Bark Beetle Treatment

Controlling Bark Beetles

We offer short-term and long-term treatment to protect Douglas-fir trees from bark beetle attack.

Your forest is in decline and you suspect bark beetles.
You want to protect the remaining healthy trees from attack.

Bark beetles, engravers and other pests can invade and cause damage to forests across the United States. In Washington, our Douglas-fir trees are susceptible to a variety of wood boring pests. Luckily these pests are treatable. Pests mostly affect unhealthy, sick and declining trees, but generally healthy trees can be affected in the right conditions. Bark beetle pest treatment is a 3-5 year treatment plan best accomplished in cooperation with a Forest Management Plan or Forest Stewardship Plan.

Help your beetle infested trees.

We protect trees against bark beetle attacks through Clallam, Jefferson, Kitsap, Mason, Island and Thurston counties between January and April. Give us a call and schedule an appointment to discuss your best options.

What are the symptoms of a bark beetle attack?

Key features of Douglas-fir bark beetle attacked trees include: significant amounts of frass in bark cervices and around the base of the tree, pitch streams high on the stem, and root disease. It is important to note that Douglas-fir bark beetles generally attack larger trees (>14in diameter at breast height). During later stages of a Douglas-fir bark beetles outbreak, the crowns of infested Douglas-fir trees will turn red as the tree dies and needles decline.

How can you prevent an attack on trees or stands of trees?

We combat Douglas-fir bark beetle damage with the use of beetle pheromones to control their behaviors.  These pheromones are used by beetles naturally to communicate with each other.  We target individual pheromones to interrupt beetle aggregation on specific trees and avert attacks on high value trees.

Where We Apply Anti-Aggregation Pheromones

Prevention is key when it comes to protecting significant trees or stands of trees from a Douglas-fir Bark Beetle attack.  Pheromone treatments are successful on an individual tree basis to <1 acre to 1-500-acre scale and are appropriate for trees when Douglas-fir bark beetle-initiated tree mortality could significantly affect high value trees or resource management objectives.

Integrated Pest Management Program

The pheromone treatment method is only one part of an Integrated Pest Management (IPM) program and can only provide short term protection. Additional IPM activities include: removing or burning infested trees, thinning and promoting size class diversity of trees, and monitoring beetle activity until their activity subsides.  Contact Peninsula Urban Forestry for an anti-aggregation pheromone treatment and IPM plan today.
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