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Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article presents a reprint of the article "The Phenomenal Decline of Browning Root Rot ( Pythium spp.) on the Canadian Prairies," by T.C.Vanterpool, which appeared in the periodical "Scientific Agriculture." It states that use of phosphatic fertilizers on fallow crop and return to the land of crop residue by harvesting's combined method led to decline in this wheat crop disease.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Discusses the abstracts of several research papers on plant pathology presented during the British Columbia Regional Meeting of the Canadian Phytopathological Society in 2003. Range of issues and subject matter discussed by the research papers; Author credits; Implications on studies of plant pathology.

The article presents a reprint of the article "The Organism Causing Dwarf Bunt of Wheat," by I.I. Conners, which appeared in the periodical "Canadian Journal of Botany." According to a study it was revealed that the organism was different from the common bunt fungus tilletia caries. It mentions that it was likely due to some grass smut, which affected native species of agropyron in Europe and Turkestan.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Black leg of canola (Brassica napus), caused by Leptosphaeria maculans, is primarily controlled by the use of resistant cultivars. In Canada, resistance has been effective for about 10 years, but the frequency of new pathotypes is increasing and there are reports of breakdown of resistance in some cultivars. Race-nonspecific resistance is present in many cultivars in Australia and Europe. The genetic basis of resistance in Canadian cultivars is unknown. This paper reviews our current knowledge relating to disease management using resistance in Canada and the genetics of race-specific and race-nonspecific resistance in the host-pathogen interaction between L. maculans and B. napus. The particular focus is on resistance associated with the A genome and how resistance might be achieved over the long term. [ABSTRACT FROM AUTHOR]

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article discusses the study which evaluates the foliar fungicide application methods on soybean in Canada. A field trial was conducted in 2005 and 2006 to evaluate different fungicide application methods on soybean. According to the result of the study, visible symptoms of foliar fungal diseases were not present.

Profiles Ralph Howard Estey, plant pathologist and recipient of the Canadian Phytopathological Society Lifetime Achievement Award for 2003. Educational background; Papers published.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Profiles Paul H. Goodwin, plant pathologist and recipient of the Canadian Phytopathology Society's Outstanding Young Scientist Award for 2003. Research activities on molecular and cellular biology of different plant diseases; Number of peer-reviewed scientific papers published.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

An increase in the cultivation of Cannabis sativa (cannabis or marijuana) plants in Canada is becoming associated with increased incidence and severity of various diseases, many of which have not been previously reported. In this study, hydroponically grown C. sativa plants were sampled over a 3-year period (2014-2017) to determine the prevalence of root pathogens. Following isolation, pathogenicity studies were conducted to establish the extent of disease symptoms caused by the recovered microbes. Root rot was found to be caused by two Pythium species - Pythium dissotocum Drechsler and P. myriotylum Drechsler. As well, two Fusarium species were recovered from diseased plants - Fusarium oxysporum Schlecht. emend. Snyder & Hansen and F. solani (Mart.) Sacc. Upon inoculation onto healthy plants, all isolates of Pythium spp. caused browning and a reduction in root mass, accompanied by stunting. Inoculation of plants with F. oxysporum caused browning of roots and crown rot infection, accompanied by pith and vascular discolouration, and in some cases wilting of plants, while root and crown infection was observed with F. solani. Phylogenetic analysis of internal transcribed spacer (ITS) and elongation factor 1α (EF-1α) sequences revealed that the Fusarium species affecting cannabis plants shared 99-100% sequence homology with isolates causing stem rot and wilt in other hosts, including cumin and tomato, suggesting they were not uniquely adapted to cannabis. The potential for spread of F. oxysporum through the hydroponic system was confirmed by its detection in the recirculating nutrient solution. Furthermore, rooted cuttings obtained from commercial propagators were found to harbour Fusarium root infection that resulted in subsequent stunting, yellowing and occasional death of plants. This demonstrates the potential for long-distance spread of the pathogen. The two Pythium species recovered from cannabis plants have an extremely broad host range and are not unique to this host. An additional species, P. aphanidermatum (Edson) Fitzp., was recovered from diseased plants grown under greenhouse conditions in 2018. The management of these root pathogens on C. sativa will require the evaluation and implementation of sanitization methods, biological control agents, and chemical products adapted from greenhouse vegetable production practices. The use of pathogen-free propagation materials and identification of potential sources of disease resistance should also become a priority. [ABSTRACT FROM AUTHOR]

Discusses the abstract of the paper "First report of clubroot of canola caused by Plasmodiophora brassicae in the Canadian prairies," by J.P. Terwin et al, presented during the joint regional meeting of the Alberta and Saskatchewan units of the Canadian Phytopathology Society in 2003.

Discusses the abstract of the paper "Pathogenic variability of Asoschochyta rabiei populations on chickpea in Saskatchewan," by S. Vail et al, presented during the joint regional meeting of the Alberta and Saskatchewan units of the Canadian Phytopathology Society in 2003.

Profiles Waldemar E. Sackston, plant pathologist and recipient of the Canadian Phytopathological Society Lifetime Achievement Award for 2003. Educational background; Study of sunflower disease problems.

