How to sterilize plants

Abstract

The present invention provides: a plant bactericide composition which has outstanding bactericidal performance against a wide range of bacteria, including resistant bacteria and the like, does not cause chemical harm to plants, has outstanding preparation return properties, and is environmentally friendly and safe; a plant bactericide treatment liquid which has outstanding bactericidal performance against a wide range of bacteria, including resistant bacteria and the like, does not cause chemical harm to plants, and is environmentally friendly and safe; and a method for sterilizing plants using the same.　The method for sterilizing plants includes a step for applying, to a plant, the plant bactericide treatment liquid, which contains (A) a straight-chain aliphatic alcohol with a carbon number of 8-12, inclusive, as a bactericidal component (henceforth component (A)), (B) a polyoxyalkylene sorbitan fatty acid ester (henceforth component (B)), and water, the mass ratio (B) / (A) of the component (A) content and the component (B) content being 0.05-0.9, inclusive.

Description

[Technical Field]

[0001] The present invention relates to a method for sterilizing plants that takes into consideration the environment and safety.

[0002] Background technology Plant pathogens cause significant harm to agricultural and horticultural plants, stunting their growth and reducing their quality. Currently, synthetic chemical pesticides, such as organochlorine (TPN, captan), benzimidazole, acid amide, guanidine, carbamate, organophosphate, and organocopper pesticides, are primarily used to control pathogens. Because excessive application of synthetic chemical pesticides can lead to the development of drug resistance in pathogens, safer pesticides that are less susceptible to drug resistance are desired. Furthermore, excessive application of synthetic chemical pesticides raises concerns about the environmental impact and the strain on workers.

[0003] Japanese Patent Application Laid-Open No. 2012-181487 discloses a pesticide efficacy enhancer composition containing one or more compounds (A) selected from specific ethoxylate compounds, specific polyoxyethylene fatty acid esters, specific polyoxyethylene sorbitan fatty acid esters, specific (poly)glycerin fatty acid esters, and specific alkyl saccharides, and one or more compounds (B) selected from alcohols having a linear or branched alkyl group having 8 to 14 carbon atoms. Japanese Patent Application Laid-Open No. 2014-125445 discloses an agrochemical composition containing, under specific conditions, one or more compounds (A) selected from a specific ethoxylate compound, a specific polyoxyethylene fatty acid ester, a specific polyoxyethylene sorbitan fatty acid ester, a specific (poly)glycerin fatty acid ester, and a specific alkyl saccharide; a specific alkoxylate compound containing a propyleneoxy group or a specific fatty alcohol (B); a specific amine surfactant (C); a specific agrochemical active ingredient (D); and water. Japanese Patent Application Laid-Open Publication No. 2015-54830 discloses a method for sterilizing plants, which includes a step of applying to plants a treatment solution that is substantially free of any agricultural chemical active ingredient selected from among the active ingredients of fungicides, and that contains one or more compounds (A) selected from (A1) specific polyoxyethylene fatty acid esters and (A2) specific (poly)glycerin fatty acid esters, (B1) one or more compounds (B) selected from specific aliphatic alcohols, and water, wherein the total content of compound (A) and compound (B) is within a predetermined range. JP 2005-504102 A describes a composition comprising: (i) an effective amount of at least one essential oil component; or a derivative thereof obtained by irradiation with light or oxidation, or a mixture thereof; and (ii) at least one additional stabilizer selected from the group consisting of ethanol, an emulsifier, an antioxidant, or an encapsulating agent in an amount of 10% to about 50%.

[0004] Summary of the Invention Plant fungicide compositions containing agricultural chemical raw materials such as conventional fungicides act by inhibiting the biochemical reactions of fungal cells, and therefore, when genes that affect the biochemical reactions of fungal cells are modified, resistant bacteria are likely to emerge, reducing the fungicidal effect of the plant fungicide composition and resulting in reduced plant yields. Furthermore, conventional plant fungicide compositions containing agricultural chemicals such as fungicides have a relatively low safety level due to the inclusion of agricultural chemicals, and since the agricultural chemicals remain on the surface of plants, restrictions are placed on their use before the harvest of plants, meaning that they cannot be used even if a disease occurs before the plant is harvested.

[0005] The present invention provides a plant fungicide composition that has excellent bactericidal activity against a wide range of bacteria including resistant bacteria, is not phytotoxic to plants, has excellent formulation reversibility, and is environmentally and safety-conscious; a plant fungicide treatment solution that has excellent bactericidal activity against a wide range of bacteria including resistant bacteria, is not phytotoxic to plants, and is environmentally and safety-conscious; and a plant sterilization method using the same.

[0006] The present invention relates to a plant fungicide composition containing (A) a straight-chain aliphatic alcohol having from 8 to 12 carbon atoms as a fungicidal component (hereinafter referred to as component (A)), and (B) a polyoxyalkylene sorbitan fatty acid ester (hereinafter referred to as component (B)), wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less.

[0007] The present invention also relates to a plant fungicide treatment solution containing component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less.

[0008] The present invention also relates to a method for sterilizing plants, which includes a step of applying to plants a plant fungicide treatment solution containing component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less.

[0009] The present invention also relates to a method for sterilizing plants, which comprises the step of applying to plants a plant fungicide treatment solution consisting essentially of component (A), component (B), optionally a solvent (C), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less.

