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You searched for: Journal Canadian journal of plant pathology Remove constraint Journal: Canadian journal of plant pathology Publication Year 2017 Remove constraint Publication Year: 2017 Source 2017 v.39 no.4 Remove constraint Source: 2017 v.39 no.4
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1. Aetiology of stemphylium blight on lentil in Canada

Author:
Caudillo-Ruiz, Kiela B.; Bhadauria, Vijai; Banniza, Sabine
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 422-432
ISSN:
1715-2992
Subject:
Coriandrum sativum; Stemphylium; alfalfa; blight; caraway; conidia; crops; faba beans; fenugreek; genes; glyceraldehyde-3-phosphate dehydrogenase; hosts; internal transcribed spacers; lentils; morphometry; pathogens; peas; phylogeny; soybeans; transcription (genetics); Canada
Abstract:
... Field isolates of Stemphylium spp. collected from lentil and nine other western Canadian crops were compared to the ex-type isolate of Stemphylium botryosum by morphology and by molecular phylogenetic analysis based on the internal transcribed spacer (ITS) and the glyceraldehyde-3-phosphate dehydrogenase gene regions. Sequence data of these genes for six other Stemphylium spp. obtained from GenBan ...
DOI:
10.1080/07060661.2017.1378728

2. A qRT-PCR method to evaluate viability of potato cyst nematode (Globodera spp.)

Author:
Mimee, Benjamin; Soufiane, Brahim; Dauphinais, Nathalie; Bélair, Guy
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 503-513
ISSN:
1715-2992
Subject:
DNA; Globodera rostochiensis; cyst nematodes; eggs; fumigation; genotype; growers; heat treatment; methyl bromide; organobromine compounds; planting; potatoes; quantitative polymerase chain reaction; quarantine; reverse transcriptase polymerase chain reaction; soil; viability; Quebec
Abstract:
... Potato cyst nematodes (PCN) – Globodera rostochiensis and G. pallida – cause significant yield losses on potato worldwide. One of the main challenges to PCN management is the ability of PCN to remain dormant in the soil for several decades. For that reason, many countries have strict quarantine regulations for PCN. These regulations, although expensive and restrictive for growers, are necessary to ...
DOI:
10.1080/07060661.2017.1382574

3. First report of Verticillium dahliae Kleb. causing wilt symptoms in canola (Brassica napus L.) in North America

Author:
Hwang, Sheau-Fang; Strelkov, Stephen E.; Ahmed, Hafiz U.; Zhou, Qixing; Fu, Heting; Fredua-Agyeman, Rudolph; Turnbull, George D.
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 514-526
ISSN:
1715-2992
Subject:
Brassica napus; DNA primers; Verticillium dahliae; Verticillium longisporum; Verticillium wilt; agar; canola; catechol oxidase; color; conidia; conidiophores; cultivars; enzyme activity; growth retardation; leaves; polymerase chain reaction; sclerotia; sequence analysis; surveys; vascular tissues; Alberta; Manitoba
Abstract:
... In Canada, Verticillium wilt of canola (Brassica napus L.), caused by Verticillium longisporum, was first confirmed in Manitoba in 2014. Verticillium dahliae, however, has not been reported to cause this disease. In 2016, a field survey in Alberta revealed canola plants with vascular wilt symptoms. Symptomatic plants were collected and infected stem tissue was cultured on agar medium, with one iso ...
DOI:
10.1080/07060661.2017.1375996

4. Identification of Colletotrichum brevisporum causing anthracnose on passion fruit

Author:
Du, Yi-Xin; Shi, Niu-Niu; Chen, Wen-Le; Ruan, Hong-Chun; Yang, Xiu-Juan; Gan, Lin; Dai, Yu-Li; Chen, Fu-Ru
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 527-532
ISSN:
1715-2992
Subject:
Colletotrichum; Passiflora edulis; actin; anthracnose; color; disease incidence; fruits; genes; glyceraldehyde-3-phosphate dehydrogenase; internal transcribed spacers; leaves; passion fruits; pathogen identification; pathogenicity; sequence analysis; stems; transcription (genetics); tubulin; vines; China
Abstract:
... Passion fruit (Passiflora edulis Sims.) has become an important commercial fruit with large-scale cultivation in China. A disease affecting the stems, fruits, leaves and tendrils was observed on passion fruit vines in Sanming, Fujian Province, China, in August 2015. The typical symptoms included lesions of oval to irregular shapes, brown to brownish black in colour, with sunken cavities. Acervuli ...
DOI:
10.1080/07060661.2017.1367725

5. Impact of climate change and race evolution on the epidemiology and ecology of stripe rust in central and eastern USA and Canada

Author:
Lyon, Becky; Broders, Kirk
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 385-392
ISSN:
1715-2992
Subject:
Puccinia striiformis f. tritici; climate change; crop production; disease outbreaks; disease severity; ecology; evolution; models; monitoring; overwintering; pathogens; races; risk; stripe rust; virulence; virulent strains; weather; wheat; Canada; Eastern United States
Abstract:
... Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most devastating diseases of wheat globally. Since 2000, the geographic footprint of Pst has increased in North America due to a combination of changing weather patterns and introductions of new and more virulent strains. Pst is endemic throughout North America, but the emergence of new virulent strains poses an increa ...
DOI:
10.1080/07060661.2017.1368713

6. Impact of Fusarium graminearum on early-season soybean growth and seed yield under field conditions

Author:
Marburger, David A.; Smith, Damon L.; Conley, Shawn P.
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 464-474
ISSN:
1715-2992
Subject:
Fusarium graminearum; Glycine max; Triticum aestivum; Zea mays; corn; cultivars; field experimentation; fludioxonil; growers; growing season; mefenoxam; pathogens; seed treatment; seed yield; soybeans; wheat; Wisconsin
Abstract:
... Fusarium graminearum is primarily regarded as an economically important pathogen on wheat (Triticum aestivum L.) and corn (Zea mays L.), but recently it has also been shown to be pathogenic to soybean [Glycine max L. (Merr.)]. However, little is known about its impact on soybean early-season growth and seed yield under field conditions. A field experiment was conducted near Arlington, WI during th ...
DOI:
10.1080/07060661.2017.1378727

7. Pathogenic and genetic variability of Fusarium verticillioides from maize in northern Mexico

Author:
Leyva-Madrigal, Karla Y.; Sandoval-Castro, Eduardo; Calderón-Vázquez, Carlos L.; Larralde-Corona, Claudia P.; Maldonado-Mendoza, Ignacio E.
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 486-496
ISSN:
1715-2992
Subject:
Fusarium verticillioides; aggression; alleles; asexual reproduction; chemical control; corn; disease control; fungi; gene flow; genetic analysis; genetic variation; haplotypes; hyphae; mutation; mycotoxins; pathogenicity; pathogens; root rot; roots; seedlings; seeds; sexual reproduction; Mexico
Abstract:
... The filamentous fungus Fusarium verticillioides is a widely distributed pathogen that causes ear, stalk and root rot of maize. This fungus also produces mycotoxins that accumulate in maize kernels. As chemical control has proven to be insufficient, new and effective disease control measures must be implemented. An improved understanding of the diversity of pathogen populations is thus crucial. Her ...
DOI:
10.1080/07060661.2017.1378726

8. Physiological and molecular responses of resistant and susceptible wheat cultivars to Fusarium graminearum mycotoxin extract

