JP2005132832A - Blight exterminating agent for laver cultivation, treating liquid for the laver cultivation, and method fop treating cultivated laver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a blight exterminating agent for laver cultivation, capable of exterminating blight of cultivated laver and miscellaneous seaweeds including diatom, and scarcely having adverse effects on the surrounding environment, nor on leaf bodies of the laver. <P>SOLUTION: The blight exterminating agent for the laver cultivation contains one or more kinds selected from the group consisting of (A) a carboxylic acid expressed by formula 1 (R<SB>1</SB>is a 4C or 14-16C straight-chain alkyl, a 3-9C branched-chain alkyl, a 6-8C alkyl which contains a cycloalkane ring, a 3-15C straight-chain alkenyl, a 4-9C branched-chain alkenyl, a 6-9C alkenyl which contains a cycloalkene ring, a 3-5C acyl, a 3-8C alkoxymethylene, a 4-10C hydroxyalkyl or a 1-3C alkyl in which at least one hydrogen atom is substituted with mercapto or an alkylmercapto) and its salt, (B) a thiocarboxylic acid expressed by formula 2 (R<SB>2</SB>is a 1-2C alkyl) and its salt, and (C) an aromatic carboxylic acid and its salt, and further contains a pH adjusting agent. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laver culture disease control agent, a laver culture treatment solution, and a culture laver treatment method. The purpose of the present invention is to eliminate diseases of cultured laver such as red rot fungus, white rot fungus, and fungi, and miscellaneous algae such as diatoms, and it is difficult to adversely affect the surrounding environment and the laver leaf The object is to provide an aquaculture disease control agent, a laver culture treatment solution, and a culture laver treatment method.

In nori cultivation, if algae, bacteria, and other algae such as aonori, aosa, and diatoms adhere to the laver leaves and laver nets, the growth of the laver leaves and the attachment of spores may be hindered, white rot, red rot, Diseases such as rodent fungus develop and cause serious damage to nori culture.
Conventionally, for example, those described in Patent Documents 1 to 3 are known as techniques relating to a processing agent for laver and a processing method for controlling such miscellaneous algae to prevent the onset of diseases.

Patent Document 1 includes one or more of saturated aliphatic monocarboxylic acids having 1 to 4 carbon atoms, saturated or unsaturated dicarboxylic acids having 2 to 4 carbon atoms, glycolic acid, lactic acid, tartaric acid, malic acid, and citric acid. A processing agent for laver containing an organic carboxylic acid as an active ingredient is described.
In Patent Document 2, by immersing a culture tool to which seaweed or seaweed is adhered in a treatment liquid containing 0.3 to 15% by weight of an organic acid and having a pH adjusted to 1.0 to 4.0, It describes a method for cultivating seaweed that eliminates and prevents miscellaneous algae and diseases.
Patent Document 3 describes a nori treatment agent in which inorganic salts and acids are added to seawater to adjust the specific gravity to 1.001 to 1.060 and to adjust the pH to 0.5 to 3.0. ing.

Each of the above-mentioned nori treatment agents and treatment methods is a technique that uses an acid treatment agent in which an organic acid is used as an active ingredient and the pH is adjusted to an acidic range. These acid treatment agents have a certain effect in controlling and preventing miscellaneous algae and diseases. However, the treatment with these acid treatment agents sometimes fails to provide a sufficient effect.
For example, when a large amount of diatoms (Tabularia) clustered on the surface of nori were attached, green spots generally called “pig feces” were generated in the nori product, greatly reducing the commercial value. With the conventional acid treatment agent as described above, a sufficient effect could not be expected for such diatoms. In particular, sufficient effects could not be expected in the case of short-time treatment by a mogul ship or in a cold region where the seawater temperature is low.

Japanese Patent Publication No.56-12601 Japanese Patent Publication No. 60-31451 JP-A-9-201180

  The problem to be solved by the present invention is that it is possible to eliminate the diseases of cultured laver such as red rot fungus, white rot fungus, and fungi, and other algae such as diatoms, and adversely affect the surrounding environment and nori leaves. It is an object of the present invention to provide a laver culture disease control agent, a laver culture treatment solution, and a cultured laver treatment method that are difficult to give.

The invention according to claim 1 includes one or more selected from the group consisting of the following (A), (B) and (C), and a pH adjuster, for laver cultivation It relates to a disease control agent.
(A) Carboxylic acid represented by Formula 1 (Chemical Formula 1) and a salt thereof

（尚、式１中、Ｒ_１は炭素数４、１４〜１６の直鎖のアルキル基、炭素数３〜９の分岐のアルキル基、シクロアルカン環を含む炭素数６〜８のアルキル基、炭素数３〜１５の直鎖のアルケニル基（少なくとも一つの水素原子がカルボキシル基に置換されていても構わない。）、炭素数４〜９の分岐のアルケニル基、シクロアルケン環を含む炭素数６〜９のアルケニル基、炭素数３〜５のアシル基（少なくとも一つの水素原子がカルボキシル基に置換されていても構わない。）、炭素数３〜８のアルコキシメチレン基、炭素数４〜１０のヒドロキシアルキル基、少なくとも一つの水素原子がメルカプト基又はアルキルメルカプト基で置換された炭素数１〜３のアルキル基（少なくとも一つの水素原子がカルボキシル基で置換されていても構わない。）である。）
（Ｂ）式２（化２）で示されるチオカルボン酸及びその塩

(In Formula 1, R ₁ is a linear alkyl group having 4 to 14 carbon atoms, a branched alkyl group having 3 to 9 carbon atoms, an alkyl group having 6 to 8 carbon atoms including a cycloalkane ring, carbon A linear alkenyl group having 3 to 15 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), a branched alkenyl group having 4 to 9 carbon atoms, and a carbon number 6 to 6 containing a cycloalkene ring An alkenyl group having 9 carbon atoms, an acyl group having 3 to 5 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), an alkoxymethylene group having 3 to 8 carbon atoms, and a hydroxy group having 4 to 10 carbon atoms. An alkyl group, an alkyl group having 1 to 3 carbon atoms in which at least one hydrogen atom is substituted with a mercapto group or an alkyl mercapto group (at least one hydrogen atom may be substituted with a carboxyl group); Yes.)
(B) Thiocarboxylic acid represented by Formula 2 (Chemical Formula 2) and a salt thereof

（尚、式２中、Ｒ_２は炭素数１〜２のアルキル基である。）
（Ｃ）ｏ−アニス酸、ｍ−アニス酸、ｐ−アニス酸、バニリン酸、２−フェニルプロピオン酸、３−フェニルプロピオン酸、フェノキシ酢酸、ｐ−クレゾキシ酢酸、４−ヒドロキシ−３−メトキシケイ皮酸、２−フランカルボン酸からなる群から選択される一種又は二種以上の芳香族カルボン酸及びその塩
請求項２に係る発明は、前記ｐＨ調整剤が、有機酸及び無機酸からなる群から選択された一種以上であることを特徴とする請求項１に記載の海苔養殖用病害駆除剤に関する。
請求項３に係る発明は、溶解助剤が含有されていることを特徴とする請求項１又は２に記載の海苔養殖用病害駆除剤に関する。
請求項４に係る発明は、前記溶解助剤がプロピレングリコール、エチレングリコール、ブタンジオール、ポリエチレングリコール、ポリプロピレングリコール、ポリブチレングリコール、エタノール、メタノール、イソプロパノールからなる群から選択された一種以上であることを特徴とする請求項３に記載の海苔養殖用病害駆除剤に関する。
請求項５に係る発明は、請求項１乃至４のいずれかに記載の海苔養殖用病害駆除剤が、水及び／又は海水で希釈されてなることを特徴とする海苔養殖用病害処理液に関する。
請求項６に係る発明は、ポリビニルアルコール及び／又は界面活性剤を含有してなることを特徴とする請求項５に記載の海苔養殖用病害処理液に関する。
請求項７に係る発明は、ｐＨが１〜４に調整されてなることを特徴とする請求項５又は６に記載の海苔養殖用病害処理液に関する。
請求項８に係る発明は、請求項５乃至７のいずれかに記載の海苔養殖用病害処理液と、海苔又は海苔が付着した養殖具とを所要時間接触させることを特徴とする養殖海苔の処理方法に関する。

