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Fungicide Screening for Control of Summer Spinach Damping-off Caused by Rhizoctonia solani  

Kim, Byung-Sup (Department of Applied Plant Science, Kangnung National University)
Yun, Yue-Sun (Department of Applied Plant Science, Kangnung National University)
Yun, Choel-Soo (Department of Applied Plant Science, Kangnung National University)
Zhang, Xuan-Zhe (Department of Applied Plant Science, Kangnung National University)
Yeoung, Young-Rog (Department of Applied Plant Science, Kangnung National University)
Hong, Sae-Jin (Department of Applied Plant Science, Kangnung National University)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.1, 2005 , pp. 35-40 More about this Journal
Abstract
Damping-off of summer spinach caused by Rhizoctonia solani AG-4 has become a very important disease. For the control of summer spinach damping-off, antifungal activity of thirteen fungicides (pencycuron, trifloxystrobin, pyraclostrobin, azoxystrobin, kresoxim-methyl, validamycin, fluazinam, Benlate-T, flutolanil, cyazofamid, hexaconazole, tebuconazole, prochloraz) were evaluated in vitro and in vivo. Pencycuron, pyraclostrobin, validamycin, fluazinam, Benlate-T, hexaconazole, tebuconazole, and flutolanil significantly suppressed the mycelial growth of the pathogenic fungus. However, trifloxystrobin, azoxystrobia kresoxim-methyl, cyazofamid, and prochloraz did not represent good inhibition on the growth of R. solani. When applied by soil drenching (2,000 mg/L), pencycuron, pyraclostrobin, validamycin, fluazinam, Benlate-T, and flutolanil provided spinach survival ratios of 97.8%, 84.4%, 93.3%, 95.6%, 91.1%, and 86.7%, respectively. Also when treated in seed at 2,000 ing/L, pencycuron and pyraclostrobin displayed survival ratios of more than 85.1%.
Keywords
spinach; damping-off; Rhizoctonia solani; chemical control;
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