JP2005068031A - Plant disease-controlling agent and method for controlling the plant disease - Google Patents

Plant disease-controlling agent and method for controlling the plant disease Download PDF

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JP2005068031A
JP2005068031A JP2003209258A JP2003209258A JP2005068031A JP 2005068031 A JP2005068031 A JP 2005068031A JP 2003209258 A JP2003209258 A JP 2003209258A JP 2003209258 A JP2003209258 A JP 2003209258A JP 2005068031 A JP2005068031 A JP 2005068031A
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Prior art keywords
plant
plant disease
compound
group
controlling
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JP2003209258A
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Japanese (ja)
Inventor
Yasushi Sakaguchi
裕史 阪口
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a plant disease-controlling agent having excellent controlling effects on plant diseases, and to provide a method for controlling the plant diseases. <P>SOLUTION: The plant disease-controlling agent is characterized by containing a compound represented by formula (1) [X<SP>1</SP>and X<SP>2</SP>are each independently O or S; (n) is an integer of 0 to 3; R<SP>1</SP>is a 1 to 4C alkyl which may be substituted with one or more halogen atoms, a halogen, a 2 to 4C alkenyl, a 2 to 4C alkynyl, nitro or cyano; when (n) is 2 or 3, R<SP>1</SP>groups are each an identical or different group] as an active ingredient. The method for controlling the plant diseases is characterized by treating a plant or soil with an effective dose of the plant disease-controlling agent. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、植物病害防除剤及び植物病害の防除方法に関する。
【0002】
【従来の技術】
例えば、下記式(A)

Figure 2005068031
で示される化合物(5−(チオフェン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン,CAS番号:443667−07−0)が知られている(例えば、非特許文献1参照。)。
【0003】
【非特許文献1】
ケンブリッジ社(Chembridge,San Diego,CA,9217 USA)、CD−ROM、製品情報、2002年6月17日、製品番号6047682。
【0004】
【発明が解決しようとする課題】
しかしながら、上記式(A)で示される化合物の生物活性に関しては一切知られていない。
本発明は、植物病害の防除のために優れた効力を有する防除剤及びその防除剤を用いることを特徴とする植物病害の防除方法を提供することを課題とする。
【0005】
【課題を解決するための手段】
本発明者らは、植物病害の防除のために優れた効力を有する防除剤を見出すべく鋭意検討した結果、下記式(1)で示される化合物を有効成分とする植物病害防除剤が、優れた効力を有することを見出し、本発明を完成した。
【0006】
即ち、本発明は式(1)
Figure 2005068031
〔式中、
及びXは、各々が独立して酸素原子又は硫黄原子を表し、
nは0〜3の整数のいずれかを表し、
はハロゲン原子で置換されていてもよいC1−C4アルキル基、ハロゲン原子、C2−C4アルケニル基、C2−C4アルキニル基、ニトロ基又はシアノ基を表す。なお、nが2または3である場合、Rは各々が同一または相異なる基を表す。〕
で示される化合物(以下、本化合物と表す。)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及びその防除剤の有効量を用いることを特徴とする植物病害の防除方法を提供する。
【0007】
【発明の実施の形態】
本発明の植物病害防除剤の有効成分である本化合物において、Rで示される、
ハロゲン原子で置換されていてもよいC1−C4アルキル基としては、例えばメチル基、フルオロメチル基、ジフルオロメチル基、トリフルオロメチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、sec−ブチル基、tert−ブチル基が挙げられ、
ハロゲン原子としては、フッ素原子、塩素原子、臭素原子及びヨウ素原子が挙げられ、
C2−C4アルケニル基としては、ビニル基、1−メチルビニル基、1−プロペニル基、2−プロペニル基、1−メチル−2−プロペニル基、2−メチル−プロペニル基、2−ブテニル基及び3−ブテニル基が挙げられ、
C2−C4アルキニル基としては、エチニル基、1−プロピニル基、2−プロピニル基、1−メチル−2−プロピニル基、2−ブチニル基及び3−ブチニル基が挙げられる。
【0008】
式(1)で示される本化合物は、例えば下記の参考製造法により製造することができる。
【0009】
(参考製造法)
式(1)で示される本化合物は、式(2)で示される化合物と式(3)で示される化合物とを反応させることにより製造することができる。
Figure 2005068031
〔式中、X、X、n及びRは前記と同じ意味を表す。〕
該反応は通常溶媒の存在下、有機酸無水物の存在下で行われる。
反応に用いられる溶媒としては例えば酢酸、プロピオン酸等の有機酸があげられる。
反応に用いられる有機酸無水物としては、例えば無水酢酸、プロピオン酸無水物が挙げられる。
反応に用いられる試剤の量は、式(2)で示される化合物1モルに対して、有機酸無水物が通常1モル〜過剰量の割合であり、式(3)で示される化合物が通常1〜5モルの割合である。
該反応の反応温度は、通常50〜200℃の範囲であり、反応時間は通常0.1〜24時間の範囲である。
反応終了後は、室温付近まで放冷した反応混合物に例えばトルエン、ヘキサン等を加えた後、濾過する等の後処理操作を行うことにより、式(1)で示される化合物を単離することができる。単離された式(1)で示される化合物はクロマトグラフィー、再結晶等の操作によりさらに精製することもできる。
なお、式(3)で示される化合物は、例えば国際公開WO9735858−A1公報記載の方法に準じて製造することができる。
【0010】
本発明の植物病害防除剤の有効成分として用いられる本化合物の態様としては、例えば以下の化合物が挙げられる。
式(1)において、Xが酸素原子であり、Xが酸素原子である化合物;
式(1)において、Xが硫黄原子であり、Xが酸素原子である化合物;
式(1)において、Xが硫黄原子であり、Xが硫黄原子である化合物;
式(1)において、Xが酸素原子であり、Xが硫黄原子である化合物;
【0011】
