Full TGIF Record # 269868
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1974sup22a.pdf
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Publication Type:
Content Type:Abstract or summary only
Author(s):Smith, J. D.
Author Affiliation:Research Branch, Canada Department of Agriculture
Title:Overwintering diseases of turfgrasses in Saskatchewan
Other records with the "Diseases" Section
Meeting Info.:Blacksburg, Virginia: June 19-21, 1973
Source:Abstracts of Papers Presented at the Second International Turfgrass Research Conference. 1973, p. 22.
Publishing Information:Blacksburg, Virginia: [International Turfgrass Society]
# of Pages:1
Keywords:TIC Keywords: Disease surveys; Low temperature diseases; Microdochium nivale; Myriosclerotinia borealis; Snow molds; Typhula
Geographic Terms:Saskatchewan, Canada
Abstract/Contents:"A lack of precise diagnostic evidence on the causes and distribution of snow molds and related winter problems is a deficiency in turfgrass breeding and plant protection research in Saskatchewan. Surveys in spring 1969 showed only 12% of 900 domestic lawns in Saskatoon free from snow mold. In 1971, of 1200 lawns at 7 centers in the province 18% were free from these diseases; in 1972, this figure was 56% on 1600 lawns at 14 centers. The results of surveys and taxonomic studies have perturbed the concept of a broadly north/south distribution of the psychrophilic turfgrass pathogens, Sclerotinia borealis, Typhyla [Typhula] spp., the unidentified low-temperature basidiomycete (LTB) and Fusarium nivale in N. America. In all Sask. locations in 1972 more than one of these pathogens was prominent, in some places several were found. F. nivale and S. borealis, new records for Sask., caused severe snow mold at survey locations throughout the province where the common turfgrass pathogen had been assumed to be the LTB. The latter was rarely isolated in 1972. Three apparently undescribed sclerotial basidiomycetes were widespread on snow mold patches from southeastern Sask. to the Peace River region of northern Alberta and B. C. A micro-sclerotial low-temperature basidiomycete (MLTB) has black or brown, spherical, ovate or irregular and flattened sclerotia. This does not seem to be a Typhula spp. Isolates were not cyanogenetic. Orange-colored, resilient sclerotia without differentiation into peripheral hyphae and medulla characterizes the second fungus. It may be a Corticium or a Coniophora. The third fungus is apparently a Typhula sp.; it is not identical with T. ishikariensis. Quintozene, chloroneb, an oxathiin derivative, benlate and topsin showed promise as substitutes for the standard inorganic and organo-mercurials. Some of the fungicides showed specificity in field tests on turf inoculated with ryecorn cultures of F. nivale, the LTB or S. borealis and on naturally inoculated turf. The studies suggest the need to test for resistance to several mown and other probably snow molds in the turfgrass breeding program for the Central Prairies and to take these into account when making recommendations for fungicidal treatment."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, J. D. 1973. Overwintering diseases of turfgrasses in Saskatchewan. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 22.
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    Last checked: 03/16/2016
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