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Occurrence and identification of two Nothophoma species causing branch canker and leaf brown spot of walnut in China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-03-11 Cuiwen Zhang, Chengde Yang, Fengfeng Cai, Ting Ma, Lijuan Wei, Mengjun Jin, Yidan Wang, Na Qi
In June 2020, branch canker and brown spot of leaves on walnut were observed in Qingyang, China. A total of five strains were isolated from symptomatic samples and verified for pathogenicity based ...
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Characterization of Athelia rolfsii associated with southern blight of pointed gourd (Trichosanthes dioica) in India Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-03-04 Sangeetha Ganesan, Priti Sonavane, Deepika Devadarshini, Ayushman Gadnayak, Supriya Sahu, Srinivas Petikam, Gobinda Ch Acharya
Pointed gourd (Trichosanthes dioica Roxb) is a perennial cucurbitaceous vegetable popular in the eastern and northern parts of India. In July 2018, an occurrence of southern blight disease was obse...
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Prevalence of mycotoxins from silage in a small beef cattle feedlot over a storage season: a case study Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-02-29 Katherine R. Teeter-Wood, Megan J. Kelman, David P. Teeter, Mark W. Sumarah
Challenges exist worldwide for the storage of animal feed, though year-long feeding of livestock is especially difficult in northern climates, including Canada. Usage of silage allows for crops to ...
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Diversity and potential sources of introduction of the beech leaf nematode (Litylenchus crenatae mccannii) to Ontario, Canada Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-02-27 Katrin N. E. Fitza, Jeremy Allison, Bernard Slippers, Nomatter Chingandu, Sharon E. Reed
Litylenchus crenatae mccannii is a foliar nematode that causes severe damage to beech, known as beech leaf disease (BLD). Previous studies have characterized and identified L. crenataein Japan and ...
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Application of molecular methods for potato disease diagnosis: a review Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-02-27 Junye Jiang, Will Feindel, Michael Harding, David Feindel, Stacey Bajema, Jie Feng
Potato is a vital crop worldwide and its production is threatened by diseases caused by viruses, bacteria, fungi and other forms of microorganisms. Early detection and identification of these patho...
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Antagonistic potential of forestry compost bacteria on Sclerotinia sclerotiorum (Lib.) de Bary, causal agent of carrot white mould Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-02-23 Stéphanie Meyer, Zina Barghouth, Caitlin Kehoe, David R. Mcmullin, Tyler J. Avis
Composts are known to contain beneficial bacteria, which may be antagonistic to plant pathogens. This work evaluated whether carrot white mould, causal agent Sclerotinia sclerotiorum, can be reduce...
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Comparing tar spot epidemics in high-risk areas in the United States and Honduras Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-02-01 Carlos C. Gongora-Canul, Carlos Puerto, Fidel E Jiménez-Beitia, Darcy E. P. Telenko, Nathan Kleczewski, Juan Carlos Rosas, Carolina Avellaneda, Arie Sanders, Iveth Y. Rodriguez, Stephen B. Goodwin, Lenin E. Henriquez-Dole, Mariela Fernandez-Campos, Da-Young Lee, Andres P. Cruz, C. D. Cruz
Tar spot of corn is a disease that causes significant production losses in the Americas. However, the dynamics of tar spot epidemics in different countries is currently unknown. We assessed the tem...
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Comparative proteomic analysis of the moderately resistant and susceptible peanut cultivars during infestation by Cylindrocladium parasiticum Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Xinyu Chen, Mei Luo, Meimei Xiang, Lina Xiong, Yongxin Shu, Guohui Yu, Zhangyong Dong, Yunhao Sun
Cylindrocladium parasiticum Crous, Wingfield & Alfenas, the causal agent of Cylindrocladium black rot of peanut, has led to economic losses in China. However, the response of peanut plant to C. par...