式(1)において、nが1であり、Rがハロゲン原子で置換されていてもよいC1−C4アルキル基である化合物;
式(1)において、nが0である化合物;
式(1)において、nが1であり、Rが2位に置換した化合物;
式(1)において、nが1であり、Rが4位に置換した化合物;
式(1)において、nが1であり、Rが5位に置換した化合物;
式(1)において、nが2であり、Rが2位及び5位に置換した化合物;
式(1)において、nが2であり、Rの少なくとも1つがハロゲン原子である化合物;
式(1)において、nが2であり、Rの少なくとも1つが塩素原子である化合物。
【0012】
本発明の植物病害防除剤により防除することができる植物病害としては、例えば糸状菌による植物病害が挙げられ、より具体的には例えば以下に示される病害が挙げられる。
イネのいもち病(Pyricularia oryzae)、ごま葉枯病(Cochliobolus miyabeanus)、紋枯病(Rhizoctonia solani)、ムギ類のうどんこ病(Erysiphe graminis)、赤かび病(Fusarium culmorum, Fusarium avenaceum, Fusarium nivale, Gibberella zeae, Gibberella fujikuroi)、さび病(Puccinia striiformis, P. graminis, P. recondita, P. hordei)、雪腐病(Typhula sp.,Micronectriella nivalis)、裸黒穂病(Ustilago tritici, U. nuda)、なまぐさ黒穂病(Tilletia caries)、眼紋病(Pseudocercosporella herpotrichoides)、雲形病(Rhynchosporium secalis)、葉枯病(Septoria tritici)、ふ枯病(Leptosphaeria nodorum)、カンキツ類の黒点病(Diaporthe citri)、そうか病(Elsinoe fawcetti)、果実腐敗病(Penicillium digitatum, P. italicum)、リンゴのモニリア病(Sclerotinia mali)、腐らん病 (Valsa mali)、うどんこ病(Podosphaera leucotricha)、斑点落葉病(Alternaria mali)、黒星病(Venturia inaequalis)、ナシの黒星病(Venturia nashicola, V. pirina)、黒斑病(Alternaria kikuchiana)、赤星病(Gymnosporangium haraeanum)、モモの灰星病(Sclerotinia cinerea)、黒星病(Cladosporium carpophilum)、フォモプシス腐敗病(Phomopsis sp.)、ブドウの黒とう病(Elsinoe ampelina)、晩腐病(Glomerella cingulata)、うどんこ病(Uncinula necator)、さび病(Phakopsora ampelopsidis)、ブラックロット病(Guignardia bidwellii)、べと病(Plasmopara viticola)、カキの炭そ病(Gloeosporium kaki)、落葉病(Cercospora kaki, Mycosphaerella nawae)、ウリ類の炭そ病(Colletotrichum lagenarium)、うどんこ病(Sphaerotheca fuliginea)、つる枯病 (Mycosphaerella melonis)、つる割病(Fusarium oxysporum)、べと病(Pseudoperonospora cubensis)、疫病(Phytophthora sp.)、苗立枯病(Pythium sp.)、トマトの輪紋病(Alternaria solani)、葉かび病(Cladosporium fulvum)、疫病(Phytophthora infestans)、萎凋病(Fusarium oxysporum)、ナスの褐紋病(Phomopsis vexans)、うどんこ病(Erysiphe cichoracearum)、半枯病(Fusarium oxysporum)、アブラナ科野菜の黒斑病(Alternaria japonica)、白斑病(Cercosporella brassicae)、ホウレンソウのべと病(Perenospora spinaciae)、萎凋病(Fusarium oxysporum)、ネギのさび病(Puccinia allii)、ダイズの紫斑病(Cercospora kikuchii)、黒とう病(Elsinoe glycines)、黒点病 (Diaporthe phaseolorum var. sojae)、インゲンの炭そ病(Colletotrichum lindemthianum)、ラッカセイの黒渋病(Cercospora personata)、褐斑病(Cercospora arachidicola)、エンドウのうどんこ病(Erysiphe pisi)、ジャガイモの夏疫病(Alternaria solani)、疫病(Phytophthora infestans)、イチゴのうどんこ病(Sphaerotheca humuli)、チャの網もち病(Exobasidium reticulatum)、白星病(Elsinoe leucospila)、タバコの赤星病(Alternaria longipes)、うどんこ病(Erysiphe cichoracearum)、炭そ病(Colletotrichum tabacum)、べと病(Peronospora tabacina)、疫病(Phytophthora nicotianae)、テンサイの褐斑病(Cercospora beticola)、バラの黒星病(Diplocarpon rosae)、うどんこ病(Sphaerotheca pannosa)、キクの褐班病 (Septoria chrysanthemi−indici)、白さび病(Puccinia horiana)、その他種々の作物の灰色かび病(Botrytis cinerea)、菌核病(Sclerotinia sclerotiorum)等。
【0013】
本発明の植物病害防除剤は本化合物そのものであってもよいが、通常は固体担体、液体担体、界面活性剤その他の製剤用補助剤と混合し、乳剤、水和剤、顆粒水和剤、フロアブル剤、粉剤、粒剤等に製剤化されている。これらの製剤は本化合物を通常0.1〜90重量%含有する。
【0014】
製剤化の際に用いられる固体担体としては、例えば、カオリンクレー、アッタパルジャイトクレー、ベントナイト、モンモリロナイト、酸性白土、パイロフィライト、タルク、珪藻土、方解石等の鉱物、トウモロコシ穂軸粉、クルミ殻粉等の天然有機物、尿素等の合成有機物、炭酸カルシウム、硫酸アンモニウム等の塩類、合成含水酸化珪素等の合成無機物等からなる微粉末あるいは粒状物等が挙げられ、液体担体としては、例えば、キシレン、アルキルベンゼン、メチルナフタレン等の芳香族炭化水素類、2−プロパノール、エチレングリコール、プロピレングリコール、セロソルブ等のアルコール類、アセトン、シクロヘキサノン、イソホロン等のケトン類、ダイズ油、綿実油等の植物油、脂肪族炭化水素類、エステル類、ジメチルスルホキシド、アセトニトリル及び水が挙げられる。
【0015】
界面活性剤としては、例えば、アルキル硫酸エステル塩、アルキルアリールスルホン酸塩、ジアルキルスルホコハク酸塩、ポリオキシエチレンアルキルアリールエーテルリン酸エステル塩、リグニンスルホン酸塩、ナフタレンスルホネートホルムアルデヒド重縮合物等の陰イオン界面活性剤及びポリオキシエチレンアルキルアリールエーテル、ポリオキシエチレンアルキルポリオキシプロピレンブロックコポリマー、ソルビタン脂肪酸エステル等の非イオン界面活性剤が挙げられる。
【0016】
その他の製剤用補助剤としては、例えば、ポリビニルアルコール、ポリビニルピロリドン等の水溶性高分子、アラビアガム、アルギン酸及びその塩、CMC(カルボキシメチルセルロ−ス)、ザンサンガム等の多糖類、アルミニウムマグネシウムシリケート、アルミナゾル等の無機物、防腐剤、着色剤、PAP(酸性リン酸イソプロピル)、BHT等の安定化剤が挙げられる。
【0017】
本発明の植物病害防除剤は、例えば、植物体に茎葉処理することにより当該植物を植物病害から保護するために用いられ、また、土壌に処理することにより当該土壌に生育する植物を植物病害から保護するために用いられる。
【0018】