[0010] According to the present invention, there are provided a plant fungicide composition which has excellent bactericidal performance against a wide range of bacteria including resistant bacteria, is not phytotoxic to plants, has excellent formulation reversibility, and is environmentally and safety-conscious; a plant fungicide treatment solution which has excellent bactericidal performance against a wide range of bacteria including resistant bacteria, is not phytotoxic to plants, and is environmentally and safety-conscious; and a plant sterilization method using the same. [Brief explanation of the drawings]

[0011] [Figure 1] Photographs that serve as the criteria for the plant phytotoxicity test in the examples

[0012] MODE FOR CARRYING OUT THE INVENTION [Plant fungicide composition] The reason why the plant fungicide composition of the present invention has excellent fungicidal activity against a wide range of bacteria, including resistant bacteria, is not entirely clear, but is presumed to be as follows. Plant fungicide compositions containing agricultural chemicals such as conventional fungicides act by inhibiting the biochemical reactions of fungal cells, and therefore have the problem of easily generating resistant bacteria when a small number of genes that affect the biochemical reactions of fungal cells are altered, resulting in a reduction in the fungicidal effect of the plant fungicide composition. On the other hand, the plant fungicide composition of the present invention containing components (A) and (B) acts on the entire fungal cell membrane, destroying its structure and thereby killing bacteria. Therefore, the emergence of resistant bacteria requires multiple gene mutations, and the risk of resistant bacteria emerging is low. Furthermore, even if resistant bacteria do emerge, the fungicide composition acts on the entire cell membrane, so it is thought that the fungicidal effect will not be lost. Furthermore, the plant fungicide composition of the present invention uses component (A), a food additive compound, as the fungicidal component, and does not require general agricultural chemical ingredients such as other fungicides. Therefore, it is environmentally friendly and safe, and can be used before the harvest of plants. The mechanism by which the plant fungicide composition of the present invention exhibits a fungicidal effect is presumed to be as follows. Component (A), an aliphatic alcohol having a specific carbon number, of the present invention has a moderate interaction with the fungal cell surface and a fungal cell membrane penetration ability, so it easily adsorbs to the fungal cell surface and penetrates the fungal cell membrane, destroying the cell membrane and exerting a bactericidal effect. Furthermore, component (B) of the present invention has a moderate HLB and molecular exclusive area, so when components (A) and (B) are adsorbed to the fungal cell surface at a specific mass ratio, it has the effect of making component (A) more easily penetrate the cell membrane. It is presumed that the excellent bactericidal effect of the plant fungicide composition of the present invention is due to the synergistic effect of components (A) and (B).

[0013] <Component (A)> The component (A) of the present invention is a linear aliphatic alcohol having a carbon number of 8 to 12. The component (A) functions as a disinfectant component. The number of carbon atoms in the (A) component is 8 or more and 12 or less, and preferably 10, from the viewpoint of antiseptic effect.

[0014] The component (A) is preferably a compound represented by the following general formula (A1). R 1a -OH (A1) (In the formula, R 1a is a linear alkyl group having 8 to 12 carbon atoms, or a linear alkenyl group having 8 to 12 carbon atoms.

[0015] In general formula (A1), R 1a The number of carbon atoms in R is 8 or more and 12 or less, preferably 10, from the viewpoint of bactericidal effect and reversibility of the formulation. 1a is preferably a straight chain alkyl group.

[0016] The component (A) is preferably at least one selected from octanol, decanol, and dodecanol, more preferably at least one selected from octanol and decanol, and even more preferably decanol.

[0017] When component (A) contains decanol, the content of decanol in component (A) is preferably 50 mol% or more, more preferably 80 mol% or more, even more preferably 90 mol% or more, still more preferably 99 mol% or more, and is 100 mol% or less, or may be 100 mol%.

[0018] The plant fungicide composition of the present invention contains component (A) in an amount of preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, and even more preferably 40% by mass or more from the viewpoint of fungicidal effect, and preferably 99% by mass or less, more preferably 95% by mass or less, and even more preferably 90% by mass or less from the viewpoint of formulation reversibility.

[0019] <(B) component> Component (B) of the present invention is a polyoxyalkylene sorbitan fatty acid ester, which has the effect of facilitating the penetration of component (A), a bactericidal component, into the cell membrane of bacteria.

[0020] From the viewpoints of bactericidal effect, formulation reversibility, and phytotoxicity, the carbon number of the raw material fatty acid of component (B) is preferably 8 or more, more preferably 10 or more, even more preferably 12 or more, still more preferably 14 or more, still more preferably 16 or more, and preferably 24 or less, more preferably 20 or less, still more preferably 18 or less, and still more preferably 18. From the viewpoints of bactericidal effect, formulation reversibility, and phytotoxicity, the raw material fatty acid of component (B) preferably has a linear or branched alkyl group or a linear or branched alkenyl group, more preferably has a linear alkyl group or alkenyl group, and even more preferably has a linear alkenyl group. The raw material fatty acid of component (B) refers to a fatty acid residue chemically bonded to sorbitan. The raw material fatty acid of component (B) is preferably one or more selected from lauric acid, palmitic acid, stearic acid, and oleic acid, more preferably one or more selected from lauric acid and oleic acid, and even more preferably oleic acid. The alkylene oxide of component (B) is preferably ethylene oxide or propylene oxide, more preferably ethylene oxide, from the viewpoints of bactericidal effect and preparation reversibility. From the viewpoint of bactericidal effect and formulation reversibility, the average number of moles of alkylene oxide added in component (B) is preferably 5 or more, more preferably 10 or more, even more preferably 15 or more, and preferably 100 or less, more preferably 60 or less, even more preferably 40 or less, still more preferably 30 or less, and even more preferably 25 or less. The degree of esterification of the component (B) is preferably 1 or more and 3 or less, and more preferably 1.

[0021] From the viewpoints of bactericidal effect and formulation reversibility, component (B) is preferably a polyoxyalkylene sorbitan fatty acid monoester having a fatty acid carbon number of 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, and further preferably 18, and an average number of added moles of alkylene oxide of 5 or more, preferably 10 or more, more preferably 15 or more, and 100 or less, preferably 60 or less, more preferably 40 or less, even more preferably 30 or less, and still further preferably 25 or less.

[0022] From the viewpoints of bactericidal effect and formulation reversibility, component (B) is preferably a polyoxyethylene sorbitan fatty acid monoester having a fatty acid carbon number of 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, and further preferably 18, and having an average number of moles of ethylene oxide added of 5 or more, preferably 10 or more, more preferably 15 or more, and 100 or less, preferably 60 or less, more preferably 40 or less, even more preferably 30 or less, and still further preferably 25 or less.

[0023] When a polyoxyethylene sorbitan fatty acid monoester is contained as component (B), the content of the polyoxyethylene sorbitan fatty acid monoester in component (B) is preferably 50 mol% or more, more preferably 80 mol% or more, even more preferably 90 mol% or more, still more preferably 99 mol% or more, and is 100 mol% or less, and may be 100 mol%.

