398-2 Impact of Irrigation Regime and Host Cultivar on Dollar Spot of Creeping Bentgrass.

See more from this Division: C05 Turfgrass Science
See more from this Session: Turfgrass Cultural Management: Irrigation and Fertility
Wednesday, November 5, 2014: 1:00 PM
Long Beach Convention Center, Room 104B
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Nancy Dykema, Michigan State University, Michigan State University, East Lansing, MI, Joseph M. Vargas, Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, Kevin W. Frank, 1066 Bogue St. Room 584E, Michigan State University, East Lansing, MI and William Kirk, Michigan State University, East Lansing, MI

IMPACT OF IRRIGATION REGIME AND HOST CULTIVAR ON DOLLAR SPOT OF CREEPING BENTGRASS

Nancy Dykema, Joseph Vargas, Jr., William Kirk, and Kevin Frank

Dollar spot (DS), caused by Sclerotinia homoeocarpa, is an important disease of turfgrass. Irrigation practices and host resistance can impact disease incidence and aesthetics on fairway turfgrass. This study was conducted to determine the impact of irrigation regime, based on timing and frequency, and creeping bentgrass cultivar on DS incidence. Irrigation was applied at either 2200 h daily or twice weekly, or 0500 h daily on fairway plots established to each of three creeping bentgrass cultivars, 船eclaration', 全RP-1WM', and 銑-93'. 船eclaration' and 全RP-1WM' were considered resistant to DS and 銑-93' was considered susceptible. Plots watered at 2200 h daily exhibited significantly less disease than those irrigated at 2200 h twice weekly, regardless of creeping bentgrass cultivar. 全RP-1WM' developed the least amount of DS each year among all cultivars. In 2011 and 2013, the 全RP-1WM' plots receiving daily irrigation (AM or PM) did not significantly differ and exhibited less DS than those irrigated at 2200 h twice weekly for the same cultivar.

See more from this Division: C05 Turfgrass Science
See more from this Session: Turfgrass Cultural Management: Irrigation and Fertility
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