Montmorency cherry tree disease

[mroot]

Your problem is cherry leaf spot. Here is a link that talks about cherry leaf spot.

Cherry Leaf Spot Issues – What Causes Leaf Spots On Cherries

A thread that discusses cherry leaf spot spraying and the importance of spraying early below.

Best spray to use for cherry leaf spot

hey folks. i noticed my new nanking cherries have cherry leaf spot on them. what do you guys recommend for a spray for them. im new to growing sour cherries and i don’t want this to spead to my other young s. cherries and plums. thanks in advance for your response!