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1.
为了明确新型化合物苯并噻二唑甲酸三氟乙酯对土传病害的诱导抗病作用,本文研究了该化合物诱导仙客来对枯萎病的抗病效果。通过叶面喷施苯并噻二唑甲酸三氟乙酯可诱导仙客来对枯萎病的抗病效果,在仙客来移栽缓苗后7d叶面喷施该化合物,不同浓度对枯萎病的抗病效果不同,其中100mg.L-1的处理,在诱导后25、30和35d的抗病效果分别为82.90%、58.59%和64.17%;在仙客来成株枯萎病发病初期用该化合物诱导,抗病效果仍可达63.91%,显著高于噁霉灵处理（47.63%）。该研究将为寻求通过叶面喷雾施药防治园艺作物土传病害的新途径起到参考作用。 相似文献
2.
2,2,2-三氟乙基苯并[1,2,3]噻二唑-7-甲酸酯对黄瓜霜霉病的诱导抗病性 总被引：2，自引：1，他引：1
为明确2,2,2-三氟乙基苯并[1,2,3]噻二唑-7-甲酸酯(简称TBTC)对蔬菜病害的诱导抗病效果,以黄瓜霜霉病Pseudoperonospora cubensis为研究对象,进行了该化合物在盆栽及田间小区条件下的诱导抗病试验。结果表明:TBTC对黄瓜霜霉病具有较好的诱抗活性,其中,盆栽试验中250 mg/L处理的平均防效为77.50%±1.79%,对照诱导抗病剂苯并噻二唑(BTH)的平均防效是71.72%±2.58%, 对照杀菌剂50%烯酰吗啉可湿性粉剂在有效成分500 mg/L处理下的平均防效为71.46%±3.01%;两年的田间试验结果显示,TBTC 250 mg/L的处理对黄瓜霜霉病的最高防效达83.94%±2.09%,而BTH的最高防效为72.39%±2.91%,50%烯酰吗啉可湿性粉剂250 mg/L的最高防效是89.08%±1.95%,表明TBTC对田间黄瓜的霜霉病可产生诱导抗病效果。 相似文献
3.
为明确2,2,2-三氟乙基苯并[1,2,3]噻二唑-7-甲酸酯(以下简称TBTC)对蔬菜病害的诱导抗病效果,以黄瓜霜霉病Pseudoperonospora cubensis为研究对象,进行了该化合物在盆栽及田间小区条件下的诱导抗病效果(以下简称诱抗效果)试验。结果表明：供试化合物对黄瓜霜霉病具有较好的诱抗活性,其中,盆栽试验中250 mg/L的处理的诱抗效果为77.50%±1.79%,相应对照诱导抗病剂苯并噻二唑（BTH）的诱抗效果是71.72%±2.58%, 对照杀菌剂50%烯酰吗啉可湿性粉剂500 mg/L处理的防效为71.46%±3.01%;两年的田间试验结果显示,供试化合物250mg/L的处理对霜霉病的最高诱抗效果达到83.94%±2.09%,而BTH的诱抗效果是69.41%±1.79%, 50%烯酰吗啉可湿性粉剂250mg/L的防效是85.90%±2.35%,表明TBTC在田间能够诱导黄瓜产生对霜霉病的诱抗效果。 相似文献
4.
1,3,4-噻二唑环在医药上已被广泛研究 ,但目前在农药中的应用相对较少。许多 1 ,3,4-噻二唑衍生物具有杀虫、除草等各种生物活性 [1 ] ,而硝基亚氨基是吡虫啉类杀虫剂中具有特殊作用的活性基团 ,我们把硝基亚氨基引入 1 ,3,4-噻二唑啉环 ,合成了系列化合物 ,期望能发现新的具有较好生物活性的化合物。选择羧酸为起始原料 ,与氨基硫脲 在脱水剂浓硫酸作用下反应关环生成 5 -烷基 - 2 -氨基 - 1 ,3,4-噻二唑 , 与发烟硝酸于 0℃左右反应 ,得到 5 -烷基 - 2 -硝基氨基 - 1 ,3,4-噻二唑 , 与硫酸酯或卤代烷反应生成目标化合物 。其合成路线… 相似文献
5.
