JP2019043868A - Method for enhancing weeding activity of acetic acid, and acetic acid-containing herbicide - Google Patents
Method for enhancing weeding activity of acetic acid, and acetic acid-containing herbicide Download PDFInfo
- Publication number
- JP2019043868A JP2019043868A JP2017167097A JP2017167097A JP2019043868A JP 2019043868 A JP2019043868 A JP 2019043868A JP 2017167097 A JP2017167097 A JP 2017167097A JP 2017167097 A JP2017167097 A JP 2017167097A JP 2019043868 A JP2019043868 A JP 2019043868A
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- Prior art keywords
- acetic acid
- acid
- present
- herbicide
- herbicidal activity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims abstract description 210
- 230000002363 herbicidal effect Effects 0.000 title claims abstract description 87
- 239000004009 herbicide Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 12
- 230000000694 effects Effects 0.000 title abstract description 24
- 238000009333 weeding Methods 0.000 title abstract description 10
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- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
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- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
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Abstract
Description
本発明は、酢酸の除草活性を増強する方法および、酢酸と特定成分とを含有する除草剤に関する。詳しくは、特定の成分（ａ）、（ｂ）、（ｃ）から選択される何れか１種以上を酢酸と併用することを特徴とする、酢酸の除草活性を増強する方法に関する。また、酢酸と特定の成分（ａ’）、（ｂ）、（ｃ）から選択される何れか１種以上を含有することを特徴とする除草剤に関する。 The present invention relates to a method for enhancing the herbicidal activity of acetic acid, and a herbicide containing acetic acid and a specific component. More specifically, the present invention relates to a method for enhancing the herbicidal activity of acetic acid, which comprises using any one or more selected from specific components (a), (b) and (c) in combination with acetic acid. The present invention also relates to a herbicide characterized in that it contains acetic acid and one or more selected from specific components (a '), (b) and (c).
雑草は、その生育を制御しないと繁茂し美観を損ねるばかりでなく、土壌中の養分を吸収してしまい、雑草以外の植物（例えば、農作物や園芸植物等）が生育障害や品質低下を引き起こし大きな損害を与える。また、雑草の繁茂は、農業害虫や不快害虫等の住処を提供することになり、生活環境が悪化するなどの悪影響が懸念される。これら雑草を制御する方法として、様々な除草剤が使用されてきた。グリホサート等のアミノ酸系やベンタゾン等のスルホニルウレア系に代表される、化学合成系除草成分を含有する製剤が汎用されているが、使用者の安全志向の向上により、天然成分由来の除草剤のニーズも高まってきている。天然由来成分の除草剤として、ペラルゴン酸に代表される脂肪酸及びその塩（特許文献１）、ｄ−リモネン（特許文献２）、酢酸（特許文献３）などが利用されている。しかし、これら天然成分由来の除草活性成分は、散布した植物の接触部位にのみ枯死反応を起こすため、付着が不十分な部位から再生を生じやすく、根部まで枯死させることが難しいという問題がある。また、除草効果を高めるために有効成分量を高くすると、特有の臭いや皮膚刺激といった問題が発生する。
このような状況から、雑草に対して優れた除草効果を有する、天然成分由来の薬剤の開発が望まれていた。
If weeds do not control their growth, they not only overwhelm the aesthetics but also absorb nutrients in the soil, and plants other than weeds (such as agricultural products and horticultural plants etc.) cause growth disorders and loss of quality. Do damage. In addition, the growing of weeds will provide housing for agricultural pests and unpleasant pests, which may cause adverse effects such as deterioration of the living environment. Various herbicides have been used as a method to control these weeds. Preparations containing chemically synthesized herbicidal components, represented by amino acids such as glyphosate and sulfonylureas such as bentazone, are widely used, but the need for herbicides derived from natural components is also improved by improving the safety orientation of users. It is rising. As herbicides of natural origin components, fatty acids represented by pelargonic acid and salts thereof (Patent Document 1), d-Limonene (Patent Document 2), acetic acid (Patent Document 3), and the like are used. However, since these herbicidal active ingredients derived from natural ingredients cause a death response only at the contact site of the sprayed plant, there is a problem that regeneration from the site with insufficient adhesion tends to occur and it is difficult to wither to the root. In addition, when the amount of the active ingredient is increased to enhance the herbicidal effect, problems such as peculiar odor and skin irritation occur.
From such a situation, development of a drug derived from a natural ingredient having excellent herbicidal effect on weeds has been desired.
本発明は、酢酸を有効成分とする除草剤において、雑草に対する除草活性を増強する方法や、より高い除草効果を得るために他成分と組み合わせた除草剤を提供することを目的としている。 An object of the present invention is to provide a method of enhancing the herbicidal activity against weeds, and a herbicide which is combined with other components to obtain higher herbicidal effect, as a herbicide containing acetic acid as an active ingredient.
本発明の成分（ａ）または（ａ’）、（ｂ）、（ｃ）は、雑草に対して除草活性を有することは全く知られておらず、しかも、低薬量の酢酸の除草活性は低いものであり、この除草効果を増強する手段も知られていなかった。
本発明者は、上記課題を解決するために鋭意研究を重ねた結果、特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される何れか１種以上の成分を酢酸と併用することにより、相乗効果により優れた除草効果を発揮し、低薬量の酢酸の除草活性を増強できることを新たに見出し、上記課題を解決し、本発明を完成するに至ったものである。
The components (a) or (a '), (b) and (c) of the present invention are not known at all to have herbicidal activity against weeds, and the herbicidal activity of low doses of acetic acid is It was low and no means for enhancing this herbicidal effect were known.
MEANS TO SOLVE THE PROBLEM As a result of repeating earnest research in order to solve the said subject, this inventor selects any one or more types of components selected from specific component (a) or (a '), (b), (c). By using together with acetic acid, it has been newly found that the herbicidal activity can be enhanced by synergy and the herbicidal activity of low dose acetic acid can be enhanced, and the above problems are solved, and the present invention has been completed. is there.
本発明は、具体的には次の事項を要旨とする。
１．下記（ａ）、（ｂ）、（ｃ）から選択される何れか１種以上の成分を酢酸と併用することを特徴とする、酢酸の除草活性を増強する方法。
（ａ）炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩
（ｂ）多価アルコール
（ｃ）塩化ナトリウム
２．酢酸と、下記（ａ’）、（ｂ）、（ｃ）から選択される何れか１種以上の成分を含有することを特徴とする除草剤。
（ａ’）２５℃におけるｐＫａ値が３．０以上、５．０以下である炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩
（ｂ）多価アルコール
（ｃ）塩化ナトリウム
Specifically, the present invention is summarized as follows.
1. A method for enhancing the herbicidal activity of acetic acid, which comprises using any one or more components selected from the following (a), (b) and (c) in combination with acetic acid.