Author:
Sorahinobar, Mona; Soltanloo, Hassan; Niknam, Vahid; Ebrahimzadeh, Hassan; Moradi, Babak; Safaie, Naser; Behmanesh, Mehrdad; Bahram, Mohammad
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 444-453
ISSN:
1715-2992
Subject:
Fusarium graminearum; Fusarium head blight; catalase; catechol oxidase; cultivars; cytochrome P-450; drug resistance; enzyme activity; gene expression; grain yield; hydrogen peroxide; malondialdehyde; mycotoxins; oxidative stress; peroxidase; phenylalanine ammonia-lyase; quantitative polymerase chain reaction; spikelets; superoxide dismutase; wheat
Abstract:
... Fusarium graminearum, causing Fusarium head blight (FHB), is one of the most important diseases on cereals worldwide leading to a reduction in both grain yield and quality. Currently, there is limited knowledge about the physiological and molecular mechanisms involved in wheat resistance against F. graminearum mycotoxins. Crude culture extract of F. graminearum was used to determine the physiologi ...
DOI:
10.1080/07060661.2017.1379442

9. Physiological specialization of Puccinia triticina, the causal agent of wheat leaf rust, in Canada in 2011

Author:
McCallum, Brent D.; Seto-Goh, Pat; Xue, Allen
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 454-463
ISSN:
1715-2992
Subject:
Puccinia recondita; breeding; cultivars; leaf rust; mature plants; phenotype; seedlings; virulence; wheat; Alberta; Manitoba; Ontario; Prince Edward Island; Quebec; Saskatchewan
Abstract:
... Leaf rust collections were made across Canada in 2011 and 287 single-pustule isolates were tested for virulence on 16 standard differential lines and two additional lines containing Lr21 and LrCen, respectively. Of the 70 different virulence phenotypes found in Canada during 2011, the most common were TDBJ (12.5%), TDBG (10.5%) and MLDS (7.7%), which is similar to the findings from 2010. Three iso ...
DOI:
10.1080/07060661.2017.1386715

10. Pratylenchus species associated with blueberry (Vaccinium spp.) and weed species in the Pacific North-west of North America

Author:
Zasada, Inga; Peetz, Amy; Forge, Tom
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 497-502
ISSN:
1715-2992
Subject:
Bellis perennis; Calystegia sepium; Capsella bursa-pastoris; Cynodon dactylon; Echinochloa crus-galli; Epilobium angustifolium; Hypochaeris radicata; Persicaria lapathifolia; Pratylenchus crenatus; Senecio; Sonchus; Taraxacum officinale; Trifolium; Vaccinium; autumn; blueberries; dominant species; hosts; population density; root lesion nematodes; roots; soil; soil sampling; spring; weeds; Canada; United States
Abstract:
... Blueberry (Vaccinium spp.) is a rapidly growing segment of the agricultural sectors in the Pacific North-west (PNW) of the USA and Canada. Plant-parasitic nematodes are commonly found in blueberry production fields, with root lesion nematodes (Pratylenchus species) reported as being widespread; however, the identity of these populations associated with blueberry roots has not been previously deter ...
DOI:
10.1080/07060661.2017.1367724

11. Race characterization of Pyrenophora tritici-repentis and sensitivity to propiconazole and pyraclostrobin fungicides

Author:
MacLean, Dustin E.; Aboukhaddour, Reem; Tran, Van Anh; Askarian, Homa; Strelkov, Stephen E.; Turkington, T. Kelly; Kutcher, Hadley R.
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 433-443
ISSN:
1715-2992
Subject:
Pyrenophora tritici-repentis; fungi; germination; growers; leaf spot; pathogens; polymerase chain reaction; propiconazole; pyraclostrobin; races; spraying; wheat; Alberta; Saskatchewan
Abstract:
... Tan spot, caused by Pyrenophora tritici-repentis (Ptr), is one of the most destructive leaf spot diseases of wheat in Canada. Several races of the fungus are known to occur. Wheat growers have adopted fungicides to manage tan spot; however, intensive spraying may lead to development of reduced sensitivity to fungicides in the pathogen. In this study, 62 Ptr isolates were collected from across Sask ...
DOI:
10.1080/07060661.2017.1387178