4-甲基-1,2,3-噻二唑-5-甲酸芳酯的合成及生物活性 总被引：1，自引：0，他引：1
为了寻找高效广谱的植物激活剂候选化合物,以三乙胺为缚酸剂,通过4-甲基-1,2,3-噻二唑-5-甲酰氯与酚类化合物在二氯甲烷中于室温下反应,制得一系列共20个4-甲基-1,2,3-噻二唑-5-甲酸芳酯化合物,其中9个化合物未见文献报道,所有化合物的结构均得到了核磁共振氢谱、红外光谱、高分辨质谱的表征和确认。选择化合物 2g 培养了单晶,利用X-射线单晶衍射确证了该类化合物的空间结构。杀菌活性测定结果表明:部分化合物在50 μ g/mL下具有显著的离体杀菌活性,其中化合物 2c,2n和2o 具有广谱的杀菌活性,其EC50值在3.46~23.30 μ g/mL之间。生物活性测定结果表明,部分化合物显示了较好的抗病毒活性,大部分化合物对烟草花叶病毒(TMV)具有较好的钝化效果, 2a,2c,2d,2e,2f,2g,2l,2o 具有较好的诱导烟草抗TMV的活性。 相似文献
6.
为寻找新型活性杂环化合物,通过活性亚结构拼接,以取代苯酚和氯乙酸为起始原料,经醚化、缩合、烃基化和氨解反应,设计并采用微波辅助合成了6种未见文献报道的含苯并咪唑环的1,3,4-噻二唑酰胺衍生物,其结构经红外和核磁共振氢谱确证。初步抑菌活性测试结果表明,所有目标化合物对5种供试病原菌都表现出一定的抑菌活性,其中,化合物7c、7d、7e和7f在50 mg/L下对5种供试病原菌的抑制率均达到80%以上。 相似文献
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本文研究了我国具有自主知识产权的新型化合物氟唑活化酯诱导大白菜对根肿病的抗病效果及诱导技术。荧光染色观察发现该化合物对根肿菌休眠孢子没有明显的杀死作用,但具有明显的诱导抗病效果。不同的诱导浓度、诱导间隔期和诱导次数对根肿病的诱抗效果均不同。温室盆栽试验结果显示,25 mg/L的氟唑活化酯间隔7 d诱导大白菜3次,对根肿病的防病效果最好,达到71.33%,与诱抗剂苯并噻二唑效果相当,显著高于杀菌药剂50%氟啶胺悬浮剂拌土的防效(63.32%)。田间从苗期开始用氟唑活化酯25 mg/L诱导大白菜3次,诱导间隔期为7 d,对根肿病的诱抗效果最好达69.99%±2.01%,略低于对照杀菌剂氟啶胺拌土施药。本文明确了新型诱抗剂氟唑活化酯诱导大白菜对根肿病的抗病效果,并系统研究了施药技术,为白菜根肿病的防治提供了新手段。 相似文献
9.
氟唑活化酯诱导黄瓜抗猝倒病及其对黄瓜苗期生理指标的影响 总被引：1，自引：1，他引：0
采用室内盆栽法,测定了5%氟唑活化酯(2,2,2-三氟乙基苯并[1,2,3]噻二唑-7-甲酸酯,FBT)乳油对黄瓜猝倒病的诱导抗病作用,同时测定了其分别以喷雾和灌根处理对黄瓜苗期生理指标的影响。结果表明:氟唑活化酯以有效成分25 mg/L,间隔期7 d喷雾施药3次,对黄瓜猝倒病的防效可达77.28%。氟唑活化酯以有效成分15、25和50 mg/L的剂量喷雾或灌根处理,对黄瓜苗期的株高、节间距、鲜重和干重均有不同程度的抑制作用;以有效成分15、25 mg/L的剂量喷雾或灌根处理,对黄瓜苗期茎粗和根冠比有促进作用,但50 mg/L的剂量处理则对茎粗和根冠比表现出抑制作用。试验表明,氟唑活化酯对黄瓜猝倒病有较好的诱导抗病作用,并对黄瓜苗期的生理指标有一定影响。 相似文献
10.
