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Filtering by: Subject Douglas fir -- Fertilizers Subject Douglas fir -- Diseases and pests Subject Douglas fir -- Seedlings

Pathogenicity of Alternaria alternata on young Douglas-fir and Engelmann spruce germlings

Creator:

James, Robert L., Woo, John You, and United States. Forest Service. Northern Region

Resource Type:

Technical Report

Full Text:

-FIR AND ENGELMANN SPRUCE GERMLINGS e by R. L. James 1/ Plant Pathologist • • and INTRODUCTION
Pathogenicity of Fusarium from forest seedling nurseries on Douglas-fir and ponderosa pine seedlings

Creator:

James, Robert L. and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Eighteen isolates of Fusarium comprising four species (F. oxysporum, E. avenaceum, E. acuminatum, and F. sambucinum) isolated from diseased conifer seedlings from nurseries were tested for pathogenicity on Douglas-fir germlings. Three of the most pathogenic F. oxysporum isolates on Douglas-fir germlings were also tested on ponderosa pine germlings and older...

Resource Type:

Technical Report

Full Text:

ON DOUGLAS-FIR AND PONDEROSA PINE SEEDLINGS by R. L. James, Plant Pathologist, Cooperative Forestry