EPPO Global Database

EPPO Reporting Service no. 04 - 1993 Num. article: 1993/73

Economic impact of Inonotus weirii

A study to assess the damage caused by Inonotus weirii (EPPO A1 pest) in douglas-fir stands was carried out in Oregon, US, during a time period of 29 years. The forest (1,1 and 0,9 ha) was regularly monitored for the presence of the fungus and the health condition of the trees. ;It was found that during the period of 29 years I. weirii accounted for 45% mortality of all fir mortality, caused a 29% decrease of the standing Douglas-fir trees and an 18% reduction in the standing volume.


Lawson, T.T. (1992) Impacts from 1960 through 1989 of Phellinus weirii in two douglas-fir stands in Western Oregon.
Presentation at the 1992 APS/MPS Annual Meeting, Portland, OR, USA. Phytopathology 82, 1117