Common bermudagrass (Cynodon dactylon) and hybrid bermudagrass are the most common turfgrasses used on athletic fields in the transition zone [a zone extending through the central part of the United States in which the winters are too cool for warm-season turfgrasses and the summers are too warm for the cool-season turfgrasses (Christians, 1998)] because of its recuperative potential and ability to tolerate high temperature extremes during summer (McCarty et al., 2005). Turfgrass breeders regularly develop experimental bermudagrasses for improved performance. One such variety, TifGrand (previously experimental line ST-5 and Tift No. 4), was recently developed to offer improved shade tolerance compared with hybrid bermudagrass varieties such as Tifway and TifSport (Baldwin et al., 2008; Hanna et al., 2010). Although turfgrass breeders thoroughly evaluate the quality, density, color, disease resistance, and cold tolerance of these experimental bermudagrasses before introducing them into the marketplace, information on the traffic tolerance of these selections is often limited (W.W. Hanna, personal communication).
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