The Dollar Spot Susceptibility of 25 Bentgrasses is Consistent across Five States in the Central USA

摘要

Bentgrasses (Agrostis spp.) are commonly used on golf courses in the Central USA, but dollar spot (caused by species within the genus Clarireedia gen. nov.) seriously injures surfaces not protected with fungicide. Cultivars vary in susceptibility to dollar spot (Abernathy et al, 2001; Brede, 2007; Koch and Kerns, 2012; Ryan et al., 2012; Settle et al., 2001), and host resistance is an effective way to limit disease development, fungicide application frequency and selection of fungicide resistant dollar spot isolates. Superintendents and scientists often use data from the National Turfgrass Evaluation Program (NTEP) to select less-susceptible cultivars, but data is not available for all locations. Rigorously confirming assumed performance of many cultivars throughout the Central USA. would benefit the turfgrass management community. Our objective was to determine the consistency of relative dollar spot resistance among 25 bentgrass cultivars maintained under putting green or fairway conditions withor without fungicides across the Central USA.