Thanks, JD3000.
Is it unusual to have borer damage that thins the top third but does not kill the crown? I would think that having the crown still alive, even though it is thin, is a good sign and will help suck up nutrient to the top and heal over the borer galleries in the cabrium layer. Am...
IMG_20170603_153955 by Minneapolis posted Jun 3, 2017 at 3:54 PM
A question for you. My reading said birch borers always damage the crown first. Our 6" diameter whitespire birch had borers yet the crown looks better than the middle branches. But everything is thin in the upper two thirds.
I...