Table 3. Hyphal growth rate and sensitivity of the wild-type strain 2021, reference strain PH-1, and mutants of Fusarium graminearum to phenamacril (JS399-19).

Strain or mutant	Growth rate (cm/day)a	EC50 (μg/ml)b
2021	2.23 ± 0.02D	0.21
PH-1	2.07 ± 0.03E	0.26
Y2021A-102-myo5	2.32 ± 0.04ABC	0.27
Y2021A-24F-myo5	2.33 ± 0.01AB	158
Y2021A	2.32 ± 0.03AB	204
YP-1	2.06 ± 0.03E	146
Y2021B	1.39 ± 0.03G	202
Y2021C	2.30 ± 0.05ABC	213
Y2021D	2.28 ± 0.02BCD	42
Y2021F	1.69 ± 0.03F	149
2021-12A-myo5	2.35 ± 0.02A	183
2021-22B-myo5	2.35 ± 0.02A	186
2021-9C-myo5	2.28 ± 0.03BCD	194
2021-19D-myo5	2.26 ± 0.03CD	65
2021-13F-myo5	2.28 ± 0.02BCD	151

^aGrowth rate was measured after incubation on PDA at 25°C for 3 days. Values are means and standard deviations of three replicates. Means in a column followed by the same letter are not significantly different (P < 0.01).

^bEC₅₀ is the fungicide concentration resulting in 50% mycelial growth inhibition. Values are means of three experiments (differences among the experiments were not significant).