(A) Mono- or dicarboxylic acid having 2 or more and 10 or less carbon atoms or metal salt thereof (b) Polyhydric alcohol (c) Sodium chloride A herbicide comprising acetic acid and any one or more components selected from the following (a '), (b) and (c):
(A ') mono-, dicarboxylic acid or metal salt thereof having a carbon number of 2 or more and 10 or less having a pKa value at 25 ° C. of 3.0 or more and 5.0 or less (b) polyhydric alcohol (c) sodium chloride
本発明は、食酢として使用される酢酸と、本発明の成分（ａ）または（ａ’）、（ｂ）、（ｃ）とを組み合わせることにより、酢酸の除草活性が増強され、酢酸単独では十分な除草効果を得ることが出来ない低薬量においても、優れた除草効果を得ることができる。
また、本発明の除草剤は、低薬量の酢酸においても優れた除草効果が得られるため、周囲の育成植物に対する薬害の心配がなく、環境および人やペット等の動物に対する影響もなく安全性が高いという特徴を有する。
本発明の除草剤は、そのまま若しくは水に希釈して、家庭菜園、花壇、家屋周辺、空き地、芝生地、庭園、駐車場、墓地、樹木地、潅木地、ゴルフ場など、人の住環境近辺に発生した雑草に対して直接散布することによって、効率的に除草することができ、これにより雑草の繁茂を抑制し美観を維持することができる。
In the present invention, the herbicidal activity of acetic acid is enhanced by combining acetic acid used as a vinegar with the components (a) or (a '), (b), (c) of the present invention, and acetic acid alone is sufficient. An excellent herbicidal effect can be obtained even at a low dose which can not obtain a good herbicidal effect.
In addition, the herbicide of the present invention is excellent in herbicidal effect even at a low dose of acetic acid, so there is no concern about adverse effects on surrounding breeding plants, and there is no effect on the environment and animals such as humans and pets. Is high.
The herbicide of the present invention, as it is or diluted with water, is in the vicinity of the living environment of a person such as a kitchen garden, flower bed, house, vacant land, lawn, garden, parking lot, cemetery, woodland, shrub land, golf course, etc. By direct application to the weeds generated, it is possible to be weed efficiently, thereby suppressing the growth of weeds and maintaining the aesthetic appearance.
以下、本発明について詳細に説明する。
本発明は、有効成分として酢酸と、特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を使用する発明である。
酢酸は、分子式Ｃ２Ｈ４Ｏ２と表されるカルボン酸であり、食酢に含まれる弱酸で、強い酸味と刺激臭を持つ化合物として公知である。本発明に使用できる酢酸は、純粋な酢酸の水による希釈物の他、醸造酢である食酢、通常の食酢より酢酸濃度の高い高濃度醸造酢、さらに粉末醸造酢の水による希釈物などがある。これらは市販されており、例えば、穀物酢や特濃酢、高濃度醸造酢、粉末食酢（酢酸とデキストリン等の混合物）などを利用することができる。また、ワインビネガーやアップルビネガーといった果実酢も利用可能である。
Hereinafter, the present invention will be described in detail.
The present invention is an invention using acetic acid as an active ingredient and one or more components selected from specific components (a) or (a '), (b) and (c).
Acetic acid is a carboxylic acid represented by molecular formula C 2 H 4 O 2 and is a weak acid contained in vinegar and is known as a compound having a strong acidity and a pungent odor. The acetic acid that can be used in the present invention includes pure acetic acid diluted with water, vinegar being a brewed vinegar, highly concentrated vinegar having an acetic acid concentration higher than that of ordinary vinegar, and further diluted water with powdered vinegar. . These are commercially available, and for example, grain vinegar, special concentration vinegar, high concentration vinegar, powder vinegar (mixture of acetic acid and dextrin, etc.) and the like can be used. Also available are fruit vinegars such as wine vinegar and apple vinegar.
＜成分（ａ）または（ａ’）について＞
本発明の成分（ａ）は、炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩である。
本発明の成分（ａ）に含まれる化合物の具体例としては、例えば酢酸、プロピオン酸、酪酸、吉草酸、カプロン酸、エナント酸、カプリル酸、ペラルゴン酸、カプリン酸等の飽和脂肪酸、シュウ酸、マロン酸、コハク酸、グルタル酸、アジピン酸、フマル酸、マレイン酸等のジカルボン酸、乳酸、リンゴ酸、酒石酸等のヒドロキシカルボン酸、安息香酸、フタル酸、イソフタル酸、テレフタル酸、サリチル酸等の芳香族カルボン酸等が挙げられる。
また、これらモノ、ジカルボン酸の金属塩としては、例えばリチウム、ナトリウム、カリウム等のアルカリ金属塩、マグネシウム、カルシウム等のアルカリ土類金属塩等が挙げられる。
本発明の成分（ａ）の中でも、本発明の成分（ａ’）として定義される、２５℃におけるｐＫａ値が３．０以上、５．０以下である炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩が好ましい。
本発明において、ｐＫａとは水中の酸解離定数のことであり、水素イオンが放出される解離反応における平衡定数Ｋａの負の常用対数ｐＫａ（ｐｋａ＝−ｌｏｇ10Ｋａ）によって表される。ｐＫａが小さいほど強い酸であることを示す。ｐｋａは、電位滴定法、紫外可視分光法、核磁気共鳴分光法などを用いて通常２５℃、水中で測定されるが、本発明におけるｐＫａ値は、”Organic Chemistry Info”（インターネット http://www.chem.wisc.edu/areas/organic/index-chem.htm）に記載されている値を使用した。
本発明の成分（ａ’）に含まれる化合物の具体例としては、例えば酢酸（ｐＫａ＝４．７６）、プロピオン酸（ｐＫａ＝４．８８）、酪酸（ｐＫａ＝４．８２）、吉草酸（ｐＫａ＝４．８２）、コハク酸（ｐＫａ＝４．１９）、グルタル酸（ｐＫａ＝４．３４）、アジピン酸（ｐＫａ＝４．４２）、フマル酸（ｐＫａ＝３．０２）、乳酸（ｐＫａ＝３．８６）、リンゴ酸（ｐＫａ＝３．４０）、酒石酸（ｐＫａ＝３．００）等が挙げられる。
本発明の成分（ａ’）の中でも、２５℃におけるｐＫａ値が３．５以上、５．０以下である炭素数２以上５以下のモノ、ジカルボン酸またはその金属塩が好ましく、乳酸、コハク酸、酢酸ナトリウムが特に好ましい。
本発明の成分（ａ）または（ａ’）は、１種を単独で、または２種以上を組み合わせて使用することができる。なお、本発明は、酢酸と、酢酸（酢酸の金属塩は除く）のみを併用する発明は含まない。
<Regarding Component (a) or (a ′)>
Component (a) of the present invention is a mono-, dicarboxylic acid or a metal salt thereof having 2 to 10 carbon atoms.
Specific examples of the compound contained in the component (a) of the present invention include, for example, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthate, saturated fatty acids such as caprylic acid, pelargonic acid and capric acid, oxalic acid, Malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, dicarboxylic acid such as maleic acid etc., lactic acid, hydroxycarboxylic acid such as malic acid, tartaric acid, benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, salicylic acid etc. Group carboxylic acid and the like.
Examples of metal salts of these mono and dicarboxylic acids include alkali metal salts such as lithium, sodium and potassium, and alkaline earth metal salts such as magnesium and calcium.
Among the component (a) of the present invention, a mono- or di-carbon having a carbon number of 2 to 10 and a pKa value at 25 ° C. of 3.0 to 5.0 as defined as the component (a ′) of the present invention An acid or its metal salt is preferred.
In the present invention, pKa is an acid dissociation constant in water and is represented by the negative common logarithm pKa (pka = −log 10 Ka) of the equilibrium constant Ka in the dissociation reaction in which hydrogen ions are released. The smaller the pKa, the stronger the acid. Although pka is usually measured in water at 25 ° C. using potentiometric titration method, ultraviolet-visible spectroscopy, nuclear magnetic resonance spectroscopy, etc., the pKa value in the present invention is “Organic Chemistry Info” (Internet http: // The values described in www.chem.wisc.edu/areas/organic/index-chem.htm) were used.