[0024] The plant fungicide composition of the present invention contains component (B) in an amount of preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more from the viewpoint of formulation reversibility, and preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less from the viewpoint of fungicidal effect.

[0025] In the plant fungicide composition of the present invention, the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is, from the viewpoints of fungicidal effect, formulation reversibility, and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0026] When component (A) contains decanol (hereinafter referred to as component (A1)), in the plant fungicide composition of the present invention, the mass ratio (B) / (A1) of the content of component (A1) to the content of component (B) is, from the viewpoints of fungicidal effect, formulation reversibility, and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0027] When component (B) contains polyoxyethylene sorbitan monooleate (hereinafter referred to as component (B1)), in the plant fungicide composition of the present invention, the mass ratio (B1) / (A) of the content of component (A) to the content of component (B1) is, from the viewpoints of fungicidal effect, formulation reversibility, and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0028] When component (A) contains component (A1) and component (B) contains component (B1), in the plant fungicide composition of the present invention, the mass ratio of the content of component (A1) to the content of component (B1), (B1) / (A1), is, from the viewpoints of fungicidal effect, formulation reversibility, and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0029] <(C) component> From the viewpoint of formulation reversibility, the plant fungicide composition of the present invention preferably further contains a solvent as component (C).

[0030] Component (C) can be one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, ethyl lactate, propanol, ethylene glycol, diethylene glycol, propylene glycol, glycerin, ethyl acetate, methanol, ethanol, butyl acetate, methyl lactate, and butyl lactate. From the viewpoint of bactericidal effect and formulation reversibility, one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, ethyl lactate, propanol, ethylene glycol, diethylene glycol, propylene glycol, and glycerin are preferred, and one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, and ethyl lactate are more preferred.

[0031] From the viewpoint of formulation reversibility, the plant fungicide composition of the present invention contains component (C) in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, still more preferably 20% by mass or more, even more preferably 25% by mass or more, still more preferably 30% by mass or more, and preferably 70% by mass or less, more preferably 60% by mass or less, even more preferably 50% by mass or less, still more preferably 45% by mass or less, and still more preferably 40% by mass or less.

[0032] From the viewpoints of the environment and safety, the plant fungicide composition of the present invention preferably does not substantially contain any agricultural chemical active ingredients selected from the active ingredients of fungicides, insecticides, miticides, and herbicides, and more preferably does not substantially contain any agricultural chemical active ingredients containing a fungicide other than component (A) as an active ingredient. Here, agricultural chemical active ingredients refer to the active ingredient of an agricultural chemical. Examples of agricultural chemical active ingredients include those listed in the 2011 edition of the Pesticide Handbook (published by the Japan Plant Protection Association on February 25, 2011). However, component (A) is excluded from agricultural chemical active ingredients.

[0033] From the viewpoints of the environment and safety, the plant fungicide composition of the present invention preferably does not substantially contain any agricultural chemical raw materials selected from the active ingredients of fungicides, insecticides, miticides, and herbicides, and more preferably does not substantially contain any agricultural chemical raw materials containing a fungicide other than component (A) as an active ingredient. That is, the present invention provides a plant fungicide composition consisting essentially of component (A), component (B), and optionally component (C). Here, in the plant fungicide composition of the present invention, "essentially" means that the composition may contain components other than component (A), component (B), and component (C) to the extent that the action and effects of the present invention are not affected, but does not contain any components that affect the action and effects of the present invention, such as agricultural chemicals containing fungicides other than component (A) and component (B) as active ingredients.

[0034] In the plant fungicide composition of the present invention, the content of any agricultural chemical raw material selected from the active ingredients of fungicides, insecticides, miticides, and herbicides is, from the viewpoint of formulation reversibility, preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 2.5% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.1% by mass or less. In the plant fungicide composition of the present invention, the content of the agricultural chemical raw material having a fungicide other than component (A) as an active ingredient is preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably 2.5% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.1% by mass or less, from the viewpoint of formulation reversibility.

[0035] Examples of fungicides include those described in paragraph 0043 of WO 2012 / 029893. Examples of insecticides include those described in paragraphs 0044 to 0045 of WO 2012 / 029893. Examples of acaricides include those described in paragraph 0046 of WO 2012 / 029893. Examples of herbicides include those described in paragraph 0047 of WO 2012 / 029893.

[0036] In the plant fungicide composition of the present invention, the total content of components (A) and (B) is, from the viewpoint of formulation reversibility, preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, still more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less. When the plant fungicide composition of the present invention contains component (C), the total content of components (A), (B), and (C) is, from the viewpoint of formulation reversibility, preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, still more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less.

[0037] The plant fungicide composition of the present invention may contain, for example, antioxidants, preservatives, agents to prevent accidental ingestion, colorants, thickeners, bulking agents, stabilizers, emulsifiers, nutrients, pigments, fragrances, plant growth regulators, fertilizers, and the like, within ranges that do not impair the effects of the present invention.

[0038] Examples of plant growth regulators include those described in paragraph 0049 of WO 2012 / 029893.

[0039] [Fungicide treatment solution for plants] The present invention relates to a plant fungicide treatment solution containing component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less. The plant fungicide treatment solution of the present invention may be prepared by mixing the plant fungicide composition of the present invention with water. In the plant fungicide treatment solution of the present invention, the aspects of the components (A) and (B) are the same as those described in the plant fungicide composition of the present invention. The plant fungicide treatment solution of the present invention may further contain component (C). In the plant fungicide treatment solution of the present invention, the embodiment of component (C) is the same as that described for the plant fungicide composition of the present invention. The plant fungicide treatment solution of the present invention can be applied appropriately to the aspects described for the plant fungicide composition of the present invention.

[0040] In the plant fungicide treatment solution of the present invention, the content of component (A) is, from the viewpoint of fungicidal effect and phytotoxicity, preferably 20 ppm or more, more preferably 50 ppm or more, even more preferably 100 ppm or more, still more preferably 200 ppm or more, and preferably 2000 ppm or less, more preferably 1200 ppm or less, even more preferably 900 ppm or less.

