TWO-LINED
CHESTNUT BORER TREATMENT

What Is Two-Lined Chestnut Borer?

The two-lined chestnut borer (Agrilus bilineatus) is an insect that attacks oak trees, beech, hornbeam, and chestnut trees. Generally, these trees are stressed by drought, compacted soils, or other insects or diseases, as the borer takes advantage of compromised trees most easily. Trees may be killed in the first year of attack, but in most cases, death usually occurs after 2 to 3 successive years of heavy infestation. Typically, the crown is attacked during the first year, while the remaining portions of the branches and trunk are infested during the second and third years.

Two-Lined Chestnut Borer Damage Signs

Two-lined chestnut borer damage can be spotted through small and discolored foliage, which die back of branches in the crown. Leaves of infested branches turn uniformly red-brown and remain attached to the tree. The leaves on non-infested branches remain green. Infested oaks have a distinct pattern of dead and live leaves on them. These symptoms are more evident in hot, dry weather, indicating the presence of the two-lined chestnut borer in stressed trees.

Two-Lined Chestnut Borer Treatment

f you suspect your tree is sick, please call us immediately at (608) 886-0626. Once we receive your call, our Certified Arborists spring into action. Here’s what our process looks like:

• You call, we answer!
• We will schedule a time for our certified arborists to stop in and inspect your tree(s).
• During our visit, we will take the time to address any worries you may have and do a full inspection and analysis of your yard to make sure everything is healthy and happy.
• We will provide you with an easy-to-understand write up of what we’ve discussed.
• When you give us the okay, we will schedule a time to complete the work.
• Final step: You are satisfied and your trees are pest free!

Preventing Two-Lined Chestnut Borer

Like many tree diseases, the two-lined chestnut borer is attracted to trees under stress. This is why we always recommend pairing any disease treatment with a stress-reducing course of natural, full-spectrum nutrients.

Since soil compaction is generally a contributing factor in all urban environments, we have developed a specific soil-building program proven to reduce bulk density and alleviate compaction issues. Preventative treatment is essential to protect your oak trees and chestnut trees from the devastating effects of the two-lined chestnut borer. Regular monitoring and early intervention can save your trees and keep them healthy for years to come.