Specific examples of the compound contained in the component (a ′) of the present invention include, for example, acetic acid (pKa = 4.76), propionic acid (pKa = 4.88), butyric acid (pKa = 4.82) and valeric acid pKa = 4.82), succinic acid (pKa = 4.19), glutaric acid (pKa = 4.34), adipic acid (pKa = 4.42), fumaric acid (pKa = 3.02), lactic acid (pKa Malic acid (pKa = 3.40), tartaric acid (pKa = 3.00) and the like.
Among the components (a ′) of the present invention, mono-, dicarboxylic acids or metal salts thereof having 2 to 5 carbon atoms having a pKa value at 25 ° C. of 3.5 or more and 5.0 or less are preferred. , Sodium acetate is particularly preferred.
The components (a) or (a ′) of the present invention can be used singly or in combination of two or more. In addition, this invention does not include the invention which used together acetic acid and acetic acid (except the metal salt of acetic acid).
＜成分（ｂ）について＞
本発明の成分（ｂ）は、多価アルコールである。
多価アルコールとは、脂肪族炭化水素の水素原子の２個以上が水酸基（ヒドロキシル基）で置換されたアルコールである。本発明において、多価アルコールは糖分子のカルボニル基が還元された鎖状アルコールを意味する糖アルコールも含む。
本発明の成分（ｂ）に含まれる化合物の具体例としては、例えばソルビトール、キシリトール、エリスリトール、ラクチトール、イソマルト等の糖アルコール、プロピレングリコール、ヘキシレングリコール、ポリエチレングリコール、グリセリン等の多価アルコールが挙げられる。
本発明の成分（ｂ）の中でも、グリセリン、ヘキシレングリコール、イソマルトが好ましい。
本発明の成分（ｂ）は、１種を単独で、または２種以上を組み合わせて使用することができる。
<Regarding Component (b)>
Component (b) of the present invention is a polyhydric alcohol.
The polyhydric alcohol is an alcohol in which two or more hydrogen atoms of an aliphatic hydrocarbon are substituted by a hydroxyl group (hydroxyl group). In the present invention, polyhydric alcohols also include sugar alcohols which mean chain alcohols in which the carbonyl group of sugar molecules is reduced.
Specific examples of the compound contained in the component (b) of the present invention include, for example, sugar alcohols such as sorbitol, xylitol, erythritol, lactitol and isomalt, and polyhydric alcohols such as propylene glycol, hexylene glycol, polyethylene glycol and glycerin. Be
Among the component (b) of the present invention, glycerin, hexylene glycol and isomalt are preferable.
The components (b) of the present invention can be used alone or in combination of two or more.
＜成分（ｃ）について＞
本発明の成分（ｃ）は、塩化ナトリウムである。
<Regarding Component (c)>
Component (c) of the present invention is sodium chloride.
本発明は、酢酸と特定の成分（ａ）、（ｂ）、（ｃ）から選択される１種以上の成分を、重量比で１：１００〜１００：１の範囲で併用することにより、酢酸の除草活性を増強し得ることができる。上記重量比の中でも、１：１０〜１０：１の範囲が好ましく、１：５〜５：１の範囲がより好ましい。
また、本発明の除草剤は、有効成分である酢酸を除草剤全体の０．１重量％以上１０重量％以下含有することが好ましく、中でも、０．２重量％以上８重量％以下含有することがより好ましく、０．３重量％以上５重量％以下含有することがさらに好ましい。また、本発明の特定の成分（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を、除草剤全体の０．１重量％以上１０重量％以下含有することが好ましく、中でも、０．２重量％以上８重量％以下含有することがより好ましく、０．３重量％以上７重量％以下含有することがさらに好ましい。
酢酸と特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を組み合わせることにより、それぞれ単独の除草活性に比べて、特異的な向上、すなわち、単に２つの成分を単独で処理したときに予想される効果を遥かに超える相乗効果が得られることを後述する実験により確認している。本発明の組み合わせが、相乗的な除草活性を示す作用機構についての詳細は不明であるが、２つの成分を組み合わせることにより、作用点レベルにおける相互共力作用が発現した結果、このような顕著な効果が得られるものと推測される。したがって、この相乗効果は、酢酸と特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を組み合わせることにより初めて得られる効果であり、これは本発明者が実験を行い初めて当該効果を確認した格別顕著な効果である。
The present invention uses acetic acid and one or more components selected from specific components (a), (b) and (c) in combination by weight ratio in the range of 1: 100 to 100: 1. Can enhance its herbicidal activity. Among the above weight ratios, the range of 1:10 to 10: 1 is preferable, and the range of 1: 5 to 5: 1 is more preferable.
Moreover, it is preferable that the herbicide of this invention contains the acetic acid which is an active ingredient 0.1 to 10 weight% of the whole herbicide, and in particular, it contains 0.2 to 8 weight%. Is more preferable, and the content is more preferably 0.3% by weight or more and 5% by weight or less. In addition, it is preferable to contain one or more components selected from the specific components (a '), (b) and (c) of the present invention in an amount of 0.1 wt% or more and 10 wt% or less of the whole herbicide. Among them, the content is more preferably 0.2% by weight or more and 8% by weight or less, and still more preferably 0.3% by weight or more and 7% by weight or less.
By combining acetic acid and one or more components selected from specific components (a) or (a '), (b), (c), specific improvement, ie, as compared to individual herbicidal activity, ie, The experiments described later confirm that synergy effects far exceeding the expected effects can be obtained when simply treating the two components alone. Although the details of the mechanism of action by which the combination of the present invention shows synergistic herbicidal activity are unknown, the combination of the two components resulted in the development of a synergistic action at the level of the action point, such a remarkable effect It is presumed that the effect can be obtained. Therefore, this synergistic effect is an effect obtained by combining acetic acid and one or more components selected from specific components (a) or (a '), (b) and (c), It is an extremely remarkable effect that the present inventor has conducted experiments to confirm the effect for the first time.
本発明の除草対象である雑草は、家庭菜園や花壇等の周辺に生育し、育成作物に害を与える植物として認識される。また、家屋周辺、空き地、芝生地、庭園、駐車場、墓地などに自然に生育し、その土地の美観を損ない、防災上の問題を発生させたりする植物として認識される。本発明では、これらいずれの植物も除草対象の雑草として含む。これらの雑草としては、具体的に、広範囲の１年生および多年生の広葉雑草およびイネ科雑草を挙げることができるが、地衣類やコケ類は本発明の除草対象には含まない。
本発明の除草対象として代表的な雑草を以下に例示するが、これらに限定されるものではない。
広葉雑草としては、例えばアサガオ、ベルベットリーフ、ヒルガオ、シロツメクサ、タンポポ、ツボスミレ、チドメグサ、メドハギ、ヤブガラシ、セイタカアワダチソウ、アレチノギク、アメリカセンダングサ、イタドリ、イヌガラシ、イヌタデ、イヌビユ、オオイヌノフグリ、オオバコ、オナモミ、カキドオシ、カタバミ、カナムグラ、カヤツリグサ、カラスノエンドウ、ギシギシ、コニシキソウ、ジシバリ、シロザ、スカシタゴボウ、スギナ、スベリヒユ、セイヨウタンポポ、タケニグサ、ツユクサ、ドクダミ、ナズナ、ノゲシ、ノボロギク、ノミノフスマ、ハコベ、ハハコグサ、ハマスゲ、ハルジオン、ヒメジョオン、ヒメムカシヨモギ、ブタクサ、ホトケノザ、ヤエムグラ、ヨモギ、ワルナスビ等が挙げられる。
イネ科雑草としては、例えばイヌビエ、エノコログサ、キンエノコロ、ムラサキエノコロ、スズメノカタビラ、スズメノテッポウ、ニワホコリ、アキメヒシバ、メヒシバ、カゼクサ、カモガヤ（オーチャードグラス）、ススキ、スズメノヒエ、チガヤ、チカラシバ、ヨシ、ササ類が挙げられる。
The weeds to be weeded according to the present invention grow around kitchen gardens, flower beds and the like, and are recognized as plants that cause damage to grown crops. It is also recognized as a plant that grows naturally around houses, vacant lands, lawns, gardens, parking lots, cemeteries, etc. and impairs the aesthetics of the area and causes problems in disaster prevention. In the present invention, all these plants are included as weeds to be weeded. These weeds may specifically include a wide range of annual and perennial broadleaf weeds and grass weeds, but lichens and mosses are not included in the subject of the present invention.
