NTEP 2013 Zoysia trial under artificial shade at Riverside, CA.
noted at Lexington, KY, with Patriot, Tahoma 31 and Tifway topping the traffic ratings. And in spring dead spot (Ophiosphaerella spp.) ratings collected at Columbia, MO, OKC 1163, OKC 1302, BAR C291, Astro, MBG-002 and Yukon showed the highest tolerance ratings.
Tis is the final year of data from our water use
reduction ancillary trial conducted at College Station, TX. Performance differences evaluating drought tolerance have been significant in each prior year. TifTuf, FAES 1325 and JSC 2-21-18-v were the top performing entries in 2017, with turf quality ratings of 7.3, 6.9 and 6.9, respectively, where scores ranged all the way down to 4.8.
Zoysiagrass Meyer zoysiagrass was released in the early
1950’s and has been a standard in the industry ever since. Meyer is known for its medium leaf texture (for a Zoysia japonica type) and excellent winter hardiness. Zeon is a Zoysia matrella type that is finer textured than Meyer. Zeon is a standard for use on golf course fairways and tees because it can develop a dense turf at mowing heights of 0.5” or lower. Both grasses are included in this new trial as standard entries. One of the weaknesses of zoysiagrass is its rate
of establishment, especially compared to other warm- season species. Terefore, plant breeders are working to improve spread and recovery rate in zoysiagrass. For
TPI Turf News July/August 2018
both of these traits, it appears that breeders are making considerable gains. In addition, Meyer historically has not performed particularly well in the warmer southeast and southwest locations, therefore zoysia cultivars that perform well in those regions are much needed. As with the bermuda trial, injury in the winters
of 2013-14 and 2014-15 significantly affected some locations. Winter injury was evident at Manhattan, KS, West Lafayette, IN, and Columbia, MO, with turfgrass quality and percent cover ratings being affected by that injury. Meyer and KSUZ 1201 suffered only a small amount of winter kill at those locations (only 1.3 and 9.7%, respectively at Manhattan, KS). Te two winters damaged DALZ 1301 and FAES 1305 more, however, they recovered enough to provide quality almost equal to Meyer and KSUZ 1201 at the three northern locations. Since then, entries such as FAES 1312, DALZ 1301, FAES 1305 and 11-TZ-4321 have continued to recover and are now providing good to excellent quality at the northern locations, along with KSUZ 1201. For so long, Meyer was the standard for winter tolerance, and therefore, the primary cultivar in use in the northern and transition zone states. However, with these new experimentals, Meyer may finally be replaced in this region. With 2017 as the final year of this trial, zoysia
entries that have survived two rough winters, plus two more normal winters have risen to the top at the northern sites. DALZ 1301 and FAES 1305 finished
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