(In Formula 2, R ₂ is an alkyl group having 1 to ₂ carbon atoms.)
(C) o-anisic acid, m-anisic acid, p-anisic acid, vanillic acid, 2-phenylpropionic acid, 3-phenylpropionic acid, phenoxyacetic acid, p-cresoxyacetic acid, 4-hydroxy-3-methoxycinnamic One or two or more aromatic carboxylic acids selected from the group consisting of acids and 2-furancarboxylic acids and salts thereof. The invention according to claim 2 is characterized in that the pH adjuster is selected from the group consisting of organic acids and inorganic acids. It is the selected 1 or more types, It is related with the disease control agent for laver culture of Claim 1 characterized by the above-mentioned.
The invention according to claim 3 relates to a disease-controlling agent for seaweed culture according to claim 1 or 2, wherein a dissolution aid is contained.
The invention according to claim 4 is that the dissolution aid is at least one selected from the group consisting of propylene glycol, ethylene glycol, butanediol, polyethylene glycol, polypropylene glycol, polybutylene glycol, ethanol, methanol, and isopropanol. The present invention relates to a disease-controlling agent for seaweed culture according to claim 3.
The invention according to claim 5 relates to a disease treatment solution for noriculture, wherein the noriculture disease control agent according to any one of claims 1 to 4 is diluted with water and / or seawater.
The invention according to claim 6 relates to a disease treatment solution for seaweed culture according to claim 5, which comprises polyvinyl alcohol and / or a surfactant.
The invention according to claim 7 relates to a disease treatment solution for seaweed cultivation according to claim 5 or 6, wherein the pH is adjusted to 1 to 4.
The invention according to claim 8 is a treatment of cultured nori, characterized in that the nori culture disease treatment solution according to any one of claims 5 to 7 is brought into contact with the nourishment or nourishing culture tool for a required time. Regarding the method.

In the inventions according to claims 1 and 2, it is possible to eliminate the diseases of cultured laver such as red rot fungus, white rot fungus, and fungi, and miscellaneous algae such as diatom, and adversely affect the surrounding environment and the laver leaf body. It is possible to provide a pest control agent for noriculture that is difficult to give.
In the inventions according to claims 3 and 4, since an acid component that is hardly soluble in water can be dissolved in water, it can be used for diseases of cultured laver such as red rot fungus, white rot fungus, and fungi, and other algae such as diatoms. It is possible to provide a disease-controlling agent for seaweed culture that can exhibit high extermination ability.
In the invention according to claim 5, it is possible to control the diseases of cultured laver such as red rot fungus, white rot fungus, and fungi, and miscellaneous algae such as diatoms, and adversely affect the surrounding environment and the laver leaf body. A disease treatment solution for cultivating nori seaweed can be provided.
In the invention according to claim 6, since an acid component that is hardly soluble in water can be dissolved in water, it is highly effective against diseases of cultured seaweed such as red rot fungus, white rot fungus, and fungi, and other algae such as diatom. It is possible to provide a disease treatment solution for nori culture that can exhibit its ability.
The invention according to claim 7 is to provide a disease treatment solution for nori culture that has a high extermination ability against diseases of cultured seaweed and other algae such as diatoms, and does not adversely affect the surrounding environment and nori leaves. Can do.
In the invention which concerns on Claim 8, the processing method of the culture nori which can prevent the disease of a nori seaweed and can eliminate miscellaneous algae, and can obtain favorable workability | operativity can be provided.

Hereinafter, the laver culture disease control agent, the laver culture treatment solution, and the cultured laver treatment method according to the present invention will be described in detail.
The laver culture disease control agent according to the present invention (hereinafter sometimes simply referred to as a control agent) contains a specific carboxylic acid and a pH adjuster as essential components.

  The specific carboxylic acid contained as an essential component of the pesticide according to the present invention is a carboxylic acid represented by Formula 3 (Chemical Formula 3), a thiocarboxylic acid represented by Formula 4 (Chemical Formula 4), and an aromatic carboxylic acid. is there.

（尚、式３中、Ｒ_１は炭素数４、１４〜１６の直鎖のアルキル基、炭素数３〜９の分岐のアルキル基、シクロアルカン環を含む炭素数６〜８のアルキル基、炭素数３〜１５の直鎖のアルケニル基（少なくとも一つの水素原子がカルボキシル基に置換されていても構わない。）、炭素数４〜９の分岐のアルケニル基、シクロアルケン環を含む炭素数６〜９のアルケニル基、炭素数３〜５のアシル基（少なくとも一つの水素原子がカルボキシル基に置換されていても構わない。）、炭素数３〜８のアルコキシメチレン基、炭素数４〜１０のヒドロキシアルキル基、少なくとも一つの水素原子がメルカプト基又はアルキルメルカプト基で置換された炭素数１〜３のアルキル基（少なくとも一つの水素原子がカルボキシル基で置換されていても構わない。）である。）

(In Formula 3, R ₁ is a linear alkyl group having 4 to 14 carbon atoms, a branched alkyl group having 3 to 9 carbon atoms, an alkyl group having 6 to 8 carbon atoms including a cycloalkane ring, carbon A linear alkenyl group having 3 to 15 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), a branched alkenyl group having 4 to 9 carbon atoms, and a carbon number 6 to 6 containing a cycloalkene ring An alkenyl group having 9 carbon atoms, an acyl group having 3 to 5 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), an alkoxymethylene group having 3 to 8 carbon atoms, and a hydroxy group having 4 to 10 carbon atoms. An alkyl group, an alkyl group having 1 to 3 carbon atoms in which at least one hydrogen atom is substituted with a mercapto group or an alkyl mercapto group (at least one hydrogen atom may be substituted with a carboxyl group); Yes.)

