Yello color spots on my apple tree leaves

Asked June 4, 2018, 2:28 PM EDT

All most all of the leaves have yellow color dotted spot. Please see attached picture. What could be causing this and what measure should I take to prevent it? Thanks in advanced.

Carroll County Maryland

3 Responses

This is a rust disease. They are prevalent in our area, especially in wet years.
It is not curable, and prevention would have consisted of a regular spray schedule of fungicidal applications earlier in the year.
There is more about Apple Rust Diseases and other problems on this page:

Tree fruits are not easy to grow here without careful management and carefully timed and sometimes repeated chemical inputs. The link above has highlighted links to those management schedules.

Here too is our Apple page:


Thank you for the detailed response. I appreciate it.