First, realize that Anthracnose is not a “killer” disease!
It’s scary; this year it’s dramatic; but the
trees are already growing new leaves to replace the ones being
Anthracnose is a
fungus. It can affect not only the leaves, but also twigs and buds of
the Sycamore tree. Almost every genus of trees has its own
anthracnose… sycamore anthracnose will NOT go to maples, or ash,
Cool springs make anthracnose worse
than even exceptionally wet springs. We just went through 3 ˝ weeks
of cool, wet weather… perfect weather to grow the anthracnose
Anthracnose is controllable. If the tree is small enough, two
sprays in the spring will take care of it for that year.
However, most mature sycamores are too large to spray cost
effectively. For them, we use the same fungicide used for Dutch
Elm Disease, and inject it into the trunk in mid-summer.