locations. Anthracnose was rated at North Brunswick, NJ, with Nightlife, Kingdom and 777 showing the highest tolerance ratings. Pink snow mold ratings were again collected at the California Club in San Francisco. 2017 data was consistent with previous results with 777 finishing atop the pink snow mold tolerance ratings.


Fairway/Tee Trial Te 2014 trial consists of fourteen creeping and


three colonial bentgrass entries and is planted at nineteen locations. Tird year data (from 2017) is normally a reflection of thatch development as well as a response to various diseases. As with 2016 data, entry differences in 2017 were


less than expected at several locations, with very little to no statistical differences in turf quality averages noted at four locations. However, good entry separation was noted at six locations with creeping bentgrasses Nightlife, Chinook and Kingdom as some of the highest rated entries. Past top creeping bents 007 and Crystal Blue Links are the entries that any new experimental needs to outperform, and these new entries, as well as Piranha, Armor and L93-XD looked impressive at several locations in 2017.


In 2017, creeping bentgrasses generally


outperformed their colonial bentgrass cousins. However, colonial bentgrass entries showed excellent performance at selected sites. For example, colonial bentgrass previous top performer Greentime was outperformed by Musket and DLFPS-AT/3026 at College Park, MD, in 2017, where dollar spot resistance seemed to help these entries compete with creeping bent entries. It seems that where the colonial bentgrasses are well adapted, they perform very well. Where colonial bentgrass does not seem to be well adapted, like the mountain west or southwestern states, those entries fall into the bottom 25 percent of all entries. Te Riverside, CA, location utilized a reduced


irrigation level but no significant differences were again noted among the entries. However, the Logan, UT, and Fargo, ND, locations managed under reduced irrigation showed very good entry separation with Kingdom, Shark, Piranha and Crystal Blue Links performing well at both sites. At two ancillary traffic locations, Amherst,


MA, and Blacksburg, VA, significant entry separation was noted. Colonial bentgrasses DLFPS-AT/3026 and Musket were excellent under the traffic stress at both sites, finishing in the top statistical group for turf quality. Traffic tolerance ratings, evaluated three times at the Amherst, MA, site, however, showed Kingdom, Piranha and Nightlife with some of the highest scores. Disease resistance is a very important trait for


bentgrasses used on fairways or tees. Brown patch, anthracnose and dollar spot were rated in 2017. Brown patch data collected at Ames, IA, showed only Musket with any significant disease development. Anthracnose was noted at North Brunswick, NJ, and data showed


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DLFPS-AT/3026, Musket, Greentime and PST-0CV6 with the least disease. Dollar spot data again showed the colonial


bentgrasses DLFPS-AT/3026 and Musket with some of the best ratings at three locations. Creeping bentgrass entries Chinook and Piranha also showed excellent dollar spot tolerance across the three locations.


Low Input Cool-Season In 2015, NTEP established its first


management based trial, with seventeen locations that manage under ‘low input.’ Te first trial of this type includes cool-season grass cultivars, experimentals, blends and mixtures of grasses and other species. Tirty-two entries were submitted by sponsors, including single cultivars and blends of Kentucky bluegrass, fine fescue, tall fescue and perennial ryegrass; mixtures of several grass species, with some including strawberry, white or Microclover® (Trifolium spp.); and even a western yarrow entry (Achillea millefolium L.). Management is minimal for the five-year


trial, with no fertilizer applications or irrigation after establishment, no pest control at any time during the trial, and mowing at 3 – 3.5” on the thirteen standard trial sites. Tree ancillary trial sites evaluate the effect of one annual grass pre-emergence application (spring 2016) only, then following standard trial protocols for the remaining four years of the trial. One additional trial location (West Lafayette, IN) made an additional fertilizer application on one half of each plot for 2016 and 2017 only, to evaluate the effect of the small increase of fertilizer on performance and survival. Overall, these locations are maintained very minimally, which is of interest to an increasing number of our customers. As first year data typically reflects establishment,


second year data from any NTEP trial is the first year to evaluate more long-term performance. Te entries in this low input trial, with no annual grass or broadleaf weed control, need excellent establishment, and then good ground cover to resist weed invasion and deliver good quality. With many different species, mixtures with


clovers and even non-grasses (western yarrow), turfgrass quality ratings are more difficult to assess, sometimes leading to less significance among entries. However, turfgrass quality ratings collected in year two resulted in larger differences among the entries. Data was reported from fifteen locations in


2017. Te following entries were the most consistent, finishing in the top statistical group at ten locations: Yaak, the western yarrow entry, DLFPS TFAM, a tall fescue mixture with Microclover®, DLFPS TFAStC, a tall fescue mixture with strawberry clover, Vitality Double Coverage Mixture, a 90/10 Tall fescue/ Kentucky bluegrass mixture, CRS Mix #2, a hard


TPI Turf News July/August 2018


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