张兴甲 陕西省生物农药工程技术研究中心 陕西 杨凌 魏志敏 陕西省生物农药工程技术研究中心 陕西 杨凌 王宇佳 陕西省生物农药工程技术研究中心 陕西 杨凌 杨龙港 陕西省生物农药工程技术研究中心 陕西 杨凌 袁含笑 陕西省生物农药工程技术研究中心 陕西 杨凌 冯俊涛 陕西省生物农药工程技术研究中心 陕西 杨凌 高艳清 陕西省生物农药工程技术研究中心 陕西 杨凌 雷鹏 陕西省生物农药工程技术研究中心 陕西 杨凌 马志卿 陕西省生物农药工程技术研究中心 陕西 杨凌 《农药学学报》2022,24(1):59-65
为发现具有高抑菌活性的先导化合物,结合本课题组前期研究,设计并合成了18个新型3-二氟甲基-1-甲基吡唑-4-羧酸肟酯衍生物,其结构均经核磁共振氢谱、碳谱及高分辨质谱分析确证,化合物 9g 的单晶衍射结果证明肟酯的构型为E式。离体生物活性测定结果表明,目标化合物在50 μg/mL下对番茄灰霉病菌 Botrytis cinerea、苹果树腐烂病菌Valsa mali 和小麦全蚀病菌Gaeumannomyces graminis均表现出一定的抑制活性,其中化合物 9d 对苹果树腐烂病菌、 9r 对小麦全蚀病菌的EC50值分别为0.89 μg/mL和3.34 μg/mL,表现出比先导化合物 L1 (E-2-氯-6-氟苯甲醛-O-(1-甲基-3-苯基-1H-吡唑-5-羰基)肟)
11.
吡唑并嘧啶衍生物 ((E)-N-(2-氟-4-三氟甲基苯乙烯基)-1-甲基-1H-吡唑并[3,4-d]嘧啶-4-胺,简称BDO-1) 和哒嗪酮衍生物 (4-羟基-1-(4-甲氧基苯基)-6-氧代-1,6-二氢吡嗪-3-甲酸甲酯,简称PDZ-1) 是由华东理工大学创制并合成的新化合物,本研究分别测定了其离体抑菌活性及其诱导抗病活性,并对田间应用技术进行了研究。结果表明:离体抑菌试验结果显示,BDO-1和PDZ-1对供试黄瓜的尖孢镰孢菌和多主棒孢菌并无杀菌活性;温室盆栽试验发现,2个化合物对7种蔬菜病害具有明显的诱导抗病活性,其中:BDO-1在10 mg/L下对黄瓜细菌性角斑病、黄瓜棒孢叶斑病、黄瓜枯萎病、黄瓜霜霉病、番茄早疫病、番茄灰叶斑和辣椒疫病的防治效果分别为58.81%、61.79%、69.88%、64.14%,54.42%、54.85%和63.59%;PDZ-1在10 mg/L下对黄瓜细菌性角斑病和黄瓜棒孢叶斑病的防治效果分别为62.33%和59.15%。田间防治效果验证结果表明,BDO-1和PDZ-1对黄瓜枯萎病的防治效果分别为62.95 %和48.45%。研究发现,BDO-1和PDZ-1在质量浓度为10 mg/L、诱导5次、每次间隔5d的条件下施用,对黄瓜枯萎病和棒孢叶斑病可发挥最佳防治效果。 相似文献
12.
BACKGROUND: The lead coumarin derivative (E)‐methyl 3‐methoxy‐2‐[2‐(4‐methylcoumarin‐7‐yloxymethyl)phenyl]acrylate was discovered by using an intermediate derivatisation method. To discover new coumarin derivatives with improved activity, a series of substituted coumarins were synthesised and bioassayed. RESULTS: The compounds were identified by 1H NMR, IR, MS and elemental analysis. Bioassays demonstrated that some of the title compounds exhibited excellent fungicidal activity against cucumber downy mildew at 25 mg L?1. The relationship between structure and fungicidal activity is reported. CONCLUSION: The present work demonstrates that coumarin derivatives containing methoxyacrylate moieties can be used as possible lead compounds for developing novel fungicides. Copyright © 2011 Society of Chemical Industry 相似文献
13.
2-[4-(对氟苯基)噻唑-2-基]-3-羟基-3-烃氧基丙烯腈的合成及杀菌活性 总被引：2，自引：2，他引：0
为了寻找生物活性良好的噻唑基丙烯腈类化合物,利用2-氰甲基-4-(对氟苯基)噻唑( 3 )与取代氯甲酸酯( 4 )在碱存在下反应,合成了15个未见文献报道的2- -3-羟基-3-烃氧基丙烯腈化合物( 5 ),其结构经核磁共振氢谱、质谱和元素分析表征。初步杀菌活性测试结果表明:所有化合物在试验浓度下均具有一定的抑菌活性,尤其对炭疽病菌Colletotrichum gossypii表现出较好的抑制活性,在质量浓度25 mg/L下,所有化合物的抑制率均在50%以上,其中化合物 5a、5e、5g、5k、5n和5o 的抑制率在80%以上。 相似文献
14.
