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JPS6319484B2 - - Google Patents
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JPS6319484B2 - - Google Patents

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Publication number
JPS6319484B2
JPS6319484B2 JP17763383A JP17763383A JPS6319484B2 JP S6319484 B2 JPS6319484 B2 JP S6319484B2 JP 17763383 A JP17763383 A JP 17763383A JP 17763383 A JP17763383 A JP 17763383A JP S6319484 B2 JPS6319484 B2 JP S6319484B2
Authority
JP
Japan
Prior art keywords
test
disease
lesions
control
parts
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.)
Expired
Application number
JP17763383A
Other languages
Japanese (ja)
Other versions
JPS6069003A (en
Inventor
Yasuo Honma
Yutaka Arimoto
Tomihiko Oosawa
Asatada Misato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RIKEN
Original Assignee
RIKEN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RIKEN filed Critical RIKEN
Priority to JP17763383A priority Critical patent/JPS6069003A/en
Publication of JPS6069003A publication Critical patent/JPS6069003A/en
Publication of JPS6319484B2 publication Critical patent/JPS6319484B2/ja
Granted legal-status Critical Current

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  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は、ヘスペリジン(Hesperidin)又は
ナリンジン(Narlngin)を有効成分として含有
することを特徴とする植物病害防除剤に関するも
のである。 従来、植物病害防除剤として銅剤、水銀剤及び
砒素剤の如き重金属化合物及び有機塩素剤が使用
され、いずれも土壌に対する汚染及び植物に対す
る薬害、更に残留毒性並びに人畜に対する毒性の
点でその製造ないし使用が禁止されているものも
あるのが現状である。 本発明者らはこれらの欠点を改善した優れた植
物病害防除剤を得ることを目的として鋭意研究を
行なつた結果、先に、5,7,4′−トリヒドロキ
シ−6′−メトキシフラバノンがかんきつ類の種々
の病害及び稲いもち病等の植物病害防除に卓効を
示し、且つ作物に対する薬害、人畜に対する毒性
及び土壌に対する汚染等が全くないことを見出し
た。(特公昭51−37322号公報参照) 本発明者らは、更に研究を進めたところ、上記
化合物とは異つたヘスペリジン及びナリジンが各
種植物病害に対して、前記化合物と同等以上の効
果を有することを見出し、本発明を完成するに至
つたものである。本発明は従来の防除剤に比し公
害のない優れた特徴を有する新規な植物病害防除
剤を提供するものである。 上記の有効成分を見出した端緒は、かんきつ類
の果実の果皮等に侵入した黒点病菌が容易に内部
へ侵入せず、貯蔵後期に至つてはじめて果実が腐
敗すること、すなわち軸腐病が発生する事実から
病原菌の侵入を阻止する或種の抑制物質が存在す
ることの知見にもとづき葉、果皮、果肉等のかん
きつ組織から該物質を抽出することに成功したこ
とに始まる。 即ち一例を示すと、貯蔵されたみかんの果盤下
組織を磨砕しn−ブタノールあるいはアセトンに
浸漬して常法により抽出して粗結晶を得、これを
過した後の残渣を酢酸エチル:ブタノン:ギ
酸:水=5:3:1:1の溶媒を用いて薄層クロ
マトグラフイーに付し、Rf値5.69,5.98の部分よ
り、それぞれ針状結晶(A)および(B)を得た。かくし
て得られた結晶(A)は、次のとおりの理化学的性質
を有する。 1 結晶形:樹枝状針状晶 2 元素分析値: C:55.21%,H:5.67%,O:39.25% 3 分子量:610.55 4 比旋光度 :〔α〕20 D=−76゜(C=2、ピリジン) 5 融点:259〜261℃ 6 溶解性:希アルカリ、ピリジンに可溶 7 NMRスペクトル:ヘスペリジンとスペクト
ルが一致した。 以上の結果より、結晶(A)は、ヘスペリジン〔ヘ
スペリチン−7−ラムノグルコシド(hesperltin
−7−rhamnoglucoside)〕と同定された。 又結晶(B)は、次のとおりの理化学的性質を有す
る。 1 結晶形:針状結晶 2 元素分析値: C:55.86%,H:5.56%,O:38.58% 3 分子量:580.53 4 融点:171℃ 5 溶解性:アセトン、アルコール、酢酸に可溶 6 比旋光度: 〔α〕19 D=−82゜〔アルコール〕 7 NMRスペクトル:ナリンジンとスペクトル
が一致した。 以上の結果より結晶(B)は、ナリンジン〔4′,
5,7−トリヒドロキシフラバノン7−ラムノグ
リコシド(4′,5,7−trihydroxyflavanone7−
rhamnoglucoside)〕と同定された。 前記物質の知見から更にその生理活性を発展さ
せて、フラボノイドを検索し、その植物病害防除
効果を調べたところいずれもかんきつ類の果実の
黒点病菌(D.citri)、青かび病菌(p.ltaiicum)、
緑かび病菌(P.digitatum)、黒腐病菌(A.citri)、
炭疸病菌(C.gloeosporioides)、灰色かび病菌
(B.cinerea)、黒斑病菌(P.cltricarpa)、軸腐病
菌(D.Citri)等及び稲いもち病(Plricularia、
oryzae)及びキユウリ炭そ病(C.Lagenarium)
等の各種植物病害に対してすぐれた防除効果を有
することが立証されたものである。 次に上記の化合物を植物病害防除剤として使用
する場合には該化合物をそのまゝ直接適用するか
または当該技術において通常知られている農薬製
剤方法に準じて適当な固体担体、液体担体及び乳
化分散剤等を用いて粒剤、粉剤、乳剤、水和剤、
錠剤、油剤及び煙霧剤等の任意の剤型にして適用
することができる。これらの担体の例としてはク
レー、カオリン、ベントナイト、酸性白土、珪藻
土、炭酸カルシウム、ニトロセルローズ、殿粉、
アラビアゴム、ベンゼン、キシレン、アルコー
ル、アセトン、ケロシン、ジメチルホルムアミド
及びフレオン等々を挙げることができる。また、
製剤上、一般に使用される補助剤例えば展着剤、
分散剤及び乳化剤等の界面活性剤として石けん、
高級アルコールの硫酸エステル、アルキルスルホ
ン酸塩、アルキルアリールスルホン酸塩、第4級
アンモニウム塩及びポリアルキレンオキサイド等
を適宜配合することができる。 有効成分の前記化合物の製剤中における配合割
合は、乳剤及び水和剤としては10〜90%程度が適
当であり、粉剤及び油剤としては0.1〜10%程度
が適当であるが使用目的に応じてこれらの濃度を
適宜増減することができる。更に本発明の防除剤
は他の農薬及び尿素、硫安、カリ塩等の肥料物質
及び土壌改良剤等と適宜混合して使用することも
できる。 次に本発明を実施例によつて示すが本発明の化
合物及び添加物はこれらに何ら限定されるもので
はない。また実施例における部は重量部を表わ
す。 実施例1 (水和剤) ヘスペリジン又はナリンジン 35部 アルキル硫酸ソーダ 5部 けい藻土 60部 以上の諸物質を均一に混合して粉砕し、主要成
分35%の水和剤を得、使用に際しては水で所定の
濃度に希釈して散布する。 実施例2 (乳剤) ヘスペリジン又はナリンジン 10部 キシレン 45部 シクロヘキサノン 40部 ポリオキシエチレンフエニルエーテル 5部 以上の諸物質を混合し溶解して主要成分10%の
乳剤を得、使用に際しては水で所定の濃度に希釈
して散布する。 実施例3 (粉剤) ヘスペリジン又はナリンジン 2部 タルク 98部 以上の諸物質を均一に混合し粉砕して主要成分
2%の粉剤を得、使用に際してはそのまゝ散布す
る。 次に本発明の防除剤の効果に関する試験例を示
すことゝする。 試験例 1 みかん黒点病に対する防除試験 a 供試植物 温州みかんの約3年生実生苗の新梢(6寸鉢2
〜4本植) b 供試薬液 実施例1に準じて製造した水和剤の希釈液を2
鉢当り40ml均一に噴霧散布する。なお対照薬剤と
して「ダイセン」(商標名)を噴霧散布する。 c 接種原及び接種方法 試験管中の病原菌培養枝に滅菌蒸留水を流し込
んで柄胞子懸濁液とし、これを150倍顕微鏡下に
一視野中約200個に調製したものを噴霧接種する。
接種後は接種箱内で約2日間湿室に保ち、充分に
感染させた後に温室に移動させる。 d 調査方法 接種後の約2〜3週間を経た新梢の全葉につい
て病斑1〜50個(1)、51〜150個(2)、151個以上(3)、
無発病(0)とに分けて調査し、次式により発病
度並びに防除価を算出する。 発病度=1×n1+2×n2+3×n3/3×N×100 (但しn1,n2,n3は夫々発病程度1,2,3の
葉数を示し、Nは総葉数を示す。) 防除価=(無処理区の発病度−処理区の発病度/無処
理区の発病度)×100 e 試験結果 第1表に示すとおりの結果が得られた。
The present invention relates to a plant disease control agent characterized by containing Hesperidin or Narlngin as an active ingredient. Conventionally, heavy metal compounds such as copper agents, mercury agents, and arsenic agents and organic chlorine agents have been used as plant disease control agents. Currently, there are some items whose use is prohibited. The present inventors conducted extensive research with the aim of obtaining an excellent plant disease control agent that improves these drawbacks, and as a result, they first discovered that 5,7,4'-trihydroxy-6'-methoxyflavanone. It has been found that it is highly effective in controlling various citrus diseases and plant diseases such as rice blast, and is completely free from chemical damage to crops, toxicity to humans and livestock, and no contamination to soil. (Refer to Japanese Patent Publication No. 51-37322) After further research, the present inventors found that hesperidin and narizin, which are different from the above-mentioned compounds, have effects on various plant diseases that are equal to or greater than those of the above-mentioned compounds. This discovery led to the completion of the present invention. The present invention provides a novel plant disease control agent that has the advantage of being less polluting than conventional pest control agents. The origin of the discovery of the above-mentioned active ingredient is the fact that the black spot fungus that invades the pericarp of citrus fruits does not easily penetrate inside, and the fruit rots only in the late stages of storage, in other words, shaft rot occurs. Based on the knowledge that there is a certain inhibitory substance that prevents the invasion of pathogenic bacteria from fruit, it was discovered that the substance was successfully extracted from citrus tissues such as leaves, pericarp, and pulp. That is, to give an example, the subdisk tissue of stored mandarin oranges is ground, immersed in n-butanol or acetone, and extracted by a conventional method to obtain crude crystals. The mixture was subjected to thin layer chromatography using a solvent of: formic acid: water = 5:3:1:1, and needle-shaped crystals (A) and (B) were obtained from the portions with Rf values of 5.69 and 5.98, respectively. The thus obtained crystal (A) has the following physical and chemical properties. 