Nostoc commune control agent and method for controlling the same

Abstract

To provide a Nostoc commune control agent exhibiting excellent control effect.SOLUTION: The present invention provides a Nostoc commune control agent, characterized by containing mancozeb as an active ingredient, and a method for controlling Nostoc commune.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a Nostoc commune control agent and a control method using mancozeb. [Background technology]

[0002] Nostoc commune is a terrestrial cyanobacterium belonging to the Nostoc genus. It grows on lawns, soil, and concrete, forming colonies with numerous cell filaments wrapped in an agar matrix, spreading in an irregular pattern. It is particularly noticeable as a green, agar-like colony during the rainy season or in constantly damp places, but when dry, it shrinks and survives as a black scab-like substance clinging to the ground. In areas where large numbers of Nostoc commune grow, accidentally stepping on them can be slippery and dangerous, and they can also be considered unsightly and problematic. In recent years, there has been a growing demand for their removal as an unpleasant plant in gardens, parks, playgrounds, cultivated land, public roads, golf courses, and other areas.

[0003] As a composition for controlling Nostoc commune, a composition for controlling Nostoc commune containing grapefruit seed extract and urea as active ingredients has been proposed (see, for example, claim 1 of Patent Document 1). Furthermore, sodium N-methyldithiocarbamate has been used against Nostoc commune as a synergistic anti-algal composition containing a biocide (see, for example, Example 9 of Patent Document 2). Additionally, as a control agent used for the preventive or curative control of algae, a method for preventively or curatively controlling algae and an algae control agent using a combination of an organochlorine bactericide and a dithiocarbamate agent have been disclosed (see, for example, the claims of Patent Document 3). Non-patent literature describes that, for example, mancozeb is effective as an algae control agent in reducing chloroplasts in the Nostoc genus, but does not specify the specific name of the Nostoc genus (see, for example, page 85 of Non-patent literature 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-019878 [Patent Document 2] Japanese Patent Application Publication No. 5-92903 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-224190 [Non-patent literature]

[0005] [Non-Patent Document 1] Journal of Environmental Science &Engineering (Nagpur, India) (2013),55(1), 81-93 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a Nostoc commune control agent that exhibits excellent control effect. [Means for solving the problem]

[0007] As a result of extensive research aimed at solving the above problems, the present inventors have found that the use of mancozeb exhibits an excellent control effect against Nostoc commune, and have completed the present invention.

[0008] That is, a first aspect of the present invention relates to a Nostoc commune control agent containing mancozeb as an active ingredient. As a second aspect, the present invention relates to the Nostoc commune control agent according to the first aspect, wherein the Nostoc commune control agent is a wettable powder or a flowable formulation. As a third aspect, the present invention relates to a method for controlling Nostoc commune, which comprises applying the Nostoc commune control agent according to the first aspect to a place where Nostoc commune occurs or is occurring, so that the amount of mancozeb is 0.5 to 15 g per square meter. [Effects of the Invention]

[0009] The Nostoc commune control agent of the present invention uses mancozeb to provide excellent control effects against Nostoc commune. DETAILED DESCRIPTION OF THE INVENTION

[0010] Mancozeb (CAS registration number: 8018-01-7) is a complex compound of manganese N,N'-ethylenebis(dithiocarbamate) and zinc N,N'-ethylenebis(dithiocarbamate), and is a known fungicide.

[0011] The agent and method for controlling Nostoc commune of the present invention can be used in a treatment method in which the agent is sprayed at a place where Nostoc commune occurs or is occurring, but it is also effective in general application methods commonly used by those skilled in the art. The preferred dosage of mancozeb in the Nostoc commune control agent and control method of the present invention varies depending on various factors, such as the blend ratio of mancozeb, weather conditions, formulation, application method, application location, and application time, but typically, the dosage per application is 0.5 to 15 g per square meter, preferably 0.8 to 12 g, more preferably 1.0 to 10 g, and even more preferably 2.0 to 8 g.

[0012] In the Nostoc commune control agent and control method of the present invention, one or more components selected from the group consisting of known pesticide active ingredients may be mixed and applied at the time of formulation or application, as necessary. The types of components that can be mixed with the Nostoc commune control agent of the present invention are as follows, but are not necessarily limited to these. Examples of the pesticide active ingredient include ambam, maneb, zineb, ziram, propineb, thiuram, and the like. When using the Nostoc commune control agent of the present invention, for example, the agent may be formulated as a wettable powder or the like and diluted with water to a certain ratio to form a chemical solution, which is then sprayed using a dedicated spraying device, but general application methods commonly used by those skilled in the art are also effective. Furthermore, the desired performance of water-dilutable formulations such as the wettable powders is that the formulation quickly blends with water upon dilution, disperses uniformly, and maintains the dispersed state for a long period of time. Mancozeb is a formulation that satisfies these desired performance requirements. Furthermore, one or more metal oxides selected from the group consisting of magnesium oxide, aluminum oxide, titanium oxide and zinc oxide, or surfactants may be contained.

