The Chestnut Blight begins when the fungus Cryphonectria parasitica spreads.

The Chestnut Blight begins when the fungus Cryphonectria parasitica spreads within eastern forests, damaging the American Chestnut’s health, ultimately decimating more than 3.5 billion trees, removing important habitats for wildlife populations, and leading to economic disaster within the communities that rely on them.