Canadian Journal of Plant Pathology最新文献_第7页

In memoriam / En mémoire: Stephen Reynolds February 17 1993 – September 21 2022 纪念:斯蒂芬·雷诺兹1993年2月17日- 2022年9月21日

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-06 DOI: 10.1080/07060661.2023.2195297

引用次数: 0

Western redcedar — natural history and pathosystems, with emphasis on cedar leaf blight 西部红杉-自然历史和病理系统，重点是雪松叶枯病

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-03 DOI: 10.1080/07060661.2023.2198489

J. A. Aldana, H. Kope, B. Hawkins

{"title":"Western redcedar — natural history and pathosystems, with emphasis on cedar leaf blight","authors":"J. A. Aldana, H. Kope, B. Hawkins","doi":"10.1080/07060661.2023.2198489","DOIUrl":"https://doi.org/10.1080/07060661.2023.2198489","url":null,"abstract":"Abstract The wood properties of western redcedar (Thuja plicata) (WRC) are revered in traditional practices by Pacific Coast First Nations and valued for speciality commercial purposes. In the near future, WRC harvesting will shift to second growth from old-growth, however, its cultural significance will persist, and the superior physical and chemical properties of the wood mean that it will remain in high demand. Investigating and understanding the adaptations of the species to environmental and pathogen stress in the face of changing climates can assure a sustainable supply of WRC. Of the pathogens affecting WRC, cedar leaf blight (Didymascella thujina) (CLB) is the most severe. This foliar disease infects the leaflets of seedlings and mature trees, causing a loss of photosynthetic area resulting in decreased growth or mortality. The disease is more severe on nursery seedlings than mature trees. Future projected climates in WRC’s native range are expected to increase the prevalence of, and damage from CLB. This review summarizes the state of knowledge and emphasizes recent advances in the understanding of the Thuja – Didymascella pathosystem.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"377 - 390"},"PeriodicalIF":2.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47705719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Colletotrichum brevisporum causing anthracnose of papaya (Carica papaya L.) in Mexico 墨西哥引起木瓜炭疽病的短孢炭疽菌

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-03-29 DOI: 10.1080/07060661.2023.2195825

Mary Carmen Pacheco-Esteva, Delia Soto‐Castro, A. Vásquez-López, J. M. Tovar‐Pedraza

{"title":"Colletotrichum brevisporum causing anthracnose of papaya (Carica papaya L.) in Mexico","authors":"Mary Carmen Pacheco-Esteva, Delia Soto‐Castro, A. Vásquez-López, J. M. Tovar‐Pedraza","doi":"10.1080/07060661.2023.2195825","DOIUrl":"https://doi.org/10.1080/07060661.2023.2195825","url":null,"abstract":"Abstract Papaya fruit cv. Maradol showing typical symptoms of anthracnose were observed in a commercial orchard located in the municipality of Pinotepa Nacional at the coastal region of Oaxaca, Mexico in September 2020. The incidence rate of anthracnose reached 60%. The symptoms consisted of sunken, water-soaked lesions with salmon-coloured conidia masses on the surface of papaya fruit. The aim of this study was to identify the causal agent of papaya anthracnose based on the phylogenetic analysis of four concatenated datasets. The isolate exhibited sparse white to greyish aerial mycelium and clearly shaped concentric rings with exudate of orange conidia on potato dextrose agar. The fungus was identified as Colletotrichum brevisporum using sequence data of the internal transcribed spacer (ITS) region, and part of the actin (act), glyceraldehyde-3-phosphate dehydrogenase (gapdh), and chitin synthase (chs-1) genes. The fungus isolated from diseased fruit produced lesions on wounded fruit and unwounded fruit. The pathogen was re-isolated from lesions on inoculated fruit to fulfill Koch’s postulates. To our knowledge, this is the first report of C. brevisporum causing anthracnose disease on papaya fruit in Mexico.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"360 - 366"},"PeriodicalIF":2.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41373672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficacy of fumigants and biofumigants for the control of replant disease of American ginseng (Panax quinquefolius) 熏蒸剂和生物熏蒸剂防治西洋参再植病的效果研究

