Apple tree disease help

Asked August 1, 2019, 2:56 PM EDT

The leaves on my Cortland and Golden Delicious tree have yellow spots and are browning. Some limbs have dropped the leaves completely. Is this rust or something different? I have purchased organic copper fungicide and applied one spray last week but want to make sure that’s what it is. Pics attached. What else can I do to prevent?

Oakland County Michigan

1 Response

This looks more like apple scab. Check out the following links for details on this disease and ways to control/and manage it: