 10 or less. M ａ ＋ represents a counter ion, which is at least one selected from alkali metal ions such as sodium ion and potassium ion, organic ions such as ammonium ion and triethanolammonium ion, and further represents an alkali metal ion, and further represents a sodium ion.

[0104] Component (B): one or more selected from the following component (B1) and the following component (B2); Component (B1): a compound represented by the following general formula (b1): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ R represents a hydrocarbon group, further an alkyl group or alkenyl group, further a linear or branched alkyl group, further a linear alkyl group having 10 or more carbon atoms, further 11 or more, further 12 or more, and 16 or less, further 15 or less, further 14 or less carbon atoms. ２ｂ represents an alkanediyl group, further an ethanediyl group, having 2 or more carbon atoms, and 4 or less, further 3 or less carbon atoms. ２ｂ R represents the average number of moles of O, and is 1 or more, further 2 or more, and 5 or less, further 4 or less, further 3 or less. ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋(b2) [wherein, R ４ｂ represents a hydrocarbon group, an alkyl group or an alkenyl group, a linear or branched alkyl group, or a linear alkyl group having 7 or more carbon atoms, and 11 or less, or even 9 or less carbon atoms. M ｂ ＋ represents a counter ion, and is at least one selected from alkali metal ions such as hydrogen ion, sodium ion, and potassium ion, and organic ions such as ammonium ion and triethanolammonium ion, and further represents a hydrogen ion.] Component (C): Agrochemical active ingredient of herbicide

[0105] <24> The herbicide method according to <23>, wherein the herbicide spray solution contains water.

[0106] <25> The herbicidal method according to <23> or <24>, wherein the content of the component (A) in the herbicide spray solution is 50 ppm or more, further 100 ppm or more, further 200 ppm or more, and 500 ppm or less, further 400 ppm or less, further 300 ppm or less.

[0107] <26> The weed control method according to any one of <23> to <25>, wherein the content of the component (B) in the herbicide spray solution is 150 ppm or more, further 250 ppm or more, further 350 ppm or more, and 2000 ppm or less, further 900 ppm or less, further 800 ppm or less.

[0108] <27> The weed control method according to any one of <23> to <26>, wherein the content of the component (C) in the herbicide spray solution is 200 ppm or more, further 300 ppm or more, further 500 ppm or more, and 4000 ppm or less, further 3000 ppm or less, further 2000 ppm or less.

[0109] <28> The weed control method according to any one of <23> to <27>, wherein the herbicide spray solution is sprayed at a rate of 1 L / ha or more, further 10 L / ha or more, further 100 L / ha or more, further 500 L / ha or more, and further 5000 L / ha or less, further 2000 L / ha or less, further 1500 L / ha or less, and further 1000 L / ha or less.

[0110] <29> The weed control method according to any one of <23> to <28>, wherein the pH of the herbicide spray solution at 25°C is 1 or more, further 2 or more, and 8 or less, further 6 or less.

[0111] <Ingredients Used> The ingredients used in the Examples and Comparative Examples are as follows: [Component (A)] Compounds shown in Table 1 [Component (B)] Compounds shown in Table 2 [Component (C)] (C-1) Glufosinate ammonium salt (C-2) Glyphosate isopropylamine salt

[0112]

[0113]

[0114] Example 1 and Comparative Example 1 (1) Preparation of test solutions of herbicidal efficacy potentiator compositions Component (A) or (A') shown in Table 1 and component (B) or (B') shown in Table 2 were added to an appropriate amount of water (tap water) to prepare herbicidal efficacy potentiator compositions. Next, the compositions were mixed with water to prepare test solutions of herbicidal efficacy potentiator compositions shown in Table 3. The content (ppm) of each component in the test solutions was as shown in Table 3. Note that the mass % of each component in Table 3 is all based on the active component (the mass of the compound used).

