If your fallen tree leaves appear curled, spotted, or brown, anthracnose could.

First, see what type of tree you have.

Apr 12, You said the leaves were still green when they fall, but the stems looked darkened. There could be several reasons for leaf drop, but the most likely cause may be the leaf stalk borer or petiole Author: Tom Bruton. Some trees tend to hang on to a portion of their leaves through the winter, making spring leaf drop perfectly normal. We usually think of fall as the season for shedding, but there are a few tree species that go against the grain.

But if you don’t have a tree that naturally loses its leaves in spring, your tree could have an infection.