Stone fruits are fruits with pits: peaches, plums, nectarines, apricots. They are susceptible to invasion by borers. When we first bought our house we had a nice apricot tree in the back yard and a peach tree. The peach tree had just one healthy branch that first year and the next year it had one single leaf. Borer Infestation. The apricot died shortly after that. Dang borers. The prevention for this is to spray the trunk and lower branches with Dursban on July 1 and August 1. But Dursban is no longer sold. So see what replacements are available where you shop and spray the trees on July 1. (Okay June 2 is a Saturday and that will suffice).
Birch trees are also vulnerable to borers so give them the same treatment.
IF you have a tree that dies of a borer infestation, do not save the trunk for firewood. The insects will leave the tree and look for another host--like a neighboring apricot tree :). Get it out and away from your trees and your neighbors.
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