My well established red maple is slowly becoming covered in thick white powdery stuff and some leaves are shrivelled and misshapen
Outside United States
Replied July 15, 2019, 3:09 PM EDT
I live in England near Stonehenge
Replied July 23, 2019, 2:50 AM EDT
Thank you. It is difficult to diagnose a plant problem without photos, but your description would appear to indicate powdery mildew, a fungal disease. I have attached a photo known to be this fungus. Is that what you have?
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Replied July 23, 2019, 7:03 PM EDT