Representative weeds as the weeding object of the present invention are exemplified below, but are not limited thereto.
As broad-leaved weeds, for example, morning glory, velvet leaf, white clover, dandelion, crimson violet, crimson dregs, med alder, pokeweed, sage red persimmon, sage red alder, aesculus aqueda, edulis persimmon, tree shrews, a few moths, a dog moth, a dogwood, a horse mackerel, Anemonia japonicum, anemonefish, anchovy, anchovy, anchovy, anchovy, anchovy, anchovy, anchovy, anchovy, anemonefish, anemonefish, anemonefish, anemonefish, anemonefish, anemonefish, anemonefish, anemonefish, anemoneum Examples include ragweed, ginseng, yam grass, mugwort, warnasbi and the like.
Examples of grass weeds include raccoon dog, enokologa, kinakokoro, murasakienokoro, suzunookabira, suzumeko, pokeweed, pokeweed, pokeweed, cassava, orchard grass (orchardgrass), squeegee, pokeweed, chigaya, pokeweed, etc.
本発明の除草剤は製剤化されたものであるが、製剤型としては、例えば油剤、乳剤、水和剤、フロアブル剤（水中懸濁剤、水中乳濁剤等）、マイクロカプセル剤、粉剤、粒剤、錠剤、液剤、スプレー剤、エアゾール剤等が挙げられる。その中でも、スプレー剤やエアゾール剤等の噴霧用製剤や、液剤をジョウロヘッド付き容器に充填した散布剤等が、本発明の酢酸の除草活性を最大限に増強させ得る製剤型として、また、本発明の除草剤の製剤型として好適である。
１つの製剤型製造例として、酢酸と特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を、必要に応じて界面活性剤を用いて、溶剤に溶かして溶液（Ａ液）を調製し、このＡ液を適量の水に混合、撹拌することにより使用時に希釈する必要がない除草剤とする方法を挙げることができる。水としては、水道水、イオン交換水、蒸留水、ろ過処理した水、滅菌処理した水、地下水などが用いられる。
The herbicide of the present invention is formulated, and examples of formulation types include oils, emulsions, wettable powders, flowables (suspension in water, emulsions in water, etc.), microcapsules, powders, Granules, tablets, solutions, sprays, aerosols and the like can be mentioned. Among them, spray preparations such as sprays and aerosols, and sprays prepared by filling a solution with a container with a jouro head are also suitable as a formulation type capable of maximizing the herbicidal activity of acetic acid of the present invention. It is suitable as a formulation of the herbicide of the invention.
As one preparation example, one or more components selected from acetic acid and a specific component (a) or (a '), (b) or (c) may be used, if necessary, using a surfactant. A solution (solution A) can be prepared by dissolving in a solvent, mixing this solution A with an appropriate amount of water and stirring to obtain a herbicide that does not need to be diluted at the time of use. As water, tap water, ion exchange water, distilled water, filtered water, sterilized water, ground water, etc. are used.
製剤化の際に用いられる液体担体としては、例えばアルコール類（メタノール、エタノール、イソプロピルアルコール、ブタノール、ヘキサノール、ベンジルアルコール、エチレングリコール等）、エーテル類（ジエチルエーテル、エチレングリコールジメチルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、プロピレングリコールモノメチルエーテル、テトラヒドロフラン、ジオキサン等）、エステル類（酢酸エチル、酢酸ブチル、ミリスチン酸イソプロピル、乳酸エチル等）、ケトン類（アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン等）、芳香族または脂肪族炭化水素類（キシレン、トルエン、アルキルナフタレン、フェニルキシリルエタン、ケロシン、軽油、ヘキサン、シクロヘキサン等）、ハロゲン化炭化水素類（クロロベンゼン、ジクロロメタン、ジクロロエタン、トリクロロエタン等）、ニトリル類（アセトニトリル、イソブチロニトリル等）、スルホキシド類（ジメチルスルホキシド等）、ヘテロ環系溶剤（スルホラン、γ−ブチロラクトン、Ｎ−メチル−２−ピロリドン、Ｎ−エチル−２−ピロリドン、Ｎ−オクチル−２−ピロリドン、１，３−ジメチル−２−イミダゾリジノン）、酸アミド類（Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジメチルアセトアミド等）、炭酸アルキリデン類（炭酸プロピレン等）、植物油（大豆油、綿実油等）、植物精油（オレンジ油、ヒソップ油、レモン油等）、及び水が挙げられる。 Examples of liquid carriers used in formulation include alcohols (methanol, ethanol, isopropyl alcohol, butanol, hexanol, benzyl alcohol, ethylene glycol, etc.), ethers (diethyl ether, ethylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol Monoethyl ether, propylene glycol monomethyl ether, tetrahydrofuran, dioxane etc., esters (ethyl acetate, butyl acetate, isopropyl myristate, ethyl lactate etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone etc.), aromatic Or aliphatic hydrocarbons (xylene, toluene, alkyl naphthalene, phenyl xylyl ethane, kerosene Light oil, hexane, cyclohexane etc., halogenated hydrocarbons (chlorobenzene, dichloromethane, dichloroethane, trichloroethane etc.), nitriles (acetonitrile, isobutyronitrile etc.), sulfoxides (dimethyl sulfoxide etc.), heterocyclic solvents (sulfolane) , Γ-butyrolactone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-octyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone), acid amides (N, N- Dimethylformamide, N, N-dimethylacetamide and the like), alkylidene carbonates (propylene carbonate and the like), vegetable oils (soybean oil, cottonseed oil and the like), vegetable essential oils (orange oil, hyssop oil, lemon oil and the like), and water can be mentioned.