[0041] In the plant fungicide treatment solution of the present invention, the content of component (B) is preferably 10 ppm or more, more preferably 20 ppm or more, even more preferably 50 ppm or more, from the viewpoints of fungicidal effect and phytotoxicity, and is preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 300 ppm or less.

[0042] In the plant fungicide treatment solution of the present invention, the total content of component (A) and component (B) is, from the viewpoint of fungicidal effect and phytotoxicity, preferably 30 ppm or more, more preferably 50 ppm or more, even more preferably 100 ppm or more, still more preferably 200 ppm or more, still more preferably 250 ppm or more, and preferably 2000 ppm or less, more preferably 1200 ppm or less, and even more preferably 900 ppm or less.

[0043] In the plant fungicide treatment solution of the present invention, the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is, from the viewpoints of fungicidal effect and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and even more preferably 0.4 or less.

[0044] When component (A) contains decanol (hereinafter referred to as component (A1)), in the plant fungicide treatment solution of the present invention, the mass ratio (B) / (A1) of the content of component (A1) to the content of component (B) is, from the viewpoints of fungicidal effect and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0045] When component (B) contains polyoxyethylene sorbitan monooleate (hereinafter referred to as component (B1)), in the plant fungicide treatment solution of the present invention, the mass ratio (B1) / (A) of the content of component (A) to the content of component (B1) is, from the viewpoints of fungicidal effect and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0046] When component (A) contains component (A1) and component (B) contains component (B1), in the plant fungicide treatment solution of the present invention, the mass ratio of the content of component (A1) to the content of component (B1), (B1) / (A1), is, from the viewpoints of fungicidal effect and phytotoxicity, 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less.

[0047] When the plant fungicide treatment solution of the present invention contains component (C), the content of component (C) is, from the viewpoint of fungicidal effect and phytotoxicity, preferably 10 ppm or more, more preferably 40 ppm or more, even more preferably 80 ppm or more, still more preferably 150 ppm or more, and preferably 1500 ppm or less, more preferably 1000 ppm or less, even more preferably 700 ppm or less, still more preferably 500 ppm or less, and still more preferably 300 ppm or less.

[0048] From the viewpoints of the environment and safety, the plant fungicide treatment solution of the present invention preferably does not substantially contain any agricultural chemical raw materials selected from the active ingredients of fungicides, insecticides, miticides, and herbicides, and more preferably does not substantially contain any agricultural chemical raw materials containing a fungicide other than component (A) as an active ingredient. That is, the present invention provides a fungicide treatment solution for plants consisting essentially of component (A), component (B), optionally component (C), and water. Here, in the plant fungicide treatment solution of the present invention, "essentially" means that the solution may contain components other than component (A), component (B), component (C), and water, as long as the components do not affect the action and effects of the present invention, but does not contain any components that affect the action and effects of the present invention, such as agricultural chemicals containing fungicides other than component (A) and component (B) as active ingredients. The embodiment of the agricultural chemical raw material is the same as that described in the plant fungicide composition of the present invention.

[0049] In the plant fungicide treatment solution of the present invention, the content of any agricultural chemical raw material selected from the active ingredients of fungicides, insecticides, miticides, and herbicides is, from the viewpoint of fungicidal effect and phytotoxicity, preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 100 ppm or less, still more preferably 50 ppm or less, still more preferably 25 ppm or less, still more preferably 10 ppm or less, still more preferably 5 ppm or less, and still more preferably 1 ppm or less. In the plant fungicide treatment solution of the present invention, the content of the agricultural chemical raw material having a fungicide other than component (A) as an active ingredient is preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 100 ppm or less, still more preferably 25 ppm or less, still more preferably 50 ppm or less, still more preferably 10 ppm or less, still more preferably 5 ppm or less, and still more preferably 1 ppm or less, from the viewpoint of fungicidal effect and phytotoxicity.

[0050] In the plant fungicide treatment solution of the present invention, the proportion of component (A) and component (B) among the components other than water in the treatment solution is, from the viewpoint of fungicidal effect and phytotoxicity, preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, still more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less. When the plant fungicide treatment solution of the present invention contains component (C), the proportions of components (A), (B), and (C) among the components other than water in the treatment solution are, from the viewpoints of fungicidal effect and phytotoxicity, preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, still more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less.

[0051] The plant fungicide treatment solution of the present invention may contain, for example, antioxidants, preservatives, agents to prevent accidental ingestion, colorants, thickeners, bulking agents, stabilizers, emulsifiers, nutrients, pigments, fragrances, plant growth regulators, fertilizers, etc., within the range that does not impair the effects of the present invention.

[0052] [Method for sterilizing plants] The present invention relates to a method for sterilizing plants, which comprises a step of applying the plant fungicide treatment solution of the present invention to plants. That is, the present invention relates to a method for sterilizing plants, which comprises a step of applying to plants a plant fungicide treatment solution containing component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less. The present invention also relates to a method for sterilizing plants, which comprises the step of applying to plants a plant fungicide treatment solution consisting essentially of component (A), component (B), optionally a solvent (C), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less. The plant sterilization method of the present invention can appropriately apply the aspects described for the plant fungicide composition of the present invention and the plant fungicide treatment solution of the present invention.

[0053] The step of applying the plant fungicide treatment liquid of the present invention to plants includes, for example, (1) spraying the treatment solution onto plants, for example, onto the leaves, stems, or fruits of plants, using a hand sprayer, boom sprayer, aerial sprayer, or the like; (2) applying the treatment solution directly to plants, such as leaves, stems, and fruits; (3) applying the treatment solution to the roots of plants by irrigating the soil with the solution using a liquid fertilizer supplying device or the like; (4) A step of applying the treatment solution to the roots as a hydroponic culture solution in hydroponic culture. As in (1), a step of spraying the treatment solution on plants is preferred.

