Full TGIF Record # 263738
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Web URL(s):http://turf.rutgers.edu/research/abstracts/symposium2015.pdf#page=37
    Last checked: 07/30/2015
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Hempfling, James W.; Clarke, Bruce B.; Murphy, James A.
Author Affiliation:Department of Plant Biology and Pathology, Rutgers University
Title:Nitrogen fertility, mowing height and topdressing effects on anthracnose and playability of annual bluegrass
Section:Poster presentations
Other records with the "Poster presentations" Section
Meeting Info.:New Brunswick, New Jersey: January 16, 2015
Source:Proceedings of the Twenty-Fourth Annual Rutgers Turfgrass Symposium. 2015, p. 36.
Publishing Information:New Brunswick, New Jersey: The Center for Turfgrass Science, Rutgers, The State University of New Jersey
# of Pages:1
Keywords:TIC Keywords: Anthracnose; Colletotrichum graminicola; Control methods; Cultural control; Disease control; Evaluations; Golf greens; Growth factors; Mowing height; Nitrogen fertilization; Playability; Poa annua; Topdressing
Abstract/Contents:"Anthracnose disease of annual bluegrass (Poa annua L.) putting greens, caused by Colletotrichum cereal Manns, can be suppressed by increasing nitrogen fertility, mowing height, and sand topdressing. Interactive effects of these practices on disease severity and ball roll distance of annual bluegrass turf remain unknown. A 3-yr field trial was initiated in 2012 in North Brunswick, NJ to evaluate the effects of mowing height, N fertility, and sand topdressing on anthracnose severity and playability of annual bluegrass turf. Treatments were all combinations of mowing height (2.3 and 3.2 mm), N fertility (100 and 200 kg ha-1 yr-1), and sand topdressing (46.4 and 97.6 tonne ha-1 yr-1 during 2012; 36.6 and 80.6 tonne ha-1 yr-1during 2013and 2014). Trinexapac-ethyl was applied weekly at 0.05 kg a.i. ha-1, and light-weight vibratory rolling was performed three times wk-1 to maintain surface conditions similar to commercial putting greens. As expected, increased N fertility, mowing height, and sand topdressing reduced disease severity, reported as the area under the disease progress curve (AUDPC). Nitrogen fertility accounted for the majority of the variation in AUDPC, and mowing height accounted for a slightly greater amount than sand topdressing. Interestingly, more frequent sand topdressing produced greater disease suppression when turf was maintained under low N or low mowing (compared to high N or high mowing, respectively) in 2012 and 2014. Recovery from disease damage was enhanced by higher mowing, increased N fertility, and more frequent topdressing. Long-term recovery was hindered the most by low mowing under infrequent topdressing. In regard to ball roll distance (green speed), the relative importance of management factors differed from that observed with AUDPC responses. Increased mowing height caused a substantial reduction in ball roll distance, whereas greater N fertility and sand topdressing had minimal effects on ball roll distance. These findings suggest that priority should be given to lowering mowing height rather than reducing N fertility or sand topdressing rates to increase ball roll distance without greatly increasing anthracnose severity."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hempfling, J. W., B. B. Clarke, and J. A. Murphy. 2015. Nitrogen fertility, mowing height and topdressing effects on anthracnose and playability of annual bluegrass. Proc. Rutgers Turfgrass Symp. p. 36.
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Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2015.pdf#page=37
    Last checked: 07/30/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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