Full TGIF Record # 74404
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Web URL(s):http://web.archive.org/web/20061205204057/http://www.uoguelph.ca/GTI/itsweb/proceedings.pdf#page=33
    Last checked: 05/23/2017
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Kaminski, J. E.; Dernoeden, P. H.
Author Affiliation:University of Maryland
Title:Biological aspects of Ophiosphaerella agrostis and bentgrass dead spot
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Meeting Info.:Toronto, Ontario, Canada: 15-21 July, 2001
Source:IXth International Turfgrass Research Conference. Vol. 9, 2001, p. 69.
Publishing Information:[Toronto, Canada]: International Turfgrass Society
# of Pages:1
Keywords:TIC Keywords: Ophiosphaerella agrostis; Fall spot of bentgrass; Cynodon; Agrostis stolonifera; Methyl bromide; Golf greens; Golf courses; Golf tees; Growth rate; Mycelium; Disease identification; Fumigation; Infection
Abstract/Contents:"Bentgrass dead spot (BDS) is incited by Ophiosphaerella agrostis Dernoeden, Câmara, O'Neill, van Berkum, and Palm, and has been found in 12 U. S. states. The pathogen attacks Agrostis spp. and Cynodon spp. In Agrostis stolonifera L., BDS develops in turf grown on sand-based mixes in stands less than 6 yr old or following fumigation with methyl bromide. The disease occurs on putting greens and tees, and has not been found on fairways or other sites where turf is grown on native soil. The optimum growth rate of O. agrostis on PDA is between 25 and 30 C. The fungus overwinters as pseudothecia and as mycelium in infected plant tissue. In winter-dormant bentgrass, BDS was reactivated in 12 to 28 d by incubating plugs at 20 to 30C [30 C]. In the field, BDS may appear in June and can remain active until frost. Patches increase slowly, but generally do not exceed 8 cm diam. Pseudothecia may develop prior to the appearance of disease symptoms and over 200 can be produced in a single patch. Ascospores are ejected several cm above the turf canopy or ooze from ostioles, and spores can infect leaves, stems or roots. Ascospores germinate within 2 h in light in the presence of bentgrass leaves; low levels of germination occur in the dark and in the absence of leaves. New disease spots appear 2 to 4 d following initial infection."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E., and P. H. Dernoeden. 2001. Biological aspects of Ophiosphaerella agrostis and bentgrass dead spot. Int. Turfgrass Res. Conf. 9:p. 69.
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    Last checked: 05/23/2017
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    Notes: Document is within a single large file
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