Summa Phytopathologica最新文献_第2页

Quanto a eficácia do tratamento de sementes com fungicidas. - Ênfase em grandes culturas de grãos 用杀菌剂处理种子的效果如何?-强调大型粮食作物

Summa Phytopathologica Pub Date : 2022-10-01 DOI: 10.1590/0100-5405/269402

E. M. Reis, A. C. Reis, Mateus Zanatta

引用次数: 0

Frequency of fungi associated with Creole corn seeds under different environmental conditions in Guerrero, Mexico 墨西哥格雷罗不同环境条件下与克里奥尔玉米种子相关的真菌频率

Summa Phytopathologica Pub Date : 2022-10-01 DOI: 10.1590/0100-5405/260498

Guadalupe García-Solano, F. Palemón-Alberto, S. Á. Ortega-Acosta, A. Damián-Nava, P. Juárez-López, Paul García-Escamilla, E. Villar-Luna, B. Cruz-Lagunas

{"title":"Frequency of fungi associated with Creole corn seeds under different environmental conditions in Guerrero, Mexico","authors":"Guadalupe García-Solano, F. Palemón-Alberto, S. Á. Ortega-Acosta, A. Damián-Nava, P. Juárez-López, Paul García-Escamilla, E. Villar-Luna, B. Cruz-Lagunas","doi":"10.1590/0100-5405/260498","DOIUrl":"https://doi.org/10.1590/0100-5405/260498","url":null,"abstract":"ABSTRACT In Mexico, Creole corn has presented problems related to seed rot. Therefore, the objective of this study was to determine the frequency of fungi associated with Creole corn seeds. From January to February 2019, 13 Creole corn samples were collected from several localities in Guerrero, Mexico. The samples were processed in PDA culture medium and the frequency of each fungus was estimated based on cultural characteristics and taxonomic keys. Considering symptomatic corn seed samples, Fusarium oxysporum was recorded in eight samples at 97.2%, followed by F. graminearum, isolated from race “Olotillo 1” at 94.4% and from race “Cónico pepitilla” at 58.3%. Phomopsis sp. was isolated at 100% from race “Olotillo 2”. Gibberella moniliformis was isolated from “Elotes Occidental 1” at 83.3%, while the least frequent isolate (19.4%) from “Pepitilla” was Sarocladium strictum, which was recorded in three samples at the low values of 11.1% and 2.8% for races “Arrocillo 2” and “Pepitilla”, respectively; Talaromyces variabilis was found in two samples at 11.1% and 2.8% from “Arrocillo 2” and “Cónico pepitilla”, respectively; Stenocarpella macrospora was isolated at 72.2% from “Pepitilla”. Aspergillus flavus was obtained from “Cónico Pepitilla” at 16.7%, while Setosphaeria turcica and Emericella sp. were less frequently isolated. Considering asymptomatic seeds of race “Cónico pepitilla”, F. oxysporum was isolated at 8.3%, Fusarium acuminatum at 8.3% and Gibberella moniliformis at 41.7%; from asymptomatic seeds of “Olotillo 1” and “Olotillo 2”, Phomopsis sp. was isolated at 50% and Rhizoctonia solani at 50%, respectively. In the present study, the fungi F. oxysporum, Phomopsis sp., G. moniliformis and F. graminearum were most frequently associated with Creole corn seeds.","PeriodicalId":39992,"journal":{"name":"Summa Phytopathologica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48287465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sobrevivência de Pseudomonas marginalis pv. marginalis no solo, agente etiológico da queima bacteriana do alho 边缘假单胞菌pv。土壤中的边缘物&大蒜细菌性灼伤的病原

Summa Phytopathologica Pub Date : 2022-10-01 DOI: 10.1590/0100-5405/224923

L. L. Marcuzzo, Andrei Hang Vanderlinde

引用次数: 0

Is the best resistance strategy against begomoviruses yet to come? A Comprehensive Review 针对begomovirus的最佳抵抗策略是否尚未出现?全面检讨