本発明の植物病害防除剤を植物体に茎葉処理することにより用いる場合又は土壌に処理することにより用いる場合、その処理量は、防除対象植物である作物等の種類、防除対象病害の種類、防除対象病害の発生程度、製剤形態、処理時期、気象条件等によって変化させ得るが、10000mあたり本化合物として通常1〜5000g、好ましくは5〜1000gである。
【0019】
乳剤、水和剤、フロアブル剤等は通常を水で希釈して散布することにより処理する。この場合、本化合物の濃度は通常0.0001〜5重量%、好ましくは0.0005〜1重量%の範囲である。粉剤、粒剤等は通常希釈することなくそのまま処理する。
【0020】
また、本発明の植物病害防除剤は種子消毒等の処理方法で用いることもできる。種子消毒の方法としては、例えば、本化合物の濃度が1〜10000ppmとなるように調製した本発明の植物病害防除剤に植物の種子を浸漬する方法、植物の種子に本化合物の濃度が1〜10000ppmの本発明の植物病害防除剤を噴霧もしくは塗沫する方法及び植物の種子に粉剤に製剤化された本発明の植物病害防除剤を粉衣する方法があげられる。
【0021】
本発明の植物病害の防除方法は、通常本発明の植物病害防除剤の有効量を、病害の発生が予測される植物若しくはその植物が生育する土壌に処理する、及び/又は病害の発生が確認された植物若しくはその植物が生育する土壌に処理することにより行われる。
【0022】
本発明の植物病害防除剤は通常、農園芸用植物病害防除剤、即ち畑地、水田、果樹園、茶園、牧草地、芝生地等の植物病害を防除するための植物病害防除剤として用いられる。
【0023】
本発明の植物病害防除剤は他の植物病害防除剤剤、殺虫剤、殺ダニ剤、殺線虫剤、除草剤、植物生長調節剤及び/又は肥料と共に用いることもできる。
【0024】
かかる植物病害防除剤の有効成分としては、例えば、クロロタロニル、フルアジナム、ジクロフルアニド、ホセチル−Al、環状イミド誘導体(キャプタン、キャプタホール、フォルペット等)、ジチオカーバメート誘導体(マンネブ、マンコゼブ、チラム、ジラム、ジネブ、プロピネブ等)、無機もしくは有機の銅誘導体(塩基性硫酸銅、塩基性塩化銅、水酸化銅、オキシン銅等)、アシルアラニン誘導体(メタラキシル、フララキシル、オフレース、シプロフラン、ベナラキシル、オキサジキシル等)、ストロビルリン系化合物(クレソキシムメチル、アゾキシストロビン、トリフロキシストロビン、ピコキシストロビン、ピラクロストロビン、ジモキシストロビン等)、アニリノピリミジン誘導体(シプロジニル、ピリメタニル、メパニピリム等)、フェニルピロール誘導体(フェンピクロニル、フルジオキソニル等)、イミド誘導体(プロシミドン、イプロジオン、ビンクロゾリン等)、ベンズイミダゾール誘導体(カルベンダジム、ベノミル、チアベンダゾール、チオファネートメチル等)、アミン誘導体(フェンプロピモルフ、トリデモルフ、フェンプロピジン、スピロキサミン等)、アゾール誘導体(プロピコナゾール、トリアジメノール、プロクロラズ、ペンコナゾール、テブコナゾール、フルシラゾール、ジニコナゾール、ブロモコナゾール、エポキシコナゾール、ジフェノコナゾール、シプロコナゾール、メトコナゾール、トリフルミゾール、テトラコナゾール、マイクロブタニル、フェンブコナゾール、ヘキサコナゾール、フルキンコナゾール、トリティコナゾール、ビテルタノール、イマザリル、フルトリアホール等)、シモキサニル、ジメトモルフ、ファモキサドン、フェナミドン、イプロヴァリカルブ、ベンチアバリカルブ、シアゾファミド、ゾキサミド、エタボキサム、ニコビフェン、フェンヘキサミド、キノキシフェン、ジエトフェンカルブ及びアシベンゾラールSメチルが挙げられる。
【0025】
本発明の植物病害防除剤の有効成分として用いられる本化合物としては、例えば以下の化合物が挙げられる。
【0026】
下記式(i)、(ii)、(iii)及び(iv)で示される化合物;
Figure 2005068031
Figure 2005068031
Figure 2005068031
Figure 2005068031
なお、式(i)、(ii)、(iii)及び(iv)で示される化合物とは、nが0である化合物を表すか、またはnが1〜3の整数である場合には(Rは以下の(表1)で示される基のいずれかを表す。
【0027】
【表1】
Figure 2005068031
【0028】
【実施例】
以下、本発明を製剤例、試験例及び参考製造例等により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。
【0029】
次に、本化合物の参考製造例を示す。
【0030】
参考製造例1
酢酸3mlと無水酢酸1mlとの混合液にチオバルビツール酸0.50g及び3−チオフェンカルボアルデヒド0.42gを加え、130℃で2時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(チオフェン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物1と記す。)0.73gを得た。
本化合物1
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):12.40(1H,s)、12.32(1H,s)、9.11(1H,s)、8.33(1H,s)、8.11(1H,d,J=4.1Hz)、7.69(1H,m)
【0031】
参考製造例2
酢酸12mlと無水酢酸2mlとの混合液にバルビツール酸0.50g及び3−チオフェンカルボアルデヒド0.48gを加え、120℃で2時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(チオフェン−3−イルメチレン)−2−オキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物2と記す。)0.75gを得た。
本化合物2
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):11.33(1H,s)、11.23(1H,s)、9.05(1H,d,J=2.4Hz)、8.31(1H,s)、8.09(1H,d,J=5.1Hz)、7.67〜7.69(1H,m)
【0032】
参考製造例3
酢酸12mlと無水酢酸2mlとの混合液にバルビツール酸0.50g及び3−フランカルボアルデヒド0.38gを加え、120℃で2時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(フラン−3−イルメチレン)−2−オキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物3と記す。)0.62gを得た。
本化合物3
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):11.30(1H,s)、11.22(1H,s)、8.90(1H,s)、8.21(1H,s)、7.88(1H,d,J=1.7Hz)、7.43(1H,d,J=1.7Hz)、
【0033】
参考製造例4
酢酸12mlと無水酢酸2mlとの混合液にチオバルビツール酸0.50g及び3−フランカルボアルデヒド0.33gを加え、120℃で2時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(フラン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物4と記す。)0.60gを得た。
本化合物4
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):12.39(1H,s)、12.34(1H,s)、8.95(1H,s)、8.24(1H,s)、7.90(1H,m)、7.45(1H,d,J=1.5Hz)、
【0034】
参考製造例5
酢酸10mlと無水酢酸2mlとの混合液にチオバルビツール酸1.0g及び5−メチル−3−チオフェンカルボアルデヒド0.91gを加え、120℃で1時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(5−メチルチオフェン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物5と記す。)1.3gを得た。
本化合物5
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):12.38(1H,s)、12.30(1H,s)、8.88(1H,d,J=1.4Hz)、8.19(1H,s)、7.83(1H,m)、2.50(3H,s)
【0035】
参考製造例6
酢酸10mlと無水酢酸2mlとの混合液にチオバルビツール酸0.50g及び4−メチル−3−チオフェンカルボアルデヒド0.44gを加え、120℃で2時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(4−メチルチオフェン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物6と記す。)0.70gを得た。
本化合物6
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):12.45(1H,s)、12.36(1H,s)、9.54(1H,d,J=3.2Hz)、8.22(1H,s)、7.36〜7.38(1H,m)、2.35(3H,d,J=0.7Hz)
【0036】
参考製造例7
テトラヒドロフラン15ml、トリメトキシボラン7ml、無水酢酸2mlおよび2,5−ジクロロ−3−チオフェンカルボン酸1.50gとの混合液に、ボランジメチルスルフィドコンプレックス(10〜12Mジメチルスルフィド溶液)0.76mlを0℃で加え、室温で3時間攪拌し、次いでボランジメチルスルフィドコンプレックス(10〜12Mジメチルスルフィド溶液)1mlを加え、室温で12時間攪拌した。その後、反応混合物にメタノール7mlを徐々に加え減圧下で溶媒を留去して(2,5−ジクロロチオフェン−3−イル)メタノール1.40gを得た。
(2,5−ジクロロチオフェン−3−イル)メタノール
Figure 2005068031
H−NMR(CDCl,TMS)δ(ppm):6.87(1H,s)、4.57(2H,s)、1.73(1H,brs)
【0037】
クロロホルム15ml、(2,5−ジクロルチオフェン−3−イル)メタノール1.40gおよび二酸化マンガン10gを室温で6時間間攪拌し、ついで二酸化マンガン5gを加え室温で12時間攪拌した。その後、反応混合物にを濾過し、濾過残渣をクロロホルムで洗浄した。濾液と洗液を合わせてを減圧下で溶媒を留去して2,5−ジクロロ−3−チオフェンカルボアルデヒド0.78gを得た。
2,5−ジクロロ−3−チオフェンカルボアルデヒド
Figure 2005068031
H−NMR(CDCl,TMS)δ(ppm):9.92(1H,s)、7.18(1H,s)
【0038】
酢酸10mlと無水酢酸2mlとの混合液にチオバルビツール酸0.3g及び2,5−ジクロロ−3−チオフェンカルボアルデヒド0.38gを加え、120℃で1時間撹拌した。その後、反応混合物を室温付近まで放冷し、トルエンを加えて濾過した。得られた固体をトルエン及びヘキサンで洗浄し、乾燥して5−(2,5−ジクロロチオフェン−3−イルメチレン)−2−チオキソヘキサヒドロピリミジン−4,6−ジオン(以下、本化合物7と記す。)0.35gを得た。
本化合物7
Figure 2005068031
H−NMR(CDSOCD,TMS)δ(ppm):12.55(1H,s)、12.46(1H,s)、8.08(s,1H)、8.05(1H,s)
【0039】
次に製剤例を示す。部は重量部を表す。
製剤例1
本化合物の各々50部、リグニンスルホン酸カルシウム3部、ラウリル硫酸マグネシウム2部及び合成含水酸化珪素45部をよく粉砕混合することにより、各々の水和剤を得る。
【0040】
製剤例2
本化合物の各々20部とソルビタントリオレエ−ト1.5部とを、ポリビニルアルコ−ル2部を含む水溶液28.5部と混合し、湿式粉砕法で微粉砕した後、この中に、キサンタンガム0.05部及びアルミニウムマグネシウムシリケ−ト0.1部を含む水溶液40部を加え、さらにプロピレングリコ−ル10部を加えて撹拌混合し各々の製剤を得る。
【0041】
製剤例3
本化合物の各々2部、カオリンクレー88部及びタルク10部をよく粉砕混合することにより、各々の粉剤を得る。
【0042】
製剤例4
本化合物の各々5部、ポリオキシエチレンスチリルフェニルエ−テル14部、ドデシルベンゼンスルホン酸カルシウム6部及びキシレン75部をよく混合することにより、各々の乳剤を得る。
【0043】
製剤例5
本化合物の各々2部、合成含水酸化珪素1部、リグニンスルホン酸カルシウム2部、ベントナイト30部及びカオリンクレ−65部をよく粉砕混合した後、水を加えてよく練り合せ、造粒乾燥することにより、各々の粒剤を得る。
【0044】
製剤例6
本化合物の各々10部、ポリオキシエチレンアルキルエーテルサルフェートアンモニウム塩50部を含むホワイトカーボン35部及び水55部を混合し、湿式粉砕法で微粉砕することにより、各々の製剤を得る。
【0045】
次に本発明の植物病害防除剤が効果を有することを、以下の試験例で示す。
【0046】
試験例1:トマト疫病病害効果試験
プラスチックポットに砂壌土を詰め、トマト(品種:ポンテローザ)を播種し、温室内で20日間生育させた。本化合物の各々を製剤例6に準じて製剤とした後、水で所定濃度(500ppm)に希釈し、希釈液をトマト葉面に充分付着するように茎葉散布した。散布後、葉面上の該希釈液が乾く程度に風乾し、トマト疫病の遊走子嚢懸濁液(懸濁液1mlあたり約10000個の遊走子嚢を含有する)を噴霧接種(植物1個体あたり約2mlの割合)した。接種後、23℃、相対湿度90%以上の条件下で1日間栽培し、次いで昼間24℃、夜間20℃の温室で4日間栽培した。その後、防除効果を調査した。
その結果、本化合物1〜4及び5の製剤を処理した植物上の病害面積は、無処理区の病斑面積の10%以下であった。
【0047】
試験例2:コムギふ枯れ病防除効果試験
プラスチックポットに砂壌土を詰め、コムギ(農林73号)を播種し、温室内で8日間生育させた。本化合物の各々を製剤例6に準じて製剤とした後、水で所定濃度(200ppm)に希釈し、希釈液をコムギ葉面に充分付着するように茎葉散布した。散布後、葉面上の該希釈液が乾く程度に風乾し、コムギふ枯れ病菌の胞子懸濁液を噴霧接種した。摂取後はじめは15℃、暗黒多湿下に4日間置き、さらに照明下に7日間置いた後、防除効果を調査した。
その結果、本化合物1及び5の製剤を処理した植物上の病斑面積の30%以下であった。
【0048】
試験例3:ブドウべと病防除効果試験
プラスチックポットに砂壌土を詰め、ブドウ(ベリーA)を播種し、温室内で40日間生育させた。本化合物の各々を製剤例6に準じて製剤とした後、水で所定濃度(200ppm)に希釈し、希釈液をブドウ葉面に充分付着するように茎葉散布した。散布後、葉面上の該希釈液が乾く程度に風乾し、ブドウべと病の遊走子嚢懸濁液を噴霧接種した。接種後はじめは23℃、多湿下に1日置き、さらに温室内で6日間置いた後、防除効果を調査した。
その結果、本化合物1、3、4及び5の各々の製剤を処理した植物上の病斑面積は、無処理区の病斑面積の10%以下であった。
【0049】
試験例4:コムギ赤かび病防除効果試験
プラスチックポットに砂壌土を詰め、コムギ(農林73号)を播種し、温室内で8日間生育させた。本化合物の各々を製剤例6に準じて製剤とした後、水で所定濃度(500ppm)に希釈し、これを、そのコムギ葉面に充分付着するように茎葉散布した。散布後、葉面上の該希釈液が乾く程度に風乾し、コムギ赤かび病菌の胞子懸濁液を噴霧接種した。接種後はじめは23℃、暗黒多湿下に4日置き、さらに照明下に3日間置いた後、防除効果を調査した。
その結果、本化合物1及び5を処理した植物上の病斑面積は、無処理区の病斑面積の30%以下であった。
【0050】
試験例5:トマト疫病病害効果試験
プラスチックポットに砂壌土を詰め、トマト(品種:ポンテローザ)を播種し、温室内で20日間生育させた。本化合物の各々を製剤例6に準じて製剤とした後、水で所定濃度(200ppm)に希釈し、希釈液をトマト葉面に充分付着するように茎葉散布した。散布後、葉面上の該希釈液が乾く程度に風乾し、トマト疫病の遊走子嚢懸濁液(懸濁液1mlあたり約10000個の遊走子嚢を含有する)を噴霧接種(植物1個体あたり約2mlの割合)した。接種後、23℃、相対湿度90%以上の条件下で1日間栽培し、次いで昼間24℃、夜間20℃の温室で4日間栽培した。その後、防除効果を調査した。
その結果、本化合物7の製剤を処理した植物上の病害面積は、無処理区の病斑面積の10%以下であった。
【0051】
【発明の効果】
植物病害に対して優れた防除効力を有することから、本発明の植物病害防除剤及び植物病害の防除方法は有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plant disease control agent and a method for controlling plant diseases.