製剤化の際に用いられる界面活性剤としては、非イオン性界面活性剤、陰イオン性界面活性剤、陽イオン性界面活性剤、及び両性界面活性剤を用いることができる。非イオン性界面活性剤としては、例えば、ポリオキシアルキレンアリルフェニルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルフェニルエーテル、ポリオキシエチレンアリルフェニルエーテル、ポリオキシエチレンスチリルフェニルエーテル、ポリオキシエチレンアルキルフェニルエーテルホルムアルデヒド縮合物、ポリオキシエチレン−ポリオキシプロピレンブロックポリマー、ポリオキシエチレン−ポリオキシプロピレンブロックポリマーアルキルフェニルエーテル、ソルビタン脂肪酸エステル（例、ソルビタンモノオレエート、ソルビタンラウレート）、ポリオキシエチレン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル、ポリオキシエチレン硬化ヒマシ油、ポリエチレングリコール脂肪酸エーテルなどが挙げられる。陰イオン性界面活性剤としては、例えば、硫酸アルキル、ポリオキシエチレンアルキルエーテル硫酸、ポリオキシエチレンアルキルフェニルエーテル硫酸、ポリオキシエチレンベンジル（またはスチリル）フェニルエーテル硫酸またはポリオキシエチレン−ポリオキシプロピレンブロックポリマー硫酸のナトリウム、カルシウムまたはアンモニウムの各塩；スルホン酸アルキル、ジアルキルスルホサクシネート、アルキルベンゼンスルホン酸（例、ドデシルベンゼンスルホン酸カルシウムなど）、モノ−またはジ−アルキルナフタレン酸スルホン酸、ナフタレンスルホン酸ホルムアルデヒド縮合物、リグニンスルホン酸、ポリオキシエチレンアルキルフェニルエーテルスルホン酸またはポリオキシエチレンアルキルエーテルスルホサクシネートのナトリウム、カルシウム、アンモニウムまたはアルカノールアミン塩の各塩；ポリオキシエチレンアルキルエーテルホスフェート、ポリオキシエチレン、モノ−またはジ−アルキルフェニルエーテルホスフェート、ポリオキシエチレンベンジル（またはスチリル）化フェニルエーテルホスフェート、ポリオキシエチレンベンジル（またはスチリル）化フェニルエーテルホスフェート、ポリオキシエチレン−ポリオキシプロピレンブロックポリマーホスフェートのナトリウムまたはカルシウム塩などの各塩が挙げられる。陽イオン性界面活性剤としては、例えば第４級アンモニウム塩、アルキルアミン塩、アルキルピリジニウム塩、アルキルオキサイドなどが挙げられる。両性界面活性剤としては、例えばアルキルベタイン、アミンオキシドなどが挙げられる。 As surfactant used at the time of formulation, nonionic surfactant, anionic surfactant, cationic surfactant, and amphoteric surfactant can be used. As the nonionic surfactant, for example, polyoxyalkylene allyl phenyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene allyl phenyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl phenyl Ether-formaldehyde condensate, polyoxyethylene-polyoxypropylene block polymer, polyoxyethylene-polyoxypropylene block polymer alkylphenyl ether, sorbitan fatty acid ester (eg, sorbitan monooleate, sorbitan laurate), polyoxyethylene fatty acid ester, Polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyethylene glycol Such as fatty acid ether, and the like. As the anionic surfactant, for example, alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene benzyl (or styryl) phenyl ether sulfate or polyoxyethylene-polyoxypropylene block polymer Sodium, calcium or ammonium salts of sulfuric acid; alkyl sulfonates, dialkyl sulfosuccinates, alkyl benzene sulfonic acids (eg calcium dodecyl benzene sulfonate), mono- or di-alkyl naphthalene sulfonic acids, naphthalene sulfonic acid formaldehyde condensation , Lignin sulfonic acid, polyoxyethylene alkylphenyl ether sulfonic acid or polyoxyethylene alkyl ether sulfosuccine Sodium, calcium, ammonium or alkanolamine salts of the following; polyoxyethylene alkyl ether phosphate, polyoxyethylene, mono- or di-alkyl phenyl ether phosphate, polyoxyethylene benzyl (or styryl) ated phenyl ether phosphate, polyoxy acid Each salt may be mentioned such as ethylene benzyl (or styryl) ated phenyl ether phosphate, sodium or calcium salt of polyoxyethylene-polyoxypropylene block polymer phosphate. Examples of the cationic surfactant include quaternary ammonium salts, alkylamine salts, alkylpyridinium salts, alkyl oxides and the like. Amphoteric surfactants include, for example, alkyl betaines and amine oxides.
製剤化の際に用いられるガス状担体としては、例えばブタンガス、フロンガス、（ＨＦＯ、ＨＦＣ等の）代替フロン、液化石油ガス（ＬＰＧ）、ジメチルエーテル、及び炭酸ガスが、固体担体としては、例えば粘土類（カオリン、珪藻土、ベントナイト、クレー、酸性白土等）、合成含水酸化珪素、タルク、セラミック、その他の無機鉱物（セリサイト、石英、硫黄、活性炭、炭酸カルシウム、水和シリカ等）、多孔質体等が挙げられる。 Examples of gaseous carriers used in formulation include butane gas, fluorocarbon gas, alternative fluorocarbons (such as HFO and HFC), liquefied petroleum gas (LPG), dimethyl ether, and carbon dioxide gas, and solid carriers such as clays. (Kaolin, diatomaceous earth, bentonite, clay, acid clay etc), synthetic hydrous silicon oxide, talc, ceramic, other inorganic minerals (sericite, quartz, sulfur, activated carbon, calcium carbonate, hydrated silica etc.), porous body etc Can be mentioned.
本発明の除草剤は、製剤調製時に用いられている慣用の凍結防止剤、消泡剤、防腐剤、酸化防止剤及び増粘剤等を添加することができる。
凍結防止剤としては、例えば、エタノール、エチレングリコール、プロピレングリコール、エチルセロソルブ、ブチルカルビトール、３−メチル−メトキシブタノール等が挙げられる。
消泡剤としては、例えばアンチフォームＥ−２０（シリコーンエマルジョン、花王（株）、商品名）、アンチフォームＣ（東レ・ダウコーニング社、商品名）、アンチフォームＣエマルション（東レ・ダウコーニング社、商品名）、ロードシル４５４（ソルベイ社、商品名）、ロードシルアンチフォム４３２（ソルベイ社、商品名）、ＴＳＡ７３０（タナック社、商品名）、ＴＳＡ７３１（タナック社、商品名）、ＴＳＡ７３２（タナック社、商品名）、ＹＭＡ６５０９（タナック社、商品名）等のシリコーン系消泡剤、フルオウェットＰＬ８０（クラリアント社、商品名）等のフッ素系消泡剤が挙げられる。
防腐剤としては、例えばバイオホープ及びバイオホープＬ（化学名：有機窒素硫黄系複合物、有機臭素系化合物、ケイ・アイ化成（株）、商品名）、ベストサイド−７５０（化学名：イソチアゾリン系化合物、２．５〜６．０％、日本曹達（株）、商品名）、プリベントールＤ２（化学名：ベンジルアルコールモノ（ポリ）ヘミホルマル、ランクセス社、商品名）、ＰＲＯＸＥＬ ＧＸＬ（Ｓ）（化学名：１，２−ベンゾイソチアゾリン−３−オン、２０％、ロンザ社、商品名）、５−クロロ−２−メチル−４−イソチアゾリン−３−オン、２−メチル−４−イソチアゾリン−３−オン、２−ブロモ−２−ニトロプロパン−１，３−ジオール、ソルビン酸カリウム、デヒドロ酢酸ナトリウム等が挙げられる。
酸化防止剤としては、テトラキス〔メチレン−３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート〕メタン（トミノックスＴＴ、（株）エーピーアイコーポレーション、商品名／ＩＲＧＡＮＯＸ１０１０またはＩＲＧＡＮＯＸ１０１０ＥＤＳ、チバ・ジャパン（株）、商品名）、ブチル化ヒドロキシトルエン（ＢＨＴ）、ブチル化ヒドロキシ・アニソール（ＢＨＡ）、没食子酸プロピル、及びビタミンＥ、混合トコフェロール、α−トコフェロール、エトキシキン及びアスコルビン酸等が挙げられる。
増粘剤としてはＰＶＰ Ｋ−１５（化学名：ポリビニルピロリドン、東京化成工業（株）、商品名）、キサンタンガム、ポリビニルアルコール、グアーガム、カルボキシビニルポリマー等が挙げられる。
The herbicide of the present invention can be added with conventional antifreeze agents, antifoaming agents, preservatives, antioxidants, thickeners and the like which are used at the preparation of formulations.
