Answer: The sap indicates a wound of some kind, and I'm especially suspicious that the leaves are drying up. There is a disease called bacterial wilt that is common on cherry trees. Oozing sap and dying leaves are classic symptoms of this disease. Sometimes you can control the problem by spraying in the spring just as the leaf buds begin to swell. You may want to check with your cooperative extension office for publications on this cherry tree problem. There will be photos of the symptoms plus a spray schedule to keeping the damage to a minimum. Contact University of Nevada Cooperative Extension, 5305 Mill Street, Reno, NV 89502-2315 phone (775) 741-4453. Best wishes with your cherry tree.
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