[0054] From the viewpoint of improving the fungicidal effect, the plant fungicide treatment solution of the present invention can be sprayed at a rate of preferably 3 L / 10 a or more, more preferably 5 L / 10 a or more, more preferably 7 L / 10 a or more, even more preferably 10 L / 10 a or more, even more preferably 20 L / 10 a or more, even more preferably 30 L / 10 a or more, even more preferably 40 L / 10 a or more, and from the viewpoint of improving the fungicidal effect and economic efficiency, it can be sprayed at a rate of preferably 300 L / 10 a or less, more preferably 250 L / 10 a or less, more preferably 200 L / 10 a or less, more preferably 150 L / 10 a or less, even more preferably 120 L / 10 a or less.

[0055] Plants that can be sterilized by the plant sterilization method of the present invention include plants cultivated as agricultural crops. Specific examples of fruit vegetables include cucumber, pumpkin, watermelon, melon, tomato, eggplant, bell pepper, strawberry, okra, green beans, broad beans, peas, edamame, and corn. Leaf vegetables include Chinese cabbage, lettuce, spinach, cabbage, cauliflower, broccoli, Brussels sprouts, onion, leek, garlic, shallot, chive, asparagus, lettuce, lettuce, celery, spinach, garland chrysanthemum, parsley, mitsuba, water dropwort, udo, mioga, butterbur, and shiso. Root vegetables include radish, turnip, burdock, carrot, potato, taro, sweet potato, yam, ginger, and lotus root. Other examples include rice, wheat, and ornamental plants. It can also be used on plants of the genus Oil Palm, such as the American oil palm and the Guinea palm, and on plants of the Arecaceae family, such as the coconut palm.

[0056] The plant sterilization method of the present invention comprises: a filamentous fungus that causes plant diseases selected from leaf rot, rice brown spot, vegetable seedling damping-off, cucumber anthracnose, cabbage black soot, rice seedling disease, apple black spot, apple anthracnose, apple rot, apple molinia, melon vine wilt, powdery mildew that infects various plants, radish yellows fungus, onion gray rot, pear black spot, and sugar beet brown spot fungus, A chemical pesticide-resistant fungus (filamentous fungus) that causes plant diseases selected from apple leaf spot, persimmon gray mold, pepper spot, tomato gray mold, and wheat eyespot, Bacteria that cause plant diseases selected from bok choy soft rot, taro soft rot, peach bacterial bore, etc., and Mushroom fungi selected from Ganoderma, Coriolus versicolor, Coriolus versicolor, etc. It is preferable to kill one or more bacteria selected from the following.

[0057] In the plant sterilization method of the present invention, it is preferable to apply the plant fungicide treatment solution of the present invention to a plant under cultivation, and more preferably to spray the treatment solution on the leaves of the plant under cultivation.

[0058] In relation to the above-mentioned embodiment, the present invention further discloses the following method for sterilizing plants.

[0059] <1> A method for sterilizing plants, comprising the step of applying to plants a plant fungicide treatment solution containing (A) a straight-chain aliphatic alcohol having from 8 to 12 carbon atoms as a fungicidal component (hereinafter referred to as component (A)) and (B) a polyoxyalkylene sorbitan fatty acid ester (hereinafter referred to as component (B)), wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less.

[0060] <2> The component (A) is a compound represented by the following general formula (A1): <1> The method for sterilizing plants according to claim 1. R 1a -OH (A1) (In the formula, R 1a is a linear alkyl group having 8 to 12 carbon atoms, or a linear alkenyl group having 8 to 12 carbon atoms.

[0061] <3> The component (A) is one or more selected from octanol, decanol, and dodecanol, preferably one or more selected from octanol and decanol, and more preferably decanol. <1> or <2> The method for sterilizing plants according to claim 1.

[0062] <4> The component (A) contains decanol, and the content of decanol in the component (A) is preferably 50 mol% or more, more preferably 80 mol% or more, even more preferably 90 mol% or more, and still more preferably 99 mol% or more and 100 mol% or less. <1> ~ <3> 10. The method for sterilizing plants according to any one of the above.

[0063] <5> The component (B) is a polyoxyalkylene sorbitan fatty acid monoester having a fatty acid carbon number of 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, and even more preferably 18, and an average number of moles of alkylene oxide added of 5 or more, preferably 10 or more, more preferably 15 or more, and 100 or less, preferably 60 or less, more preferably 40 or less, even more preferably 30 or less, and still more preferably 25 or less. <1> ~ <4> 10. The method for sterilizing plants according to any one of the above.

[0064] <6> The component (B) is a polyoxyethylene sorbitan fatty acid monoester having a fatty acid carbon number of 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, and even more preferably 18, and an average number of moles of ethylene oxide added of 5 or more, preferably 10 or more, more preferably 15 or more, and 100 or less, preferably 60 or less, more preferably 40 or less, even more preferably 30 or less, and still more preferably 25 or less. <1> ~ <5> 10. The method for sterilizing plants according to any one of the above.

[0065] <7> In the plant fungicide treatment solution, the mass ratio (B) / (A) of the content of the component (A) to the content of the component (B) is 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less. <1> ~ <6> 10. The method for sterilizing plants according to any one of the above.

[0066] <8> In the plant fungicide treatment solution, the component (A) contains decanol (hereinafter referred to as component (A1)), and the mass ratio (B) / (A1) of the content of the component (A1) to the content of the component (B) is 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less. <1> ~ <7> 10. The method for sterilizing plants according to any one of the above.

[0067] <9> In the plant fungicide treatment solution, the component (B) contains polyoxyethylene sorbitan monooleate (hereinafter referred to as component (B1)), and the mass ratio (B1) / (A) of the content of the component (A) to the content of the component (B1) is 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less. <1> ~ <8> 10. The method for sterilizing plants according to any one of the above.

[0068] <10> In the plant fungicide treatment solution, the component (A) contains the component (A1), the component (B) contains the component (B1), and the mass ratio (B1) / (A1) of the content of the component (A1) to the content of the component (B1) is 0.05 or more, preferably 0.1 or more, more preferably 0.2 or more, and 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, still more preferably 0.5 or less, and still more preferably 0.4 or less. <8> or <9> The method for sterilizing plants according to claim 1.

