Plum Trees
Q.

Plum tree is covered with sap

Anonymous added on August 1, 2015 | Answered

Bark on young plum tree is covered with resin-like sap.

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on August 1, 2015

It might be bacterial wetwood or peach borers or canker, depending on how the sap looks. These articles will describe the nature of the running sap for each problem and will suggest solutions: https://www.gardeningknowhow.com/ornamental/trees/tgen/wetwood-bleeding-trees.htm
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm
https://www.gardeningknowhow.com/plant-problems/disease/weeping-amber-in-trees.htm

Additionally, it could be sap-sucking insects, like aphids, which leave behind sticky honeydew. Here is more information: https://www.gardeningknowhow.com/garden-how-to/info/what-is-honeydew.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/aphids-tree-disease.htm

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