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-03-28 DOI: 10.1080/07060661.2023.2196518

S. Westerveld, R. Riddle, F. Shi

{"title":"Efficacy of fumigants and biofumigants for the control of replant disease of American ginseng (Panax quinquefolius)","authors":"S. Westerveld, R. Riddle, F. Shi","doi":"10.1080/07060661.2023.2196518","DOIUrl":"https://doi.org/10.1080/07060661.2023.2196518","url":null,"abstract":"Abstract Ginseng replant disease (GRD) prevents the successful production of a second ginseng crop on the same ground even decades after the first crop. A study was initiated in 2013 to compare the efficacy of fumigants and biofumigants at two sites: (1) a replant garden planted to ginseng one year after a crop had been harvested, and (2) a non-replant site in which ginseng had never been grown. Treatments included chloropicrin and metam-sodium fumigants covered in totally impermeable film (TIF), un-tarped metam-sodium, modified mustard seed meal (MSM), and a mustard-capsaicin product (MC), and both a tarped and un-tarped control. Treatments were applied in June and July 2013 and ginseng seeded in August 2013. Plant stand was assessed monthly throughout the trial beginning after germination in spring 2014, and yield and quality were assessed at harvest in 2016 (replant site) and 2017 (non-replant site). At the replant site, plant stand declined rapidly in the un-tarped control, MSM, and MC treatments in the seedling year with no roots surviving to harvest. Although all plots had some disease at harvest, chloropicrin, metam-sodium, and the tarped control significantly improved yield. Disease pressures were low at the non-replant site and there were no consistent differences among treatments. Using Koch’s postulates, the cause of the rot in the replanted plot was confirmed to be Ilyonectria mors-panacis, although other factors are likely involved in the disease. Plant parasitic nematodes were not present in the replant site suggesting they may not be important factors in replant disease severity.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"405 - 419"},"PeriodicalIF":2.0,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41924326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Colonization and confrontation of four Armillaria sinapina isolates to Armillaria ostoyae within inoculated wood blocks and stumps 接种木块和树桩内4株sinapina蜜环菌对蜜环菌的定殖和对抗

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-03-15 DOI: 10.1080/07060661.2023.2190165

M. Cruickshank

{"title":"Colonization and confrontation of four Armillaria sinapina isolates to Armillaria ostoyae within inoculated wood blocks and stumps","authors":"M. Cruickshank","doi":"10.1080/07060661.2023.2190165","DOIUrl":"https://doi.org/10.1080/07060661.2023.2190165","url":null,"abstract":"Abstract Roots represent a third of terrestrial biomass. After logging, fungal pathogens use stump roots as a food base to survive and this may result in negative impact on aboveground plant production. Mycelial spread determines the fungal volume in the stump, which in turn dictates inoculum potential and spread distance; hence, it is a key disease factor. The current study focuses on the spread and confrontation of two sympatric species of Armillaria with differing virulence. Living cut blocks of Douglas-fir stem were inoculated at opposite ends with a virulent Armillaria ostoyae isolate, or four A. sinapina isolates with low virulence from two biogeoclimatic zones. The inoculum blocks were buried in moist sand, and then the surface area and volume occupied by each was determined. The drier zone A. sinapina isolates colonized 80% of the block surface areas, while the moister zone isolates were about equal with A. ostoyae (42% colonized). Additionally, inoculum blocks of each species were buried against a root and root collar of two living trees, the trees were cut, and the stumps became colonized. One stump had greater A. ostoyae colonization over A. sinapina by 12%, and the other larger stump by 74% because of thicker root collar bark that hindered A. sinapina. All interspecific encounters produced a stalemate. Increased growth potential of A. sinapina in drier zones might enable root colonization before drying. Southern Canada is forecast to become drier and warmer, favouring A. ostoyae over A. sinapina in the currently more productive areas, with an increasing negative impact on aboveground productivity.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"290 - 299"},"PeriodicalIF":2.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42558127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genome exploration and ecological competence are key to developing effective Pseudomonas-based biocontrol inoculants 基因组探索和生态能力是开发有效的假单胞菌生物防治接种剂的关键