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Differential occurrence and strain composition of potato viruses between two major seed potato production zones in China suggest the need for different management strategies for the zones Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Yanling Gao, Guoquan Fan, Shengqun Cheng, Wei Zhang, Yu Shen, Shu Zhang, Cailing Qiu, Xianzhou Nie, Yanju Bai, Wenhe Lu
Viral disease is one of the major reasons leading to yield and quality reduction of potato production. To gain better knowledge about seed potato quality in China, the occurrences of six common vir...
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First report of Puccinia gibberosa on blue oatgrass (Helictotrichon sempervirens) in Canada, with taxonomic revision of the rust species Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Mehrdad Abbasi, Sarah Hambleton, Miao Liu, Scott A. Redhead, Gurcharn Singh Brar
Helictotrichon sempervirens (blue oatgrass) is a perennial grass widely grown for ornamental use in Canada. Rusted blue oatgrass plants with diseased leaves covered with uredinia were collected fro...
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Inheritance of Fusarium wilt resistance in flax Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Priyangi Edirisinghe, Lipu Wang, Lester Young, Helen Booker, Khalid Rashid, Hadley Kutcher
Fusarium wilt (FW) caused by the facultative fungal saprophyte Fusarium oxysporum f. sp. lini (Fol) is a major disease affecting flax production. Cultivation of FW-resistant cultivars mitigates eff...
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First report of Melampsora ferrinii (Pucciniales) on Babylon willow (Salix babylonica) in Iran Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Mehrdad Abbasi, Gurcharn Singh Brar, M. Catherine Aime
As an agroforestry resource willow species (Salix spp.) becoming increasingly important in the protection of riverbanks, recovery of floodable lands, soil bioremediation, biomass production, and wi...
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Microbial consortia as an option for biocontrol of Stromatinia cepivora Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Christian David Vargas Baquero, Alba Marina Cotes
Stromatinia cepivora, the causal agent of white rot, is responsible for 60–80% of economic losses in onion and garlic crops. This work aimed to select biological control agents (BCAs) to control wh...
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Biosurveillance of oak wilt disease in Canadian areas at risk Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-26 Marie-Krystel Gauthier, Émilie Bourgault, Amélie Potvin, Guillaume J. Bilodeau, Sven Gustavsson, Sharon Reed, Pierre Therrien, Évelyne Barrette, Philippe Tanguay
Biosurveillance of invasive species is critical for protecting native ecosystems and limiting economic losses. Early detection of pathogens through qPCR methods has recently shown great promise and...
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Diversity and pathogenicity of anastomosis groups of Rhizoctonia associated with brassicas in Brazil Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-19 Gaziele S. Lima, Kledson M. Santos, Ana P. O. Barros, Ailton Reis, Alexandre R. Machado, Cristina M. Souza-Motta, Juan M. Tovar-Pedraza, Kamila C. Correia, Sami J. Michereff
Seventy-eight Rhizoctonia isolates were obtained from brassicas in five Brazilian states between 2015 and 2017. The isolates were identified by phylogenetic analysis of the rDNA internal transcribe...
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First report of post-harvest fruit rot on watermelon caused by Lasiodiplodia theobromae in Northern Thailand Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-19 Surapong Khuna, Jaturong Kumla, Nakarin Suwannarach
Fruit rot is one of the most important diseases affecting watermelon (Citrullus lanatus). This disease has been associated with substantial economic losses. In May 2022, fruit rot on watermelons wa...
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Southwestern Ontario Regional Meeting, 2023 / Réunion régionale du-oust de l’Ontario, 2023 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2024-01-18
Published in Canadian Journal of Plant Pathology (Ahead of Print, 2024)
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Effectiveness of solitary and combined use of cover crop species to manage soilborne diseases in woody ornamental nursery production system Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-21 Madhav Parajuli, Milan Panth, Anthony Witcher, Fulya Baysal-Gurel
The understanding of how solitary and combined use of covercrop species and seeding rates influences soilborne diseases is lacking. Cover crops (crimson clover, triticale and crimson clover + triti...
