Question From: J. Lawall - Hillsboro, Oregon, United States
Q: I have a 21 year old flowering plum tree (although an arborist told me it was a cherry) the leaves are starting to have what appears like a rust on the leaves, and they are curling up and turning a rust color, it's turning rust in blotches on the leaves, with a yellowish color too. The leaves aren't dropping, they're staying on the tree. It's turned like this in just a few days time. I've never had any problems with this tree, and certainly don't want to lose it. I did apply an insecticide late spring (first time) to try and keep any insects away. My local nursery told me, it's been a hard summer for ornamental trees. I did buy a fungicide spray that attaches to my hose by Bayer, but not sure now, if I should use it. I'm just not sure what type of disease my tree has, and if I should prune now, and remove the infected leaves. I live in the Portland, OR. area. Any help you can give me, I'd be most appreciative! Thanks so much! (My tree thanks you too)
Applying pesticides and herbicides to trees and plants as a protective measure is a waste of time and money and may do more harm than good. If an arborist told you your tree was a cherry, I'd believe him or her. If you want to save your tree, do not try to medicate it yourself. Call a certified arborist for an onsite evaluation. Your tree could have several problems, some you can't see. Call for help today. Good Luck and Happy Yardening, Nancy.