설부소립균핵병균 Typhula incarnata의 살균제 감수성

In response of fungicides for control of gray snow mold, isolates of Typhula incarnata were collected from three golf courses in 2012 Yongpyeong, Korea and tested for sensitivity to propiconazole, tebuconazole and azoxystrobin fungicides. Four discriminatory concentrations were used to detect in vitro sensitivity of 50 isolates. Mean 50% effective concentration inhibiting mycelial growth(EC 50 ) values for tebuconazole was the lowest among the three fungicides. The EC 50 value of tebuconazole ranged from 0.0005㎍ ml -1 to 0.014 ㎍ ml -1 with a mean of 0.0048 ㎍ ml -1 . The mean EC 50 values of propiconazole in triazole family was 0.5825(0.78-1.651) ㎍ ml -1 . EC 50 value of azoxystrobin ranged from 0.0017 ㎍ ml -1 to 0.131 ㎍ ml -1 with a mean of 0.0278 ㎍ ml -1 . There was no correlation among EC 50 values for propiconazole, azoxystrobin and tebuconazole indicating no cross-resitance relationships with each other. Results of this study were confirmed no resistance isolates in vitro sensitivity of T.incarnata of three fungicides in Yongpyeong.