1 Crystal form: Dendritic needles 2 Elemental analysis: C: 55.21%, H: 5.67%, O: 39.25% 3 Molecular weight: 610.55 4 Specific optical rotation: [α] 20 D = -76° (C = 2 , pyridine) 5 Melting point: 259-261°C 6 Solubility: Soluble in dilute alkali and pyridine 7 NMR spectrum: Spectrum matched that of hesperidin. From the above results, crystal (A) is derived from hesperidin [hesperitin-7-rhamnoglucoside (hesperltin-7-rhamnoglucoside).
-7-rhamnoglucoside)]. Crystal (B) also has the following physical and chemical properties. 1 Crystal form: Needle crystals 2 Elemental analysis: C: 55.86%, H: 5.56%, O: 38.58% 3 Molecular weight: 580.53 4 Melting point: 171℃ 5 Solubility: Soluble in acetone, alcohol, acetic acid 6 Specific rotation Degree: [α] 19 D = -82° [Alcohol] 7 NMR spectrum: The spectrum matched that of naringin. From the above results, crystal (B) is naringin [4′,
5,7-trihydroxyflavanone 7-rhamnoglycoside (4',5,7-trihydroxyflavanone7-
rhamnoglucoside)]. Based on the knowledge of the above-mentioned substances, we further developed their physiological activities, searched for flavonoids, and investigated their plant disease control effects. All of them were found to cause black spot on citrus fruit (D. citri), blue mold fungus (P. ltaiicum),
Green mold fungus (P.digitatum), black rot fungus (A.citri),
Anthrax (C.gloeosporioides), gray mold (B.cinerea), black spot (P.cltricarpa), shaft rot (D.Citri), etc. and rice blast (Plricularia,
oryzae) and cucumber anthracnose (C. Lagenarium)
It has been proven that it has an excellent control effect against various plant diseases such as. When the above-mentioned compound is then used as a plant disease control agent, the compound can be directly applied as is or it can be prepared using a suitable solid carrier, liquid carrier and emulsifier according to methods of agrochemical formulation commonly known in the art. Granules, powders, emulsions, wettable powders, etc. using dispersants, etc.
It can be applied in any form such as tablets, oils, and aerosols. Examples of these carriers include clay, kaolin, bentonite, acid clay, diatomaceous earth, calcium carbonate, nitrocellulose, starch,
Mention may be made of gum arabic, benzene, xylene, alcohol, acetone, kerosene, dimethylformamide, freon, and the like. Also,
Auxiliary agents commonly used in formulations, such as spreading agents,
Soap, as a surfactant such as a dispersant and emulsifier.
Sulfuric esters of higher alcohols, alkyl sulfonates, alkylaryl sulfonates, quaternary ammonium salts, polyalkylene oxides, and the like can be appropriately blended. The appropriate blending ratio of the above compound as an active ingredient in the formulation is about 10 to 90% for emulsions and wettable powders, and about 0.1 to 10% for powders and oils, depending on the purpose of use. These concentrations can be increased or decreased as appropriate. Furthermore, the pesticidal agent of the present invention can be used by appropriately mixing it with other agricultural chemicals, fertilizer substances such as urea, ammonium sulfate, potassium salt, soil conditioners, and the like. Next, the present invention will be illustrated by examples, but the compounds and additives of the present invention are not limited thereto. Moreover, parts in the examples represent parts by weight. Example 1 (Hydrating agent) Hesperidin or naringin 35 parts Sodium alkyl sulfate 5 parts Diatomaceous earth 60 parts The above substances were uniformly mixed and ground to obtain a hydrating agent containing 35% of the main components. Dilute with water to the specified concentration and spray. Example 2 (Emulsion) Hesperidin or naringin 10 parts Xylene 45 parts Cyclohexanone 40 parts Polyoxyethylene phenyl ether 5 parts The above substances were mixed and dissolved to obtain an emulsion containing 10% of the main components. Dilute to a concentration of . Example 3 (Powder) 2 parts of hesperidin or naringin 98 parts of talc The above substances are mixed uniformly and pulverized to obtain a powder containing 2% of the main components, which is then sprayed as is when used. Next, a test example regarding the effect of the pesticidal agent of the present invention will be shown. Test example 1 Control test a against mandarin black spot disease Test plant New shoots of approximately 3-year-old unshiu mandarin seedlings (2 in 6-inch pots)
~4 plants) b Test chemical solution A diluted solution of the hydrating powder produced according to Example 1 was added to 2
Spray 40ml evenly per pot. As a control agent, "Daisen" (trade name) is sprayed. c. Inoculum and inoculation method Pour sterile distilled water into the pathogen culture branch in a test tube to obtain a suspension of stalk spores, and inoculate by spraying approximately 200 stalks per field of view under a 150x microscope.
After inoculation, the inoculation box is kept in a humid room for about 2 days, and after it has been sufficiently infected, it is moved to the greenhouse. d Investigation method: 1 to 50 lesions (1), 51 to 150 lesions (2), 151 or more lesions (3), on all leaves of new shoots approximately 2 to 3 weeks after inoculation.
The disease-free disease (0) and disease-free disease (0) are investigated separately, and the disease severity and control value are calculated using the following formula. Disease severity = 1 × n 1 + 2 × n 2 + 3 × n 3 /3 × N × 100 (However, n 1 , n 2 , and n 3 indicate the number of leaves with disease severity 1, 2, and 3, respectively, and N is the total number of leaves. ) Control value = (Incidence level in untreated area - Incidence level in treated area/Incidence level in untreated area) x 100 e Test results The results shown in Table 1 were obtained.