In Chemical Formula 3, as the carboxylic acid in which R ₁ is a linear alkyl group having 4 to 16 carbon atoms, linear saturated aliphatic carboxylic acids such as valeric acid and n-heptadecanoic acid can be exemplified. .

In the chemical formula 3, R ₁ is a branched alkyl group having 3 to 9 carbon atoms, such as isobutyric acid, isovaleric acid, 2-methylbutyric acid, pivalic acid, 2-methylvaleric acid, 3-methylvaleric acid. 4-methylvaleric acid, 2-ethylbutyric acid, 2-methylcaproic acid, 5-methylcaproic acid, 2-methylheptanoic acid, 5-methylhexanoic acid, 2-ethylhexanoic acid, 4-methyloctanoic acid, 3, Examples thereof include branched saturated aliphatic carboxylic acids such as 5,5-trimethylhexanoic acid, isononanoic acid, 3-methylnonanoic acid and 4-ethyloctanoic acid.

In Chemical Formula 3, as the carboxylic acid in which R ₁ is an alkyl group having 6 to 8 carbon atoms containing a cycloalkane ring, a cyclic saturated aliphatic carboxylic acid such as cyclohexanecarboxylic acid, cyclohexaneacetic acid, cyclohexanepropionic acid, etc. is exemplified. Can do.

In the chemical formula 3, R ₁ is a linear alkenyl group having 3 to 15 carbon atoms, such as 2-pentenoic acid, 4-pentenoic acid, 2-hexenoic acid, 3-hexenoic acid, sorbic acid, 2- Heptenoic acid, 2-octenoic acid, 3-octenoic acid, 2-ethylhexenoic acid, 2-nonenoic acid, 3-nonenoic acid, 5-decenoic acid, 6-decenoic acid, 2-decenoic acid, 4-decenoic acid, 9 Examples include linear unsaturated aliphatic carboxylic acids such as -decenoic acid, 10-undecylenic acid, 2-dodecenoic acid, and 2-hexadecenoic acid.
In addition, at least one hydrogen atom in a C3-C15 linear alkenyl group may be substituted with a carboxyl group. An example of such carboxylic acid is aconitic acid.

In Formula 3, as carboxylic acid in which R ₁ is a branched alkenyl group having 4 to 9 carbon atoms, 3-methylcrotonic acid, tiglic acid, angelic acid, 2-methyl-2-pentenoic acid, 2-methyl-4 Examples thereof include branched unsaturated aliphatic carboxylic acids such as pentenoic acid, citronellic acid, 4-ethyl-2-octenoic acid, and gellanic acid.

Examples of the carboxylic acid in which R ₁ is an alkenyl group having 6 to 9 carbon atoms including a cycloalkene ring include cyclic unsaturated aliphatic carboxylic acids such as 2-cyclopentene-1-acetic acid and perillic acid. be able to.

In Formula 3, as the carboxylic acid in which R ₁ is an acyl group having 3 to 5 carbon atoms, linear or branched oxocarboxylic acids such as 2-oxobutyric acid, 2-oxoglutaric acid, and 3-methyl-2-oxovaleric acid An acid can be illustrated.
In addition, at least one hydrogen atom in the C3-C5 acyl group may be substituted with a carboxyl group. An example of such a carboxylic acid is 2-oxoglutaric acid.

Examples of the carboxylic acid in which R ₁ is an alkoxymethylene group having 3 to 8 carbon atoms in Chemical Formula 3 include saturated aliphatic oxycarboxylic acids such as ethoxyacetic acid and hexyloxyacetic acid.

In the chemical formula 3, as the carboxylic acid in which R ₁ is a hydroxyalkyl group having 4 to 10 carbon atoms, linear saturated aliphatic hydroxycarboxylic acid such as 3-hydroxybutyric acid and 3-hydroxyhexanoic acid, 2-hydroxy-3 Examples thereof include branched saturated aliphatic hydroxycarboxylic acids such as methyl valeric acid and 2-hydroxy-4-methyl valeric acid.

In Formula 3, as carboxylic acid in which R ₁ is an alkyl group having 1 to 3 carbon atoms in which at least one hydrogen atom is substituted with a mercapto group or an alkyl mercapto group, 2-mercaptopropionic acid, 3-mercaptopropionic acid, mercapto Examples include acetic acid, 4-methylthiobutyric acid, 3-methylthiopropionic acid, and the like.
In addition, at least 1 hydrogen atom may be substituted by the carboxyl group among the C1-C3 alkyl groups by which the at least 1 hydrogen atom was substituted by the mercapto group or the alkyl mercapto group. An example of such a carboxylic acid is thiomalic acid.

