About Twolined Chestnut Borer
The Twolined Chestnut Borer is found primarily in the eastern half of the US and is a pest of oak trees. The insect was named for its preferred host tree, the American Chestnut, which has become rare as a result of chestnut blight. The adult is dark and slim bodied, about 10-13 mm in length, with two bronze stripes down the back. The larvae of the two lined chestnut borer, which do the actual damage to the tree, are unseen, feeding and developing under the bark within the vascular tissue of the tree, interrupting the flow of water and nutrients. Initial signs of infestation will be scattered areas of foliage which wilts and browns but does not fall off, leading to branch dieback the following year. Later in the infestation stage, D-shaped exit holes can be found in the trunk.
Host Trees for Twolined Chestnut Borer
Oaks, American Chestnut
Treatments for Twolined Chestnut Borer
Learn More About Common Tree Pests & Treatments
*Important: Always read and follow label instructions before buying or using these products. The instructions contain important conditions of sale, including limitations of warranty and remedy. TREE-äge® Insecticide is a Restricted Use Pesticide and must only be sold to and applied by a state certified applicator. TREE-äge® is not registered for use in all states. Please check with your state or local extension service prior to buying or using this product. TREE-äge® is a registered trademark of Arborjet, Inc.