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    Author(s): John R. Parmeter; Robert F. Scharpf
    Date: 1982
    Source: Res. Paper PSW-RP-165. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; 7 p
    Publication Series: Research Paper (RP)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (858 KB)


    In fir stands infested with dwarf mistletoe (Arceuthobium abietinum Engelm. ex Munz.), the majority of susceptible understory trees had one or more stem infections. Most stem infections entered through infected branches and grew slowly around the stem, resulting in small amounts of decay or stem killing. Decay was not found in trees less than 50 years old. Despite high rates of stem infection, low rates of decay and stem girdling suggest that stem infections will not lead to serious losses in well-managed young-growth stands. Overstory removal and proper spacing to promote rapid height growth and early crown closure are recommended to reduce damage from stem infection.

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    Parmeter, John R., Jr.; Scharpf, Robert F. 1982. Stem infection by dwarf mistletoe in California firs. Res. Pap. PSW-RP-165. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 7 p.


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    (Arceuthobium abietinum, dwarf mistletoe, Abies concolor, Abies magnifica, white fir, red fir, stem decay, stem infection, sivicultural management

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