I am referring to my original question: Why are the leaves falling off my healthy.

Apr 27, There could be several reasons for leaf drop, but the most likely cause may be the leaf stalk borer or petiole borer.

About Cookies on this site Davey uses cookies to make your experience a great one by providing us analytics so we can offer you the most relevant content.

Both insects burrow into the leaf petiole in the spring, causing the leaves to fall. The larvae remain in the leaf when it falls and burrows into the ground and remains dormant until the following year. About Us. Apr 12, Why is my maple tree losing lots of leaves now? You said the leaves were still green when they fall, but the stems looked darkened. There could be Author: Tom Bruton.

Jun 24, Lots of green leaves have been falling off my healthy looking maple tree for about 3 - 4 weeks now. I believe it is a sugar maple. There are no marks on the leaves themselves, and the tree, and bark appear healthy. The tips of the leaf stems look dark. After doing some online research, I thought maybe it was maple petiole borer. Sep 01, Why is my maple tree losing leaves in summer? Your maple might be suffering from a petiole borers infestation or tar leaf spot disease.

Did you know the small piece that connects a tree leaf to its stem is called a petiole? Tiny petiole borers feed on. May 11, It isn't losing so many that the crown is starting to thin, but the ground underneath is spotted with many leaves. Click to expand this can be common when a tree has put out leaves early in the season due to warm temps. it has recenly been cooler and we have had some decent winds a few times (down here anyway). the leaves this early in the season can fall off easily.