Hello, My 12 year old Japanese Maple (miniature) has recently developed white powdery spots on its trunk. Also the leaves have come up quite sparsly this spring and they have a brown withery end to many of their tips. I would like to know what is occurring and how to treat it. I love this tree. Thank you Kathleen Gaul Dublin email@example.com
Miniature Japanese Maple Disease or Pest
Certified GKH Gardening Expert
This sounds like either Scale or Mealybug.
These articles will help you.