[0002]
[Prior art]
For example, the following formula (A)
Figure 2005068031
(5- (thiophen-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione, CAS number: 443667-07-0) represented by reference.).
[0003]
[Non-Patent Document 1]
Cambridge (Chembridge, San Diego, CA, 9217 USA), CD-ROM, product information, June 17, 2002, product number 6047682.
[0004]
[Problems to be solved by the invention]
However, nothing is known about the biological activity of the compound represented by the above formula (A).
This invention makes it a subject to provide the control method of a plant disease characterized by using the control agent which has the outstanding effect | action for control of a plant disease, and its control agent.
[0005]
[Means for Solving the Problems]
As a result of intensive studies to find a control agent having excellent efficacy for controlling plant diseases, the present inventors have found that a plant disease control agent containing a compound represented by the following formula (1) as an active ingredient is excellent. The present invention was completed by finding that it has an effect.
[0006]
That is, the present invention provides the formula (1)
Figure 2005068031
[Where,
X 1 And X 2 Each independently represents an oxygen atom or a sulfur atom,
n represents any integer of 0 to 3,
R 1 Represents a C1-C4 alkyl group which may be substituted with a halogen atom, a halogen atom, a C2-C4 alkenyl group, a C2-C4 alkynyl group, a nitro group or a cyano group. When n is 2 or 3, R 1 Each represents the same or different groups. ]
And a plant disease control method characterized by using an effective amount of the plant disease control agent characterized by containing a compound represented by formula (hereinafter referred to as the present compound) as an active ingredient. .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present compound which is an active ingredient of the plant disease control agent of the present invention, R 1 Indicated by
Examples of the C1-C4 alkyl group optionally substituted with a halogen atom include a methyl group, a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, sec -Butyl group, tert-butyl group,
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.
C2-C4 alkenyl groups include vinyl, 1-methylvinyl, 1-propenyl, 2-propenyl, 1-methyl-2-propenyl, 2-methyl-propenyl, 2-butenyl and 3- A butenyl group,
Examples of the C2-C4 alkynyl group include ethynyl group, 1-propynyl group, 2-propynyl group, 1-methyl-2-propynyl group, 2-butynyl group and 3-butynyl group.
[0008]
The present compound represented by the formula (1) can be produced, for example, by the following reference production method.
[0009]
(Reference manufacturing method)
The present compound represented by the formula (1) can be produced by reacting a compound represented by the formula (2) with a compound represented by the formula (3).
Figure 2005068031
[Where X 1 , X 2 , N and R 1 Represents the same meaning as described above. ]
The reaction is usually carried out in the presence of a solvent and in the presence of an organic acid anhydride.
Examples of the solvent used in the reaction include organic acids such as acetic acid and propionic acid.
Examples of the organic acid anhydride used in the reaction include acetic anhydride and propionic anhydride.
The amount of the reagent used in the reaction is usually 1 mol to excess of the organic acid anhydride per 1 mol of the compound represented by the formula (2), and the compound represented by the formula (3) is usually 1 The ratio is ˜5 mol.
The reaction temperature of the reaction is usually in the range of 50 to 200 ° C., and the reaction time is usually in the range of 0.1 to 24 hours.
After completion of the reaction, the compound represented by the formula (1) can be isolated by performing post-treatment operations such as adding toluene, hexane, etc. to the reaction mixture which has been allowed to cool to near room temperature, followed by filtration. it can. The isolated compound represented by the formula (1) can be further purified by operations such as chromatography and recrystallization.
In addition, the compound shown by Formula (3) can be manufactured according to the method of international publication WO9735858-A1, for example.
[0010]
As an aspect of this compound used as an active ingredient of the plant disease control agent of this invention, the following compounds are mentioned, for example.
In formula (1), X 1 Is an oxygen atom and X 2 A compound wherein is an oxygen atom;
In formula (1), X 1 Is a sulfur atom and X 2 A compound wherein is an oxygen atom;
In formula (1), X 1 Is a sulfur atom and X 2 A compound wherein is a sulfur atom;
In formula (1), X 1 Is an oxygen atom and X 2 A compound wherein is a sulfur atom;
[0011]
In Formula (1), n is 1 and R 1 In which is a C1-C4 alkyl group optionally substituted with a halogen atom;
A compound in which n is 0 in formula (1);
In Formula (1), n is 1 and R 1 Substituted at the 2-position;
In Formula (1), n is 1 and R 1 Substituted at the 4-position;
In Formula (1), n is 1 and R 1 Substituted at the 5-position;
In the formula (1), n is 2, and R 1 Is substituted at the 2- and 5-positions;
In the formula (1), n is 2, and R 1 A compound wherein at least one of is a halogen atom;
In the formula (1), n is 2, and R 1 A compound in which at least one of the above is a chlorine atom.
[0012]
Examples of plant diseases that can be controlled with the plant disease control agent of the present invention include plant diseases caused by filamentous fungi, and more specifically, for example, the diseases shown below.
Rice blast (Piculararia oryzae), sesame leaf blight (Cochliobolus miyabeanus), blight (Rhizoctonia solani), wheat mildew (Erysiphe graminis), red mold Gibberella zeae, Gibberella fujikurooi), rust disease (Puccinia striiformis, P. graminis, P. recondita, P. hordei), snow rot (Typula sp., MicroUr. Na Thorntia caries disease, eye-spot disease (Pseudocercosporella herpotrichoides), cloud shape disease (Rhynchosporium secalis), leaf blight (Septoria tritium), blight disease (Leptospot) Blight (Elsinoe fawceti), fruit rot (Penicillium digitatum, P. italicum), apple monilia (Sclerotiniaria mary), rot (Valsa mali), powdery mildew (Podosphaera leaf spot) , Black star disease (Ventu ia inaequalis), pear black spot disease (Venturia nashicola, V. pirina), black spot disease (Alternaria kikuchiana), red spot disease (Gymnosporumium pharinaum), peach black spot Spoilage disease (Phomopsis sp.), Grape black rot (Elsinoe ampelina), late rot (Glomerella gingulata), powdery mildew (Uncinula necatidi), rust (Phakopsora ampelodisidi), black And disease (Plasmop ara viticola), oyster anthracnose (Gloeosporium kaki), deciduous leaf (Cercospora kaki, Mycosphaerella nawae), cucumber anthracnose (Colletotrichum lagenarium), mildew , Vine split disease (Fusarium oxysporum), downy mildew (Pseudoperonospora cubensis), plague (Phytophthora sp. ), Seedling blight (Pythium sp.), Tomato ring rot (Alternaria solani), leaf mold (Cladosporium fulvum), plague (Phytophthora infestans), wilt (Fusarium oxysporum), brown scab of eggplant vexans, powdery mildew (Erysiphe cichoacearum), half blight (Fusarium oxysporum), black spot disease of cruciferous vegetables (Alternaria japonica), white spot (Cercosporella brassicae), rot psoriasis (Fusarium oxysporum), spring onion rust (Puccinia all) ii) Soybean purpura (Cercospora kikuchii), black scab (Elsinoe glycines), sunspot (Diaporthe phaseolum var. sojae), bean anthracnose (Colletotrichum sp.) Brown spot disease (Cercospora arachidicola), pea powdery mildew (Erysiphe pisi), potato summer plague (Alternaria solani), plague (Phytophathora infestans), strawberry powdery mildew (Sphaehathiae) reticulatum), white Diseases (Elsinoe leucospira), tobacco red streak (Alternaria longipes), powdery mildew (Erysiphe cichoraceraum), anthracnose (Colletotrica phytopathia), downy mildew (Peronosporitabac) (Cercospora beticola), rose scab (Diplocarpon rosae), powdery mildew (Sphaerotheca pannosa), chrysanthemum blight (Septoria chrysanthemi-indici), white rust (a) (Botrytis cinerea), Rot (Sclerotinia sclerotiorum) and the like.
