I have spots on my Japanese Maple leaves in addition to some leaves which are withered. I assume the latter is due to not enough water.
Please advise me re the cause of the spots and if there is a remedy.
We receive numerous questions regarding Japanese maples. From your photo the white spots on your leaves appear t be signs of Powdery Mildew. One of our earlier posts on Wilting Leaves on Japanese Maple list treatment options for this fungal disease.
Also if you enter “japanese maple” in the search bar located on the right, you will see numerous archived posts dealing with wilting leaves on Japanese maples.