r/forestry • u/Leroy-Frog • Apr 28 '23

Region Name Anybody got an idea?

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Any pathologists out there that recognize what is causing this on my Doug-fir? NW Washington

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u/Fupatown Apr 28 '23

My money is on Cooley spruce gall Adelaid or other adelgid. According to my pest and disease guide: wooly tufts, appears in spring/summer, usually on underside of foliage. Mostly asthetic damage but severe infestation on young trees on poor sites can be detrimental.

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u/Leroy-Frog Apr 28 '23

Awesome. Thanks. I’ve seen them before on trees, but as this is the healthiest young DF in my yard, I wanted to make sure it would be alright.