Summa Phytopathologica Pub Date : 2022-10-01 DOI: 10.1590/0100-5405/265657

Qandeel Ishfaqe, Muhammad Imtiaz Shafiq, Mubashra Raza Ali, M. S. Haider

{"title":"Is the best resistance strategy against begomoviruses yet to come? A Comprehensive Review","authors":"Qandeel Ishfaqe, Muhammad Imtiaz Shafiq, Mubashra Raza Ali, M. S. Haider","doi":"10.1590/0100-5405/265657","DOIUrl":"https://doi.org/10.1590/0100-5405/265657","url":null,"abstract":"ABSTRACT The worldwide spread of Geminiviruses and its vector has been attributed to the high rate of recombination, mutation, presence of alternate hosts, transport of plant material, global human activity along with global trade, new agricultural practices and climate change; therefore, the most severe viral diseases among crops have grown in almost all regions of the world, including cassava viral diseases in Africa, cotton leaf curl disease in Pakistan, and multiple diseases related to tomatoes, legumes and cucurbits in India and all over the world. Begomovirus is the major and largest genus of Geminiviridae which has shown a worldwide increase in its variations and distribution by affecting previously unaffected plants. The increasing population has augmented the demand for a sustainable agriculture boost, but begomoviruses have become a continual threat to the world’s agriculture. Numerous control strategies have been used for the viral invasion of the world as pathogens but begomoviruses continually overcome the control methods, and this has generated a need to end this competition between researchers and begomoviruses. The present review summarizes all strategies used against begomoviruses and provides a comprehensive comparison among all control methods, their drawbacks, and future insights.","PeriodicalId":39992,"journal":{"name":"Summa Phytopathologica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46326135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Sensibilidade in vitro de Sclerotium rolfsii a fungicidas 罗氏菌核对杀菌剂的体外敏感性

Summa Phytopathologica Pub Date : 2022-10-01 DOI: 10.1590/0100-5405/243830

Cristiano Moreira, Roseline da Silva Côelho, F. Graichen

引用次数: 0

Colletotrichum spp. and other fungi associated with anthracnose on Coffea arabica L. in Mérida State, Venezuela 委内瑞拉msamrida州的哥伦比亚咖啡炭疽菌和其他与炭疽病有关的真菌

Summa Phytopathologica Pub Date : 2022-09-01 DOI: 10.1590/0100-5405/245876

Sari Ramon Mohali Castillo, Stephan Miller, J. Stewart

{"title":"Colletotrichum spp. and other fungi associated with anthracnose on Coffea arabica L. in Mérida State, Venezuela","authors":"Sari Ramon Mohali Castillo, Stephan Miller, J. Stewart","doi":"10.1590/0100-5405/245876","DOIUrl":"https://doi.org/10.1590/0100-5405/245876","url":null,"abstract":"ABSTRACT In tropical and subtropical regions worldwide, diseases can be major limiting factors to coffee (Coffea arabica) production, a highly valued crop internationally. Our aim was to identify Colletotrichum spp. and other fungal species associated with Coffee Berry Disease (CBD) and anthracnose on coffee twigs, which can greatly inhibit crop production. Concatenated phylogenetic analyses of ApMat and GS loci were used to identify two Colletotrichum species. Colletotrichum siamense was isolated from symptomatic mature and green berries that were both infested and uninfected with Coffee Berry Borer (CBB) and from twigs displaying anthracnose symptoms. Colletrotrichum alienum was isolated from twigs showing anthracnose symptoms. Along with these two Colletotrichum species, association of Fusarium incarnatum (= Fusarium semitectum) and Fusarium solani was found. Identification of Fusarium species was obtained through combined datasets of partial TEF1 and RPB2. Fusarium isolates came from ripe coffee fruits displaying symptoms of CBD, infested or not with CBB, and coffee twigs. In addition, concatenation of four gene regions (ITS, TEF1, CAL, TUB2) allowed the identification of another fungus, together with isolates from coffee twigs with anthracnose, Diaporthe pseudomangiferae. This is the first report of Colletotrichum siamense and Colletotrichum alienum, along with the fungi Fusarium solani and Diaporthe pseudomangiferae, associated with berry diseases on Coffea arabica in the state of Mérida, Venezuela.","PeriodicalId":39992,"journal":{"name":"Summa Phytopathologica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43215482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effectiveness of fungicide seed treatment in the control of soybean seedling dampingoff caused by Rhizoctonia solani under greenhouse conditions 杀菌剂种子处理对温室条件下大豆幼苗枯核病的防治效果

