Effect of a Foliage Disease Caused by Lirula abietis-concoloris on Growth of White Fir in California. Robert F. Scharpf, Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, CA 94701. Plant Dis. 70:13-14. Accepted for publication 8 July 1985. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1986. DOI: 10.1094/PD-70-13.

An outbreak of Lirula abietis-concoloris occurred in 1982 in a plantation of white fir (Abies concolor) grown for Christmas trees in Northern California. One hundred trees were selected along a transect through affected and unaffected portions of the plantation for growth measurements to study the influence of the disease on tree height and radial growth. Height growth was reduced slightly only in the most seriously diseased trees. No differences were noted in radial growth between diseased and healthy trees.