Examples of the antifreezing agent include ethanol, ethylene glycol, propylene glycol, ethyl cellosolve, butyl carbitol, 3-methyl-methoxybutanol and the like.
As the antifoaming agent, for example, Antifoam E-20 (silicone emulsion, Kao Corporation, trade name), Antifoam C (Toray Dow Corning, trade name), Antifoam C emulsion (Toray Dow Corning, Trade name), Rhodosil 454 (Solvay, trade name), Rhodosil Anti-Fom 432 (Solvay, trade name), TSA 730 (Tank, trade name), TSA 731 (Tank, trade name), TSA 732 (Tank, Trade name), silicone-based antifoaming agents such as YMA 6509 (Tanak Co., Ltd., trade name), and fluorine-based antifoaming agents such as Fluowet PL 80 (Clariant Co., trade name).
As preservatives, for example, Biohope and Biohope L (chemical name: organic nitrogen sulfur type compound, organic bromine type compound, Kii Eye Chemical Co., Ltd., trade name), Bestside-750 (chemical name: isothiazoline type) Compound, 2.5 to 6.0%, Nippon Soda Co., Ltd. (trade name), Preventol D2 (chemical name: benzyl alcohol mono (poly) hemiformal, trade name of LANXESS, Inc.), PROXEL GXL (S) (chemical Name: 1,2-Benzisothiazolin-3-one, 20%, Lonza, trade name) 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one 2-bromo-2-nitropropane-1,3-diol, potassium sorbate, sodium dehydroacetate and the like.
As an antioxidant, tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (Tominox TT, AP I Corporation, trade name / IRGANOX1010 or IRGANO1010EDS, Ciba Japan Ltd. (trade name), butylated hydroxytoluene (BHT), butylated hydroxy anisole (BHA), propyl gallate, and vitamin E, mixed tocopherols, α-tocopherol, ethoxyquin, ascorbic acid and the like Be
Examples of the thickener include PVP K-15 (chemical name: polyvinyl pyrrolidone, manufactured by Tokyo Chemical Industry Co., Ltd., trade name), xanthan gum, polyvinyl alcohol, guar gum, carboxyvinyl polymer and the like.
本発明の除草剤は、除草したい場所１平方メートル当たり、酢酸と特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分との合計量が、好ましくは０．５〜５０ｇ、より好ましくは５〜３５ｇとなる量で散布する。施用する時期は、雑草の発生状況に応じて適宜選択すればよい。施用頻度は、雑草の発生を確認したら、１〜２週間に１回程度の頻度で施用するのがよい。施用手段は特に制限されない。 The herbicide of the present invention is a total amount of acetic acid and one or more components selected from specific components (a) or (a '), (b), (c) Preferably, the amount is 0.5 to 50 g, more preferably 5 to 35 g. The application time may be appropriately selected according to the occurrence of weeds. The application frequency should be about once every one to two weeks when weeding is confirmed. The means of application is not particularly limited.
本発明の酢酸の除草活性を増強する方法の適用場所、または、本発明の除草剤を使用する場所としては、家庭菜園、花壇、家屋周辺、空き地、芝生地、庭園、駐車場、墓地、樹木地、潅木地、ゴルフ場などが例示できるが、これらに制限されるものではなく、目的に応じて適宜使用することが可能である。 As a place of application of the method for enhancing the herbicidal activity of the acetic acid of the present invention, or a place where the herbicide of the present invention is used, a home garden, flower bed, house surroundings, open space, lawn, garden, parking lot, cemetery, trees Lands, shrub lands, golf courses and the like can be exemplified, but the present invention is not limited to these and can be appropriately used according to the purpose.
以下、処方例及び試験例等により、本発明をさらに詳しく説明するが、本発明は、これらの例に限定されるものではない。
まず、本発明の除草剤の試験検体例を示す。なお、実施例において、特に明記しない限り、部は重量部を意味する。
Hereinafter, the present invention will be described in more detail by way of formulation examples and test examples, but the present invention is not limited to these examples.
First, an example of a test sample of the herbicide of the present invention is shown. In the examples, parts mean parts by weight unless otherwise specified.
＜除草効果確認試験１＞
（１）試験検体
実施例１
酢酸１．０重量部、コハク酸１．０重量部およびイオン交換水を使用して、全体量を１００重量部として除草剤を調製した。
実施例２〜９及び比較例１〜１２は下記表１、２に示した配合で、実施例１と同様にして除草剤を調製し、それぞれの試験検体を得た。
なお、以下の実施例および比較例の除草剤の調製に際し、酢酸、コハク酸、乳酸、リンゴ酸、フマル酸、酒石酸、クエン酸は、全て和光純薬工業（株）社製の試薬を使用した。
<Weeding effect confirmation test 1>
(1) Test sample Example 1
A herbicide was prepared using a total amount of 100 parts by weight using 1.0 part by weight of acetic acid, 1.0 part by weight of succinic acid and ion-exchanged water.
In Examples 2-9 and Comparative Examples 1-12, herbicides were prepared in the same manner as in Example 1 with the formulations shown in Tables 1 and 2 below, to obtain respective test specimens.
In preparation of the herbicides of the following Examples and Comparative Examples, acetic acid, succinic acid, lactic acid, malic acid, fumaric acid, tartaric acid and citric acid all used reagents manufactured by Wako Pure Chemical Industries, Ltd. .
（２）除草活性の確認試験方法
９ｃｍポットにカタバミを生育させ、草丈が１０ｃｍ程度の植物体を試験に供した。表１、２に示す組成の試験検体（実施例１〜９および比較例１〜１２）を、トリガースプレーでそれぞれ２ｍＬ散布した。除草効果は、３日後の変色または枯死している面積割合から下記評価基準に従い６段階で評価した。
［評価基準］
「５」：８０％以上変色または枯死〜１００％枯死（完全枯死）
「４」：６０％以上８０％未満の変色または枯死
「３」：４０％以上６０％未満の変色または枯死
「２」：２０％以上４０％未満の変色または枯死
「１」：２０％未満の変色または枯死
「０」：変色なし
上記試験検体の組成と評価結果をまとめ、表１、２に示した。
(2) Confirmation Test Method of Herbicidal Activity A catablie was grown in a 9 cm pot, and a plant having a plant height of about 10 cm was subjected to the test. The test specimens having the compositions shown in Tables 1 and 2 (Examples 1 to 9 and Comparative Examples 1 to 12) were sprayed with 2 mL of the trigger spray, respectively. The herbicidal effect was evaluated in six stages according to the following evaluation criteria from the percentage of area discolored or withered after 3 days.