（尚、式４中、Ｒ_２は炭素数１〜２のアルキル基である。）

(In formula 4, R ₂ is an alkyl group having 1 to ₂ carbon atoms.)

Examples of the thiocarboxylic acid in which R ₂ is an alkyl group having 1 to ₂ carbon atoms in Chemical Formula 4 include thiocarboxylic acids such as thioacetic acid and thiopropionic acid.

  As aromatic carboxylic acids, o-anisic acid, m-anisic acid, p-anisic acid, vanillic acid, 2-phenylpropionic acid, 3-phenylpropionic acid, phenoxyacetic acid, p-cresoxyacetic acid, 4-hydroxy-3 Examples include -methoxycinnamic acid and 2-furancarboxylic acid.

The salt of the specific carboxylic acid described above can also be suitably used in the present invention. Examples of the salt of the specific carboxylic acid include sodium salt, potassium salt, ammonium salt and the like, and sodium salt is more preferably used.
Hereinafter, the term “specific carboxylic acid” includes a salt of a specific carboxylic acid.

In the present invention, one kind of the above-mentioned specific carboxylic acids can be contained alone, or two or more kinds can be mixed and contained.
Various additives and solvents as will be described later are added to the above-mentioned specific carboxylic acid as necessary to obtain the treatment agent according to the present invention. The content of the acid component in the treatment agent can be appropriately adjusted according to the type of acid component to be used or a combination thereof, but in a normal case, the total content of the specific carboxylic acid is in the total amount of the treatment agent. 0.1 to 10% by weight, preferably 0.5 to 5% by weight, more preferably 0.5 to 3% by weight.

In addition to the specific carboxylic acid described above, the treatment agent according to the present invention contains a pH adjuster as an essential component. By containing a pH adjuster, the pH of the treatment liquid described later can be adjusted.
Furthermore, some of the specific carboxylic acids described above have low solubility in water (seawater) and may not be sufficiently dissolved in water (seawater). By containing a pH adjuster, the solubility of a specific carboxylic acid of a kind that is difficult to dissolve in water can be increased.
Examples of the pH adjuster include organic acids and inorganic acids.
Organic acids include lactic acid, acetic acid, propionic acid, pyruvic acid, formic acid, butyric acid, citric acid, malic acid, tartaric acid, gluconic acid, glycolic acid, fumaric acid, malonic acid, maleic acid, oxalic acid, succinic acid, acrylic acid Examples thereof include organic acids such as crotonic acid, oxalic acid and glutaric acid, and organic phosphoric acids such as phytic acid.
Examples of inorganic acids include hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid, metaphosphoric acid, polyphosphoric acid, sulfamic acid, and the like.
A pH adjuster can also be contained individually by 1 type, and can also mix and contain 2 or more types.
Of the pH adjusters, acetic acid or lactic acid is preferably used. The reason for this is that lactic acid and acetic acid have the effect of controlling and preventing miscellaneous algae and diseases, respectively, so that the content of a specific carboxylic acid can be reduced by using a specific carboxylic acid together with lactic acid and acetic acid. it can. In addition, processing in a shorter time becomes possible.

Although content of a pH adjuster is not specifically limited, When an organic acid is contained, it is 0 to 90 weight% in the whole amount of a processing agent, Preferably it is 20 to 90 weight%, More preferably, it is 40 to 90 weight%. When it contains an inorganic acid, it is 0 to 20% by weight, preferably 0.5 to 20% by weight, more preferably 5 to 15% by weight.
The reason for this is that even if the organic acid is contained in an amount exceeding 90% by weight or the inorganic acid is contained in an amount exceeding 20% by weight, the balance between the extermination effect and the influence on the laver leaf body and the cost of the preparation This is because it is disadvantageous in terms of surface.

The treatment agent according to the present invention can contain a dissolution aid as necessary. When the content of the pH adjuster is low, a specific carboxylic acid of a kind that is hardly soluble in water may not be sufficiently dissolved in water (seawater). By including a dissolution aid in such a case, it is possible to dissolve a specific carboxylic acid that is difficult to dissolve in water in water (seawater).
Examples of the solubilizer include propylene glycol, ethylene glycol, butanediol, polyethylene glycol, polypropylene glycol, polybutylene glycol, ethanol, methanol, isopropanol and the like.
By mix | blending such a solubilizing agent, content of the above-mentioned organic acid can be reduced, and the bad influence with respect to nori can also be reduced.
When the dissolution aid is contained, the content is not particularly limited, but is 0 to 50% by weight, preferably 0 to 30% by weight in the total amount of the processing agent. The reason for this is that it is cheaper and more effective to contain more pH adjusters such as lactic acid and acetic acid that can increase the solubility of a specific carboxylic acid, rather than containing a solubilizing agent in excess of 50% by weight. This is because a preparation can be obtained.