Miao Li Chang‐Ling Liu Lin Li Hao Yang Zhi‐Nian Li Hong Zhang Zheng‐Ming Li 《Pest management science》2010,66(1):107-112
BACKGROUND: Strobilurins are one of the most important classes of agricultural fungicides. To discover new strobilurin analogues with high activity, a series of new strobilurin derivatives containing substituted pyrazoles in the side chain were synthesised and bioassayed. RESULTS: The compounds were identified by 1H NMR, IR, MS and elemental analysis. Preliminary bioassays indicated that some title compounds exhibited excellent fungicidal activities against Pseudoperonospora cubensis (Burk. & Curt.) Rostovsev and Erysiphe graminis DC f. sp. tritici Marchal, protecting cucumber and wheat at 6.25 and 1.56 mg L?1 respectively, and showed a moderately high acaricidal activity against Tetranychus cinnabarinus (Boisd.) at 20 mg L?1. The relationship between structure and biological activity is discussed in terms of effects of the substituent of the pyrazole ring. CONCLUSION: The present work demonstrates that strobilurin analogues with substituted phenylpyrazolylmethoxymethyl side chains can be used as possible lead compounds for further developing novel fungicides and acaricides. Copyright © 2009 Society of Chemical Industry 相似文献
15.
Induction of Systemic Resistance in Cucumber against Several Diseases by Plant Growth-promoting Fungi: lignification and Superoxide Generation 总被引：11，自引：0，他引：11
Nobuyo Koike Mitsuro Hyakumachi Koji Kageyama Shinji Tsuyumu Noriyuki Doke 《European journal of plant pathology / European Foundation for Plant Pathology》2001,107(5):523-533
Five fungal isolates (Trichoderma, Fusarium, Penicillium, Phoma and a sterile fungus) from zoysiagrass rhizosphere that promote plant growth were tested for their ability to induce systemic resistance in cucumber plants against Colletotrichum orbiculare. Roots of cucumber plants were treated with these fungal isolates using barley grain inocula (BGI), mycelial inocula (MI) or culture filtrate (CF). Most isolate/inoculum form combinations significantly reduced the disease except BGI of Trichoderma. These fungal isolates were also evaluated for induction of systemic resistance against bacterial angular leaf spot and Fusarium wilt by treatment with BGI. Penicillium, Phoma and the sterile fungus significantly reduced the disease incidence of bacterial angular leaf spot. Phoma and sterile fungus protected plants significantly against Fusarium wilt. Roots treated with CFs of these fungal isolates induced lignification at Colletotrichum penetration points indicating the presence of an elicitor in the CFs. The elicitor activity of CFs was evaluated by the chemiluminescence assay using tobacco callus and cucumber fruit disks. The CFs of all isolates elicited conspicuous superoxide generation. The chemiluminescence activity of the CF of Penicillium was extremely high, and its intensity was almost 100-fold higher than that of other isolates. The chemiluminescence activity was not lost following treatment with protease or autoclaving or after removal of lipid. The MW 12,000 dialyzed CF fraction was highly effective in eliciting chemiluminescence activity. Chemiluminescence emission from cucumber fruit disks treated with Penicillium was the same as that obtained from tobacco callus, except that the lipid fraction also showed a high activity. Both the MW 12,000 fraction and the lipid fraction induced lignification in the epidermal tissues of cucumber hypocotyls. 相似文献
16.
