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Sensitivity of Botrytis cinerea Isolated from Infected Leaves of Ginseng to Tolyfluanid  

Kim, Joo-Hyung (Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University)
Kim, Ga-Hye (Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University)
Kim, Heung-Tae (Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University)
Publication Information
The Korean Journal of Pesticide Science / v.15, no.2, 2011 , pp. 188-193 More about this Journal
Abstract
Resistance monitoring for tolyfluanid was conducted over 2 years from 2005 to 2006 with 218 isolates of Botrytis cinerea obtained from infected plants of ginseng. All isolates of B. cinerea were divided into 3 groups such as highly sensitive (HS) group, sensitive (S) group and less sensitive (LS) group to tolyfluanid. HS group was defined as one showing $EC_{50}$ value less than $2.0\;{\mu}g\;mL^{-1}$. $EC_{50}$ value of S group ranged between $2.0\;{\mu}g\;mL^{-1}$ and $18.0\;{\mu}g\;mL^{-1}$, while that of LS group was more than $18.0\;{\mu}g\;mL^{-1}$ Among B. cinerea isolates tested in this study, 174 isolates were included into S group, while 22 isolates were done into HS group. The other isolates belonged to LS group. Botrytis cinerea isolates showed the high correlation of $EC_{50}$ value of mycelial growth with that of spore germination to tolyfluanid. This results could be used for the determination of fungicide resistance and the establishment of strategy for fungicide resistance management.
Keywords
Botrytis cinerea; Ginseng grey mold; Resistance; Tolyfluanid;
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