12. Role of pycnidia in twig and blossom blight and stem dieback of highbush blueberry caused by Phomopsis vaccinii in British Columbia

Author:
Nabetani, Keiko; Wood, Brandon Kirk; Sabaratnam, Siva
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 405-421
ISSN:
1715-2992
Subject:
Diaporthe; Vaccinium corymbosum; agar; blight; blueberries; branches; bud set; conidia; developmental stages; dieback; germination; growing season; histology; leaf abscission; mycelium; pathogenicity; phenology; photoperiod; pycnidia; temperature; tissues; weather; British Columbia
Abstract:
... Twig and blossom blight, and stem dieback, has become an impediment to highbush blueberry (Vaccinium corymbosum L.) production in British Columbia. Periodic assessment of disease symptoms and pathogenicity test confirmed Phomopsis vaccinii to be the major causal agent of the disease. Symptomatic tissues sampled at 7- to 10-day intervals in the 2014 and 2015 growing seasons were examined for presen ...
DOI:
10.1080/07060661.2017.1375995

13. Soft rot of potatoes caused by Bacillus amyloliquefaciens in Guangdong province, China

Author:
Wang, Li; Li, Xiao-Bo; Suo, Hai-Cui; An, Kang; Luo, Huan-Min; Liu, Xiao-Jin
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 533-539
ISSN:
1715-2992
Subject:
Bacillus amyloliquefaciens; bacteria; hosts; onions; pathogenicity; potatoes; tomatoes; tubers; China
Abstract:
... Potato tubers exhibiting symptoms of soft rot were observed in a field in Baiyun District, Guangzhou, Guangdong Province, China, in March 2016. Bacteria were isolated from the diseased potato tubers. Using morphological and molecular (16S rDNA and gyrB) characterization and pathogenicity tests, a representative isolate of the bacterium was identified as Bacillus amyloliquefaciens. Inoculating the ...
DOI:
10.1080/07060661.2017.1381994

14. Using a biovigilance approach for pest and disease management in Quebec vineyards

Author:
Carisse, O.; Fall, M. L.; Vincent, C.
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 393-404
ISSN:
1715-2992
Subject:
aggression; biodiversity; climate change; crop rotation; cultivars; disease control; ecosystem services; fertilizers; genetic improvement; insects; mechanization; natural enemies; natural selection; new crops; pathogens; perennials; pesticide resistance; pesticides; plant products; plant protection; vineyards; viticulture; weeds; Quebec
Abstract:
... Biovigilance can be defined as the study of the unintentional effects of various factors on pest (insects, pathogens, and weeds) populations, biodiversity and ecological services. Biovigilance research allows for the detection of significant temporal and spatial trends that may be linked to agricultural practices, new plant protection products, cultivars grown, new crops, climate change, or emergi ...
DOI:
10.1080/07060661.2017.1366368

15. Weather thresholds for clubroot development on canola and brassica vegetables

Author:
Gossen, Bruce D.; Cranmer, Travis J.; Gludovacz, Thomas V.; Mcdonald, Mary Ruth
Source:
Canadian journal of plant pathology 2017 v.39 no.4 pp. 475-485
ISSN:
1715-2992
Subject:
Brassica napus; cabbage; canola; clubroot; cole crops; cultivars; data collection; flowering; heat; heat sums; hosts; models; rain; soil water; soil-borne diseases; sowing date; spores; temperature; Ontario
Abstract:
... Clubroot, caused by Plasmodiaphora brassicae, is an important soil-borne disease of canola (Brassica napus) and other brassica crops worldwide. Temperature and soil moisture are known to affect clubroot development. To understand the influence of weather on development of clubroot, replicated small-plot seeding date trials were conducted from 2011 to 2014 at the Muck Crops Research Station in sout ...
DOI:
10.1080/07060661.2017.1369459