The treatment agent according to the present invention described above is diluted with water, seawater, or the like as necessary in the actual laver treatment, and the disease treatment liquid for laver culture according to the present invention (hereinafter simply referred to as a treatment liquid). May be used.)
The dilution of the treatment agent may be appropriately adjusted according to the treatment method, the type of acid component, the temperature of seawater, etc. In the normal case, the total concentration of the specific carboxylic acid is 0.001 in the total amount of the treatment liquid. What is necessary is just to dilute with water or seawater etc. so that it may become -0.1weight%, Preferably it is 0.005-0.1weight%, More preferably, it is 0.005-0.03% weight.

  The pH of the treatment liquid according to the present invention can be appropriately adjusted depending on the type of the specific carboxylic acid or pH adjuster contained, or the difference in content or treatment method, but is preferably adjusted to about pH 1 to 4. . In the case of mogul ship processing described later, the pH is set to about 1 to 2.5, preferably about pH 1.8 to 2.5.

  In the above dilution, depending on the type and concentration of the specific carboxylic acid, the solubility of the specific carboxylic acid may decrease and may precipitate. In such a case, a dissolution aid can be added to the treatment liquid. Examples of the dissolution aid include polyvinyl alcohol and surfactants. Examples of the surfactant include polyoxyethylene alkyl ether, alkylamine, alkyldiamine, alkylamine EO adduct, alkyldiamine EO adduct, polyoxyethylene polyoxypropylene glycol and the like.

The treatment liquid according to the present invention can contain inorganic salts. By blending inorganic salts, the content of a specific carboxylic acid can be reduced in particular because the disease caused by the fungus and the effect of treating algae are improved. Injuries to seaweed can be reduced.
Examples of inorganic salts used include alkali metals, alkaline earth metals, ammonium salts, iron salts and the like. Specifically, sodium chloride, magnesium chloride, calcium chloride, potassium chloride, ammonium chloride, sodium sulfate, magnesium sulfate, potassium sulfate, ammonium sulfate, sodium nitrate, potassium nitrate, magnesium nitrate, ammonium nitrate, calcium nitrate, iron chloride, iron sulfate, Examples thereof include iron nitrate.
In addition, when adding inorganic salts, it is preferable to adjust the specific gravity of a process liquid to the range of 1.03-1.20, Furthermore, 1.03-1.13. The reason for this is that when the specific gravity is less than 1.03, the effect of adding inorganic salts is hardly exhibited, and when the specific gravity exceeds 1.20, the specific gravity becomes too high and may damage the seaweed. It is.

The processing liquid which concerns on this invention can add a nutrient component as needed. Nutritional components used include ammonium salts such as ammonium chloride, ammonium nitrate, ammonium phosphate and ammonium sulfate, potassium salts such as potassium nitrate, potassium phosphate and potassium sulfate, sodium salts such as sodium nitrate, sodium phosphate and sodium sulfate, glycine, glutamic acid, Examples of the degradation solution include amino acids such as lysine, vegetable protein degradation products, and animal protein degradation products.
In addition, the above-mentioned nutrient component can also be added in advance to the treatment agent before dilution.

  The method for treating the cultured laver using the treatment liquid according to the present invention described above may be a treatment method similar to the conventional method in which a culture tool such as a laver or a laver net attached with the laver is brought into contact with the treatment liquid for a required time. Absent. For example, in a method referred to as a soaking process, the processing liquid is accommodated in a vessel such as a processing liquid tank in a ship, and a seaweed pulled out from the sea or a culture tool attached with nori is immersed in the processing liquid. It is preferable to adjust the concentration of the treatment liquid in the case of performing the treatment for a relatively long time such as the immersion treatment so as to be a relatively low concentration. The dipping time of the seaweed in the treatment liquid is the growth state of the seaweed, diatoms, other miscellaneous algae and disease conditions, the type, concentration, pH of the treatment liquid, and the pH of the treatment liquid. What is necessary is just to adjust suitably according to temperature.