【表】 試験例 2 稲いもち病に対する防除試験 水稲籾(品種十石)を栽培用鉢に直播し(10
基/鉢)、4〜5葉期に実施例3に準じて製造し
た粉剤を散布し、その乾燥後に稲いもち病菌を噴
霧接種する。接種はもみがら培地(もみがら3
g、粉末酵母エキス0.01g、砂糖0.2g、殿粉0.05
g、水5ml)で27℃に7〜10日間培養した稲いも
ち病原菌胞子を懸濁液にして接種箱内で噴霧接種
する。接種後に24時間、25℃で恒温恒湿箱中に静
置し、その後に温室の満水バツト上にビニルケト
ンを張り、その中に静置すると接種後、5〜7日
目に発病する。発病後に一鉢当りの病斑数を調査
し防除価を算出して効力を検討した。その結果を
第2表に示す。 防除価=(無散布区病斑数−散布区病斑数/無散布区
病斑数)×100
[Table] Test Example 2 Control test against rice blast
A powder prepared according to Example 3 is applied at the 4th to 5th leaf stage (base/pot), and after drying, the rice blast fungus is spray inoculated. Inoculation is done using rice husk medium (rice husk 3
g, powdered yeast extract 0.01g, sugar 0.2g, starch 0.05
The spores of the rice blast pathogen, which had been cultured at 27°C for 7 to 10 days in 5 ml of water and 5 ml of water, were made into a suspension and inoculated by spraying in an inoculation box. After inoculation, the seeds are left in a constant temperature and humidity box at 25°C for 24 hours, and then vinyl ketone is placed over a water bucket in a greenhouse, and the plants are left to stand in the container. The disease will develop on the 5th to 7th day after inoculation. After the onset of the disease, the number of lesions per pot was investigated, the control value was calculated, and the efficacy was examined. The results are shown in Table 2. Control value = (Number of lesions in non-sprayed area - Number of lesions in sprayed area / Number of lesions in non-sprayed area) x 100

