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My Black Walnut tree is leaking sap terribly. What's wrong?
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Walnuts can get a disease called slime flux. This bacterial disease causes fermentation of the sap and it will ooze out of crotches, wounds, cracks, etc. Look up slime flux on google. See if the pictures match your symptoms. Unfortunately there is nothing you can do to cure the tree if it has slime flux.
If the leaves look sap covered, it is a sucking insect. Also cankers can cause sap to ooze.
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