Bentgrass New trials of bentgrass were
established in fall 2014, with the first data being released in spring 2016. Two species are included in the latest trials: creeping (Agrostis stolonifera) and colonial (Agrostis tenius). First year data (from 2015) is presented here, although it should be considered with caution since results may change with further testing.
Putting Green Trial Tis trial, containing
Te Motz group installed Tifway bermuda sod, grown by Carolina Green, at M&T Bank Stadium, home of the NFL’s Baltimore Ravens. Te Ravens removed their existing synthetic turf surface and replaced with natural turf at the request of their players.
quality statistical group at both locations. At the Amherst, MA, (lawn height) location some of the same entries were top finishers, however, several other entries performed well also, indicating that mowing height may have a significant impact on cultivar performance. Fairway maintenance levels, particularly in regions
where fine fescues may suffer heat and drought stress, is being evaluated in this trial. Te West Lafayette, IN fairway maintenance trial did not show large significant performance differences among entries in 2015. Te same can be said for the trial located at the California Golf Club of San Francisco, where fine fescues are already in use. Tese two locations obviously differ greatly in climate, therefore, it will be interesting to see if these results hold, or change over time. As noted above, diseases were rated at several locations
in 2015, most likely contributing to quality score variability. Diseases such as red thread, pink snow mold and dollar spot are occasionally seen on fine fescue, and these three were rated at one location each. Leaf spot and/ or melting out (Bipolaris, Drechslera, or Exserohilum sp.) are additional troublesome diseases, and these were seen at Columbia, MO, Adelphia, NJ and New Brunswick, NJ in 2015. Tere was significant variation among the sites, even within the two New Jersey locations. For instance, 7H7 hard fescue had one of the highest leaf spot ratings at Adelphia, NJ, but was below the top statistical group in leaf spot ratings collected at New Brunswick, NJ. Melting out ratings collected at Columbia, MO showed 7H7 in the bottom 25 percent of entries. Melting out is caused by several unique species, however the leaf spot damage in New Jersey could have been also caused by different organisms, which would explain the variable results seen with 7H7 and other entries.
TPI Turf News July/August 2016
twenty creeping bentgrasses, was established at nineteen locations. Turfgrass quality ratings collected during the first year showcased many
promising new experimental cultivars. Previous top performers Declaration, V-8, Penn A-1 and Luminary were often outperformed by new entries such as 777, DC- 1, DLFPS-AP/3018 and PST-ROPS. In addition, the commercial cultivars Kingdom, Barracuda, Shark and Nightlife delivered good quality at selected locations in 2015, along with V-8, Declaration and Luminary. 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, GDE and DLFPS-AP/3018 were the only entries to finish in the top turf quality grouping at all three locations. At L.A. Country Club, PST-ROPS had the highest quality average in 2015; in San Francisco, Pure Select, Kingdom and L-93XD were the outstanding cultivars. And at North Shore Country Club, 777 and GDE top the quality rating average. As with the previous trial, wear tolerance evaluations
were conducted at the Amherst, MA, location 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 this first year, GDE, Kingdom, Barracuda and DLFPS-AP/3059 showed the best traffic tolerance, along with six other entries. 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 2015, dollar spot was noted and rated at several locations. L-93XD had the highest dollar spot average rating at the three locations reporting data. Other entries including DLFPS-AP/3018, Barracuda and PST-ROPS also rated high for dollar spot tolerance. Other important diseases such as brown patch and pink snow mold were rated in 2015, but very little statistical significance was noted.
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