Jane Taylor, USDA Forest Service, Bugwood.org
licensed under a Creative Commons Attribution-Noncommercial 3.0 License.
licensed under a Creative Commons Attribution-Noncommercial 3.0 License.
Image Number: 1241489
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Damage
Description:
Witches brooms often indicate dwarf mistletoe infection. Brooms result from a proliferation of small twigs on a branch. Douglas-fir is a species which generally form large, distinct brooms in response to dwarf mistletoe infections. Infection tend to be most severe in the lower portions of the crowns.
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Subject
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Subclass: Rosidae |
| Order: Santalales |
| Family: Viscaceae |
| Genus: Arceuthobium |
| Subject: Arceuthobium douglasii Englem. |
Host
| Kingdom: Plantae |
| Phylum: Coniferophyta |
| Class: Pinopsida |
| Order: Pinales |
| Family: Pinaceae |
| Genus: Pseudotsuga |
| Subject: Pseudotsuga menziesii (Mirbel) Franco |
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Image uploaded:
Wednesday, April 14, 2004
Image last updated:
Monday, May 17, 2004
