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of St. Augustinegrass in many locations. Winter kill was rated at three locations, and ratings were lowest (i.e., winter survival was best) for UGA/TX SA26, DALSA 1502, and Palmetto. Fall color retention is also an important


characteristic, particularly in southern regions where turfgrasses are expected to provide green turf for eight months or more. CitraBlue and FSA 1606 showed consistently good fall color, even as the temperatures dropped in fall. Other entries with good fall color retention include FSA 1605, FSA 1601, FSA 1610, and FSA 1604.


Seashore Paspalum Seashore paspalum is known for its salt tolerance,


however turf managers are now considering paspalum for its unique turfgrass quality as well. NTEP initiated testing of seashore paspalum in 2007. Eight new entries plus two standards are included in the current seashore paspalum trial, planted at eight locations in 2016. Data from the five years of the trial has now been


summarized and is available. Summarized turfgrass quality data from 2016-2020 showed that good progress has been made by breeders as several new experimental entries are performing well. In 2017, only UGP 73 finished in the top statistical turf quality category in each LPI Group. Data from 2018 had UGP 94, Salam, Sea Isle 1, and UGP 73 as overall top performers. Two of the three LPI groups in


2019 did not show large statistical significance, however we can note that UGA 1743, UGP 94, and UGP 73 finished as top performers in all groups. For 2020, at most locations in the final year of the trial, small or little statistical significance of overall turf quality ratings was noted among entries. SeaStar did however, finish at or near the top of turf quality average scores at four of the six locations. UGP 73 was consistently good at four locations as well. Te greatest performance difference was observed at Auburn, AL, with UGP 94, SeaStar, and UGA HYB2 alone in the top statistical group. Ancillary trial locations testing winter kill and


traffic tolerance were established and evaluated. Our northernmost location, Fayetteville, AR, rated winter kill as UGP 73 and UGA HYB2 exhibited the least kill (9.2 and 14.2 percent respectively; range is 9.2 – 65.8 percent; LSD=10.4). Traffic tolerance was evaluated at College Station, TX, in two growing seasons. UGA SR15-15, UGA SR15-14, UGP 73, SeaStar, UGA 1743 and UGP 74 delivered the highest quality ratings under traffic stress. Dollar spot was the disease rated on this trial


in 2017-2019, however no statistical difference among entries was noted. Fall color retention was rated by several locations but only small differences were noted among entries. And finally, establishment rate was evaluated in the first year of the trial. Salam had the highest percentage establishment at four of the five reporting locations.


TPI Turf News July/August 2022


49


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