[0013] The surfactant to be used is not particularly limited as long as it is one that is used in ordinary pesticides, and any surfactant such as anionic surfactants, nonionic surfactants, cationic surfactants, and zwitterionic surfactants can be used, and one or more of these can be used. Preferred surfactants are anionic surfactants.

[0014] Examples of anionic surfactants include α-olefin sulfonic acid, α-sulfofatty acid, lignin sulfonic acid, naphthalene sulfonic acid, alkylnaphthalene sulfonic acid, naphthalene sulfonic acid formalin condensate, alkylnaphthalene sulfonic acid formalin condensate, phenol sulfonic acid, alkenyl sulfonic acid, alkyl sulfonic acid, alkylaryl sulfonic acid, polystyrene sulfonic acid, polyacrylic acid, polycarboxylic acid, alkyl sulfate, alkyl ether carboxylic acid, condensate of styrene sulfonic acid and carboxylic acid, polyoxyethylene alkyl ether sulfate ester, polyoxyethylene alkylaryl ether sulfate ester, acyl peptide salt, acyl sarcosine, acyl methylalanine, acyl glycol Examples of the hydroxyl group include glutamic acid, acylmethyltaurine, alkyl or dialkyl sulfosuccinic acid, higher fatty acid, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylaryl ether phosphate, polyoxyethylene arylaryl ether phosphate, and alkali metal salts, alkaline earth metal salts, ammonium salts, and various amine salts thereof. Among these, preferred are alkali metal salts or alkaline earth metal salts of an acid selected from lignin sulfonic acid, alkyl sulfuric acid, naphthalene sulfonic acid-formalin condensate, and alkylnaphthalene sulfonic acid-formalin condensate.

[0015] Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene aryl ethers, polyoxyethylene alkyl esters, polyoxyethylene fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, glycol fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, fatty acid alkanolamides, and alkyl glycosides.

[0016] Examples of cationic surfactants include alkylamine salts, quaternary ammonium salts, alkylpyridinium salts, benzalkonium chloride, and benzethonium chloride.

[0017] Examples of the zwitterionic surfactant include amino acid type, betaine type, and amine oxide type surfactants.

[0018] The amount of surfactant used in the Nostoc commune control agent of the present invention is usually 0.01 to 20% by weight, preferably 0.1 to 10% by weight, in the Nostoc commune control agent.

[0019] The Nostoc commune control agent of the present invention may contain other additives, such as colorants, inorganic and organic carriers, preservatives, pH adjusters, adhesives, and stabilizers.

[0020] The colorant is not particularly limited as long as it is one that is normally used in agricultural chemicals, and examples thereof include dyes, and preferred are copper phthalocyanine, brilliant blue FCF, cyanine green G, and eriogreen G. The amount of the colorant used in the Nostoc commune control agent is usually 0.05 to 0.5% by weight, and preferably 0.1 to 0.3% by weight.

[0021] Examples of inorganic and organic carriers include fine mineral powders commonly used as carriers for agricultural chemicals, such as bentonite, talc, clay, kaolin, diatomaceous earth, amorphous silicon dioxide, calcium carbonate, and magnesium carbonate; organic substances such as sugars, such as glucose, sugar, and lactose, carboxymethylcellulose and / or salts thereof, starch, dextrin, and / or derivatives thereof, and microcrystalline cellulose; water-soluble inorganic salts, such as sodium sulfate, ammonium sulfate, and potassium chloride; or urea. The blending amount of the inorganic and organic carriers in the Nostoc commune control agent is 0.1 to 90% by weight, preferably 0.5 to 70% by weight.

[0022] There are no particular limitations on the preservative, so long as it is one that is normally used in agricultural chemicals, and preferred are sorbic acid, potassium sorbate, parachlorometaxylenol, butyl parahydroxybenzoate, and sodium dehydroacetate. The amount of the preservative used is usually 0.1 to 3% by weight, preferably 0.2 to 2% by weight, in the Nostoc commune control agent.

