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Pruning dwarf mistletoe brooms reduces stress on Jeffrey pines, Cleveland National Forest, California

Author: Robert F Scharpf; Richard S Smith; Detlev Vogler; Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Publisher: [Berkeley, Calif.] : U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, [1987]
Series: Research paper PSW, 186.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Western dwarf mistletoe (Arceuthobium campylopodum) is a damaging parasite of Jeffrey pines (Pinus jeffreyi) in southern California. Infected branches that develop into brooms are believed to reduce tlee vigor and increase mortality. Brooms were pruned from Jeffrey pines with varying levels of dwarf mistletoe infection and live crown. Many of the trees showed an increase in crown vigor when compared with unpruned  Read more...
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Additional Physical Format: Online version:
Scharpf, Robert F., 1931-
Pruning dwarf mistletoe brooms reduces stress on Jeffrey pines, Cleveland National Forest, California.
[Berkeley, Calif.] : U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, [1987]
(OCoLC)624062772
Material Type: Government publication, National government publication, Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Robert F Scharpf; Richard S Smith; Detlev Vogler; Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
OCLC Number: 16626511
Notes: Distributed to depository libraries in microfiche.
"February 1987"--Title page verso.
Description: ii, 7 pages : illustrations ; 28 cm.
Series Title: Research paper PSW, 186.
Responsibility: Robert F. Scharpf, Richard S. Smith, Detlev Vogler.

Abstract:

Western dwarf mistletoe (Arceuthobium campylopodum) is a damaging parasite of Jeffrey pines (Pinus jeffreyi) in southern California. Infected branches that develop into brooms are believed to reduce tlee vigor and increase mortality. Brooms were pruned from Jeffrey pines with varying levels of dwarf mistletoe infection and live crown. Many of the trees showed an increase in crown vigor when compared with unpruned trees after 5 years. Mortality was not reduced by pruning brooms, except during years of below-normal precipitation. Of the trees that died, most had little live crown, heavy dwarf mistletoe infection, and were also attacked by root diseases or insects or both. Reducing the stress of dwarf mistletoe by broom pruning to no less than 30 percent live crown helps to prevent mortality due to root disease and insect attack during years of below-normal precipitation.

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