【表】 試験例 3 かんきつかいよう病(細菌病)に対する防除試
験 a 温州みかんの約3年生実生苗の新梢(6寸鉢
−4本植) b 供試薬液 実施例1に準じて製造した水和剤の希釈液を
2鉢当り40ml均一に噴霧散布する。 なお対照薬剤としてアグレプト水和剤を用い
た。 c 接種源及び接種方法 斜面培地から病原細菌を諏訪培地に移植し、
これを28℃で2日間振とう培養し、細菌数を1
×109/mlとしてこれを供試植物に噴霧接種し、
2昼夜、湿室に保つて充分感染させた後、温室
に移して3週間後に病斑数を調査した。 防除価=(無散布区病斑数−散布区病斑数/無散布区
病斑数)×100 d 試験結果 第3表に示すとおりの結果が得られた。
[Table] Test Example 3 Control test against citrus canker blight (bacterial disease) a New shoots of approximately 3-year-old unshiu mandarin seedlings (6-inch pot - 4 plants) b Test chemical solution Water produced according to Example 1 Spray 40ml of the diluted Japanese medicine mixture evenly per two pots. Note that Agrepto hydration agent was used as a control drug. c Inoculum source and inoculation method Pathogenic bacteria are transplanted from the slant culture medium to Suwa culture medium,
This was cultured with shaking at 28℃ for 2 days, and the number of bacteria was reduced to 1.
This was spray-inoculated to test plants at ×10 9 /ml,
After keeping the plants in a moist room for two days and nights to fully infect them, they were transferred to a greenhouse and the number of lesions was investigated three weeks later. Control value = (Number of lesions in non-sprayed area - Number of lesions in sprayed area / Number of lesions in non-sprayed area) x 100 d Test Results The results shown in Table 3 were obtained.

