Answer :

Fungus affects the American chestnut is Cryphonectria parasitica.

Describe Cryphonectria parasitica.

Cryphonectria parasitica is a bark pathogen that only infects tree sections above ground, such as stems, branches, and, eventually, twigs. The pathogen-induced symptoms on sensitive hosts (European and American chestnut) vary according on both the virulence of the specific C. Cryphonectria parasitica is a fungus that parasitizes chestnut trees. Chestnut blight was the name given to this disease. C. parasitica is native to Southeast Asia, but inadvertent importation resulted in invasive populations in North America and Europe.

Given

Fungus affects the American chestnut is,

Cryphonectria parasitica

The Appalachian woodlands in the eastern United States are home to the American chestnut. The trees have columnar trunks that can grow to heights of up to 40 m and have diameters ranging from 90 to 150 cm. The chestnuts are little, around 5 g, about 77 chestnuts/kg, but have exceptional flavor and are covered with thick, transparent bristles. There have been claims of its superiority and adaptability in comparison to other species' wood.

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