Full TGIF Record # 173335
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Web URL(s):http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2010.100.6.S193#page=5
    Last checked: 12/6/2010
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Roberts, J. A.; Murphy, J. A.; Clarke, B. B.
Author Affiliation:Roberts, Murphy and Clarke: Rutgers University, New Brunswick, NJ
Title:Summer N-fertilization effects on annual bluegrass putting green turf
Section:2009 Northeastern Division Meeting abstracts
Other records with the "2009 Northeastern Division Meeting abstracts" Section
Source:Phytopathology. Vol. 100, No. 65, June supplement 2010, p. S197.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Anthracnose; Application methods; Application rates; Disease severity; Nitrogen fertilization; Poa annua
Abstract/Contents:"Anthracnose, caused by Colletotrichum cereale Manns, is a devastating disease of putting green turf. Increased N fertility has been reported to reduce anthracnose severity on annual bluegrass [Poa annua L. f. reptans (Hausskn) T. Koyama] turf. In 2007, a 3-yr field study was initiated in North Brunswick, NJ to determine the effect of rate and frequency of soluble-N fertility during mid-season on anthracnose severity of annual bluegrass turf maintained at 3.2 mm. The date of initiating N fertilization (mid-May vs. mid-June) was also evaluated during 2008 and 2009. Nitrogen was applied at 4.9 kg ha-1 every 1, 2, 4 and 8 wk and 9.8 kg ha-1 every 2 and 4 wk as a solution of NH4NO3. Anthracnose severity, assessed as area under the disease progress curve, was reduced linearly with increasing total N rate (9.8 to 58.8 kg ha-1). Nitrogen applied at 58.8 kg ha-1 total (4.9 kg ha-1 wk-1 or 9.8 kg ha-1 2 wk-1) had the greatest reduction in anthracnose severity throughout the study. Nitrogen applied at 29.9 kg ha-1 over the season (4.9 kg ha-1 2 wk-1) was the lowest N rate to significantly reduce disease severity, and anthracnose was most severe on turf receiving N at 19.6 and 9.8 kg ha-1 (4.9 kg ha-1 4 wk-1 or 8 wk-1) over the season. Initiating N fertilization before symptom expression (mid-May) reduced anthracnose severity compared to fertilization initiated at the onset of disease (mid-June) in 2008. Thus, fertilization techniques that increased midseason N fertility, within the range of 29.9 to 58.8 kg ha-1, were effective at reducing anthracnose severity on annual bluegrass turf."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roberts, J. A., J. A. Murphy, and B. B. Clarke. 2010. Summer N-fertilization effects on annual bluegrass putting green turf. Phytopathology. 100(65):p. S197.
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Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2010.100.6.S193#page=5
    Last checked: 12/6/2010
    Requires: PDF Reader
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