[0069] <11> The content of component (A) in the plant fungicide treatment solution is preferably 20 ppm or more, more preferably 50 ppm or more, even more preferably 100 ppm or more, still more preferably 200 ppm or more, and preferably 2000 ppm or less, more preferably 1200 ppm or less, even more preferably 900 ppm or less. <1> ~ <10> 10. The method for sterilizing plants according to any one of the above.

[0070] <12> The content of component (B) in the plant fungicide treatment solution is preferably 10 ppm or more, more preferably 20 ppm or more, even more preferably 50 ppm or more, and preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 300 ppm or less. <1> ~ <11> 10. The method for sterilizing plants according to any one of the above.

[0071] <13> In the plant fungicide treatment solution, the total content of component (A) and component (B) is preferably 30 ppm or more, more preferably 50 ppm or more, even more preferably 100 ppm or more, still more preferably 200 ppm or more, still more preferably 250 ppm or more, and preferably 2000 ppm or less, more preferably 1200 ppm or less, even more preferably 900 ppm or less. <1> ~ <12> 10. The method for sterilizing plants according to any one of the above.

[0072] <14> Among the components other than water in the plant fungicide treatment solution, the proportions of component (A) and component (B) are preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, still more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less. <1> ~ <13> The method for sterilizing plants described above.

[0073] <15> The plant fungicide treatment solution further contains (C) a solvent (hereinafter referred to as (C) component). <1> ~ <14> 10. The method for sterilizing plants according to any one of the above.

[0074] <16> The component (C) is one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, ethyl lactate, propanol, ethylene glycol, diethylene glycol, propylene glycol, glycerin, ethyl acetate, methanol, ethanol, butyl acetate, methyl lactate, and butyl lactate, preferably one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, ethyl lactate, propanol, ethylene glycol, diethylene glycol, propylene glycol, and glycerin, and more preferably one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, and ethyl lactate. <15> The method for sterilizing plants according to claim 1.

[0075] <17> The content of component (C) in the plant fungicide treatment solution is preferably 10 ppm or more, more preferably 40 ppm or more, even more preferably 80 ppm or more, still more preferably 150 ppm or more, and preferably 1500 ppm or less, more preferably 1000 ppm or less, even more preferably 700 ppm or less, still more preferably 500 ppm or less, and still more preferably 300 ppm or less. <15> or <16> The method for sterilizing plants according to claim 1.

[0076] <18> In the plant fungicide treatment solution, the content of any agricultural chemical raw material selected from the active ingredients of fungicides, insecticides, miticides, and herbicides is preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 100 ppm or less, still more preferably 50 ppm or less, still more preferably 25 ppm or less, still more preferably 10 ppm or less, still more preferably 5 ppm or less, and still more preferably 1 ppm or less. <1> ~ <17> 10. The method for sterilizing plants according to any one of the above.

[0077] <19> Among the components other than water in the plant fungicide treatment solution, the proportions of the components (A), (B), and (C) are preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, still more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and preferably 100% by mass or less. <15> ~ <18> 10. The method for sterilizing plants according to any one of the above.

[0078] <20> The step of applying the plant fungicide treatment solution to a plant includes: (1) spraying the treatment solution onto a plant, preferably onto the leaves, stems, or fruits of a plant, using a hand sprayer, a boom sprayer, or an aerial sprayer; (2) applying the treatment solution directly to plants, preferably to leaves, stems, or fruits; (3) applying the treatment solution to the roots of plants by irrigating the soil with a liquid fertilizer supply device; or (4) A step of applying the treatment solution to the roots as a hydroponic culture solution in hydroponic culture. The process is any one of the following, preferably the process (1). <1> ~ <19> 10. The method for sterilizing plants according to any one of the above.

[0079] <21> The plant fungicide treatment solution is sprayed at a rate of preferably 3 L / 10 a or more, more preferably 5 L / 10 a or more, more preferably 7 L / 10 a or more, even more preferably 10 L / 10 a or more, even more preferably 20 L / 10 a or more, even more preferably 30 L / 10 a or more, even more preferably 40 L / 10 a or more, and preferably 300 L / 10 a or less, more preferably 250 L / 10 a or less, more preferably 200 L / 10 a or less, more preferably 150 L / 10 a or less, even more preferably 120 L / 10 a or less. <1> ~ <20> 10. The method for sterilizing plants according to any one of the above.

[0080] <22> The target plant is one or more kinds of fruit vegetables selected from cucumber, pumpkin, watermelon, melon, tomato, eggplant, bell pepper, strawberry, okra, green beans, broad beans, peas, edamame, and corn; One or more leafy vegetables selected from Chinese cabbage, lettuce, bok choy, cabbage, cauliflower, broccoli, brussels sprouts, onion, leek, garlic, shallot, chive, asparagus, lettuce, lettuce, celery, spinach, garland chrysanthemum, parsley, mitsuba, Japanese parsley, udo, myoga, butterbur, and shiso one or more root vegetables selected from radish, turnip, burdock, carrot, potato, taro, sweet potato, mountain yam, ginger, and lotus root; one or more kinds of flowering plants selected from rice and wheat; One or more species of the genus Oil palm selected from the group consisting of American oil palm and Guinea palm; and One or more species selected from the palm family, <1> ~ <21> 10. The method for sterilizing plants according to any one of the above.

[0081] <23> a filamentous fungus that causes a plant disease selected from among rice brown spot disease, vegetable seedling damping-off disease, cucumber anthracnose, cabbage black soot disease, rice bakanae disease, apple anthracnose, apple rot, apple molinia disease, melon vine wilt disease, radish yellows fungus, onion gray rot disease, pear black spot disease, and sugar beet brown spot fungus; A chemical pesticide-resistant fungus (filamentous fungus) that causes plant diseases selected from apple leaf spot, pepper spot, tomato gray mold, and wheat eyespot; A bacterium that causes a plant disease selected from bok choy soft rot, taro soft rot, and peach bacterial bore; and A mushroom fungus selected from Ganoderma, Ganoderma palustris, and Coriolus versicolor Sterilize one or more types of bacteria selected from <1> ~ <22> 10. The method for sterilizing plants according to any one of the above.

