pine trees dying

Asked March 26, 2016, 7:02 PM EDT

We have three pine trees of concern. Pictures attached. The one on the left is a black pine, the other two are shore pines, or so we understand. We were told that the problem is due to the dry weather last winter. Yet another person suspects that it is due to an infection of the sawyer pine beetle which carries a fungus which causes the upper portion of the tree to be starved. He is concerned that the beetles could infect other trees when the dead one(s) are taken down. Can you offer an opinion? Would other photographs be of use? Thanks, -Denis Heidtmann

(Should be Washington county.)

Multnomah County Oregon urban forestry diagnosis of plant problems trees

1 Response

Sorry to see that you are having tree problems. The photos reveal a significant lack of foliage....and I do see an exit hole in the middle photo so there are likely beetles at work. i suggest you have a Certified Arborist take a look at them - find one at www.pnwisa.org - but I'm guessing they may be too far gone to do anything about them.

Here is a link to more information on sawyer pine beetles - http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5187547.pdf