Once an important hardwood timber tree, the American chestnut is highly susceptible to chestnut blight, caused by an Asian bark fungus ( " Cryphonectria parasitica ", formerly " Endothia parasitica " ) accidentally introduced into North America on imported Asiatic chestnut trees.
2.
Chinese chestnuts have evolved over a long period of time in coexistence with the bark fungal disease chestnut blight ( " Cryphonectria parasitica ", formerly " Endothia parasitica " ), and have evolved a very successful resistance to the blight, probably more so than any other species of chestnut, so that, although it is not immune, it typically sustains no more than minor damage when infected.
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