Dwarfmistletoe reduces height growth even more than it reduces diameter growth. Theoretical calculations indicate that impact of infection on volume growth will be underestimated by about 40 percent if impact on height growth is ignored and by about 10 percent if impact is assumed to be the same on height growth as on diameter growth. Stunting of infected trees makes infested areas appear to be of poorer site quality than they really are. Trees stunted by infection contain approximately the same volumes as uninfected trees of the same diameter and height.
Document Type: Journal Article
Associate Plant Ecologist, Pacific Northwest Forest and Range Expt. Sta., Forest Service, U.S. Dept. of Agric., Portland, Oregon