trial locations did not establish properly, or were set back by the winter of 2013, therefore, only a small amount of quality, density, disease and ball roll data could be collected during the first two years. Te winter of 2014- 15 was also colder than normal in some locations, which delayed some entry development and hence, collection of some of the more advanced data parameters. Also, various issues led to the unfortunate abandonment of the trial at Tequesta, FL. Tis trial is now complete and data from
2013-2017 has been summarized into a final report. Data was reported by location and not summarized over all locations. However, in reviewing individual sites, some trends are evident. For instance, significant differences were noted in establishment rate with the two bermudagrass entries from Mississippi State University, MSB-264 and MSB-285 exhibiting consistently faster establishment than many other entries. For zoysia, several entries had establishment rates
faster than the standards Meyer and Zeon. At Jay, FL, Empire (90.0 percent), FAES 1307 (81.7 percent) and FAES 1314 (78.3 percent) had statistically significant faster cover than Meyer (41.7 percent) and Zeon (43.3 percent). Early ratings from Auburn, AL, showed FAES 1314 with 40.0 percent cover, while Meyer and Zeon had only 11.7 and 10.0 percent respectively. In addition, the Manhattan, KS, site had FAES 1307 (91.7 percent) at the top, followed closely by FAES 1329, Empire, and GGZ 504 at 88.3 percent. In Manhattan, KS, establishment ratings of Meyer (61.7 percent) and Zeon (55.0 percent) were significantly lower. Turf quality ratings vary considerably by location
for this trial, but entries like MSB-264, 08-T-18, OKC- 13-78-5 and MSB-285 bermuda showed good performance by finishing in the top statistical group at several locations. Differences in appearance ratings such as genetic color, density and leaf texture were noted among entries, which largely led to the quality ratings separation. Interestingly, fall color retention ratings showed significant differences, but they varied by location. MSB-264 and MSB-285 showed good fall color retention at several locations. For zoysia, DALZ 1308 was probably the most
consistent performer with top turf quality averages at most of the eleven trial locations over the testing period. Te two seashore paspalum entries, SeaDwarf and UGA 1743 performed similarly for turf quality at most locations. Also, as expected, both seashore paspalum entries died at the northern locations of Lexington, KY, and Bloomington, IN, and did not perform well at the Richmond, VA, location. Ball roll measurements were collected at most
locations over several years. Since the goal of the trial was to deliver moderate ball roll distances with lower maintenance regimes, we determined our minimum threshold to be 100 inches of roll (250 cm) using the stimpmeter. Tucson, AZ, Richmond, VA, and Mississippi
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Te 2018 NTEP Low Input Warm-Season trial recently planted in College Station, TX.
State, MS, were the only locations to consistently measure ball roll distances of at least 100 inches on any entry. Te bermuda entries Mini-Verde and CTF-B10 were the only two entries to consistently deliver 100-inch ball rolls at those three locations. Zoysiagrass and seashore paspalum entries rarely showed 100-inch ball roll distances. However, zoysia entry 10-TZ-74 did measure 100 inches or more on several dates, with DALZ 1308 rolling 100 inches on a few rating dates. Terefore, either these entries did not adequately provide the surface necessary for consistent speeds under lower maintenance, or maintenance regimes need to be re-evaluated and adjusted to improve putting speed performance. St. Augustinegrass and seashore paspalum
cultivar development was fairly limited in the U.S. for a long while. Te situation changed in the early to mid- 2000s when new plant breeders were hired at southern universities like Texas A&M, University of Florida and North Carolina State University. Now, with those folks in place and with a major federal (USDA) grant from the Specialty Crop Research Initiative (SCRI), an increase in breeding of these two species, along with bermuda and zoysia, is occurring across the southern U.S. Within a few years, growers and consumers will see new cultivars of St. Augustinegrass and seashore paspalum in the marketplace.
TPI Turf News July/August 2019
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