Powdery mildew on crepe myrtle
How can I treat our crepe myrtle with powdery mildew. I want to do something now. Also, I need a treatment that will not harm the bees and birds. The tree is about 6feet tall, in an open, sunny location. It is about 8 years old.
See our website for photos and more information on powdery mildew http://extension.umd.edu/hgic/powdery-mildew-trees-and-shrubs
This fungal disease is usually not lethal to crape myrtles but is certainly not attractive. Control begins by selecting powdery mildew resistant varieties. Place susceptible plants where there is adequate sunlight and good air circulation to reduce humidity levels. Allow proper plant spacing for the same reasons. Pruning for better air circulation also may help.
Next season you will have to decide if you want to spray. Fungicide treatments can help to protect new or un-infected foliage they are not curatives. mh