SportsTurf provides current, practical and technical content on issues relevant to sports turf managers, including facilities managers. Most readers are athletic field managers from the professional level through parks and recreation, universities.
Issue link: https://read.dmtmag.com/i/37461
FieldScience Continued from page 14 ❯TOP PERENNIAL RYEGRASSES Affinity BAR LP 4920 Barlennium Brightstar SLT Citaion Fore D04-LP05 DP 17-9788 Hawkeye 2 Palmer III Panther GLS Pinnacle Plateau Silver Dollar ASP 6004 ASP 6005 ASP 6006 Chivalry Charismatic II GLSR Cutter II Chivalry Firebolt Kokomo II Nexus XR Palmer IV Pick 02-R Pizzazz Uno FOR SELECTED TRAITS, 2005-2009 NTEP TRIAL DATA Traffic Tolerance Traffic Tolerance Traffic Tolerance Grey Leaf Spot Tolerance “N. Brunswick, NJ” “Mead, NE” “Puyallup, WA” Four location average Allstar 3 Derby Xtreme Exacta II GLSR Derby Xtreme Fiesta 4 Edge II Fiji Zoom Homerun Palmer IV SR 4600 Uno 1G Squared Charismatic II GLSR Allstar 3 Chivalry Apple GL Dart Dasher 3 Defender Exacta II GLSR Fiesta 4 Line Drive GLS MMW Paragon GLR Revenge GLX Soprano SR 4600 Uno “NOTE: Ryegrasses are listed alphabetically and are either the top 15 entries for that year/location, or all of the entries “ in the top statistical grouping. Numbered entries are often still experimental and not yet commercially available. “N. Brunswick, NJ - data is from wear applied in Sept. 2009 only and reflects recovery from wear 43 days after application.” “Mead, NE - Traffic was applied regularly throughout each growing season. The rankings are based on the mean “ of monthly turf quality ratings. “Puyallup, WA - Traffic was applied with twelve passes per week using a Brinkmann simu- lator, applied for eight weeks each “ in spring and fall. Ranksing are based on the mean of monthly turf quality ratings. “Grey leaf spot - was evaluated at W. Lafayette, IN, College Park, MD, N. Brunswick, NJ and Adelphia, NJ.” fall 2010, and new data is not yet available. Therefore, we must consider the four years of data compiled and summarized from our 2004 trial of perennial ryegrass. The 2005- 2009 data show many new grasses with im- proved quality compared to the top performers in the previous NTEP trial, ‘Mach I’ and ‘Pizzazz’. Grey leaf spot is a potentially devastating disease of perennial ryegrass that can destroy entire turf stands in a short period of time. Several locations submitted data on grey leaf spot during the testing period. Statistically significant performance differences were ob- Grey leaf spot is a potentially devastating disease of perennial ryegrass that can destroy entire turf stands in a short period of time. 34 SportsTurf | August 2011 served with some of the top performers being ‘Fiesta 4’(9.0 rating, scale is 1-9; 9=no disease), and ‘Exacta II GLSR’, ‘Soprano’, ‘SR 4600’, ‘Dasher 3’, ‘Defender’ and ‘All- star 3’ (all having an 8.9 rating). Traffic tolerance of the perennial ryegrass entries was evaluated at several locations over the four year test period. In the final sum- mary, very few differences were noted at the Ithaca, NY and East Lansing, MI traffic sites. The Mead, NE trial (using a Brinkman) finished with a large group of en- tries in the top statistical group, led by ‘Chivalry’. The Puyallup, WA location, also using a Brinkman unit, showed the largest cultivar separation in turf quality averaged over the four years, with eleven entries in the top group, led by ‘Uno’, Derby Xtreme’ and ‘Zoom’. Overall wear tolerance ratings, aver- aged over the Amherst, MA and North Brunswick, NJ sites, have ‘Keystone 2’ in the top spot. However, about 50 entries per- formed statistically equal to ‘Keystone 2’. BERMUDAGRASS Our latest bermuda trial, established in 2007, contains 25 seeded entries and six veg- etative entries. Many of these entries are ex- perimental cultivars or new commercial cultivars. NTEP evaluates warm-season grasses by comparing seeded and vegetative entries, and also by separately comparing seeded vs. seeded and vegetative vs. vegeta- tive. The Fayetteville, AR location applied traffic in summer and fall but fewer statisti- cal differences were observed than at that the Raleigh, NC location. The Raleigh, NC trial evaluated wear tolerance in seven rating dates through August and September. ‘Lati- tude 36’ was at the tops for wear tolerance ratings at six of the seven rating dates, with each rating finishing well within the top sta- tistical grouping. The only other entries to finish in the top statistical group for each rating date were ‘North Bridge’, ‘Premier’ and ‘Tifway’. Entries were tested for the third consecu- tive year under the saline irrigation treat- ment (SAR=5.41) imposed at Las Cruces, NM. ‘Tifway’, the highest turf quality per- former in 2008 and 2009, was the highest scoring entry again in 2010 with the vegeta- tive entries ‘Latitude 36’ and ‘North Bridge’ www.sportsturfonline.com