River Birch Tree Borers

But healthy trees aren t off.
River birch tree borers. Below learn how to identify tree borers and get info on treatment. 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. Attractive salmon pink to reddish brown bark exfoliates to reveal lighter inner bark.
Generally the bronze birch borer is the. The river birch has not yet reached the popularity of many maples and oaks but it is well on its way. The bronze birch borer typically attacks trees which are already stressed or in decline. This species is resistant to bronze birch borer bbb.
But as a landscape tree it can be planted almost anywhere in the u s. The four wood boring insects mentioned below attack a wide range of trees. 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. Dark green foliage turns a beautiful buttery yellow in the fall.
Usually native borers like the bronze birch borer seek out trees that are already stressed i e by drought disease or maybe a pruning injury. The bronze birch borer is the most threatening pest of ornamental birch especially white barked varieties and trees under stress.