Full TGIF Record # 11456
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Web URL(s):http://www.apsnet.org/publications/plantdisease/backissues/Documents/1987Articles/PlantDisease71n12_1141.PDF
    Last checked: 08/25/2010
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Publication Type:
i
Refereed
Author(s):Wilkinson, H. T.
Author Affiliation:Department of Plant Pathology, University of Illinois, Urbana-Champaign, Illinois
Title:Yellow ring on Poa pratensis caused by Trechispora alnicola
Source:Plant Disease. Vol. 71, No. 12, December 1987, p. 1141-1143.
Publishing Information:St. Paul, Minn., American Phytopathological Society
# of Pages:3
Keywords:TIC Keywords: Yellow ring; Poa pratensis; Trechispora alnicola; Fungi; Disease control; Conidia
Abstract/Contents:"Trechispora alnicola was identified as the causal agent of yellow ring disease of Poa pratensis. The fungus was isolated from surface-sterilized roots and crown tissues of naturally infected sod. Mycelium and conidia were effective forms of inoculum when placed adjacent to the grass crowns or roots or drenched into sod. Kentucky bluegrass seedlings developed yellowed leaves, typical of yellow ring disease, 6-8 wk after inoculation. Inoculated sod required 16 wk to develop yellowed leaves. Disease severity was greatest at 20 and 25 C, and no disease symptoms developed at 30 C. Bluegrass susceptibility was not affected by maturation; both 3-wk-old and 2-yr-old sod were susceptible. The fungus was capable of saprophytic colonizaiton of naturally produced thatch. The fungus was readily recovered from inoculated grass roots after surface sterilization but not from crown tissue. In culture, the fungus grew most rapidly on thatch agar medium at 20-25 C and was capable of growth at 15 and 32 C."
Language:English
References:9
Note:Pictures
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wilkinson, H. T. 1987. Yellow ring on Poa pratensis caused by Trechispora alnicola. Plant Dis. 71(12):p. 1141-1143.
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Web URL(s):
http://www.apsnet.org/publications/plantdisease/backissues/Documents/1987Articles/PlantDisease71n12_1141.PDF
    Last checked: 08/25/2010
    Requires: PDF Reader
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