Index Catalog // ScholarsArchive@OSU

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: Causes of mortality of containerized western larch seedlings at the Champion Timberlands Nursery, Plains, Montana, were investigated. Seedlings were rated for disease severity based on extent of foliar decline symptoms and fungal isolations made from their roots. Isolations were also made from selected larch seed. Consistent associations between root colonization...
Resource Type:: Technical Report
Full Text:: ABSTRACT \f o,_ tc‘ --,\.. ''261Z9GNI by Robert L. James• • • • • • AT-11-144 4A5 no. 8(9- 110

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: 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...
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: Containerized western larch, Douglas-fir, grand fir, subalpine fir, and ponderosa pine seedlings which displayed disease symptoms were sampled for presence of Fusarium spp. Seedlings from 33 seedlots within the Northern Region were sampled. Major types of diseases included post-emergence damping-off, root disease (late damping-off), and cotyledon blight. Fusarium oxysporum was...
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: Five seedlots of Colorado blue spruce and three seedlots of Black Hills spruce were sampled for Fusarium contamination. All seedlots contained some seed and/or debris with Fusarium. Levels of contamination were greatly reduced by treating seed with running water rinses for 48 hours or with chemical sterilants such as sodium...
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: Needlecast caused by Meria laricis caused serious losses of 2-0 bareroot western larch during 1983 at the USDA Forest Service Nursery, Coeur d'Alene, Idaho. Cool, wet weather throughout the spring and summer of 1983 was ideal for disease buildup and spread. Control attempts with fungicides were largely unsuccessful because of...
Resource Type:: Technical Report

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Abstract:: Mortality of containerized western white pine seedlings outplanted on the Bonners Ferry Ranger District, Idaho Panhandle National Forests, was probably due to extensive root infection by Fusarium oxysporum. Diseased seedlings had chlorotic foliage, needle tip dieback, and severe twisting of the needles that indicated wilting. Most root tips of diseased...
Resource Type:: Technical Report

Creator:: Byler, James W., James, Robert L., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Two methods attempting to stop marginal spread of a root disease center in Douglas-fir were evaluated within the Flathead Indian Reservation, Montana. The first method was to cut all living trees within a 1-chain strip outside the edge of the infestation. The second method was to uproot all trees for...
Resource Type:: Technical Report

Creator:: James, Robert L., Byler, James W., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: A root disease evaluation was completed for the Ducharme logging unit near the southeast corner of Flathead Lake. Extensive root disease was found on Douglas-fir throughout the unit. The major pathogen on the site was Armillaria meilea. Black stain (Verticicladiella sp.) was isolated from one tree which was also infected...
Resource Type:: Technical Report

ScholarsArchive@OSU