Investigations were conducted to determine importance of Fusarium as a pathogen on Douglas-fir seed and containerized seedlings at the Plum Creek Nursery during 1985. Fusarium oxvsnorum was occasionally isolated from necrotic lesions on young germinants that lacked foliar symptoms. Low levels of F. oxvsnorum were detected on three of four seedlots sampled; F. acuminatum was found on only one seedlot. Treatment effects to reduce levels of Fusarium were inconclusive, primarily because of low pathogen levels. Occurrence of Fusarium as a pathogen on this crop was rare in 1985.
This work has no parents.
Downloadable ContentDownload PDF