Summa Phytopathologica Pub Date : 2022-09-01 DOI: 10.1590/0100-5405/266033

A. Goulart

{"title":"Effectiveness of fungicide seed treatment in the control of soybean seedling dampingoff caused by Rhizoctonia solani under greenhouse conditions","authors":"A. Goulart","doi":"10.1590/0100-5405/266033","DOIUrl":"https://doi.org/10.1590/0100-5405/266033","url":null,"abstract":"ABSTRACT The present study was conducted to evaluate the efficacy of fungicide seed treatment in the control of soybean seedling damping-off caused by Rhizoctonia solani under greenhouse conditions. The experiment was carried out in Dourados, Mato Grosso do Sul State, Brazil. Treated and untreated soybean seeds were sown in previously sterilized sand, contained in plastic trays, in equidistant individual wells at 3cm depth. The soybean sowing density was 200 seeds/plastic tray. Inoculation with R. solani was done by homogeneous distribution of the fungal inoculum onto the substrate surface (5.0g/tray). The fungus was grown for 35 days on autoclaved black oat seeds ground to powder with a mill (1mm). Seedling emergence, pre and post-emergence damping-off, injured seedlings and disease index (severity) were evaluated according to McKinney formula. Fungicide seed treatments had a significant effect (P ≤ 0.05) on seedling emergence, pre and post-emergence damping-off, injured seedlings and disease index (severity). The best results were obtained for fludioxonil+metalaxyl-M+thiabendazole and fipronil+pyraclostrobin+thiophanate-methyl, followed by carbendazim+thiram+pencycuron and thiophanate-methyl+fluazinam. The least efficient treatments were carbendazim+thiram, fludioxonil+metalaxyl-M and carboxin+thiram. Pearson correlation analysis indicated that injured seedlings and disease index were positively correlated (R=0.92). This means that the greater the number of injured seedlings, the greater the disease index and the less efficient the fungicide. The fungicides used in the present study did not have any phytotoxic effect on soybean seedlings.","PeriodicalId":39992,"journal":{"name":"Summa Phytopathologica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48790815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validação de um sistema de previsão para a cercosporiose da beterraba 甜菜黑斑病预测系统的验证

Summa Phytopathologica Pub Date : 2022-09-01 DOI: 10.1590/0100-5405/247029

L. L. Marcuzzo

{"title":"Validação de um sistema de previsão para a cercosporiose da beterraba","authors":"L. L. Marcuzzo","doi":"10.1590/0100-5405/247029","DOIUrl":"https://doi.org/10.1590/0100-5405/247029","url":null,"abstract":"RESUMO Com o objetivo de validar um sistema de previsão, com diferentes níveis de valores de severidade estimada comparada à pulverização convencional no controle da cercosporiose da beterraba, foram conduzidos experimentos em Rio do Sul/SC durante os ciclos de cultivo de 2018, 2019 e 2020. Os programas de pulverização foram estabelecidos de acordo com valores de severidade estimada (SE) do sistema de Marcuzzo et al., atribuindo-se valores acumulados de 0,15; 0,25, e 0,35 SE e no sistema convencional com pulverizações a cada 5 e 7 dias. Não houve diferença significativa entre os tratamentos quanto à produtividade em todos os ciclos. A AACPD, a severidade final e a taxa de progresso da doença não diferiram entre os tratamentos, mas no sistema de previsão com SE=0,35 o número de pulverizações foi de 28; 57 e 67% menor em relação ao sistema de aplicação semanal nos três anos de avaliação. O uso do sistema de previsão mostrou ser uma ferramenta viável no manejo do da cercosporiose da beterraba em Santa Catarina e encontra-se disponível gratuitamente para uso da cadeia produtiva na plataforma Agroconnect da EPAGRI-CIRAM disponível em http://www.ciram.sc.gov.br/agroconnect/.","PeriodicalId":39992,"journal":{"name":"Summa Phytopathologica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47246096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Occurrence of seed decay caused by Diaporthe longicolla on soybean in Colombia 哥伦比亚大豆长叶双孢菌引起的种子腐烂现象

Summa Phytopathologica Pub Date : 2022-09-01 DOI: 10.1590/0100-5405/264271

N. López-Cardona, A. Guevara-Castro, Marcela López-Casallas, Lederson Gañán-Betancur

引用次数: 0

Resistance of cacao tree to witches’ broom disease – A study of inheritance 可可树对丛枝病的抗性遗传研究

Summa Phytopathologica Pub Date : 2022-09-01 DOI: 10.1590/0100-5405/260846

J. L. Pires, E. Luz, Gilson Soares de Melo

引用次数: 0