[0013]
The plant disease control agent of the present invention may be the present compound itself, but usually mixed with a solid carrier, a liquid carrier, a surfactant, or other formulation adjuvants, emulsion, wettable powder, granular wettable powder, It is formulated into flowables, powders and granules. These preparations usually contain 0.1 to 90% by weight of the present compound.
[0014]
Examples of solid carriers used for formulation include kaolin clay, attapulgite clay, bentonite, montmorillonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite, etc., corn cob flour, walnut shell flour Examples include natural organic materials such as urea, synthetic organic materials such as urea, salts such as calcium carbonate and ammonium sulfate, and fine powders or granular materials such as synthetic inorganic materials such as synthetic silicon hydroxide. Examples of liquid carriers include xylene and alkylbenzene. , Aromatic hydrocarbons such as methylnaphthalene, alcohols such as 2-propanol, ethylene glycol, propylene glycol and cellosolve, ketones such as acetone, cyclohexanone and isophorone, vegetable oils such as soybean oil and cottonseed oil, and aliphatic hydrocarbons , Esters, dimethylsulfur Kishido include acetonitrile and water.
[0015]
Examples of the surfactant include anions such as alkyl sulfate ester salt, alkyl aryl sulfonate salt, dialkyl sulfo succinate salt, polyoxyethylene alkyl aryl ether phosphate ester salt, lignin sulfonate salt, naphthalene sulfonate formaldehyde polycondensate. Nonionic surfactants such as surfactants and polyoxyethylene alkyl aryl ethers, polyoxyethylene alkyl polyoxypropylene block copolymers, sorbitan fatty acid esters and the like can be mentioned.
[0016]
Other formulation adjuvants include, for example, water-soluble polymers such as polyvinyl alcohol and polyvinyl pyrrolidone, gum arabic, alginic acid and salts thereof, polysaccharides such as CMC (carboxymethyl cellulose) and xanthan gum, aluminum magnesium silicate, Examples thereof include inorganic substances such as alumina sol, preservatives, colorants, PAP (isopropyl acid phosphate), and stabilizers such as BHT.
[0017]
The plant disease control agent of the present invention is used, for example, to protect the plant from plant diseases by treating the plant body with foliage, and from the plant diseases, the plant growing in the soil by treating the soil. Used to protect.
[0018]
When the plant disease control agent of the present invention is used by treating the plant body with foliage treatment or by treating it with soil, the treatment amount depends on the type of crop, the type of disease to be controlled, and the control type. It can be changed according to the degree of target disease occurrence, formulation, treatment time, weather conditions, etc. 2 This compound is usually 1 to 5000 g, preferably 5 to 1000 g per compound.
[0019]
Emulsions, wettable powders and flowables are usually treated by diluting with water and spraying. In this case, the concentration of the present compound is usually 0.0001 to 5% by weight, preferably 0.0005 to 1% by weight. Powders, granules, etc. are usually processed without dilution.
[0020]
Moreover, the plant disease control agent of this invention can also be used by processing methods, such as seed disinfection. Examples of the method of seed disinfection include a method of immersing plant seeds in the plant disease control agent of the present invention prepared so that the concentration of the present compound is 1 to 10,000 ppm, and the concentration of the present compound is 1 to Examples thereof include a method of spraying or spreading 10,000 ppm of the plant disease control agent of the present invention, and a method of dressing the plant disease control agent of the present invention formulated into a powder on plant seeds.
[0021]
In the method for controlling plant diseases of the present invention, the effective amount of the plant disease control agent of the present invention is usually treated on the plant where the occurrence of the disease is predicted or the soil where the plant grows, and / or the occurrence of the disease is confirmed. It is carried out by treating the applied plant or the soil on which the plant grows.
[0022]
The plant disease control agent of the present invention is usually used as a plant disease control agent for agricultural and horticultural use, that is, a plant disease control agent for controlling plant diseases such as upland, paddy fields, orchards, tea gardens, pastures, and lawns.
[0023]
The plant disease control agent of the present invention can be used together with other plant disease control agents, insecticides, acaricides, nematicides, herbicides, plant growth regulators and / or fertilizers.
[0024]
As an active ingredient of such a plant disease control agent, for example, chlorothalonil, fluazinam, diclofuranide, fosetyl-Al, cyclic imide derivatives (captan, captohol, phorpet, etc.), dithiocarbamate derivatives (manneb, mancozeb, thiram, Ziram, dineb, propineb, etc.), inorganic or organic copper derivatives (basic copper sulfate, basic copper chloride, copper hydroxide, oxine copper, etc.), acylalanine derivatives (metalaxyl, furaxyl, off race, cyprofuran, benalaxyl, oxadixyl) ), Strobilurin compounds (cresoxime methyl, azoxystrobin, trifloxystrobin, picoxystrobin, pyraclostrobin, dimoxystrobin, etc.), anilinopyrimidine derivatives (cyprodinil, pyrimethanil, mepa) Pyrim, etc.), phenylpyrrole derivatives (phenpiclonyl, fludioxonil, etc.), imide derivatives (procymidone, iprodione, vinclozoline, etc.), benzimidazole derivatives (carbendazim, benomyl, thiabendazole, thiophanatemethyl, etc.), amine derivatives (fenpropimorph, tridemorph, phen) Propidine, spiroxamine, etc.), azole derivatives (propiconazole, triadimenol, prochloraz, penconazole, tebuconazole, flusilazole, diniconazole, bromoconazole, epoxiconazole, difenoconazole, cyproconazole, metconazole, triflumizole, tetraco Nazole, Microbutanyl, Fenbuconazole, Hexaconazole, Fluquinconazole, Tritico Sol, viteltanol, imazalyl, flutriahol, etc.), simoxanyl, dimethomorph, famoxadone, fenamidone, iprovaricarb, benchavaricarb, cyazofamide, zoxamide, ethaboxam, nicobifen, fenhexamide, quinoxyphene, dietofencarb and acibenzoral S And methyl.
[0025]
As this compound used as an active ingredient of the plant disease control agent of this invention, the following compounds are mentioned, for example.
[0026]
Compounds represented by the following formulas (i), (ii), (iii) and (iv);
Figure 2005068031
Figure 2005068031
Figure 2005068031
Figure 2005068031
The compounds represented by formulas (i), (ii), (iii) and (iv) represent compounds in which n is 0, or when n is an integer of 1 to 3 (R 1 ) n Represents one of the groups shown in the following (Table 1).