[0023] The pH adjuster is not particularly limited as long as it is one normally used in agricultural chemicals, and examples thereof include inorganic acids such as hydrochloric acid and phosphoric acid; organic acids such as citric acid, phthalic acid, and succinic acid; organic metal salts such as sodium citrate and potassium hydrogen phthalate; inorganic metal salts such as disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, potassium carbonate, and sodium borate; hydroxides such as sodium hydroxide and potassium hydroxide; and organic amines such as triethanolamine. The pH adjusters used may be used alone or in combination of two or more. The pH adjuster is usually diluted with water to an appropriate concentration of 0.1 to 5 normal, and the diluted solution is added in an amount of 0.01 to 5% by weight. The fixing agent is not particularly limited as long as it improves the rain resistance of the sprayed pesticide, and examples thereof include water-soluble polymers and water-insoluble polymers. Preferred are water-soluble polymers such as modified starch, cellulose derivatives, polyethylene glycol, polypropylene glycol, polyethylene-polypropylene block copolymers, polyvinyl alcohol, and polyvinylpyrrolidone, and more preferably polyvinyl alcohol. The amount of the adhesive used is usually 0.01 to 5% by weight, preferably 0.1 to 1% by weight, in the Nostoc control agent. Hexamethylenetetramine can be used as a stabilizer for mancozeb. The amount of the stabilizer used is usually 0.1 to 10% by weight, preferably 0.5 to 5% by weight, in the Nostoc commune control agent.

[0024] When using the Nostoc commune control agent of the present invention, it can be practically used in any formulation type, such as a soluble concentrate, emulsifiable concentrate, wettable powder, water-soluble powder, water-dispersible granule, water-soluble granule, suspension concentrate, concentrated emulsion, suspoemulsion, microemulsion, dustable powder, granule, tablet, flowable, or emulsifiable gel, but a wettable powder or flowable is preferred. The average particle size of mancozeb contained in the formulation is usually 0.1 to 10 μm, preferably 1 to 3 μm, in order to obtain stable control effect and residual effect. A specific example of a mancozeb wettable powder is the Zimandisen wettable powder, which is widely used to control diseases of many crops and can be used in Japan to treat over 100 types of diseases on 40 crops. Thanks to its excellent formulation technology, it is a pesticide that exhibits stable control and residual efficacy. A specific example of a mancozeb flowable is Zimandithen flowable, a horticultural protective fungicide that is effective in controlling a wide range of diseases and has multiple sites of action, making it less likely for resistance to develop.

[0025] The present invention makes it possible to provide a pesticide that causes little chemical damage and has good rain resistance, particularly a pesticide that is suitable for use in cultivated land, gardens, and golf courses, and a pesticide that can also be sprayed by unmanned aerial vehicle on cultivated land and golf courses. [Example]

[0026] Next, examples of the present invention will be described, but the present invention should not be construed as being limited to these descriptions. There is no.

[0027] [Wettable powder containing mancozeb as the active ingredient] The Nostoc commune control agent used in the examples was a commercially available wettable powder containing mancozeb as an active ingredient (trade name: Jimandaisen wettable powder, active ingredient amount: mancozeb 80.0%, manufactured by Nissan Chemical Industries, Ltd.).

[0028] [Testing star jelly control agents against star jelly] Test Example 1 Biological test methods and results Soil was filled into small polystyrene pots (90 ml capacity), and Nostoc commune was transplanted onto the soil at 300 mg (dry weight) per cup. Three days after transplanting, Dimandisen wettable powder was applied at rates of 3 g, 4.5 g, and 6 g / m. 2 The amount of water sprayed was 0.1 L / m 2 ). 29 days after spraying the chemicals, the algae-killing effect on Nostoc commune was visually observed and evaluated using an index ranging from 0 (none) to 100 (death). The test was carried out in duplicate for each plot, and the average scores are shown in Table 1.

[0029] Table 1 Drug name Amount ( / m 2 ) Evaluation results Dimandisen Wettable Powder (Mancozeb 80%) 3.0g 85 Dimandisen Wettable Powder (Mancozeb 80%) 4.5g 93 Dimandisen Wettable Powder (Mancozeb 80%) 6.0g 95 Table 1 confirms that mancozeb is effective in controlling star jelly.

Claims

1. A star jelly control agent containing mancozeb as an active ingredient.

2. The Nostoc commune control agent according to claim 1, which is a wettable powder or a flowable formulation.

3. A method for controlling Nostoc commune, comprising treating a place where Nostoc commune is occurring or has occurred with the Nostoc commune control agent according to claim 1 in an amount of mancozeb of 0.5 to 15 g per square meter.