Allelopathy and the active metabolites of the endophytic fungus,Alternaria J46, from Platycladus orientalis 
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下载免费PDF全文 The endophytic fungus, Alternaria J46, was isolated from the stem of the medicinal plant, Platycladus orientalis. A suspension of Alternaria J46 mycelial segments and the culture filtrates of the fungi exhibited marked seed germination inhibition against the monocot wheat, large crabgrass, bromegrass, rice and barnyardgrass and weak inhibition against the dicot redroot pigweed and morning glory, but it was safe for use on soybean, rape, cucumber, tomato, lettuce and radish crops. It is possible to use J46 culture filtrates in order to prevent monocot weeds in dicot cropland. Three active metabolites were isolated from an extract of the fungus cultures and elucidated as 3‐acetyl‐5‐sec‐butyltetramic acid (1, tenuazonic acid), 3‐acetyl‐5‐iso‐butyltetramic acid (2, vivotoxin II) and cyclo‐(L‐leucyl‐L‐proline) (3). Among these three compounds, compounds 1 and 2 showed significant phytotoxic effects on the seed germination of large crabgrass, while compound 3 exhibited weak activity, and all were safe for lettuce at 100 μg mL?1. Accordingly, compounds 1 and 2 were the main active metabolites that were responsible for endophytic fungus Alternaria J46's strong seed germination inhibition against monocotyledons. 相似文献
17.
2-噻唑酰氨基环己烷基磺酰胺的合成与杀菌活性 总被引：1，自引：1，他引：0
为进一步研究环烷基磺酰胺类化合物的杀菌活性与构效关系,在前期工作基础上,合成了11个未见文献报道的2-噻唑酰氨基环己烷基磺酰胺类化合物 ( 7a ~ 7k ),其结构均经1H NMR、13C NMR、质谱和元素分析确证。分别采用菌丝生长速率法、黄瓜活体叶片法、孢子萌发法和番茄活体盆栽法对目标化合物进行了生物活性测定。结果表明:目标化合物对番茄灰霉病菌Botrytis cinerea表现出较好的抑制活性,其中化合物 7a 和 7c 在10 mg/L下对番茄灰霉病菌孢子萌发的抑制率分别为90%和67%;在200 mg/L 施药剂量下,对活体黄瓜叶片、番茄叶片和番茄花上灰霉病的防治效果,化合物 7a 分别为75%、78%和30%,化合物 7c 分别为78%、62%和44%,均优于对照药剂腐霉利,有进一步研究的价值。 相似文献
18.
Valérie Jaulneau Claude Lafitte Marie-France Corio-Costet Marciel J. Stadnik Sylvie Salamagne Xavier Briand Marie-Thérèse Esquerré-Tugayé Bernard Dumas 《European journal of plant pathology / European Foundation for Plant Pathology》2011,131(3):393-401
The protective activity of a crude extract prepared from the green macroalga, Ulva armoricana, previously shown to induce plant defence responses, was evaluated on three plant species, common bean, grapevine and cucumber,
cultivated in the greenhouse and inoculated with three powdery mildew pathogens Erysiphe polygoni, E. necator and Sphareotheca fuliginea respectively. Chemical analyses showed that the extract was enriched in ulvans, which are green algae polysaccharides essentially
composed of uronic acid and sulphated rhamnose. Weekly applications were performed by spraying of the green algal extract
at various dilutions on bean, grapevine and cucumber leaves. A significant effect (50% protection) was observed using a dilution
corresponding to about 3 g l−1 dry matter and up to 90% reduction of symptom severity was obtained for the highest concentration (1/9 dilution, 6 g l−1 dry matter) for the three plant species. To study the natural variability of the protective activity, five extracts prepared
from algae batches harvested at different year periods were evaluated. Although polysaccharide composition varied among batches,
all extracts elicit a reporter gene regulated by a defence-gene promoter in a transgenic tobacco line, and protect cucumber
plants against powdery mildew infection. Together, these data demonstrate that U. armoricana is a reproducible source of active compounds which can be used to efficiently protect crop plants against powdery mildew
diseases. 相似文献
19.
为了寻找新的含2-噻唑基丙烯腈结构的先导化合物,利用2-(4-芳基噻唑-2-基)乙腈与酰氯在吡啶或氢化钠存在下反应,合成了9个2-(4-芳基噻唑-2-基)-3-羟基丙烯腈类化合物,其中8个为新化合物,利用1H NMR、MS和元素分析对其结构进行了表征。初步的生物活性测定结果表明,部分化合物在供试浓度下具有一定的杀虫、杀菌活性,其中化合物 5f 在100 mg/L下对棉花枯萎病菌Fusarium oxysporium的抑制率超过90%,化合物 5e 在250 mg/L下对蚕豆蚜Aphis fabae的致死率达95%。毒力测定结果表明, 5e 对蚕豆蚜的活性优于对照化合物2- -3-羟基-3- 丙烯腈( 6 )。 相似文献