Aging Birch Trees Die Back From The Top Down Without Tree Trimming
Tree trimming that takes the dead top out of a birch buys that tree more time, and a close look at the trunk tells us how much. The neighbourhood got its name from the birch trees that grew along the edge of the bluffs on an early property here, and white birch is still planted in front yards on nearly every street. It is a lovely tree with a short working life.
Paper birch and European white birch are the favourite target of the bronze birch borer. The beetle goes after trees that are already under stress, and a birch in a hot, dry, sunny yard is almost always under stress. The first clue is thin, pale leaves at the very top of the tree. The dieback then creeps downward, one limb at a time, and D-shaped holes show up in the bark.
When only a branch or two is affected, pruning out the infested wood can keep the tree going for several more seasons. When half the crown has gone bare, tree removal is the safer path, because dead birch turns brittle quickly and drops without warning. We will tell you plainly which side of that line your tree sits on.