Douglas-fir (Pseudotsugamenziesii(Mirb.) Franco) trees, both healthy and infected byInonotussulphurascens(Pilát) M.J. Larsen, F.F. Lombard, & J.W. Clark (Phellinusweiriisensu lato), were fumigated with chloropicrin or methylisothiocyanate at a site in the Oregon Coast Range. Ten growing seasons later, vegetation cover on plots around treated and untreated individuals was evaluated to determine fumigant effects on nontarget plants. Total plant cover and individual species cover forBerberisnervosaPursh andStokesiellaoregana(Sull.) Robins were significantly reduced in the chloropicrin treatment plots. The dominant shrub,GaultheriashallonPursh, was little affected in chloropicrin plots. Slightly greater species richness andRubusursinusCham. & Schlecht. cover in chloropicrin plots were attributed to higher light levels and other factors associated with reduced shrub cover on the treated plots. Multivariate analysis showed little overlap in plant community structure between chloropicrin-treated and control plots. Detection of effects due to the methylisothiocyanate treatment was hindered by the lack of strictly paired control trees. The results are discussed in relation to the retrospective nature of the study.