Discusses the abstract of the article "An epidemiological study of verticillium wilt of potatoes: host-pathogen interactions of various Verticillium spp.," by N. Robinson, H.W. Platt, L. Hale and V. MacLean, submitted to the 2003 Canadian Phytopathological Society Annual Meeting in Montreal, Quebec.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article focuses on the development of a strategy by a team of researchers from universities and federal and provincial governments in Canada to address the issue on clubroot disease under the auspices of the Clubroot Risk Mitigation Initiative (CRMI) of Agriculture and AgriFood Canada and the Canola Council of Canada. The project aims to mitigate the risk of the disease to canola production. Also it examines a wide range of management options, and to provide new information on the pathogen.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Discusses the abstract of the paper "Occurrence of black knot on Prunus spp. in Alberta in 2003," by R.J. Howard et al, presented during the joint regional meeting of the Alberta and Saskatchewan units of the Canadian Phytopathology Society in 2003.

Discusses the abstract of the paper "Assesment of the environmental suitability of the western Prairie region of Canada for fusarium head blight caused by Fusarium graminearum," by T.K. Turkington et al, presented during the third Canadian workshop on fusarium head blight, held in Winnipeg, Manitoba, in 2003.

Discusses the abstract of the paper "Identification of two races of Collectrichum truncatum in Saskatchewan," by K.L. Anderson et al, presented during the joint regional meeting of the Alberta and Saskatchewan units of the Canadian Phytopathology Society in 2003.

Discusses the abstract of the paper "Progress in forecasting: fusarium head blight risk forecasts in Manitoba," by D. Kaminski, presented during the third Canadian workshop on fusarium head blight, held in Winnipeg, Manitoba, in 2003.

Discusses the abstract of the article "Epidemiology of sclerotinia head rot in wild sunflower," by K.Y. Rashid and G.J. Seiler, submitted to the 2003 Canadian Phytopathological Society Annual Meeting in Montreal, Quebec.

Discusses the abstract of the article "Flax rust races--an important collection needs preservation," by K.Y. Rashid, submitted to the 2003 Canadian Phytopathological Society Annual Meeting in Montreal, Quebec.

Discusses the abstract of the article "Use of bacteriophages for the management of soft rot of calla lilies caused by Erwinia sp. in closed irrigation systems," by M. Ravensdale, T. Blom, J. Gracia-Garza and A. Svircev, submitted to the 2003 Canadian Phytopathological Society Annual Meeting in Montreal, Quebec.

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article discusses the study that investigates the resistance of barley, oats and wheat to smut diseases in western Canada. It explores the taxonomy of the pathogens of smut disease as well as the methods used in evaluating its pathogenic variability in small grain cereals. It also offers information on the techniques used in inoculating cultivar lines of smut disease resistance along with its role in the country's regulatory system.

The article discusses the study that investigates the host specificity of Colletotrichum truncatum (CT) from weed scentless chamomile in western Canada. The study was conducted by understanding the risk, potential infection strategy and biocontrol agents of chamomiles, and their cross infection was observed through inoculation. The study reveals the absence of infection structures from the lentil leaves which depict the absence of endophytic colonization and infection during incubation.

The article reports on a study of the description, distribution, and identification of species of Pratylenchus, a nematode, in Canada. It founds out that the most common specie was Pratylenchus penetrans followed by Pratylenchus crenatus and Pratylenchus neglectus. It also showed that Pratylenchus fallax was associated with grasses while Pratylenchus macrostylus was found on pine.

The article discusses the study which focuses on the biological control of damping-off on American ginseng by Clonostachys rosea f. catenulata in Canada. Seedling damping-off caused by several soilborne fungal pathogens is a recurring problem for commercial growers of American ginseng throughout the major areas of the country.

The article discusses the study focusing on the application of a simplified protocol for nucleic acid preparation for polymerase chain reaction (PCR) detection of greening bacterium and Citrus mosaic virus associated with citrus tissues in Canada. The protocol is simple, inexpensive, rapid, and applicable to large-scale surveys of citrus trees.

The article discusses the study which focuses on the detection of Phytophthora melonis in samples of soil, water, and plant tissue with polymerase chain reaction (PCR) in Canada. The PCR assay for the detection of Phytophthora melonis was developed. The PCR-based methods developed could simplify both plant disease diagnosis and pathogen monitoring.

The article discusses the study which examines the effect of systematic fungicide metalaxyl-m on endophytic populations of bacteria in tubers of potatoes in Canada. The frequency of bacterial endophytes with antibiosis activity against Phytophthora erythroseptica and Fusarium avenaceum was not independent of fungicide regime.

The article provides information concerning the bacteriophages and the control of Erwinia carotovora subsp. carotova in Canada. Fourteen bacteriophages of Erwinia carotovora subsp. carotova were isolated from samples of fertilizer solutions taken from a greenhouse producing calla lily. Molecular characterization of the phages with restriction endonuclease digestions shows that two distinct types had been isolated.

The article reports on the exploration of the possible effects of climate change on the geographic range or local impact of several forest-pathogenic fungi in Canada. The parameters of species' responses to climate variables were determined in two types of models. These models were used to make simulations under a future climatic scenario on a general model of climate.