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The occurrence of cyst nematodes in agricultural fields of Southern Manitoba Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-19 Mehrdad Madani, Mario Tenuta, Pablo Castillo
In southern Manitoba, Canada, a survey was carried out in 2012 and 2013 to determine the presence of Heteroderidae cyst-forming plant-parasitic nematodes, with a focus on the soybean cyst nematode ...
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Species diversity of Fusarium head blight and deoxynivalenol (DON) levels in Western Canadian wheat fields Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-19 S. K. Kannangara, P. Bullock, S. Walkowiak, W. G. D. Fernando
Fusarium head blight (FHB) is primarily caused by Fusarium graminearum and is the most destructive wheat disease in western Canada. The trichothecene toxin deoxynivalenol (DON) and its derivatives ...
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Identification of fungal pathogens causing fruit tree dieback in British Columbia Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-18 José Ramón Úrbez-Torres, Julie Boulé, Melanie Walker, Jared Hrycan, Daniel T. O’Gorman
Field surveys were conducted in British Columbia fruit tree growing regions to determine the incidence of dieback and to identify the main fungal species causing cankers. Fruit trees showing canker...
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Artificial intelligence analysis of contributive factors in determining blackleg disease severity in canola farmlands Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-15 Liang Zhao, Michael W. Harding, Gary Peng, Ralph Lange, Sean Walkowiak, W. G. Dilantha Fernando
Canola (Brassica napus L.) production is threatened by blackleg disease caused by Leptosphaeria maculans. Disease outcome is determined by interactions among pathogens, plants, farming practices, a...
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Metabarcoding for plant pathologists Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-15 Martha A. Sudermann, Zachary S. L. Foster, Jeff H. Chang, Niklaus J. Grünwald
Metabarcoding is a method that uses high-throughput sequencing to characterize microbial communities. This approach involves PCR-based amplification of a single locus from environmental DNA of comm...
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Some soilborne pathogens causing root rot and wilting of pistachio trees in southeastern Turkey Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-07 Mehmet Hadi Aydin, Sirel Canpolat, Tuba Uzun
Soilborne fungal pathogens that cause root rot, wilting and dying are the most important problems in pistachio production. The purpose of this study was to examine, isolate, and diagnose the pathog...
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First report of yeast spot caused by Eremothecium coryli on soybean in South Korea Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-12-06 Okhee Choi, Haeun Noh, Yongsung Kang, Hyun Jin Chun, Min Chul Kim, Jinwoo Kim
An ascomycete yeast was isolated from tissue cultures of soybean explants (cv. Williams 82) exhibiting blanching and discoloration. Stink bug damage was confirmed in soybean seeds that were grown a...
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Symptomology, prevalence, and impact of Hop latent viroid on greenhouse-grown cannabis (Cannabis sativa L.) plants in Canada Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-11-27 Zamir K. Punja, Keri Wang, Samantha Lung, Liam Buirs
The incidence of Hop latent viroid (HLVd) affecting cannabis plants in licenced production facilities in Canada during 2020–2023 was determined by RT-PCR analyses of 15 947 samples from nine provin...
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Onion leaf blight caused by Alternaria alternata sensu lato and Stemphylium vesicarium in Michoacán, México Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-11-22 Alfredo Reyes-Tena, Amelia Cristina Montoya-Martínez, Sylvia Patricia Fernández-Pavía, Ricardo Santillán-Mendoza, Adanely Jiménez-Villegas, Daniela Pineda-Vaca, Gerardo Rodríguez-Alvarado
México is among the main producers of onions, which are cultivated mainly in the states of Baja California, Chihuahua, Guanajuato, Michoacán, and Zacatecas. During June and November 2017, foliar bl...
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Erysiphe thuemenii causing powdery mildew on Potentilla indica in China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-09-04 Qinen He, Luchao Bai, Fang Cai
In August 2017, severe powdery mildew was observed on Potentilla indica in Minhe, Qinghai province, China. The identification of fungal species was performed by morphological study using an optical...
