Virulence phenotypes of 15 H. sojae populations from Korea were determined on seven soybean lines and one susceptible check variety. Two HS types were found. The more common HS type, 2.5.7, comprisied 73.3% of the populations; the less common, HS type 0, was represented by 26.7% of the tested populations. Kang et al. (2022) concluded that when considering the high frequency of H. sojae adaptation to soybean indicator lines, the PI 88788 group may not be a useful source of resistance. They suggested that PI 548402, PI 90763, PI 437654, and PI 89772 will be more useful as resistance sources for soybean breeding programs development of cultivars resistant to H. sojae.
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