[0115] (2) Evaluation of Wettability The test plant used was the upper surface of the fifth leaf of barnyard grass (variety: green millet) at the eight-leaf stage grown in a 12 cm pot. Five 5 μL droplets of the test solution of the herbicidal efficacy enhancer composition of the present invention shown in Table 3 were dropped onto the center of the upper surface of the leaf. After 1 minute, the major and minor axes of each droplet were measured with a vernier caliper, and the area (mm ) of the droplet spread out as a rectangle was calculated. ２ ) was measured. The average of the five measured areas is shown in Table 3. The larger the area, the greater the effect of wettability on the plant leaf surface. As a result, as shown in Table 3, it was confirmed that the herbicidal efficacy enhancer composition of the present invention can dramatically improve wettability.

[0116]

[0117] Example 2 and Comparative Example 2 (3) Preparation of spray solution of herbicide composition shown in Table 4 Glufosinate ammonium salt (C-1) was used as the agrochemical active ingredient, which is the component (C) of the present invention, and was diluted with water to the active ingredient concentration shown in Table 4. A herbicidal efficacy enhancer composition shown in Table 3 was mixed therewith so that the content of each component became the active ingredient concentration shown in Table 4, thereby preparing a spray solution of the herbicide composition. The content of each component in the spray solution was the content (ppm) shown in Table 4.

[0118] (4) Herbicide Test (Glufosinate Test) As test plants, barnyard millet (variety: green millet) with a plant height of about 20 cm, grown in 12 cm pots, was prepared in five pots for each plot. ２ The plants were arranged at equal intervals between the test plants, and 100 mL of the herbicide composition spray solution prepared in (3) above (1000 L / ha as spray water volume) was sprayed onto the leaves using a trigger sprayer so that the entire plant was covered. The plants were then placed in a glass greenhouse (23°C) and allowed to stand for 14 days. 14 days after spraying, the above-ground parts of the test plants were harvested and the fresh weight (g) of the above-ground parts was measured. The average fresh weight of the above-ground parts of the five pots was taken as the "fresh weight of the above-ground parts of the treated area." The herbicidal rate based on the fresh weight of the above-ground parts of the untreated area was calculated according to the following formula. Here, the untreated area (1 m ２ The "untreated plot" (five pots arranged at equal intervals in a square sphere) refers to the plot to which the herbicide composition spray solution prepared in (3) above was not sprayed, and the average fresh weight of the aboveground parts of the five pots in the untreated plot was taken as the "fresh weight of the aboveground parts of the untreated plot." The calculated herbicidal rates (%) are shown in Table 4. A higher herbicidal rate indicates a higher herbicidal effect.

[0119] Herbicide rate (%) = [(fresh weight of above-ground part of untreated area - fresh weight of above-ground part of treated area) / fresh weight of above-ground part of untreated area] x 100

[0120]

[0121] The results in Table 4 confirm that the herbicidal efficacy of the herbicidal composition of the present invention can be enhanced. It was also confirmed that the wettability evaluation of the herbicidal composition of the present invention containing (C-1) glufosinate ammonium salt as the agrochemical active ingredient, which is the component (C) in the present invention, correlates with the wettability evaluation of the herbicidal efficacy enhancer composition of the present invention (Table 3).

[0122] Example 3 and Comparative Example 3 (5) Preparation of spray solution of herbicide composition shown in Table 5 A spray solution of the herbicide composition shown in Table 5 was prepared in the same manner as in (3) above, except that (C-2) glyphosate isopropylamine salt was used instead of (C-1) shown in (3) above as the agricultural chemical technical ingredient (C) of the present invention. The content of each component in the spray solution was the content (ppm) shown in Table 5.

[0123] (6) Herbicidal test (glyphosate test) The test method was the same as in (4) Herbicidal test (glufosinate test). The herbicidal rate (%) calculated in the same manner as in (4) above is shown in Table 5.

[0124]

[0125] The results in Table 5 confirm that the herbicidal efficacy of the herbicidal composition of the present invention can be enhanced. Furthermore, it was confirmed that the wettability evaluation of the herbicidal composition of the present invention containing (C-2) glyphosate isopropylamine salt as the agricultural chemical active ingredient of the herbicide (component (C)) in the present invention correlates with the wettability evaluation of the herbicidal efficacy enhancer composition of the present invention (Table 3).

