Seed production and dispersal by dwarf mistletoe in overstory jeffrey pines in California

Robert F. Scharpf; J. R. Parmeter Jr.

Treesearch

Seed production and dispersal by dwarf mistletoe in overstory jeffrey pines in California

Informally Refereed

Authors:

Robert F. Scharpf, J. R. Parmeter Jr.

Year:

1971

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-247. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

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Abstract

Studies in northeastern California showed that the number of dwarf mistletoe (Arceuthobium campylopodum) seeds trapped declined at a logaithmic rate as the distance from overstory source of infection increased. The most seeds were dispersed in the direction of preuading winds. It Is quite likely that storms also aid dispersal. Total numbers of seeds trapped varied from year to year, sugesting good as well as poor years of seed production. A distance of 100 to 150 feet from infected overstopy trees is necessary to prevent infection in regeneration.

Keywords

Arceuthobium campylopodum, seed dispersion, seed flight, windflow, forest damage, Pinus jeffreyi

Citation

Scharpf, Robert F.; Parmeter Jr., J. R. 1971. Seed production and dispersal by dwarf mistletoe in overstory jeffrey pines in California. Res. Note PSW-RN-247. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p