COLD TOLERANCE OF ‘TIFTON 419’ BERMUDAGRASS AS AFFECTED BY LATE-SEASON NITROGEN APPLICATIONS AND TRINEXAPAC-ETHYL (Primo)
نویسندگان
چکیده
Hybrid bermudagrasses occasionally suffer significant damage when below-normal winter conditions occur. In an attempt to enhance cold tolerance of these grasses, a study was undertaken to assess the effects of late-season nitrogen (N) fertilization and applications of the growth regulator trinexapac-ethyl (Primo) on morphology and cold tolerance of ‘Tifton 419’ hybrid bermudagrass. Nitrogen applications after 15 August significantly enhanced the number of total rhizomes, the primary winter-survival organ in bermudagrass. Primo had no effect on the morphology of the grass but did enhance the freeze-tolerance of the rhizomes that were present. These studies suggest that applications of late-season N and Primo may impact winter-survival of hybrid bermudagrass in areas where winterkill is a problem.
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