  Further, like a mogul ship, the ship can be submerged under a nori culture net and processed in a relatively short time while passing the net through the processing liquid. In the case of this mogul ship, it is preferable to set the concentration of the treatment liquid higher than in the case of the immersion treatment described above. Specifically, the concentration of the specific carboxylic acid is adjusted to 0.001 to 0.05% by weight, preferably 0.01 to 0.03% by weight in the treatment liquid. The processing time by a mogul ship or the like is about 30 seconds to 2 minutes, and is usually about 40 seconds to 1 minute. Furthermore, in some areas, a method called threading processing using a small ship is performed. This is a processing method in which the processing liquid is accommodated in a container such as a processing liquid tank in the ship, and the ship is submerged under the nori culture net so that the nori culture net is immersed in the processing liquid. In the case of this through process, the processing time is 5 to 30 seconds, and usually 10 to 20 seconds.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to these Examples at all.

<Preparation of sample>
80% lactic acid is added to artificial seawater at 0.1% by weight or 0.3% by weight, then 0 to 500 ppm of the acid components shown in Tables 1 to 8 are added, dissolved and mixed, and further treated with hydrochloric acid as necessary. By adjusting the pH of each to the value described in each table, the disease treatment solution for nori culture in each test section was prepared.
Further, 0.3% by weight of 90% acetic acid is added to artificial seawater, then 0 to 500 ppm of acid components shown in Tables 9 and 10 are added and dissolved and mixed, and the pH of the treatment solution is adjusted with hydrochloric acid as necessary. By adjusting to the values described in the table, a disease treatment solution for laver culture in each test section was prepared.
Furthermore, the acid components shown in Tables 11 to 14 are added to artificial seawater, dissolved and mixed, and the disease treatment liquid for laver cultivation in the test zone in which the pH is adjusted to the value described in each table with hydrochloric acid and the test zone in which the pH is not adjusted Prepared.

<Test example>
Each treatment solution prepared above is treated with a vinyl chloride plate with diatoms attached for the time indicated in the table, washed with artificial seawater used for sample preparation (about 20 seconds), then returned to new artificial seawater, The extermination effect of the diatom adhering to the vinyl chloride plate was judged. Determination of the diatom extermination effect indicated the diatom staining rate by erythrosine staining in the range of “−” to “100%”, where “−” had no effect at all, and the higher the%, the more effective.
In addition, the influence on the laver leaf body was determined by the staining rate of the laver leaf body by erythrosin staining and the degree of damage of the buds observed by a microscopic examination. The determination of the staining rate of the laver leaf body was shown in the range of “−” to “+++”, and “−” was not damaged at all, and the more the number of “+”, the more severe the damage.
The determination of the degree of damage to the buds was “◯: No damage”, “Δ: Slightly damaged”, and “X: Damaged”. The results are listed in Tables 1-14.

  As shown in Tables 1 to 14, it can be seen that the disease treatment liquid for laver culture according to the present invention can exterminate diatoms without adversely affecting the laver.

As shown in Tables 1 to 14, among the carboxylic acids represented by Formula 3, R ₁ is a carboxylic acid having a branched alkyl group having 5 to 9 carbon atoms, and R ₁ has 6 to 6 carbon atoms including a cycloalkane ring. 8 carboxylic acid is an alkyl group, a carboxylic acid R ₁ is an alkenyl group having a straight chain of 4 to 10 carbon atoms, a carboxylic acid R ₁ is a branched alkenyl group of 5-9 carbon atoms, R ₁ is, An excellent diatom control effect is obtained by using a carboxylic acid in which at least one hydrogen atom is substituted with a mercapto group or an alkyl mercapto group and having 1 to 3 carbon atoms, of which at least one hydrogen atom is substituted with a carboxyl group. You can see that
Moreover, as Tables 1-14 show, aromatic carboxylic acids, such as phenoxyacetic acid, furan carboxylic acid, 4-hydroxy-3-methoxycinnamic acid, and phenylpropionic acid, show that the diatom control effect was excellent.

Hereinafter, the compounding example of the disease treatment agent for cultured seaweed which concerns on this invention is shown.
[Formulation Example 1]
Using lactic acid (80%) 50%, acetic acid (90%) 20%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 4%, isononanoic acid 0.5%, propylene glycol 13.5%, First, isononanoic acid was dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol, and phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treating agent.

[Formulation Example 2]
Lactic acid (80%) 50%, acetic acid (90%) 20%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 4%, 4-ethyloctanoic acid 0.5%, propylene glycol 13.5% First, 4-ethyloctanoic acid was dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol, and phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treatment agent.

[Composition Example 3]
Using lactic acid (80%) 50%, acetic acid (90%) 20%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 4%, citronellic acid 0.5%, propylene glycol 13.5%, First, citronellic acid was dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol, and phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treatment agent.

