Pacific Southwest

Title: Spread of dwarf mistletoe from discrete seed sources into young stands of ponderosa and Jeffrey pines

Author: Parmeter Jr., J. R.

Date: 1972

Source: Res. Note PSW-RN-269. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

Station ID: RN-PSW-269

Description: The maximum distance of spread of dwarf mistletoes from isolated overstory pines into surrounding reproduction averages 120 feet. The rate of infection in young trees declined as distance from the seed source increased and was generally greatest in the direction of prevailing winds. This pattern of infection was similar to the previously reported pattern of seed dispersal. Each isolated, mature pine infected with dwarf mistletoe provided inoculum to infest about 1 acre of pine reproduction. Such residual trees left after fire or logging should be removed.

Keywords: Arceuthobium campylopodum, seed dispersal, forest damage, Pinus jeffreyi, Pinus ponderosa

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Citation

Parmeter Jr., J. R.   1972.  Spread of dwarf mistletoe from discrete seed sources into young stands of ponderosa and Jeffrey pines.   Res. Note PSW-RN-269. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p.