[0027]
[Table 1]
Figure 2005068031
[0028]
【Example】
Hereinafter, the present invention will be described in more detail with reference to formulation examples, test examples, reference production examples, and the like, but the present invention is not limited to these examples.
[0029]
Next, Reference Production Examples of this compound are shown.
[0030]
Reference production example 1
0.50 g of thiobarbituric acid and 0.42 g of 3-thiophenecarbaldehyde were added to a mixed solution of 3 ml of acetic acid and 1 ml of acetic anhydride, and the mixture was stirred at 130 ° C. for 2 hours. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane and dried to give 5- (thiophen-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 1). 73 g was obtained.
Compound 1
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 12.40 (1H, s), 12.32 (1H, s), 9.11 (1H, s), 8.33 (1H, s), 8.11 (1H, d, J = 4.1 Hz), 7.69 (1H, m)
[0031]
Reference production example 2
To a mixed solution of 12 ml of acetic acid and 2 ml of acetic anhydride were added 0.50 g of barbituric acid and 0.48 g of 3-thiophenecarbaldehyde, and the mixture was stirred at 120 ° C. for 2 hours. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane, dried, and 0.75 g of 5- (thiophen-3-ylmethylene) -2-oxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 2). Got.
Compound 2
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 11.33 (1H, s), 11.23 (1H, s), 9.05 (1H, d, J = 2.4 Hz), 8.31 (1H, s), 8.09 (1H, d, J = 5.1 Hz), 7.67-7.69 (1H, m)
[0032]
Reference production example 3
Barbituric acid 0.50 g and 3-furancarbaldehyde 0.38 g were added to a mixed solution of acetic acid 12 ml and acetic anhydride 2 ml, and the mixture was stirred at 120 ° C. for 2 hours. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane, dried, and 0.62 g of 5- (furan-3-ylmethylene) -2-oxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 3). Got.
Compound 3
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 11.30 (1H, s), 11.22 (1H, s), 8.90 (1H, s), 8.21 (1H, s), 7.88 (1H, d, J = 1.7 Hz), 7.43 (1H, d, J = 1.7 Hz),
[0033]
Reference production example 4
0.50 g of thiobarbituric acid and 0.33 g of 3-furancarbaldehyde were added to a mixture of 12 ml of acetic acid and 2 ml of acetic anhydride, and the mixture was stirred at 120 ° C. for 2 hours. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane and dried to give 5- (furan-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 4). 60 g was obtained.
Compound 4
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 12.39 (1H, s), 12.34 (1H, s), 8.95 (1H, s), 8.24 (1H, s), 7.90 (1H, m), 7.45 (1H, d, J = 1.5 Hz),
[0034]
Reference production example 5
1.0 g of thiobarbituric acid and 0.91 g of 5-methyl-3-thiophenecarbaldehyde were added to a mixed solution of 10 ml of acetic acid and 2 ml of acetic anhydride, and the mixture was stirred at 120 ° C. for 1 hour. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane, dried, and 5- (5-methylthiophen-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 5). ) 1.3 g was obtained.
Compound 5
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 12.38 (1H, s), 12.30 (1H, s), 8.88 (1H, d, J = 1.4 Hz), 8.19 (1H, s), 7.83 (1H, m), 2.50 (3H, s)
[0035]
Reference production example 6
0.50 g of thiobarbituric acid and 0.44 g of 4-methyl-3-thiophenecarbaldehyde were added to a mixed solution of 10 ml of acetic acid and 2 ml of acetic anhydride, and stirred at 120 ° C. for 2 hours. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane, dried, and 5- (4-methylthiophen-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione (hereinafter referred to as the present compound 6). ) 0.70 g was obtained.
Compound 6
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 12.45 (1H, s), 12.36 (1H, s), 9.54 (1H, d, J = 3.2 Hz), 8.22 (1H, s), 7.36-7.38 (1H, m), 2.35 (3H, d, J = 0.7 Hz)
[0036]
Reference production example 7
To a mixed solution of 15 ml of tetrahydrofuran, 7 ml of trimethoxyborane, 2 ml of acetic anhydride and 1.50 g of 2,5-dichloro-3-thiophenecarboxylic acid, 0.76 ml of borane dimethyl sulfide complex (10-12 M dimethyl sulfide solution) was added at 0 ° C. The mixture was stirred at room temperature for 3 hours, then 1 ml of borane dimethyl sulfide complex (10-12M dimethyl sulfide solution) was added, and the mixture was stirred at room temperature for 12 hours. Thereafter, 7 ml of methanol was gradually added to the reaction mixture, and the solvent was distilled off under reduced pressure to obtain 1.40 g of (2,5-dichlorothiophen-3-yl) methanol.
(2,5-dichlorothiophen-3-yl) methanol
Figure 2005068031
1 H-NMR (CDCl 3 , TMS) δ (ppm): 6.87 (1H, s), 4.57 (2H, s), 1.73 (1H, brs)
[0037]
15 ml of chloroform, 1.40 g of (2,5-dichlorothiophen-3-yl) methanol and 10 g of manganese dioxide were stirred at room temperature for 6 hours, then 5 g of manganese dioxide was added and stirred at room temperature for 12 hours. Thereafter, the reaction mixture was filtered, and the filtration residue was washed with chloroform. The filtrate and washing solution were combined, and the solvent was distilled off under reduced pressure to obtain 0.78 g of 2,5-dichloro-3-thiophenecarbaldehyde.
2,5-dichloro-3-thiophenecarbaldehyde
Figure 2005068031
1 H-NMR (CDCl 3 , TMS) δ (ppm): 9.92 (1H, s), 7.18 (1H, s)
[0038]
0.3 g of thiobarbituric acid and 0.38 g of 2,5-dichloro-3-thiophenecarbaldehyde were added to a mixed solution of 10 ml of acetic acid and 2 ml of acetic anhydride, and the mixture was stirred at 120 ° C. for 1 hour. Thereafter, the reaction mixture was allowed to cool to near room temperature, toluene was added, and the mixture was filtered. The obtained solid was washed with toluene and hexane, and dried to give 5- (2,5-dichlorothiophen-3-ylmethylene) -2-thioxohexahydropyrimidine-4,6-dione (hereinafter referred to as Compound 7). 0.35 g was obtained.
Compound 7
Figure 2005068031
1 H-NMR (CD 3 SOCD 3 , TMS) δ (ppm): 12.55 (1H, s), 12.46 (1H, s), 8.08 (s, 1H), 8.05 (1H, s)
[0039]
Next, formulation examples are shown. Parts represent parts by weight.
Formulation Example 1
50 parts of each of the present compounds, 3 parts of calcium lignin sulfonate, 2 parts of magnesium lauryl sulfate, and 45 parts of synthetic hydrous silicon oxide are pulverized and mixed well to obtain each wettable powder.
[0040]
Formulation Example 2
20 parts of each of the present compounds and 1.5 parts of sorbitan trioleate are mixed with 28.5 parts of an aqueous solution containing 2 parts of polyvinyl alcohol and finely pulverized by a wet pulverization method. 40 parts of an aqueous solution containing 0.05 part and 0.1 part of aluminum magnesium silicate are added, and 10 parts of propylene glycol is further added and mixed by stirring to obtain each preparation.