[Formulation Example 4]
Lactic acid (80%) 50%, acetic acid (90%) 20%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 4%, phenoxyacetic acid 0.5%, propylene glycol 13.5%, First, phenoxyacetic acid was dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol, and phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treatment agent.

[Formulation Example 5]
Lactic acid (80%) 50%, acetic acid (90%) 20%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 4%, 2-octenoic acid 0.5%, propylene glycol 13.5% First, 2-octenoic acid was dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol, and phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treating agent.

[Composition Example 6]
Lactic acid (80%) 65%, acetic acid (90%) 10%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 3%, isononanoic acid 1.0%, propylene glycol 8%, partially saponified polyvinyl Using 1% alcohol (10% solution), first dissolve isononanoic acid in a mixture of lactic acid, acetic acid and propylene glycol, and add phosphoric acid, hydrochloric acid and partially saponified polyvinyl alcohol solution to mix uniformly. Thus, a treatment agent was prepared.

[Composition Example 7]
Lactic acid (80%) 40%, acetic acid (90%) 10%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 3%, isononanoic acid 1.5%, propylene glycol 33.5%, partially saponified First, isononanoic acid is dissolved in a mixed solution of lactic acid, acetic acid and propylene glycol using 3% type polyvinyl alcohol (10% solution), and then phosphoric acid, hydrochloric acid and a partially saponified polyvinyl alcohol solution are added to the solution. The treatment agent was prepared.

[Formulation Example 8]
Using lactic acid (80%) 50%, acetic acid (90%) 3%, phosphoric acid (75%) 12%, hydrochloric acid (35%) 3%, 2-furancarboxylic acid 1%, water 31%, 2-furancarboxylic acid was dissolved in water, and lactic acid, acetic acid, phosphoric acid and hydrochloric acid were added thereto and mixed uniformly to prepare a treatment agent.

Claims (8)

A disease control agent for laver culture, comprising one or more selected from the group consisting of the following (A), (B) and (C), and a pH adjuster.
(A) Carboxylic acid represented by Formula 1 (Chemical Formula 1) and a salt thereof

(In Formula 1, R ₁ is a linear alkyl group having 4 to 14 carbon atoms, a branched alkyl group having 3 to 9 carbon atoms, an alkyl group having 6 to 8 carbon atoms including a cycloalkane ring, carbon A linear alkenyl group having 3 to 15 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), a branched alkenyl group having 4 to 9 carbon atoms, and a carbon number 6 to 6 containing a cycloalkene ring An alkenyl group having 9 carbon atoms, an acyl group having 3 to 5 carbon atoms (at least one hydrogen atom may be substituted with a carboxyl group), an alkoxymethylene group having 3 to 8 carbon atoms, and a hydroxy group having 4 to 10 carbon atoms. An alkyl group, an alkyl group having 1 to 3 carbon atoms in which at least one hydrogen atom is substituted with a mercapto group or an alkyl mercapto group (at least one hydrogen atom may be substituted with a carboxyl group); Yes.)
(B) Thiocarboxylic acid represented by Formula 2 (Chemical Formula 2) and a salt thereof

(In Formula 2, R ₂ is an alkyl group having 1 to ₂ carbon atoms.)
(C) o-anisic acid, m-anisic acid, p-anisic acid, vanillic acid, 2-phenylpropionic acid, 3-phenylpropionic acid, phenoxyacetic acid, p-cresoxyacetic acid, 4-hydroxy-3-methoxycinnamic Acid, one or two or more aromatic carboxylic acids selected from the group consisting of 2-furancarboxylic acid and salts thereof   The disease control agent for laver culture according to claim 1, wherein the pH adjuster is at least one selected from the group consisting of organic acids and inorganic acids.   The disinfectant for laver cultivation according to claim 1 or 2, wherein a dissolution aid is contained.   The said solubilizing agent is at least one selected from the group consisting of propylene glycol, ethylene glycol, butanediol, polyethylene glycol, polypropylene glycol, polybutylene glycol, ethanol, methanol, and isopropanol. Disease control agent for nori culture.   A disease treatment solution for seaweed culture, wherein the disease control agent for seaweed culture according to any one of claims 1 to 4 is diluted with water and / or seawater.   The disease treatment liquid for laver cultivation according to claim 5, comprising polyvinyl alcohol and / or a surfactant.   The disease treatment solution for laver cultivation according to claim 5 or 6, wherein the pH is adjusted to 1 to 4. A diseased treatment solution for laver cultivation according to any one of claims 5 to 7, and a culture tool to which the laver or the laver is adhered are brought into contact with each other for a required time.