Frequently where there have been a large number of infected chestnut
trees in the forest, as on Mount Penn and on the Neversink Mountain at
Reading, or at Galen Hall, Wernersville, Berks County, the owners have
not been so desirous of prolonging the life of the chestnut trees as
of maintaining a grove or woodlot of trees of different kinds. In such
cases the first principles of forestry have been recommended, namely,
requiring the removal of trees that were becoming badly diseased, thus
giving place to other tree species coming up beneath, such as hickories
and oaks, instead of advising any tree surgery.
[Illustration:
Tree surgery. Operator has gouged outer rim of canker, leaving mycelium
of chestnut blight in center. Other cuts shown on tree were made at an
earlier period.]