Mycobiology

The Korean Society of Mycology (한국균학회)
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The Effect of Fungicides on Mycelial Growth and Conidial Germination of the Ginseng Root Rot Fungus, Cylindrocarpon destructans

  • Shin, Jong-Hwan (Division of Bioresource Sciences, Kangwon National University) ;
  • Fu, Teng (Division of Bioresource Sciences, Kangwon National University) ;
  • Park, Kyeong Hun (Department of Herbal Crop Research, National Institute of Agriculture Science, RDA) ;
  • Kim, Kyoung Su (Division of Bioresource Sciences, Kangwon National University)
  • Received : 2017.07.11
  • Accepted : 2017.08.24
  • Published : 2017.09.01
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Abstract

Ginseng root rot caused by Cylindrocarpon destructans is the most destructive disease of ginseng. Six different fungicides (thiophanate-methyl, benomyl, prochloraz, mancozeb, azoxystrobin, and iprodione) were selected to evaluate the inhibitory effect on the mycelial growth and conidial germination of C. destructans isolates. Benomyl and prochloraz were found to be the most effective fungicides in inhibiting mycelial growth of all tested isolates, showing 64.7% to 100% inhibition at a concentration of $10{\mu}g/mL$, whereas thiophanate-methyl was the least effective fungicide, showing less than 50% inhibition even at a higher concentration of $100{\mu}g/mL$. The tested fungicides exhibited less than 20% inhibition of conidium germination at concentrations of 0.01, 0.1, and $1{\mu}g/mL$. However, the inhibition effect of mancozeb on condium germination of C. destructans was significantly increased to 92% to 99% at a higher concentration of $100{\mu}g/mL$, while the others still showed no higher than 30% inhibition.

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References

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