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Canadian Plant Disease Survey 2023 Volume 103: Disease Highlights 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-08-23 Janice Elmhirst
Published in Canadian Journal of Plant Pathology (Vol. 45, No. sup1, 2023)
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Crown gall development on cannabis (Cannabis sativa L., marijuana) plants caused by Agrobacterium tumefaciens species-complex Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-06-26 J. E. Holmes, H. Sanghera, Zamir K. Punja
Crown gall, caused by Agrobacterium tumefaciens (syn. Rhizobium radiobacter), is characterized by gall formation on crowns, stems or roots on many plant species. We describe the occurrence of this ...
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Exploring Iranian wheat landraces for stripe rust resistance genes and validation of selected genes using molecular markers Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-06-14 Mahboobeh Yazdani, Mohsen Yassaie, Saeed Rezaee, Abodol Karim Zakeri, Mehran Patpour
Puccinia striiformis Westend. f. sp. tritici Eriksson (Pst), the causal agent of stripe rust, is known as an important and destructive pathogen that causes critical wheat losses in many parts of th...
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Applications of genome editing in plant virus disease management: CRISPR/Cas9 plays a central role Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-31 Farhana Wani, Shahjahan Rashid, Sumiah Wani, Sahar Saleem Bhat, Sanober Bhat, Ebru Derelli Tufekci, Ayman El Sabagh, Shabir Hussain Wani, Aflaq Hamid
Plant viruses infect a wide variety of economically important crop plants and cause significant loss in agricultural production around the world. Conventional control strategies are insufficient to...
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Characterization of Plasmodiophora brassicae pathotypes from western Canada in 2019–2020 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-26 Keisha B. Hollman, Victor P. Manolii, Yoann Aigu, Michael W. Harding, Sheau-Fang Hwang, Stephen E. Strelkov
Clubroot, caused by Plasmodiophora brassicae, is a major soilborne disease of canola (Brassica napus) on the Canadian Prairies. Most canola cultivars carry what is now referred to as ‘first-generat...
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Occurrence of Erysiphe friesii var. dahurica on purple buckthorn (Rhamnus purpurea) from Pakistan Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-24 Najam-Ul-Sehar Afshan, Saliha Afzal, Maria Riaz, Arooma Saleem, Abdul Rehman Niazi, Abdul Nasir Khalid
Leaves of purple buckthorn observed with powdery mildew symptoms were collected from the district Abbottabad, Khyber-Pakhtunkhwa, Pakistan during field tours from August to October between 2017 and...
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Ampelomyces mycoparasites of powdery mildews – a review Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-18 Rosa E. Prahl, Shahjahan Khan, Ravinesh C. Deo
Abstract This review paper highlights the significant research conducted on fungi belonging to the genus Ampelomyces. Phylogeny based on both ITS and actin sequences has grouped Ampelomyces into different lineages. However, the ITS2 spacer, one constituent of the ITS region, together with their secondary structures (S2s), showed that these lineages are represented by different S2s; also, evidence of
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Annual meeting, the Canadian phytopathological society, 2022/Réunion annuelle, la société canadienne de phytopathologie, 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-10
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 3, 2023)
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Isolation, identification, and host range of Aspergillus welwitschiae causing postharvest rot on Chinese cabbage in China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-05-10 Jiaxi Li, An Zhang, Yan Liu, Yaowei Zhang, Ran Gu
Abstract A new kind of postharvest rot on Chinese cabbage (Brassica rapa L. ssp. pekinensis) caused by a fungus was observed in vegetable cellars in Harbin, China in 2019 and 2020, causing considerable economic losses. A water-soaked spot appeared at the base of the midrib of leaves, extended into the upper part of the midrib, and ultimately turned into rot. The diseased part was dark brown or black
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Western redcedar — natural history and pathosystems, with emphasis on cedar leaf blight Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-26 Juan A. Aldana, Harry H. Kope, Barbara J. Hawkins
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
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In memoriam / En mémoire: Dr. Susan M. Boyetchko January 4, 1959–February 8, 2023 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-25 Linda Jewell