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-02-27 DOI: 10.1080/07060661.2023.2185291

A. Zboralski, A. Biessy, M. Filion

{"title":"Genome exploration and ecological competence are key to developing effective Pseudomonas-based biocontrol inoculants","authors":"A. Zboralski, A. Biessy, M. Filion","doi":"10.1080/07060661.2023.2185291","DOIUrl":"https://doi.org/10.1080/07060661.2023.2185291","url":null,"abstract":"Abstract Numerous plant-beneficial Pseudomonas strains have been isolated and characterized for their ability to control plant pathogens and the diseases they cause under controlled conditions. Only a few have, however, demonstrated consistent field efficacy. Better exploitation of genomic information and consideration of the ecological competence of strains of interest could help overcome this major inconsistency. In this minireview, we will discuss these two important aspects that we consider crucial in the development of effective Pseudomonas biocontrol inoculants. We will first explore how the increasing availability of genomic data can empower researchers who study Pseudomonas-mediated biocontrol to better understand the mechanisms at play. We will then discuss the key roles played by ecological competence in the successful development of Pseudomonas-based biocontrol inoculants and how researchers can better select ecologically competent strains. A better understanding of these factors could help accelerate the development of effective Pseudomonas inoculants and prevent wasting precious time and resources performing field experiments with strains that have little chance to succeed.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"330 - 339"},"PeriodicalIF":2.0,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47460808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Diversity in virulence and metalaxyl-m sensitivity of Phytophthora rubi isolates has implications for raspberry root rot and wilting complex management 红疫霉分离株毒力和甲霜灵-m敏感性的多样性对树莓根腐病和萎蔫复合物的管理具有启示意义

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-02-23 DOI: 10.1080/07060661.2023.2175912

Sanjib Sapkota, R. Burlakoti, Z. Punja

{"title":"Diversity in virulence and metalaxyl-m sensitivity of Phytophthora rubi isolates has implications for raspberry root rot and wilting complex management","authors":"Sanjib Sapkota, R. Burlakoti, Z. Punja","doi":"10.1080/07060661.2023.2175912","DOIUrl":"https://doi.org/10.1080/07060661.2023.2175912","url":null,"abstract":"Abstract Raspberry root rot and wilting complex (RRWC), primarily caused by Phytophthora rubi, is the most important disease for raspberry producers in Canada. There is currently little to no information on phenotypic diversity or sensitivity to metalaxyl-m of P. rubi isolates affecting raspberries in Canada. This study was conducted to understand the diversity in virulence and sensitivity to metalaxyl-m of P. rubi populations collected from diverse raspberry cultivars, fields, and locations during 2018–2020. All isolates of P. rubi (n = 24) were pathogenic on ‘Chemainus’ raspberry and showed significant variation (P < 0.05) in days to first foliar symptom development (DFSD) and progress in wilting index, as indicated by relative areas under disease progress curves (rAUDPC). Principal component analyses identified that root rot index, rAUDPC, DFSD, and percentage reduction in root length and weight were important variables in assessing pathogen virulence. Metalaxyl-m sensitivity was assessed using a radial growth assay and effective concentrations that inhibited 50% of mycelial growth (EC50) were determined for 44 isolates. The EC50 values ranged from 0.035–4.71 µg mL−1 with a mean value of 0.793 µg mL−1. About 61% of the isolates were very sensitive (EC50 values <0.20 µg mL−1), 25% of isolates were considered sensitive (EC50 values of 0.21–1.18 µg mL−1), and 14% of isolates showed reduced sensitivity to metalaxyl-m (EC50 value range of 1.19–4.71 µg mL−1). Knowledge of pathogen phenotypic diversity will be useful for raspberry breeders in screening genotypes against RRWC and the results of the fungicide sensitivity study will be useful in developing management strategies for RRWC.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"263 - 276"},"PeriodicalIF":2.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44546269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

First report of Colletotrichum spaethianum causing anthracnose disease on Bletilla striata 炭疽杆菌引起白藜芦炭疽病初报

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-02-21 DOI: 10.1080/07060661.2023.2181871

