What can I do? My cherry tree has lots of sap on it.
Cherry Tree With Sap
Certified GKH Gardening Expert
Depending on how it looks, it could be a few things.
If the "sap" is dripping from the leaves, this means the tree has aphids. The sap is actually honeydew from the bugs. This article will help with that:
If the sap is on the bark, it could be canker. This article will help with that:
If the sap is on the fruit, it could be peach borer, which can attack any stone fruit. This article will help with that: