What’s this on my mutzu/crisping apple leaf?

Discovered disease starting on this apple tree. It is still flowering so I haven’t hit it with triazicide yet but can pull off the few blooms to jump on this infection. Is it scab?

If it’s insect related you should be able to see signs from the underside. But I’d like to know what’s causing those little indentations in the green part of the leaf. Triazicide may have helped if it’s insects causing the problem and your timing was right. But without knowing what’s causing it, it’s hard to guess what to treat it with.

1 Like

I don’t think it’s bug related- haven’t seen any on that tree, just edges of the leaves turning brown. This is the first year I might get fruit off this tree so I don’t want to lose it. Thank you for your thoughts.

1 Like