Yu Liu, S. Liang, Qiuyu Yao, Haixia Ding, Zhong Li

{"title":"First report of Colletotrichum spaethianum causing anthracnose disease on Bletilla striata","authors":"Yu Liu, S. Liang, Qiuyu Yao, Haixia Ding, Zhong Li","doi":"10.1080/07060661.2023.2181871","DOIUrl":"https://doi.org/10.1080/07060661.2023.2181871","url":null,"abstract":"Abstract Bletilla striata is a traditional Chinese medicine plant. Guizhou Province is the largest producer of B. striata, with the biggest cultivation area and highest yield in China. Anthracnose is the main disease affecting the crop. In July 2021, an anthracnose outbreak occurred in Shibing County, Guizhou Province, seriously affecting the yield and quality of B. striata. Thirty samples of B. striata anthracnose were collected from Shuangjing, Niudachang, and Yangliutang towns in three main planting areas of Shibing County to clarify the causal agent of B. striata anthracnose. Fifty anthracnose strains were isolated by tissue isolation and single-conidium culture. Through morphological observation and multigene phylogenetic analysis of the internal transcribed spacer, actin, beta-tubulin, glyceraldehyde-3-phosphate dehydrogenase and chitin synthase genes, the isolated strains were identified as Colletotrichum spaethianum. The infection process of C. spaethianum on B. striata leaves was observed by cell tissue staining. The results showed that at 25°C, the conidia of C. spaethianum on B. striata leaves began to germinate after 3 h, and the peak period of conidia germination was 8 h. Appressoria formation peaked after 24 h. During 48–72 h, the hyphae randomly expanded horizontally and vertically on the host surface, gradually forming a reticular distribution. This study is the first report of C. spaethianum causing anthracnose in B. striata. Our study clarifies the infection and development process of C. spaethianum on B. striata leaves, thus providing a theoretical basis for further study on the monitoring of B. striata anthracnose.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"253 - 262"},"PeriodicalIF":2.0,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48161093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fungi Canadenses No. 351:EPICHLOE ELYMI 加拿大真菌351号：EPICHLOE ELYMI

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-02-21 DOI: 10.1080/07060661.2023.2183264

Miao Liu

引用次数: 0

A status update on fusarium head blight on Western Canadian wheat 加拿大西部小麦赤霉病的最新进展

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-02-13 DOI: 10.1080/07060661.2023.2177352

Tiffany Chin, K. Pleskach, S. Tittlemier, M. Henríquez, Janice M. Bamforth, Niradha Withana Gamage, Tehreem Ashfaq, Sung-Jong Lee, Mayantha Shimosh Kurera, Bhaktiben Patel, S. Walkowiak

{"title":"A status update on fusarium head blight on Western Canadian wheat","authors":"Tiffany Chin, K. Pleskach, S. Tittlemier, M. Henríquez, Janice M. Bamforth, Niradha Withana Gamage, Tehreem Ashfaq, Sung-Jong Lee, Mayantha Shimosh Kurera, Bhaktiben Patel, S. Walkowiak","doi":"10.1080/07060661.2023.2177352","DOIUrl":"https://doi.org/10.1080/07060661.2023.2177352","url":null,"abstract":"Abstract Fusarium head blight (FHB) is a devastating disease of wheat in Canada and disease surveillance is a critical component of integrated disease management, disease forecasting, prioritizing research and breeding efforts, grain handling, and cleaning post harvest. We report on the recent trends of FHB in Canadian wheat including incidence and severity from 1995 to 2021 based on data from 208,247 samples. Our results show a steady increase in FHB incidence from 1995, with an epidemic year in 2016, followed by several years of low incidence. Results also indicated that FHB severity has been stable over time, but not always correlated with incidence. Data from the analysis of 26,538 samples from 2018 to 2021 demonstrate a strong positive correlation between the number of Fusarium damaged kernels (severity) and concentrations of the mycotoxin deoxynivalenol. Together, our results provide the most robust survey of FHB in Canada to date, which complement national and international disease monitoring and management efforts.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"277 - 289"},"PeriodicalIF":2.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47197897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0