(360) 504-3825
104 N Laurel St Suite
110 Port Angeles, WA 98362

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.

What is MCH?

MCH (3-methylcyclohex020en-1-one) is a biochemical pesticide than can be used as a short-term treatment to protect individual Douglas-fir trees or stands from the Douglas-fir bark beetle attacks. MCH is an anti-aggregation pheromone that is naturally produced by Douglas-fir bark beetles to disperse adult beetles away from trees that are already occupied to prevent the overpopulation of a tree.

MCH Application

MCH has been artificially synthesized and either comes in slow release bubble capsule releasers (MCH bubble caps) or a flake form. MCH bubble capsules may be applied throughout an area or on an individual tree basis to protect non-infested Douglas-fir trees. The flake form is more appropriate for large landscape scale applications. MCH can be applied in the spring before bark beetle flight takes place. Generally, the application is in January – April.

Integrated Pest Management Program

MCH 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.
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