Phyllosticta mimima is a relatively small threat to your tree.
May 31, This leaf drop is caused by the feeding of maple petiole borers, Caulocampus acericaulis. Petiole borers are small insects called sawflies, which are non-stinging wasps. The sawfly is only about 1/6 of an inch long and emerges from the soil in the spring to mate and lay eggs near the base of the petiole of maple shrubmulching.clubted Reading Time: 2 mins.
Treating the trees is usually not effective because the spores can travel from a neighbor's tree onto yours.
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.
Sep 27, Tom, a Davey Tree blog reader, noticed his maple was struggling and reached out to us for help. Tom asked, “My wife and I have a year-old maple tree in our backyard that has been showing signs of stress.
The leaves are small, and some of the maple tree branches are dying.
That said, scorch can sometimes be an indication of a more severe underlying cause such as root rot, which affects the tree's ability to absorb water because the aptly named fungus damages the roots, or an insect infestation.
Do you have any recommendations, or is it too late?”. 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 Author: Tom Bruton.
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. Jul 20, When the trees are stressed by drought or sucking insects like aphids, the leaves will turn yellow or brown before dropping.
These insect infestations are quite unpredictable, and usually only result in a loss of 25% to 30% of the tree's leaves. Most trees fully recover. May 11, Location. Harrodsburg, ky.
May 10, #1. Hello, I have a mature sugar maple in my back yard that has been dropping green leaves for the past several weeks. It isn't losing so many that the crown is starting to thin, but the ground underneath is spotted with many leaves. It has a dense crown, and I wonder if it could be that the interior.