The black residue is just the sap.
Two Common Causes of Spring Leaf Drop. 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. First, see what type of tree you have. Then, examine its fallen leaves. Jun 01, Wilted leaves in sugar maple caused by maple petiole borer.
The maple petiole borer only produces one generation per year. Most of the time only a small number of leaves fall from the affected maple tree and no significant damage is done. Occasionally, a maple can experience % leaf loss, but this is highly unusual because parasites generally keep the maple petiole borer population under control.
No insect controls are recommended due to the minor amount of leaf Estimated Reading Time: 1 min. May 11, There is a tree disease called Anthracnose that can cause leaf drop in the spring. I do not know if it attacks maples. It is common on certain ash and sycamore (Fraxinus and Platanus) but not on the maples (Acer) around here.
Sep 27, Maple Tree Branches Dying. Small Leaves. Early Fall Color. Is My Maple Tree Dying? If you spot the above symptoms on your tree, maple decline could be plaguing your tree. Also, look for leaves that are too light in color or look burnt. If there are fewer leaves than normal, that’s another telltale sign. What exactly is maple decline? Unlike. Apr 12, There could be several reasons for leaf drop, but the most likely cause may be the leaf stalk borer or petiole borer.
Both insects burrow into the leaf petiole in the spring, causing the leaves. Jul 20, When maples suddenly drop their leaves in June or July, it's usually due to drought, a sudden change in temperature or insects like scale, aphids or a specific wasp larva that burrows into the leaf petioles.
When the trees are stressed by drought or sucking insects like aphids, the leaves will turn yellow or brown before dropping. Jul 04, Phytophthora root rot is caused by a wet spring or leaving your maple tree in poorly drained soil. The main willow tree leaning, Derwood MD are yellow, relatively-smaller sized leaves and dark brown or black tree roots. Unfortunately, trees with root rot usually can't be salvaged and need to be cut down to prevent injuring people or damaging property.