Hi I am new to the forum (and gardening!) and after some advice for my approx 30ft red maple tree. Unsightly white spots are all over the leaves and also on the tree trunk. See photo below. Could anyone tell me what they are? Is it powdery mildew? And also how to treat please? Also could anyone tell me what my tree is called please? Is it a Crimson King? I have lived in the property for ten years and in that time it’s gone from around 10ft to 30ft - will it grow anymore? Sorry for all the questions!