and Piper creeping bentgrasses finished in the top statistical group. Entries with the poorest performance under all three replacement levels include Navigator III strong creeping red fescue, Helios and SR 4650 perennial ryegrass, and Penncross creeping bentgrass. Finally, in Ft. Collins, CO, data revealed several of


the fine fescues outperforming many of the bentgrasses, and in particular, the best performing entries from St. Paul and West Lafayette. PPG FRC 127 chewings fescue, Navigator III strong creeping red fescue, and DLF-AP-3084 creeping bentgrass scored highest under 50 percent ETo


irrigation


replacement, with Gladiator hard fescue, Helios perennial ryegrass, and Oakley, Penncross, and AU Victory creeping bentgrass finishing in the top turf quality statistical group. In turf quality ratings collected under 65 percent ETo


irrigation


replacement, Navigator III, Compass II, PPG FRC 127, and SR 4650 were the only entries finishing in the top statistical group. In all the turf quality data, even under optimum irrigation replacement (80 percent ETo


7.0+ ratings were collected. Other Species


), very few


Other cool-season species, such as prairie junegrass


(Koeleria spp.), tufted hairgrass (Deschampsia cespitosa), rough bluegrass (Poa trivialis), supina bluegrass (Poa supina) and annual bluegrass (Poa annua) are potential sod products, although limited in their utility and geographical area of adaptation. Native species, such as junegrass and tufted


hairgrass, under low maintenance, can form a dense sward with an appearance somewhat like perennial ryegrass or Kentucky bluegrass. One tufted hairgrass cultivar has been tested by NTEP (1998 NTEP Fineleaf Fescue trial). Te other bluegrass species, rough, annual, and supina are still very much under development without a lot known about their performance characteristics and production needs. Other native species, such as inland saltgrass (Distichlis spicata) and poverty grass (Danthonia spicata), have special traits such as salt tolerance (inland saltgrass) or tolerance to infertile soils (poverty grass), but are probably several years away from commercialization.


Te continued post-Covid surge in golfing has led to many golf course renovations often incorporating NTEP-proven grasses. Photo by Steve Trusty TPI Turf News July/August 2024 55


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