Tree ID and diagnosis

Asked July 16, 2020, 3:19 PM EDT

Hello: I recently moved to a new home to find that we have a beautiful spring-flowering tree in our front yard. However, once it leafed out, we noticed several branches were dying and the bark is coming off in several places. Now, all of thr leaves are becoming mottled as well. Could you please ID the tree and problem then give us a suggested course of treatment? Neem Oil spray does not seem to be helping. Thank you for your advice! Samantha Pullyblank

Howard County Maryland

1 Response

You have a lovely native flowering dogwood. The gray patches on the branches are lichen and are harmless.

The leaves show powdery mildew, a fungal disease which has become stronger in the past few years and is particularly damaging this spring because we had the perfect weather conditions that favor it.

Here is the information on powdery mildew: https://extension.umd.edu/hgic/topics/powdery-mildew-trees-and-shrubs

If you choose to spray a fungicide next spring, do it early and several times if possible.

Ellen