Insect Overview

The Flathead Borer is a wood-boring insect that primarily affects hardwood trees, particularly species like ash, oak, and elm. The larvae of the borer tunnel into the wood, causing extensive damage to the vascular system of the tree. If left untreated, infestations can result in tree decline, and in severe cases, the death of the tree.

The Flathead Borer typically targets weakened or stressed trees, often attacking trees that have been injured by other pests, diseases, or environmental conditions. The larvae feed on the tree’s inner bark and wood, creating extensive tunnels and galleries that disrupt the flow of nutrients and water.

Early detection and treatment of Flathead Borer infestations are crucial in preventing significant damage and ensuring the tree's long-term health. Effective control measures can reduce the spread of the infestation and protect nearby trees from further harm.

Symptoms

  • Visible holes or tunnels in the tree bark.
  • Weakened tree health, with reduced foliage.
  • Discolored or dead patches of bark.
  • Sawdust-like material (frass) around the base of the tree.

Recommended Treatment

Apply Vivid-II as a treatment to control Flathead Borers. Follow the application instructions for proper dosage based on tree size and pest severity. Apply the treatment during early spring or late fall when borers are most vulnerable.

Treated Species

Many tree species may be affected by Flathead Borer Treatment Guide. However, Vivid II is only approved for use on the following trees per the EPA product label.

  • Ornamental Trees (including forest, ornamental, non-crop-bearing trees, and woody shrubs)