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KMID : 0352720050290040185
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Journal of Ginseng Research
2005 Volume.29 No. 4 p.185 ~ p.191
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Effect of Fludioxonil, Flutolanil, and Thifluzamide on Suppression of Damping-off Caused by Rhizoctonia solani on Panax ginseng
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조대휘/Cho DH
유연현/Yu YH
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Abstract
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In vitro and in vivo effectiveness of fungicides were evaluated for the control of damping off caused by Rhizoctonia solani on Panax ginseng. Fludioxonil(67 ㎎ a. i./L), flutolanil(75 ㎎ a. i./L), thifluzamide(35 ㎎ a. i./L), and mepronil (750 ㎎ a. i./L) were selected from 9 fungicides, which were based on inhibition of mycelial growth of R. solani (isolate Rh 9801) and duration of fungicidal effectiveness against the pathogen in vitro. Field trials were made twice in the year of 2003 and 2004. Experimental plots (54 m×0.9 m) of 4-year-old ginseng fields were artificially infested with 5㎏ and 14 ㎏ in fresh weight of inoculum in 2003 and 2004, respectively. The fungicides were drenched at a volume of 8l in 3.6 m×0.9 m with 3 replications. Fludioxonil, flutolanil, thifluzamide and mepronil reduced the incidence of damping off by 73%, 69%, 69% and 43%, respectively. In the 2004 trial, fludioxonil, flutolanil, and thifluzamide showed similar result as reducing the incidence by 85%, 84%, and 82%, respectively, in the plot where the inoculum was applied 2.8 times more than the 2003. The disease incidences in untreated control were 12% in 2003 and 47% in 2004.
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