Full TGIF Record # 136675
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Web URL(s):http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2008.98.6.S9#page=17
    Last checked: 10/20/2015
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Brandt, N.; Koski, A.; Tisserat, N.
Author Affiliation:Colorado State University
Title:The effect of nitrogen, sulfur and fungicide applications on the severity of necrotic ring spot of Kentucky bluegrass
Source:Phytopathology. Vol. 98, No. 6, June Supplement 2008, p. S25.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Ophiosphaerella korrae; Disease severity; Poa pratensis; Fertilization timing; Nitrogen; Sulfur; Fungicide application; Fertilization rates
Abstract/Contents:"Necrotic ring spot (NRS), caused by Ophiosphaerella korrae, is the most serious disease of Kentucky bluegrass lawns in Colorado. We studied the influence of fertilizer rates, formulation and timing, and fungicide applications on NRS severity. Urea and urea plus sulfur (U, U+S) were applied in spring and fall to a diseased residential lawn beginning in October 2005. A urea­based, timed­released (TR) fertilizer was applied once to the same lawn in April of 2006 and 2007. The three N formulations were applied at a rate of 98 and 196 kg ha-1 yr-1. Azoxystrobin (Heritage) was applied in mid­May and mid­July each year. There were no differences in NRS severity between fertilizer rates on any rating date. However, NRS was more severe in TR fertilizer plots in both years. In subsequent studies, we observed the highest nitrogen content in leaves in May following the TR application. Application of sulfur with urea suppressed NRS in the second year compared to urea applications alone. Two applications of azoxystrobin reduced NRS severity in August of both years."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brandt, N., A. Koski, and N. Tisserat. 2008. The effect of nitrogen, sulfur and fungicide applications on the severity of necrotic ring spot of Kentucky bluegrass. Phytopathology. 98(6):p. S25.
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Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2008.98.6.S9#page=17
    Last checked: 10/20/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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