At the Amherst, MA, (lawn height) location
the best entries for both wear tolerance and turf quality included the hard fescues Beacon and Jetty. Castle and Sea Mist were not as strong for wear tolerance at Amherst but they still finished with high turf quality ratings. At North Brunswick, NJ, the best entries were mainly hard fescue led by Jetty, Resolute, Gladiator, Minimus and Sword. Contrast these results to the results from the Storrs, CT, site as Castle and Sea Mist were top turf quality performers in Storrs, but Beacon, Jetty and other hard fescues were not. Fairway maintenance levels, particularly in
regions where fine fescues may suffer heat and drought stress, is being evaluated in this trial. Sites as diverse as West Lafayette, IN, E. Lansing, MI, St. Paul, MN, and the California Golf Club of San Francisco showed varying results across locations, however with some agreement. Compass II, Sea Mist, RAD-FC44 were the only consistently good entries at all sites. Several diseases were rated on this trial in 2017.
Red thread (Laetisaria fuciformis) was rated at three locations in 2017, with entries such as Jetty, Gladiator, Beacon, PST-4BND and MDHD-14 performing consistently well across all three locations. Pink snow mold (Microdochium nivale) was rated at the California Golf Club with BAR FRT 5002, Beudin, C14-OS3, DLFPS- FL/3060 and Resolute showing the best tolerance. Dollar spot and brown patch can be persistent
and troublesome diseases on fineleaf fescues and both of these diseases were noted and rated in 2017. Dollar spot was noted at five locations, with entries such as Quatro, Compass II, Castle, C14-OS3, RAD-FC44 and DLF-FRC 3338 showing consistently good results across locations. Brown patch was rated twice at Raleigh, NC, with the hard fescues Gladiator, Beacon, Beudin and Minimus demonstrating the best tolerance.
Bentgrass New trials of bentgrass were established in fall
2014, and the first data was released in spring 2016. Two species are included in the latest trials: creeping (Agrostis stolonifera) and colonial (Agrostis tenius). Tird year data (from 2017) is presented here, although it should be considered with caution since results may change with further testing.
Putting Green Trial Tis trial, containing twenty creeping bentgrasses,
was established at nineteen locations. Turfgrass quality ratings collected in 2017 again revealed several experimental cultivars that can meet, or exceed the quality delivered by previous top performers Declaration, V-8, Penn A-1 and Luminary. Entries such as PST-ROPS, DLFPS-AP/3058, Piranha, DLFPS-AP/3018 and L93-XD delivered top turf quality at several sites, but fell off at other sites. For instance, L93-XD was excellent in Lexington, KY, East Lansing, MI, North Brunswick,
TPI Turf News July/August 2018
NJ, and St. Paul, MN, but finished near the bottom of entries at Athens, GA. In some cases, entries were superior to a standard entry such as Declaration at a particular location, but not another location. Tese results emphasize the need to check local results carefully. Tis trial was also evaluated at three golf course
sites: Los Angeles Country Club in California, the California Golf Club of San Francisco and North Shore Country Club in Glenview, IL. 777, PST-ROPS and DLFPS-AP/3054 finished with high turf quality at all three locations. Again in 2017, as with 2016, L-93XD showed excellent performance at both of the California sites, but finished at the bottom of all entries at the Chicago site. Additionally, Tour Pro was a top performing entry at the North Shore site, but finished in the middle of the pack at both California sites. As with the previous trial, wear tolerance
evaluations were conducted at the Amherst, MA, location, starting in 2015. Tis location imposes wear by dragging a stiff brush across the plots. Tis action causes bruising and abrasions that mimic different types of damage. In 2017, DLFPS-AP/3018, L93-XD and PST-ROPS showed the best overall quality, finishing in the top statistical group. Kingdom, Piranha and Tour Pro exhibited excellent wear tolerance in three ratings. An additional ancillary trial was established at
Logan, UT, where entries were managed both under traditional irrigation and a reduced irrigation regime. Consistent with 2016 data, in 2017, most of the top entries under normal irrigation levels were also good under the reduced irrigation level. Te entries ending in the top statistical turf quality group under both regimes in 2017 include Kingdom, Pure Select, Nightlife, 777, DLFPS- AP/3018, DLFPS-AP/3058, Armor and PST-ROPS. Bentgrasses are susceptible to many diseases,
therefore, disease resistance has always been an important feature of any new bentgrass cultivar. Dollar spot is one of the most damaging diseases on bentgrass and in 2017, dollar spot was noted and rated at multiple locations. L-93XD, Declaration, DLFPS-AP/3018, DLFPS-AP/3058, Luminary, GDE and Barracuda had consistently high dollar spot tolerance ratings across
Differences in bentgrass color and texture at Logan, UT. 47
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