The top branches of the Birch tree turn brown. Bronze Birch Borer Signsĭefoliation and yellowing of the foliage are the primary symptoms of a Bronze Birch Borer infestation. These pests create a maze inside the tree trunk by eating it away. Bronze Birch Borers eat away the insides of the tree, blocking the food and water supply. Once the symptoms are visible, there’s no way to bring the tree back to life. The points of exits of the larvae are D-shaped. Bronze Birch Borer Damageīronze Birch Borer larvae eat away the plant for two years before you can actually see the symptoms. These larvae are present under the bark of the birch tree. The larvae are pale white in color and are elongated. Bronze Birch Borer IdentificationĪdult Bronze Birch borer may look olive to brown in color with coppery wings. These eggs turn into larvae in several weeks. The foliage dies from the top towards the bottom when it’s infested by these pesky pests.īronze Birch Borer is a type of beetle that lays eggs in the trunk of the tree in the summer season. 4 Why are the leaves falling off my Birch tree? Birch tree dying from top downīirch tree dies from the top down when the tree is heavily infested by the bronze birch borers.
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