Plum disease

Question

Can you tell me what disease, if any, my plum tree has? It is about 3 years old and the leaves are starting to curl and they are going brown and a lot of them have brown spots on them.

Answer 1

It could be plum tree aphids (look for pale greenish insects inside curled leaves) or peach tree borer, which also affects plum trees and other fruit (look for sawdust-like residue). Additionally, it could be canker (which would be my guess due to the amber colored sap). Here is more information: https://www.gardeningknowhow.com/edible/fruits/plum/control-leaf-curl-plum-aphids.htm
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm
https://www.gardeningknowhow.com/plant-problems/disease/weeping-amber-in-trees.htm