brown patch (Rhizoctonia solani) was active. Similar to 2015 and 2016, locations in the
South and Southeast generally did not note large entry differences with anywhere from 50-75% of all entries performing statistically similar to the top turfgrass quality scorer in 2017. Data from our Southwest site (Riverside, CA) showed good entry separation, like in 2016. 4th Millennium SRP, Screamer LS, Maestro, PSG-P01 and Technique, top performers in 2016, along with IS-TF 311 and Regenerate were some of the highest rated entries in 2017 at the Riverside location. In the Midwest, some significance was noted at
four locations: Ames, IA, West Lafayette, IN, Urbana, IL, and Mead, NE. A few entries that performed well at all four locations include Regenerate, Raptor III, W41 and Reflection. Tolerance to stresses such as traffic, shade,
drought and brown patch are being evaluated throughout the testing period. Grey leaf spot (Magnaporthe oryzae) is also being noticed more on tall fescue, and for the first time, it was evaluated on this trial. Data collected at our Raleigh, NC, location, although interesting and with good separation among the scores, was not statistically significant in 2017. Intensive traffic was applied on the tall fescue
trials at North Brunswick, NJ, and Knoxville, TN, in 2017. As with the previous years and trial locations, year five data showed very little statistical differences among entries. Data from evaluations conducted in shade at Carbondale, IL, demonstrated the greatest differences among entries than in any year of the trial. Rowdy, Titanium 2LS, Annihilator, ATF 1612, GTO and Michelango were the only entries in the top turf quality statistical group under the shade stress in Carbondale. Data from Logan, UT, on a trial where irrigation
is reduced, showed moderate statistical significances with separation of the top 50 percent of entries. Fayette, IS-TF 272, Firewall and IS-TF 311 earned the highest overall quality scores at the Logan, UT, reduced irrigation trial site. Brown patch is typically the
most prevalent disease on tall fescue, but in 2017, only a few locations noted and rated the disease. At Wichita, KS, Paramount, Leonardo and PPG- TF-169 had the highest tolerance ratings (5.7) but very little statistical significance was noted. Te Adelphi, NJ, location rated brown patch also in 2017 with data ranging from 7.7 to 1.0 (scale is 1-9, 9=no disease). Entries with the highest brown patch rating at Adelphia include Tor (7.7), Maestro (7.3), and Screamer LS (7.3).
TPI Turf News July/August 2018 45
Perennial Ryegrass Perennial ryegrasses are occasionally used in
sod mixtures because of positive attributes such as fast germination, better establishment under low and high temperatures and traffic tolerance. A new trial of perennial ryegrass, established in 2016, consists of 114 entries, of which most are new experimentals. Te first data from this trial (2017) is now available on our website. Data from 2017 did not show large entry
differences when averaged over LPI groups. Entries such as PPG-PR 424, PPG-PR 331, PPG-PR 420, PPG-PR 421, Furlong, NP-2, and Silver Sport finished in the top statistical group for turf quality in both LPI groups. When analyzed by geographic region, several entries, including Furlong, PPG-PR 420, PL2 and PPG-PR 419 had turf quality ratings in the top statistical groupings for all regions. Data was also analyzed by three management
regimes. High, medium and low maintenance schedules (A, B and C) approximate a golf course fairway, athletic field and home lawn, respectively. Several of the same entries that performed well in the different geographic regions also performed well under all three maintenance regimes, including NP-2, Furlong, PPG-PR 423, PPG- PR 424, PPG-PR 371, PPG-PR 420 and PPG-PR 331. Other entries that finished in the top turf quality statistical group under all three regimes include DLFPS-236/3554, Xcelerator and PL2. Drought tolerance was tested at Logan, UT,
in 2017, alongside a standard irrigation trial regime. Statistical differences were not large among entries, but DLFPS-236/3554, DLFPS-236/3542 and Savant scored particularly well in both normal and drought irrigation trials. Other entries that performed well under the drought scenario include PST-2CRP, BAR LP 6164, DLFPS-236/3547, LPB-SD-104 and Mensa.
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