Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (860 KB bytes)

Title: How to identify brooms in Douglas-fir caused by dwarf mistletoe.

Author: Tinnin, Robert O.; Knutson, Donald M.;

Date: 1985

Source: Res. Note PNW-RN-426. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p

Publication Series: Research Note (RN)

Description: Dwarf mistletoe causes obvious brooms in Douglas-fir. The brooms are the easiest means of recognizing the presence of dwarf mistletoe; however, dwarf mistletoe is not the only cause of brooming in Douglas-fir. Therefore, accurate identification of dwarf mistletoe brooms is important. If no evidence of aerial shoots can be found in the brooms, and if the brooms occur infrequently, are all relatively small, or are found only in trees where a stand has been opened, then dwarf mistletoe is probably not the cause of brooming. Dwarf mistletoe brooms generally have aerial shoots present and are found in stands where brooms of various sizes are common.

Three different types of dwarf mistletoe brooms can be identified in Douglas-fir. Each may affect host trees in different ways, but all are detrimental.

Keywords: broom damage, dwarf mistletoe, Arceuthobium douglasii, disease symptoms, Douglas-fir, Pseudotsuga menziesii

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Tinnin, Robert O.; Knutson, Donald M. 1985. How to identify brooms in Douglas-fir caused by dwarf mistletoe. Res. Note PNW-RN-426. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.