Data from Transition Zone locations in West
Lafayette, IN, Manhattan, KS, and College Park, MD, also showed significant improvement in the performance of new entries, providing winter tolerant alternatives to Meyer. Entries that performed well at all three locations include not only standards Zeon and Emerald, but also DALZ 1701, DALZ 1707, FAES 1319, FZ 1422, and DALZ 1808. Top performers at our only western U.S. location, Riverside, CA, were new names DALZ 1802, FZ 1722, and UGA GZ 17-4. A key factor for adoption of zoysiagrass is winter
survival in the most northern U.S. locations. Winter injury was recorded at both West Lafayette, IN, and Dallas, TX. In Indiana, DALZ 1701, DALZ 1808, DALZ 1707, Zeon, and Meyer suffered the least winter injury in 2023. At Dallas, Emerald, FZ 1422, DALZ 1707, and Zeon all showed less than 20 percent winter injury in the last year. Ancillary trials of traffic, drought, and shade
tolerance were initiated in 2020 and continued in 2023. Fourth-year data from Raleigh, NC, again ended with excellent entry separation as FZ 1368 and DALZ 1802 finished with the highest ground cover scores after eight weeks of traffic. Shade tolerance was tested at College Station, TX, but similar to the last two years, in 2023 less entry separation was noted as compared to 2020. FAES 1319, DALZ 1311, DALZ 1713, DALZ 1714, 16-TZ- 12783, FZ 1422, and FZ 1727 were the highest scoring grasses under shade, however, about thirty other entries fell in the top statistical group.
Te Dallas, TX, site evaluated performance under
drought (reduced irrigation) with Emerald, DALZ 1409, Zeon, DALZ 1601, DALZ 1713, and UGA GZ 17-4 with the best turfgrass quality scores. 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.
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, 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 has been replaced by a new trial
containing nineteen entries (nine bermuda, six zoysia, and four seashore paspalum) that was established at ten locations in 2019. Data from year four (2023) is now available, with data being reported by location and not summarized over all locations.
TPI Turf News July/August 2024
57
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