[0041]
Formulation Example 3
2 parts of each of the present compounds, 88 parts of kaolin clay and 10 parts of talc are thoroughly pulverized and mixed to obtain each powder.
[0042]
Formulation Example 4
Each emulsion is obtained by thoroughly mixing 5 parts of this compound, 14 parts of polyoxyethylene styrylphenyl ether, 6 parts of calcium dodecylbenzenesulfonate and 75 parts of xylene.
[0043]
Formulation Example 5
By thoroughly crushing and mixing 2 parts each of this compound, 1 part of synthetic hydrous silicon oxide, 2 parts of calcium lignin sulfonate, 30 parts of bentonite and 65 parts of kaolin clay, kneading well with water, granulating and drying , Get each granule.
[0044]
Formulation Example 6
10 parts of each of the present compounds, 35 parts of white carbon containing 50 parts of polyoxyethylene alkyl ether sulfate ammonium salt and 55 parts of water are mixed and finely pulverized by a wet pulverization method to obtain each preparation.
[0045]
Next, the following test examples show that the plant disease control agent of the present invention has an effect.
[0046]
Test Example 1: Tomato plague disease effect test
A plastic pot was filled with sandy loam, seeded with tomato (variety: Ponterosa), and grown in a greenhouse for 20 days. Each of the compounds was formulated according to Formulation Example 6, diluted with water to a predetermined concentration (500 ppm), and sprayed with foliage so that the diluted solution was sufficiently attached to the tomato leaf surface. After spraying, air-dry to the extent that the diluted solution on the leaf surface is dried, and spray inoculate with a tomato epidemic zoospore suspension (containing about 10,000 zoospore sac per ml of suspension) About 2 ml). After inoculation, the plants were cultivated for 1 day under conditions of 23 ° C. and a relative humidity of 90% or more, and then cultivated in a greenhouse at 24 ° C. during the day and 20 ° C. during the night for 4 days. Then, the control effect was investigated.
As a result, the disease area on the plant treated with the preparations of the present compounds 1 to 4 and 5 was 10% or less of the lesion area in the untreated area.
[0047]
Test example 2: wheat dry blight control effect test
A plastic pot was filled with sandy loam, wheat (Agricultural Forest No. 73) was sown and grown in a greenhouse for 8 days. Each of the compounds was formulated according to Formulation Example 6, diluted with water to a predetermined concentration (200 ppm), and the diluted solution was sprayed on the foliage so as to adhere well to the wheat leaf surface. After spraying, the diluted solution on the leaf surface was air-dried to the extent that it was dry and spray-inoculated with a spore suspension of a wheat blight fungus. After ingestion, it was placed at 15 ° C. under dark and humid conditions for 4 days and further placed under illumination for 7 days, and then the control effect was investigated.
As a result, it was 30% or less of the lesion area on the plant treated with the preparations of the present compounds 1 and 5.
[0048]
Test Example 3: Grape downy mildew control effect test
A plastic pot was filled with sandy loam, sown with grapes (Berry A), and grown in a greenhouse for 40 days. Each of the compounds was formulated according to Formulation Example 6, diluted with water to a predetermined concentration (200 ppm), and the diluted solution was sprayed on the foliage so as to adhere well to the vine leaves. After spraying, it was air-dried to the extent that the diluted solution on the leaf surface was dried, and sprayed and inoculated with a zoosporangium suspension of grape mildew. After the inoculation, it was placed at 23 ° C. under high humidity for 1 day and further placed in a greenhouse for 6 days, and then the control effect was investigated.
As a result, the lesion area on the plant treated with each of the preparations of the present compounds 1, 3, 4 and 5 was 10% or less of the lesion area in the untreated section.
[0049]
Test Example 4: Wheat red mold control effect test
A plastic pot was filled with sandy loam, wheat (Agricultural Forest No. 73) was sown and grown in a greenhouse for 8 days. Each of the compounds was formulated according to Formulation Example 6, diluted with water to a predetermined concentration (500 ppm), and sprayed on the foliage so that it adhered sufficiently to the wheat leaf surface. After spraying, it was air-dried to such an extent that the diluted solution on the leaf surface was dried and spray inoculated with a spore suspension of wheat mold. After the inoculation, it was placed at 23 ° C. under dark and humid conditions for 4 days and further under illumination for 3 days, and then the control effect was investigated.
As a result, the lesion area on the plant treated with the present compounds 1 and 5 was 30% or less of the lesion area in the untreated section.
[0050]
Test Example 5: Tomato plague disease effect test
A plastic pot was filled with sandy loam, seeded with tomato (variety: Ponterosa), and grown in a greenhouse for 20 days. Each of the compounds was formulated according to Formulation Example 6, diluted with water to a predetermined concentration (200 ppm), and the diluted solution was sprayed on the foliage so as to adhere well to the tomato leaf surface. After spraying, air-dry to the extent that the diluted solution on the leaf surface is dried, and spray inoculate with a tomato epidemic zoospore suspension (containing about 10,000 zoospore sac per ml of suspension) About 2 ml). After inoculation, the plants were cultivated for 1 day under conditions of 23 ° C. and a relative humidity of 90% or more, and then cultivated in a greenhouse at 24 ° C. during the day and 20 ° C. during the night for 4 days. Then, the control effect was investigated.
As a result, the disease area on the plant treated with the preparation of Compound 7 was 10% or less of the lesion area in the untreated area.
[0051]
【The invention's effect】
Since it has an excellent control effect against plant diseases, the plant disease control agent and the method for controlling plant diseases of the present invention are useful.

Claims (2)

式(1)
Figure 2005068031
〔式中、
及びXは、各々が独立して酸素原子又は硫黄原子を表し、
nは0〜3の整数のいずれかを表し、
はハロゲン原子で置換されていてもよいC1−C4アルキル基、ハロゲン原子、C2−C4アルケニル基、C2−C4アルキニル基、ニトロ基又はシアノ基を表す。なお、nが2または3である場合、Rは各々が同一または相異なる基を表す。〕
で示される化合物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。
Formula (1)
Figure 2005068031
[Where,
X 1 and X 2 each independently represent an oxygen atom or a sulfur atom,
n represents any integer of 0 to 3,
R 1 represents a C1-C4 alkyl group optionally substituted with a halogen atom, a halogen atom, a C2-C4 alkenyl group, a C2-C4 alkynyl group, a nitro group or a cyano group. When n is 2 or 3, each R 1 represents the same or different group. ]
The plant disease control agent characterized by containing the compound shown by these as an active ingredient.
請求項1記載の植物病害防除剤の有効量を植物又は土壌に処理することを特徴とする植物病害の防除方法。A plant disease control method comprising treating an effective amount of the plant disease control agent according to claim 1 to a plant or soil.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108069776A (en) * 2017-11-22 2018-05-25 山东京青农业科技有限公司 A kind of microbial-bacterial fertilizer for preventing potato wilt and its preparation method and application

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108069776A (en) * 2017-11-22 2018-05-25 山东京青农业科技有限公司 A kind of microbial-bacterial fertilizer for preventing potato wilt and its preparation method and application

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