[0082] <24> The plant fungicide treatment solution is applied to a plant under cultivation, preferably by foliar spraying of the plant under cultivation. <1> ~ <23> 10. The method for sterilizing plants according to any one of the above.

[0083] Example [Preparation of plant fungicide composition] The plant fungicide compositions shown in Table 1 were prepared using the ingredients listed below. The plant fungicide compositions in Table 1 were prepared as follows: Components (A), (B), and (C) were weighed to achieve the desired concentrations, and then the components were mixed at 50°C for 1 hour at a rotation speed of 100 rpm, and then cooled to room temperature to obtain plant fungicide compositions. The mass percentages of the blended components in Table 1 are all values ​​based on the active ingredient. For convenience, component (A') and component (B') in Table 1 are listed in the columns for component (A) and component (B), respectively.

[0084] <Composition ingredients> Component (A) A1: Decanol, Kalcol 1098, manufactured by Kao Corporation A2: Octanol, Kalcol 0898, manufactured by Kao Corporation A3: Dodecanol, Kalcol 2098, manufactured by Kao Corporation

[0085] Component (A') (comparison component of component (A)) A'1:1-Hexanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. A'2: Myristyl alcohol Kalcol 4098, manufactured by Kao Corporation

[0086] (B) Component B1: Polyoxyethylene (6) sorbitan monolaurate. The number in parentheses indicates the average number of moles of ethylene oxide added. The same applies below. B2: Polyoxyethylene (6) sorbitan monopalmitate B3: Polyoxyethylene (6) sorbitan monostearate B4: Polyoxyethylene (6) sorbitan monooleate B5: Polyoxyethylene (20) sorbitan monolaurate B6: Polyoxyethylene (20) sorbitan monopalmitate B7: Polyoxyethylene (20) sorbitan monostearate B8: Polyoxyethylene (20) sorbitan monooleate

[0087] Component (B') (comparison component of component (B)) B'1:: Sorbitan monolaurate B'2: Sorbitan monopalmitate B'3: Sorbitan monostearate B'4: Sorbitan monooleate B'5: Polyethylene glycol (12) monolaurate

[0088] (C) Component C1: Propylene glycol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C2: Butanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C3: 2-Ethylhexanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C4: Benzyl alcohol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C5: Ethyl lactate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0089] [Formulation reversibility test] After preparing each plant fungicide composition shown in Table 1, the plant fungicide composition was stored at -16°C for 3 days to solidify. After solidification, the composition was stored at 5°C for 1 hour, and the reversion of the formulations solidified at low temperature to a solution was evaluated. The appearance of the formulation after reversion from solid to a solution was visually inspected and judged according to the following criteria. The results are shown in Table 1. In this evaluation, ◎, ◯, △ to ◯ are preferable, and △ and × are unfavorable. ◎: A transparent liquid. 〇: It is a cloudy but uniform liquid. △ to ◯: The liquid is cloudy and slightly separated into an upper and lower layer when visually inspected, but becomes uniform when lightly shaken. △: The liquid is cloudy, the upper and lower layers are visually separated, and it does not become uniform even when shaken lightly. ×: Remains in a solidified state.

[0090] [Table 1]

[0091] [Preparation of plant fungicide treatment solution] The above-mentioned ingredients were used to prepare the plant fungicide treatment solutions shown in Table 2. The plant fungicide treatment solutions shown in Table 2 were prepared as follows: After weighing out the plant fungicide compositions prepared in Table 1 to a predetermined concentration, a predetermined amount of tap water was added and mixed at room temperature for 10 minutes at a rotation speed of 100 rpm to obtain the plant fungicide treatment solutions shown in Table 2. The contents (ppm) of the blended components in Table 2 are all values ​​based on the active ingredients. For convenience, the (A') component and the (B') component are listed in the (A) component and (B) component columns, respectively.

[0092] [Bactericidal test] The prepared plant fungicide treatment solutions shown in Table 2 were added to potato dextrose medium (PDA medium) during the preparation of the fungicide-containing PDA medium. The following fungi were cultured in separate PDA medium: (1) Apple leaf spot disease (Alternaria mali, a Qo inhibitor-resistant fungus); (2) Bok choy soft rot disease (Erwinia carotovora); and (3) Ganoderma applanatum. A loopful of the fungal colony was then scraped and applied to the fungicide-containing PDA medium prepared above. The fungicide performance was then evaluated by visual inspection of the area of ​​the fungus growing on the fungicide-containing PDA medium relative to the total area of ​​the Petri dish, and assessed according to the following criteria. The results are shown in Table 2. As shown in Table 2, it was confirmed that the plant fungicide treatment solution of the present invention exhibits superior fungicidal performance against (1) filamentous fungi (apple leaf spot disease (Qo inhibitor resistant)), (2) bacteria (Pak choy soft rot), and (3) mushrooms (Ganoderma) compared to the treatment solution of the comparative example. +++: Ungrown (growth area 0%) ++: Slight growth (visually visible - less than 5%) +: 5% to less than 30% growth ±: 30% to less than 60% growth -: 60% or more to 100% growth

[0093] [Plant phytotoxicity test] Soybean (variety: Fukuyutaka) was grown in 9 cm pots for 3 weeks to prepare seedlings at the 2-leaf stage. Each of the prepared plant fungicide treatment solutions shown in Table 2 was sprayed onto the soybean seedlings three times every three days at a spray volume of 100 L / 10 a. One week after spraying, phytotoxicity on the cotyledons and first leaves was visually evaluated according to the following criteria. The results are shown in Table 2. As shown in Table 2, the plant fungicide treatment solution of the present invention did not cause phytotoxicity to soybean seedlings, confirming that it is a highly safe agent for plants. A: As shown in Figure 1(A), no phytotoxicity occurred. B: Slight phytotoxicity occurred as shown in Figure 1(B). C: Severe phytotoxicity occurred as shown in Figure 1(C). D: As shown in Figure 1(D), extremely severe phytotoxicity occurred.