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 5-6, 2023)
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Southwestern Ontario regional meeting, 2022 / Réunion régionale du-oust de l’Ontario, 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-25
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 5-6, 2023)
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Efficacy of fumigants and biofumigants for the control of replant disease of American ginseng (Panax quinquefolius) Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-21 Sean M. Westerveld, Rachel N. Riddle, Fang Shi
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
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Colletotrichum brevisporum causing anthracnose of papaya (Carica papaya L.) in Mexico Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-14 Mary Carmen Pacheco-Esteva, Delia Soto- Castro, Alfonso Vásquez- López, Juan Manuel Tovar-Pedraza
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
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New records of parasitic fungi on Cassia fistula and Leucaena leucocephala (Fabaceae) in Colombia Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-12 Samir Galvis-López, Mauricio Salazar-Yepes, Juan Morales-Osorio
Abstract In the arboretum of Universidad Nacional de Colombia sede Medellín, Cassia fistula (Golden Shower Tree) and Leucaena leucocephala (Leucaena) exhibited early defoliation. Erysiphe quercicola and Telimena canafistulae, associated with powdery mildew and tar spot, respectively, on C. fistula, were identified using morphological and molecular techniques, both representing new records of fungi
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In memoriam / En mémoire: Stephen Reynolds February 17 1993 – September 21 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-06
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 3, 2023)
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Alberta regional meeting, 2022 / Réunion régionale de l’Alberta, 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-05
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 3, 2023)
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Saskatchewan regional meeting, 2022 / Réunion régionale de la Saskatchewan, 2022 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-05
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 3, 2023)
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Colonization and confrontation of four Armillaria sinapina isolates to Armillaria ostoyae within inoculated wood blocks and stumps Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-04-05 Mike Cruickshank
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
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Fungi Canadenses No. 351:EPICHLOE ELYMI Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-24 Miao Liu
Published in Canadian Journal of Plant Pathology (Vol. 45, No. 3, 2023)
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First report of Colletotrichum spaethianum causing anthracnose disease on Bletilla striata Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-17 Yu Liu, Shang Liang, Qiuyu Yao, Haixia Ding, Zhong Li
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
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Genome exploration and ecological competence are key to developing effective Pseudomonas-based biocontrol inoculants Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-10 Antoine Zboralski, Adrien Biessy, Martin Filion
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
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Diversity in virulence and metalaxyl-m sensitivity of Phytophthora rubi isolates has implications for raspberry root rot and wilting complex management Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-10 Sanjib Sapkota, Rishi R. Burlakoti, Zamir K. Punja
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
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Inoculum threshold for stripe rust infection in wheat Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-09 Gabriela T. Araujo, Denis A. Gaudet, Eric Amundsen, Michele Frick, Reem Aboukhaddour, Brent L. Selinger, André Laroche
Abstract Stripe rust (Puccinia striiformis f. sp. tritici (Pst)) and powdery mildew (Blumeria graminis f. sp. tritici (Bgt)) are important diseases of wheat in Canada and worldwide. Molecular detection methods permit spore detection of few spores; therefore, there is a need to determine initial inoculum thresholds for pathogens to cause disease under both controlled environments and in the field. Susceptible
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Systemically induced resistance against disease of wheat caused by Fusarium graminearum Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-09 Abdurraouf Abaya, Allen Xue, Tom Hsiang
