Adelges piceae
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Author(s): Jerald E. Dewey, USDA Forest Service
Source: IPM Images
Adelges piceae (Ratzeburg, 1844) - (balsam woolly adelgid)
This adelgid is apparently native to Europe and has been recorded from North America since 1955. It can be a serious pest on fir trees (Abies), causing outbreaks with tree mortality and damage to Christmas tree plantations. Especially infestations of the trunk can be very destructive. Crown infestation can cause thinning of the crown, stunting and deformations.
On fir, the adult is densely covered with wax filaments. In North America, A. piceae has only one host plant, fir with 2 parthenogenic generations per year. There, it does not undergo sexual reproduction and does not produce winged forms. The crawler stage is the only moving form and spreads mainly by wind. However, in Europe spruce can be the primary host where males as well as winged forms can develop. Here fir is the secondary host.
| Vernacular names | |
|---|---|
| • Deutsch: | Weißtannenstammlaus |
| • English: | balsam woolly adelgid |
| • Français: | puceron lanigère du sapin |
Synonyms:
Dreyfusia piceae
For details see the respective page in BugwoodWiki.
- Other images of Adelges piceae (Wikimedia Commons, IPM Images, Flickr - click to enlarge)
adelgid
eggs
crawler (1st instar)
fir trees killed during outbreak
infestation
infested tree