[0094] [Table 2]

[0095] [Bactericidal spectrum test] A plant fungicide treatment solution was prepared by mixing component (A), component (B) or component (B'), and water (balance) in the blending amounts shown in Table 3. For Comparative Example 3-1, Daconil 1000 (tetrachloroisophthalonitrile, manufactured by Sumitomo Chemical Co., Ltd.), a commercially available chemical pesticide fungicide, was mixed with water (balance) in the blending amount shown in Table 3 to prepare a plant fungicide treatment solution. Thirteen types of filamentous fungi, three types of chemical pesticide-resistant filamentous fungi, two types of bacteria, and two types of mushrooms shown in Table 3 were cultured in advance on PDA medium. As in the fungicidal activity test described above, a plant fungicide treatment solution listed in Table 3 was added when preparing the PDA medium to create a fungicide-containing PDA medium. One platinum loopful of each pre-cultured fungal flora was scraped off, applied to the fungicide-containing PDA medium, and cultured at 23°C and 60% relative humidity for 7 days. The evaluation method was the same as in the fungicidal activity test described above. The results are shown in Table 3. As shown in Table 3, the plant fungicide treatment solution of the present invention exhibited superior bactericidal performance against various fungal species (filamentous fungi, chemical pesticide-resistant filamentous fungi, bacteria, and mushrooms) compared to the plant fungicide treatment solution of the comparative example, and was confirmed to have a broad bactericidal spectrum.

[0096] [Table 3]

Claims

1. A plant fungicide treatment solution comprising (A) a straight-chain aliphatic alcohol having from 8 to 12 carbon atoms as a fungicidal component (hereinafter referred to as component (A)), (B) a polyoxyalkylene sorbitan fatty acid ester (hereinafter referred to as component (B)), and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 or more and 0.9 or less, and the content of fungicides other than component (A) is 5 ppm or less; A method for sterilizing plants, comprising the step of applying to the plants: The method for sterilizing plants, wherein the total content of the components (A) and (B) in the plant fungicide treatment solution is 100 ppm or more and 900 ppm or less.

2. 2. The method for sterilizing plants according to claim 1, wherein the plant fungicide treatment solution further contains (C) a solvent (hereinafter referred to as component (C)).

3. A plant fungicide treatment solution comprising (A) a straight-chain aliphatic alcohol having 8 to 12 carbon atoms as a fungicidal component (hereinafter referred to as component (A)), (B) a polyoxyalkylene sorbitan fatty acid ester (hereinafter referred to as component (B)), optionally (C) a solvent, and water, wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 to 0.9, and the content of fungicides other than component (A) is 5 ppm or less, A method for sterilizing plants, comprising the step of applying to the plants: The method for sterilizing plants, wherein the total content of the components (A) and (B) in the plant fungicide treatment solution is 100 ppm or more and 900 ppm or less.

4. 4. The method for sterilizing plants according to claim 1, wherein the component (A) is an aliphatic alcohol having 10 carbon atoms.

5. The method for sterilizing plants according to any one of claims 1 to 4, wherein component (B) is a polyoxyethylene sorbitan fatty acid monoester having a fatty acid carbon number of 8 to 24 and an average number of moles of ethylene oxide added of 5 to 40.

6. The method for sterilizing plants according to any one of claims 2 to 5, wherein the component (C) is one or more selected from propylene glycol, butanol, 2-ethylhexanol, benzyl alcohol, and ethyl lactate.

7. The method for sterilizing plants according to any one of claims 1 to 6, wherein the content of any one selected from the group consisting of insecticides, miticides, and herbicides in the plant fungicide treatment solution is 5 ppm or less.

8. The method for sterilizing plants according to any one of claims 1 to 7, wherein one or more fungi selected from filamentous fungi, chemical pesticide-resistant fungi (filamentous fungi), bacteria, and fungus fungi are sterilized.

9. a filamentous fungus that causes a plant disease selected from among rice brown spot disease, vegetable seedling damping-off disease, cucumber anthracnose, cabbage black soot disease, rice bakanae disease, apple anthracnose, apple rot, apple molinia disease, melon vine wilt disease, radish yellows fungus, onion gray rot disease, pear black spot disease, and sugar beet brown spot fungus; A chemical pesticide-resistant fungus (filamentous fungus) that causes plant diseases selected from apple leaf spot, pepper spot, tomato gray mold, and wheat eyespot; A bacterium that causes a plant disease selected from bok choy soft rot, taro soft rot, and peach bacterial bore; and A mushroom fungus selected from Ganoderma, Ganoderma palustris, and Coriolus versicolor The method for sterilizing plants according to any one of claims 1 to 7, wherein one or more fungi selected from the group consisting of:

10. The method for sterilizing plants according to any one of claims 1 to 7, wherein Ganoderma is sterilized.

11. A plant fungicide composition comprising (A) a straight-chain aliphatic alcohol having from 8 to 12 carbon atoms as a fungicidal component (hereinafter referred to as component (A)), and (B) a polyoxyalkylene sorbitan fatty acid ester (hereinafter referred to as component (B)), wherein the mass ratio (B) / (A) of the content of component (A) to the content of component (B) is 0.05 to 0.9, the total content of component (A) and component (B) is 20 mass% or more, and the content of fungicides other than component (A) is 0.1 mass% or less.

12. a filamentous fungus that causes a plant disease selected from among rice brown spot disease, vegetable seedling damping-off disease, cucumber anthracnose, cabbage black soot disease, rice bakanae disease, apple anthracnose, apple rot, apple molinia disease, melon vine wilt disease, radish yellows fungus, onion gray rot disease, pear black spot disease, and sugar beet brown spot fungus; A chemical pesticide-resistant fungus (filamentous fungus) that causes plant diseases selected from apple leaf spot, pepper spot, tomato gray mold, and wheat eyespot; A bacterium that causes a plant disease selected from bok choy soft rot, taro soft rot, and peach bacterial bore; and A mushroom fungus selected from Ganoderma, Ganoderma palustris, and Coriolus versicolor The plant fungicide composition according to claim 11, which is for killing one or more fungi selected from the group consisting of:

13. A plant fungicide treatment liquid comprising the plant fungicide composition according to claim 11 or 12 and water.

14. The plant fungicide treatment solution according to claim 13, wherein the content of fungicides other than component (A) is 5 ppm or less.

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