Controlling Maple Twig Borer Infestations

Recognizing the Pest

Hollow branches with small white larvae and eggs inside point to the maple twig borer (Proteoteras aesculana). Larvae bore into current-year shoots, killing terminals and causing bushy, deformed growth. Frass and webbing often mark entry holes near the base of new growth.

Integrated Management Approach

Combine cultural and chemical controls for best results:

• Sanitation: Remove and destroy infested twigs in fall or spring.
• Systemic treatment: Apply Bayer Advanced Tree & Shrub Insect Control as a soil drench; the roots translocate the insecticide to the twigs, killing borers as they feed.
• Foliar sprays: When moths are active, apply residual insecticides to foliage (follow label carefully to avoid plant injury).

Severe infestations may require multiple applications. Consult your local garden center for product availability.