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Virulence assay
Size of cankers (cm2) produced on dormant American chestnut stems at 3 weeks post-inoculation.
a cpku80/CHV1-EP713, C. parasitica strain cpku80 infected with virulence-attenuating hypovirus CHV1-EP713; cpku80/Δoah, C. parasitica strain cpku80 in which the oah gene has been disrupted.