【表】 和剤
無散布(対照) − 7.7 − −
以上の試験例の結果により、本発明に係る植物
病害防除剤は糸状菌類及び細菌類に対して薬害且
つ環境汚染のない優れた防除効果を発揮するもの
であることが立証された。
[Table] Japanese preparations
No spraying (control) − 7.7 − −
The results of the above test examples demonstrate that the plant disease control agent according to the present invention exhibits excellent control effects against filamentous fungi and bacteria without causing chemical damage or environmental pollution.

Claims (1)

【特許請求の範囲】[Claims] 1 ヘスペリジン(Hesperidin)又はナリンジ
ン(Narlngin)を有効成分として含有すること
を特徴とする植物病害防除剤。
1. A plant disease control agent characterized by containing Hesperidin or Narlngin as an active ingredient.
JP17763383A 1983-09-26 1983-09-26 Plant disease control agent Granted JPS6069003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17763383A JPS6069003A (en) 1983-09-26 1983-09-26 Plant disease control agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17763383A JPS6069003A (en) 1983-09-26 1983-09-26 Plant disease control agent

Publications (2)

Publication Number Publication Date
JPS6069003A JPS6069003A (en) 1985-04-19
JPS6319484B2 true JPS6319484B2 (en) 1988-04-22

Family

ID=16034407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17763383A Granted JPS6069003A (en) 1983-09-26 1983-09-26 Plant disease control agent

Country Status (1)

Country Link
JP (1) JPS6069003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020149373A1 (en) 2019-01-16 2020-07-23 出光興産株式会社 Plant growth regulating agent

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