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Chemical Resistance and Control of Dollar Spot Caused by Sclerotinia homoeocarpa on Turfgrass of Golf Courses in Korea  

Kim, Jeong-Ho (Korea Turfgrass Institute, Subsidiary of Korea Golf Course Business Association)
Choi, Hee-Youl (Korea Turfgrass Institute, Subsidiary of Korea Golf Course Business Association)
Shim, Gyu-Yul (Korea Turfgrass Institute, Subsidiary of Korea Golf Course Business Association)
Kim, Young-Ho (Department of Agricultural Biotechnology, Seoul National University)
Publication Information
Asian Journal of Turfgrass Science / v.24, no.2, 2010 , pp. 170-175 More about this Journal
Abstract
A total of 24 isolates of S. homoeocarpa were isolated from 16 golf courses in Korea. Chemical resistance of 24 isolates was determined by in vitro fungal growth on fungicide-amended media with thiophanatemethyl (Benzimidazole fungicide family), tebuconazole (demethylation inhibitor fungicide family: DMI), and iprodione (dicarboximide fungicide family). Results indicated that 83.3% of 24 isolates were resistant to iprodione, 62.5% resistant to thiophanate-methyl and 0% resistant to tebuconazale. The dual resistance of iprodione and thiophanate-methyl was 58.3.%. Occurrence rate of fungicide resistance of thiophanate-methyl and iprodione had no relation to turfgrass varieties and isolated locations of pathogen. In the filed test, procymidone, boscalid, and fluquinconazole+pyrimethanil effectively controlled the dollar spot of creeping bentgrass.
Keywords
Boscalid; Fluquinconazole+pyrimethanil; Iprodione; Chemical resistance; Procymidone; Sclerotinia homoeocarpa; Tebuconazale;
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