Abstract The endophytic fungi Simplicillium lamellicola and Clonostachys rosea were assayed for their ability to induce resistance in wheat against disease caused by Fusarium graminearum Schwabe in growth room and outdoor tests. Agar inoculum of the endophytes was applied 4 days before agar inoculum of F. graminearum was applied to adjacent leaves. Simplicillium lamellicola or C. rosea treatments applied
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Combined effects of Ascophyllum nodosum seaweed extract and biological control agents on Meloidogyne javanica in soybean Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-03-03 Luanna Karoline Rinaldi, Monique Thiara Rodrigues E Silva, Angélica Miamoto, Angélica Calandrelli, Cláudia Regina Dias-Arieira
Abstract This study aimed to investigate the efficacy of Ascophyllum nodosum extract, in combination or not with biocontrol agents, in the management of Meloidogyne javanica in soybean, assess treatment effects on soil biological activity, and determine the total phenolic content of the extract. The experiment was conducted according to a 5 × 2 factorial design, with three biocontrol agents (Bacillus
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A status update on fusarium head blight on Western Canadian wheat Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-02-28 Tiffany Chin, Kerri Pleskach, Sheryl A. Tittlemier, Maria Antonia Henriquez, Janice Bamforth, Niradha Withana Gamage, Tehreem Ashfaq, Sung-Jong Lee, Mayantha Shimosh Kurera, Bhaktiben Patel, Sean Walkowiak
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
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Biological control of Fusarium oxysporum causing damping-off and Pythium myriotylum causing root and crown rot on cannabis (Cannabis sativa L.) plants Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-02-16 Cameron Scott, Zamir K. Punja
Abstract Damping-off, crown rot, and root rot caused by Fusarium oxysporum and Pythium spp. are important diseases that reduce the growth of cannabis plants and cause mortality. There are currently limited management options available to producers in the absence of registered chemical fungicides. The comparative efficacy of five biological-control agents in reducing disease severity was evaluated in
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Virulence characterization of the wheat stripe rust pathogen, Puccinia striiformis f. sp. tritici, in Turkey from 2018 to 2020 Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-02-06 Ahmet Cat, Mehmet Tekin, Kadir Akan, Taner Akar, Mursel Catal
Abstract Stripe (yellow) rust caused by Puccinia striiformis f. sp. tritici (Pst) is the most devastating disease of wheat in Turkey. Virulence characterization of the Pst population is critical to prevent large-scale epidemics, by developing wheat cultivars with durable resistance against the disease. In this study, 38 Pst races, including 25 races that were not previously reported, were identified
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First report of 16SrII-V phytoplasma associated with cowpea (Vigna unguiculata) phyllody in China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-02-03 Zhang Li, Li Zhanbiao, She Xiaoman, Tahir Farooq, Li Zhenggang, Yu Lin, Lan Guobing, He Zifu, Yafei Tang
Abstract Cowpea plants exhibiting virescence, phyllody and little leaf symptoms were observed in the fields of Zhanjiang City, Guangdong province of China in October 2020. Total DNA was extracted from symptomatic cowpea leaves. Using phytoplasma universal primer pairs (R16mF2/R16mR1, P1/P7) and a secA primer pair (secAfor1/secArev3), expected PCR fragments of approximately 1400, 1800 and 800 bp were
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First report of Ceratobasidium sp. AG-I (binucleate Rhizoctonia) causing root rot of Hedychium coronarium Koen in China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-02-02 Jiaqi Zheng, Lan Yao, Chaoran Liu, Changfeng Wu, Yuzhu Han
Abstract Hedychium coronarium Koen is a perennial flowering plant that has ornamental, nutritional and medicinal value. In October 2019, root rot symptoms were observed in fields of H. coronarium in Yunnan Province, China. Fungal isolates were obtained from the diseased samples and the pathogenicity was confirmed by fulfilling Koch’s postulates using wounded and unwounded plant inoculations. The pathogen
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Diatrype genheensis sp. nov. – a new wood-inhabiting species of Diatrypaceae (Xylariales, Ascomycota) from China Can. J. Plant Pathol. (IF 2.0) Pub Date : 2023-01-03 Zhan-En Yang, An-Hong Zhu, Bo Zhang, Zhi Qu, Hai-Xia Ma
Abstract A new species of Diatrype (Diatrypaceae, Xylariales), D. genheensis, is proposed based on a combination of morphological features and molecular evidence. Diatrype genheensis, from a fallen angiosperm branch in Inner Mongolia, is characterized by having 3–14 perithecia embedded within a stroma, polysporous asci and ascospores that are allantoid, slightly curved, aseptate and subhyaline. The