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Weed & Pest Management
700 Jefferson County Parkway
Golden, CO 80401
303-271-5989

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Weed & Pest Management
700 Jefferson County Parkway
Golden, CO 80401
303-271-5989

 

Mountain Pine Beetle - How to ID

Some Symtoms to Look For

Check the needles: In MPB-infested trees, the needles start to fade and eventually become rust colored. The fading starts in the lower crown and moves upward. Fading usually starts 8-10 months after the attack.

Trees w/ MPB damage

 

Look for pitch tubes on the lower 15 feet of the trunk of your tree. The pitch tubes appear as cream or pinkish colored masses resembling popcorn.

Pitch tube

 

Use a hatchet to peel back the bark to check the sapwood for blue staining caused by the fungus.

Bluestain

You may also notice frass (sawdust looking material) in the cracks of the bark or at the base of the tree.

 

  

Woodpeckers may feed on the MPB larva found underneath the bark. Look for feeding holes 1/2-3/4 of an inch wide along the trunk and bark flakes at the base of the tree.

Woodpecker damage


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control options for MPB

 


 

 

Last Modified: Jan 28, 2011 02:45 PM
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