Need help identifying disease on Spring Snow Crabapple - Ask Extension
Spring Snow Crabapple with disease on leaves located in Windsor, CO. Does this appear to be apple scab or another disease?
Knowledgebase
Need help identifying disease on Spring Snow Crabapple #930081
Asked April 29, 2026, 5:32 PM EDT
Spring Snow Crabapple with disease on leaves located in Windsor, CO. Does this appear to be apple scab or another disease?
Larimer County Colorado
Expert Response
Hi Matt,
No, this doesn't look like apple scab. Because it's the tips of the leaves, it looks like the unfurling leaves may have been damaged by cold? Frost?
Fortunately, it's only a few leaves and should not affect the overall health of the tree. The rest of the leaves look very healthy. If it is bothersome, you can prune off the leaves you can reach from a safe distance (avoid being on ladders).
No, this doesn't look like apple scab. Because it's the tips of the leaves, it looks like the unfurling leaves may have been damaged by cold? Frost?
Fortunately, it's only a few leaves and should not affect the overall health of the tree. The rest of the leaves look very healthy. If it is bothersome, you can prune off the leaves you can reach from a safe distance (avoid being on ladders).
