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Image Subject Name Scientific Name Description
1241746 balsam woolly adelgid Adelges piceae Swelling (gouting) around buds and branch nodes.
1241557 Douglas-fir tussock moth Orgyia pseudotsugata Males fly to the females for mating.
1241628 pine butterfly Neophasia menapia Mature pine butterfly larva.
2254034 flatheaded or metallic wood borer
2253078 western pine beetle Dendroctonus brevicomis old damage causing bark to fall off tree
1241517 lodgepole terminal weevil Pissodes terminalis Characteristic chip cocoons beneath bark of spruce terminals distinguish those killed by terminal weevils.
1241590 larch casebearer Coleophora laricella Larch casebearer larvae extend from protective cases to mine needles.
1241594 larch casebearer Coleophora laricella
1241626 conifer sawfly Neodiprion nanulus contortae
1241519 western pineshoot borer Eucosma sonomana Shortened "shaving brush" appearance of infested shoot.
1241604 pine needle sheathminer Zelleria haimbachi Defoliation showing thinned branch tips, and brown, kinked needles.
1241464 pine engraver Ips pini Group kill.
1241477 western balsam bark beetle Dryocoetes confusus Trees killed typically have bright red crowns for a year or two after death.
1241474 fir engraver Scolytus ventralis Dead patches of cambium under roughened bark may indicate patch attack.
1241472 Douglas-fir beetle Dendroctonus pseudotsugae Douglas-fir beetle often kills groups of adjacent trees in successive years. Older dead with little remaining foliage are commonly found near recent mortality. Groups such as this are a good place to look for fresh attacks which will have boring dust on stems but green crowns.
1241515 white pine weevil Pissodes strobi
1241454 western pine beetle Dendroctonus brevicomis Egg galleries showing characteristic serpentine pattern.
1241608 ponderosa pine Pinus ponderosa Normal fall needle drop. The natural abscision of old needles seen here on 4-year old needles-- Not to be confused with needle diseases which kill one or two year old needles.

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