The bronze birch borer is the most threatening pest of ornamental birch especially white barked varieties and trees under stress.
River birch tree borers.
In later stages of infestation the trunk will show d shaped rust stained exit holes.
A birch infested with bronze birch borer will start showing dieback in the crown increasing in severity as the infestation continues often leading to death of the tree.
Generally the bronze birch borer is the.
The species is valued for its relatively rapid growth tolerance of wetness and some drought unique curling bark spreading limbs and relative resistance to birch borer.
This species is resistant to bronze birch borer bbb.
Attractive salmon pink to reddish brown bark exfoliates to reveal lighter inner bark.
Dark green foliage turns a beautiful buttery yellow in the fall.
But as a landscape tree it can be planted almost anywhere in the u s.
Early warning signs of damage are a yellowing and thinning of foliage at the upper crown of the tree and d shaped holes in the trunk where the borer larvae have made entry.
The four wood boring insects mentioned below attack a wide range of trees.
The bronze birch borer typically attacks trees which are already stressed or in decline.
But healthy trees aren t off.
Wood eating beetles do exactly as their name describes they eat away at the river birch betula nigra leaving behind a damaged and unhealthy tree.
The river birch has not yet reached the popularity of many maples and oaks but it is well on its way.