Claims

1. A herbicidal efficacy enhancer composition comprising the following component (A) and component (B): Component (A): a compound represented by the following general formula (a1): R １ａ O (R ２ａ O) ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ａ is an alkanediyl group having 2 to 4 carbon atoms, and l is R ２ａ The average number of moles of O is 0 to 50, ａ ＋ represents a counter ion.] Component (B): one or more selected from the following component (B1) and the following component (B2) Component (B1): a compound represented by the following general formula (b): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ｂ is an alkanediyl group having 2 to 4 carbon atoms, m is R ２ｂ The average number of moles of O is 1 to 5, and R ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ is a hydrocarbon group having 7 to 11 carbon atoms, M ｂ ＋ indicates a counter ion.

2. The herbicidal efficacy enhancer composition according to claim 1, which is for use with amino acid-based herbicides.

3. A herbicidal efficacy enhancer composition described in claim 1 or 2, wherein the mass ratio of the content of the (A) component to the content of the (B) component [(A) / (B)] is 0.05 or more and 0.7 or less.

4. A herbicidal efficacy enhancer composition described in claim 1 or 2, wherein the content of component (A) in the herbicidal efficacy enhancer composition is 5% by mass or more and 50% by mass or less.

5. A herbicidal efficacy enhancer composition described in claim 1 or 2, wherein the content of component (B) in the herbicidal efficacy enhancer composition is 30% by mass or more and 90% by mass or less.

6. A herbicidal composition comprising the following component (A), component (B), and component (C): Component (A): a compound represented by the following general formula (a1): R １ａ O (R ２ａ O) ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ａ is an alkanediyl group having 2 to 4 carbon atoms, and l is R ２ａ The average number of moles of O is 0 to 50, ａ ＋ represents a counter ion.] Component (B): one or more selected from the following component (B1) and the following component (B2) Component (B1): a compound represented by the following general formula (b): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ｂ is an alkanediyl group having 2 to 4 carbon atoms, m is R ２ｂ The average number of moles of O is 1 to 5, and R ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ is a hydrocarbon group having 7 to 11 carbon atoms, M ｂ ＋ indicates a counter ion.] Component (C): Agrochemical active ingredient of herbicide 7. The herbicide composition according to claim 6, wherein the component (C) is an agricultural chemical active ingredient of an amino acid-based herbicide.

8. A herbicide composition according to claim 6 or 7, wherein the mass ratio of the content of the (C) component to the total content of the (A) component and the (B) component, [(C) / {(A)+(B)}], is 0.5 or more and 3 or less.

9. The herbicidal composition according to claim 6 or 7, further comprising water.

10. A herbicidal method comprising spraying a herbicide spray solution containing the following component (A), the following component (B), and the following component (C) on a target plant. Component (A): A compound represented by the following general formula (a1): R １ａ O (R ２ａ O) ｌ SO ３ － M ａ ＋ (a1) [wherein, R １ａ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ａ represents an alkanediyl group having 2 to 4 carbon atoms, l represents the average number of moles, and M ａ ＋ represents a counter ion.] Component (B): one or more selected from the following component (B1) and the following component (B2) Component (B1): a compound represented by the following general formula (b): R １ｂ O (R ２ｂ O) ｍ R ３ｂ (b1) [wherein, R １ｂ is a hydrocarbon group having 10 to 16 carbon atoms, R ２ｂ represents an alkanediyl group having 2 to 4 carbon atoms, m represents the average number of moles of 1 to 5, R ３ｂ represents a hydrogen atom or a methyl group.] Component (B2): a compound represented by the following general formula (b2): R ４ｂ -COO － M ｂ ＋ (b2) [wherein, R ４ｂ is a hydrocarbon group having 7 to 11 carbon atoms, M ｂ ＋ indicates a counter ion.] Component (C): Agrochemical active ingredient of herbicide 11. The herbicidal method according to claim 10, wherein a herbicide spray solution further containing water is sprayed onto the plants.

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