[Evaluation criteria]
"5": 80% or more discoloration or death to 100% death (complete death)
"4": 60% or more and less than 80% discoloration or death "3": 40% or more but less than 60% discoloration or death "2": 20% or more but less than 40% discoloration or death "1": less than 20% Discoloration or death "0": no discoloration The compositions of the test samples and the evaluation results are summarized in Tables 1 and 2.
（３）相乗効果確認
酢酸と成分（ａ）または（ａ’）を組み合わせることにより得られる相乗的な除草活性の評価は、酢酸と成分（ａ）または（ａ’）をそれぞれ単独で用いた場合（比較例１〜１１）の評価結果から、実施例１〜９の試験検体について下記計算式により評価結果を推算し、実際の評価結果をそれと比較することにより行った。実際の評価結果がその推算された評価結果よりも大きくなる場合は、それぞれ単独で用いた場合の代数和より除草活性が増強されているといえるため、相乗効果が認められると評価した。
(3) Confirmation of synergistic effect Evaluation of synergistic herbicidal activity obtained by combining acetic acid and component (a) or (a ') is when acetic acid and component (a) or (a') are used alone respectively From the evaluation results of (Comparative Examples 1 to 11), the evaluation results of the test samples of Examples 1 to 9 were estimated by the following formula, and the evaluation results were compared with the evaluation results. When the actual evaluation result is larger than the estimated evaluation result, it can be said that the synergistic activity is recognized because the herbicidal activity is enhanced by the algebraic sum when each is used alone.
計算式：評価結果の推算＝ＣＡ×ｘ／１００＋ＣＢ×ｙ／１００
ＣＡ；酢酸を単独で用いた場合（比較例２）の評価結果
ＣＢ；成分（ａ）または（ａ’）をそれぞれ単独で用いた場合（比較例３〜１１）の 評価結果
ｘ；除草剤有効成分中において、酢酸の占める割合（重量％）
ｙ；除草剤有効成分中において、成分（ａ）または（ａ’）の占める割合（重量％）
上記計算式によると、実施例１〜９の推算された評価結果は、全て「１より小さい値」である。実施例１〜９の実際の評価結果は、表１に示すとおり「１」より大きい数値であるから、本発明の除草剤は、酢酸および成分（ａ）または（ａ’）を組み合わせることにより、相乗的な除草活性が得られることが明らかとなった。
一方、比較例１や比較例１２のクエン酸は成分（ａ）または（ａ’）に含まれないトリカルボン酸の実験データであり、その除草効果評価結果より、酢酸と併用しても、酢酸の除草活性を増強することができず、相加効果以上の効果が得られないことが明らかとなった。この結果より、酢酸と成分（ａ）または（ａ’）を組み合わせることにより得られる相乗的な除草活性は、酢酸と特定成分との組み合わせにおいてのみ発現する特異的な効果であることが確認できた。
また、表１、２の実施例の評価結果、特に、コハク酸や乳酸は酢酸と組み合わせることにより、酢酸単独での除草活性を大きく増強し、優れた除草効果を得ることができることが明らかとなった。
本発明の酢酸の除草活性を増強する方法、または、本発明の除草剤が奏するこれらの効果は、本発明者が多くの実験を行い初めて確認した格別顕著な効果である。
Formula: Estimation of evaluation result = C A × x / 100 + C B × y / 100
C A ; Evaluation result when acetic acid is used alone (comparative example 2) C B ; Evaluation result when component (a) or (a ') is used alone (comparative example 3 to 11) x; The proportion of acetic acid in the active ingredients (% by weight)
y; ratio of the component (a) or (a ') in the herbicidal active ingredient (% by weight)
According to the above calculation formula, the estimated evaluation results of Examples 1 to 9 are all "value smaller than 1". Since the actual evaluation results of Examples 1 to 9 are numerical values larger than “1” as shown in Table 1, the herbicide of the present invention can be obtained by combining acetic acid and component (a) or (a ′) It became clear that synergistic herbicidal activity could be obtained.
On the other hand, the citric acid of Comparative Example 1 and Comparative Example 12 is experimental data of tricarboxylic acid which is not contained in the component (a) or (a '). It was revealed that the herbicidal activity could not be enhanced and no effect beyond additive effect could be obtained. From these results, it was confirmed that the synergistic herbicidal activity obtained by combining acetic acid and component (a) or (a ') is a specific effect that is expressed only in the combination of acetic acid and a specific component. .
In addition, as a result of evaluation of the examples in Tables 1 and 2, in particular, it becomes clear that, when succinic acid and lactic acid are combined with acetic acid, the herbicidal activity of acetic acid alone can be greatly enhanced and excellent herbicidal effects can be obtained. The
The method for enhancing the herbicidal activity of the acetic acid of the present invention, or the effect exerted by the herbicide of the present invention is an extremely remarkable effect which has been confirmed by the present inventor after many experiments.
＜除草効果確認試験２＞
（１）試験検体
実施例１０
酢酸５．０重量部、酢酸ナトリウム５．０重量部およびイオン交換水を使用して、全体量を１００重量部として除草剤を調製した。
（２）除草活性の確認試験方法
表３に示す組成の試験検体（実施例１０〜１７および比較例２、１３〜１４）を使用して、上記「除草効果確認試験１」の試験方法と評価基準に従い、評価結果を表３に示した。以下の実施例および比較例の除草剤の調製に際し、酢酸、酢酸ナトリウムは、全て和光純薬工業（株）社製の試薬を使用した。
<Weeding effect confirmation test 2>
(1) Test sample Example 10
A herbicide was prepared using 5.0 parts by weight of acetic acid, 5.0 parts by weight of sodium acetate and ion-exchanged water to make the total amount 100 parts by weight.
(2) Test method for confirmation of herbicidal activity Using the test samples (Examples 10 to 17 and Comparative Examples 2 and 13 to 14) of the composition shown in Table 3, test method and evaluation of the above-mentioned "herbicidal effect confirmation test 1" The evaluation results are shown in Table 3 according to the criteria. In preparation of the herbicides of the following examples and comparative examples, acetic acid and sodium acetate all used reagents manufactured by Wako Pure Chemical Industries, Ltd.
酢酸と成分（ａ）または（ａ’）を組み合わせることにより得られる相乗的な除草活性の評価は、上記「除草効果確認試験１」と同様に行った。１例として、推算された実施例１０の評価結果は「１．５」であり、実施例１０の実際の評価結果は「５」であるから、実際の評価結果はその推算された評価結果よりも大きい数値である。よって、本発明の除草剤は、酢酸および成分（ａ）または（ａ’）を組み合わせることにより、相乗的な除草活性が得られることが明らかとなった。同様に、実施例１１〜１７についても、相乗的な除草活性が得られることは、表３の結果からも明らかである。 Evaluation of the synergistic herbicidal activity obtained by combining an acetic acid and component (a) or (a ') was performed like said "herbicidal effect confirmation test 1". As one example, since the evaluation result of the estimated Example 10 is “1.5” and the actual evaluation result of the Example 10 is “5”, the actual evaluation result is based on the estimated evaluation result. Is also a large number. Therefore, it was revealed that the herbicide of the present invention can obtain synergistic herbicidal activity by combining acetic acid and component (a) or (a '). Similarly, it is clear also from the results of Table 3 that synergistic herbicidal activity can be obtained in Examples 11 to 17.
