good entry separation as DALZ 1714, FZ 1368, DALZ 1802, and FAES 1319 finished with the highest ground cover scores after eight weeks of traffic. Shade tolerance was tested at College Station, TX, but less entry separation was noted as compared to 2020. FZ 1410, DALZ 1808, and DALZ 1311 were the highest scoring grasses under shade, however, more than twenty other entries fell in the top statistical group. Te Dallas, TX, site evaluated performance under
Species-specific trials, such as this zoysiagrass trial pictured, often show marked differences in performance characteristics.
Our latest zoysiagrass trial, established at nineteen
locations in 2019, consists of thirty-nine (39) vegetative entries, almost all experimental. Tese new entries are demonstrating how far zoysiagrass breeding and development has advanced in the last few years. At least some of these new experimentals are destined for commercialization within the next few years, which is exciting news for the future of zoysiagrass use and adaptation. Turfgrass quality ratings collected in 2021 reflected
a full year of performance after establishment. Data from Southeast U.S. locations, including Griffin, GA, Fayetteville, AR, and Auburn, AL, showed many promising experimental zoysias. Entries, such as FZ 1727, FZ 1723, FZ 1722, and FAES 1319 were good performers at these sites. Florida locations, which represent a huge potential
market for zoysia, delivered data that included many new top-performing entries as well. Excellent grasses at Ft. Lauderdale, FL, include FAES 1319, 16-TZ-12783, FZ 1440, FZ 1727, and FZ 1732. Te Gainesville, FL, site entries that performed well were FZ 1732, DALZ 1613, and FZ 1722. Te trial at Jay, FL, had several new entries with high turfgrass quality ratings but with no statistical significance among the entries. Data from Transition Zone locations in Raleigh,
NC, College Park, MD, West Lafayette, IN, and Manhattan, KS, also showed significant improvement in performance of new entries such as DALZ 1808, DALZ 1707, and FAES 1319. Te Columbia, MO, and Stillwater, OK, locations had the standard entries Emerald and Zeon as top performers, but add to that list newcomers such as DALZ 1707, DALZ 1701, and FAES 1319. Top performers at our only western U.S. location, Riverside, CA, were new names FAES 1335, DALZ 1802, and DALZ 1807. Ancillary trials of traffic, drought, and shade
tolerance were initiated in 2020 and continued in 2021. Second-year data from Raleigh, NC, again ended with
TPI Turf News July/August 2022
Warm-Season Putting Green In 2013, the U.S. Golf Association (USGA) co-
funded a trial with NTEP to identify warm-season grasses that can provide acceptable putting surfaces where course owners want to save water, and pesticide and fertilizer inputs. Tat trial included not only bermudagrass, but also zoysiagrass and seashore paspalum. Seashore paspalum has been utilized on putting greens for the last decade or so, but zoysiagrass has almost no history as a putting green surface in the U.S. (zoysia has been a mainstay of ‘summer’ putting greens in Japan for decades). Including three different species in one trial offered challenges, particularly in management specifics that may differ from one species to another.
Te 2013 trial is complete and a new trial
containing nineteen entries (nine bermuda, six zoysia, and four seashore paspalum) was established at ten locations in 2019. Data from the second year (2021) is now available, with data being reported by location and not summarized over all locations. Data from 2020 showed significant differences
in establishment, genetic color, leaf texture, and density. Differences were also noted in spring greenup, fall color retention, and seedhead production. Entries were mostly well established in 2021 so data performance reflects putting green mowing height and maintenance. Tus far, several zoysia entries have been excellent,
outperforming many bermudagrass entries. FZ 1710, FZ 1717, and FZ 1714 zoysia were top performers in Riverside, CA, Griffin, GA, Mississippi State, MS, and College Station, TX. DALZ 1814 and DALZ 1815 zoysia were high ranking entries at Jay, FL, Mississippi State, MS, and College Station, TX. DALZ 1814 was also excellent at the Columbia, MO, location, while DALZ 1815 finished at the top of turf quality ratings at Las Cruces, NM. Overall,
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drought (reduced irrigation) with DALZ 1601 and FAES 1319 at the top (turfgrass quality mean = 7.9), followed by DALZ 1714 (TQ=7.8), DALZ 1311, and DALZ 1713 (TQ=7.6). Tese entries were not only able to maintain quality during the induced drought, but were also some of the better entries to recover following re-watering. Interestingly, winter injury was significant at the Dallas site, with entries such as DALZ 1601, FAES 1319, DALZ 1311, and DALZ 1707 at <2.0 percent kill, and Meyer at 80 percent kill (LSD=21.9).
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