Observations on the impact of dwarf mistletoe on Douglas-fir in western Montana

Dwarf mistletoe is known to reduce both height and diameter growth and thus reduce the yield of an infested stand. This comparison of two similar stands--one healthy and the other infested--gives an indication of the impact of this parasite. The healthy stand has produced 1.5 times the board foot volume in one-half the time. By predicting the volume of the healthy stand at age 120 (the age of the infested stand), the healthy stand will produce 3.7 times the board foot volume of the infested stand