＜除草効果確認試験３＞
（１）試験検体
実施例１８
酢酸１．０重量部、グリセリン５．０重量部およびイオン交換水を使用して、全体量を１００重量部として除草剤を調製した。
（２）除草活性の確認試験方法
表４、５に示す組成の試験検体（実施例１８〜２７および比較例２、１５〜２３）を使用して、上記「除草効果確認試験１」の試験方法と評価基準に従い、評価結果を表４、５に示した。以下の実施例および比較例の除草剤の調製に際し、酢酸、グリセリン、プロピレングリコール、ヘキシレングリコール、エリスリトール、キシリトール、ソルビトール、ラクチトール、イソマルトは、全て和光純薬工業（株）社製の試薬を使用した。
<Weeding effect confirmation test 3>
(1) Test Sample Example 18
A herbicide was prepared at a total amount of 100 parts by weight using 1.0 part by weight of acetic acid, 5.0 parts by weight of glycerin and ion-exchanged water.
(2) Test method for confirmation of herbicidal activity Using the test samples (Examples 18 to 27 and Comparative Examples 2 and 15 to 23) of the compositions shown in Tables 4 and 5, the test method of the above-mentioned "herbicidal effect confirmation test 1" The evaluation results are shown in Tables 4 and 5 in accordance with the evaluation criteria. Acetic acid, glycerin, propylene glycol, hexylene glycol, erythritol, xylitol, sorbitol, lactitol, isomalt all use reagents manufactured by Wako Pure Chemical Industries, Ltd. in preparation of the herbicides of the following Examples and Comparative Examples. did.
酢酸と成分（ｂ）を組み合わせることにより得られる相乗的な除草活性の評価は、上記「除草効果確認試験１」と同様に行った。１例として、推算された実施例１８の評価結果は「０．１７」であり、実施例１８の実際の評価結果は「４」であるから、実際の評価結果はその推算された評価結果よりも大きい数値である。よって、本発明の除草剤は、酢酸および成分（ｂ）を組み合わせることにより、相乗的な除草活性が得られることが明らかとなった。同様に、実施例１９〜２７についても、相乗的な除草活性が得られることは、表４、５の結果からも明らかである。 Evaluation of the synergistic herbicidal activity obtained by combining an acetic acid and a component (b) was performed like said "herbicidal effect confirmation test 1". As one example, since the evaluation result of the estimated Example 18 is “0.17” and the actual evaluation result of the Example 18 is “4”, the actual evaluation result is based on the estimated evaluation result. Is also a large number. Thus, it has been clarified that the herbicide of the present invention can obtain synergistic herbicidal activity by combining acetic acid and component (b). Similarly, it is clear also from the results of Tables 4 and 5 that synergistic herbicidal activity can be obtained in Examples 19 to 27.
＜除草効果確認試験４＞
（１）試験検体
実施例２８
酢酸１．０重量部、塩化ナトリウム１．０重量部およびイオン交換水を使用して、全体量を１００重量部として除草剤を調製した。
（２）除草活性の確認試験方法
表６に示す組成の試験検体（実施例２８および比較例２、２４）を使用して、上記「除草効果確認試験１」の試験方法と評価基準に従い、評価結果を表６に示した。以下の実施例および比較例の除草剤の調製に際し、酢酸、塩化ナトリウムは、全て和光純薬工業（株）社製の試薬を使用した。
<Weeding effect confirmation test 4>
(1) Test sample Example 28
The herbicide was prepared at a total amount of 100 parts by weight using 1.0 part by weight of acetic acid, 1.0 part by weight of sodium chloride and ion exchange water.
(2) Test method for confirmation of herbicidal activity Using test specimens (Example 28 and Comparative Examples 2 and 24) of the composition shown in Table 6, evaluation according to the test method and evaluation criteria of the above-mentioned "herbicidal effect confirmation test 1" The results are shown in Table 6. In preparation of the herbicides of the following Examples and Comparative Examples, acetic acid and sodium chloride all used reagents manufactured by Wako Pure Chemical Industries, Ltd.
酢酸と成分（ｃ）を組み合わせることにより得られる相乗的な除草活性の評価は、上記「除草効果確認試験１」と同様に行った。推算された実施例２８の評価結果は「１」であり、実施例２８の実際の評価結果は「４」であるから、実際の評価結果はその推算された評価結果よりも大きい数値である。よって、本発明の除草剤は、酢酸および成分（ｃ）を組み合わせることにより、相乗的な除草活性が得られることが明らかとなった。 Evaluation of the synergistic herbicidal activity obtained by combining an acetic acid and a component (c) was performed like said "herbicidal effect confirmation test 1". Since the evaluation result of the estimated Example 28 is “1” and the actual evaluation result of the Example 28 is “4”, the actual evaluation result is a numerical value larger than the estimated evaluation result. Thus, it has been clarified that the herbicide of the present invention can obtain synergistic herbicidal activity by combining acetic acid and component (c).
本発明の酢酸の除草活性を増強する方法、または、本発明の除草剤は、低濃度では除草効果の低い酢酸と、特定の成分（ａ）または（ａ’）、（ｂ）、（ｃ）から選択される１種以上の成分を組み合わせることにより、それぞれ単独の除草活性に比べて、特異的な向上、すなわち、単に２つの成分を単独で処理したときに予想される効果を遥かに超える相乗効果が得られるという、優れた効果を奏するものである。
さらに、有効成分の含有量が低薬量であるため、環境および人やペット等の動物に対する影響もなく安全性が高く、家庭菜園、花壇、家屋周辺、空き地、芝生地、庭園、駐車場、墓地、樹木地、潅木地、ゴルフ場など雑草が発生している場所に、気軽に散布できるという特徴を有する。
The method for enhancing the herbicidal activity of the acetic acid of the present invention, or the herbicide of the present invention comprises acetic acid having low herbicidal effect at a low concentration and a specific component (a) or (a '), (b), (c) A specific improvement, ie, a synergy far exceeding the effects expected when simply treated with the two components alone, as compared to the single herbicidal activity, respectively, by combining one or more components selected from It is an excellent effect that an effect can be obtained.
Furthermore, since the active ingredient content is low, there is no impact on the environment and animals such as humans and pets, and the safety is high. Home gardens, flower beds, houses, vacant land, lawns, gardens, parking lots, It has the feature of being able to be scattered easily in places where weeds are generated, such as graveyards, woodlands, shrub lands, golf courses, etc.
Claims (2)
（ａ）炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩
（ｂ）多価アルコール
（ｃ）塩化ナトリウム A method for enhancing the herbicidal activity of acetic acid, which comprises using any one or more components selected from the following (a), (b) and (c) in combination with acetic acid.
(A) Mono- or dicarboxylic acid having 2 to 10 carbon atoms or its metal salt (b) Polyhydric alcohol (c) Sodium chloride
（ａ’）２５℃におけるｐＫａ値が３．０以上、５．０以下である炭素数２以上１０以下のモノ、ジカルボン酸またはその金属塩
（ｂ）多価アルコール
（ｃ）塩化ナトリウム A herbicide comprising acetic acid and any one or more components selected from the following (a '), (b) and (c):
(A ') mono-, dicarboxylic acid or metal salt thereof having a carbon number of 2 or more and 10 or less having a pKa value at 25 ° C. of 3.0 or more and 5.0 or less (b) polyhydric alcohol (c) sodium chloride
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| JP6921688B2 (en) | 2021-08-18 |
| JP2021169526A (en) | 2021-10-28 |
| JP7286717B2 (en) | 2023-06-05 |
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