Balsam Woolly Adelgid
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Collapse ▲Though balsam woolly adelgid is not as much of a problem as it was in the past due to control of other pests, it can still damage and even kill trees. It’s important to recognize this pest and control it when needed.
On-Line Information – NC State University
CTN 20: Balsam Woolly Adelgid – fact sheet with information on life cycle, scouting, and adelgid management
Scouting for Balsam Woolly Adelgid
Focus on Balsam Woolly Adelgid – including how to control other pests along with adelgids
BWA – Facts at a Glance – quick facts about balsam woolly adelgid (1-page pdf version including photos)
Photo Gallery
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- Balsam woolly adelgid feeding caused the loss of apical dominance – a crooked top
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- This tree has not had a straight top for two years as a result of balsam woolly adelgid feeding
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- Look at any tree with a crooked top to determine if balsam woolly adelgid is present
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- Dead branches caused by balsam woolly adelgid
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- Balsam woolly adelgid feeding causes swelling called gouting
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- Balsam woolly adelgid feeding causes the tree to produce hard, red wood that restricts tree growth
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- Cut Fraser fir stump
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- Close up of woolly spots from balsam woolly adelgid on bark
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- Many eggs easily seen on a piece of cut bark
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- Close-up of balsam woolly adelgid eggs
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- Rubbing against living balsam woolly adelgid will leave a purple stain on fingers.
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- A female balsam woolly adelgid with eggs found between needles on a shoot
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- Balsam woolly adelgid crawlers must find a place to feed within a couple of days
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- Balsam woolly adelgid nymphs and crawler
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- Balsam woolly adelgid nymphs on Fraser fir bud
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- The natural stands of Roan Mountain provide a source of balsam woolly adelgid crawlers
Other On-Line Resources
Penn State Extension: Balsam Woolly Adelgid
Don’t Move Firewood: Balsam Woolly Adelgid