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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
Full Text:: . Plant Disease 68:826. Dubreuil, S. H. 1982. Western larch needle blight and needlecast in the N. Reg

Creator:: James, Robert L. and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: , COUER D'ALENE, IDAHO S b I St MI • A-3 • R. L. James Plant Pathologist INTRODUCTION Western larch

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:: mortality. INTRODUCTION Western larch (Larix pccidentalis Nutt.) seedlings are an important crop, and

Creator:: Tunnock, Scott, Bousfield, Wayne E., and United States. Forest Service. Northern Region
Abstract:: An evaluation during the summer of 1985 showed that parasites were still exerting control on the larch casebearer on the Flathead NF. Parasitism ranged from 4 to 60 percent and averaged 25.2 percent in the 12 areas surveyed. Four species of parasites were involved. The most abundant was Agathis pumila...
Resource Type:: Technical Report
Full Text:: the larch casebearer parasite, Mathis pumila, in Idaho, Montana, Washington, Oregon, and British

Creator:: James, Robert L., Gilligan, Carma J., and United States. Forest Service. Northern Region
Abstract:: Mortality of western white pine transplants used to assess resistance to blister rust at the USDA Forest Service Nursery in Coeur d'Alene, Idaho was likely due to extensive root infection by Pythiva app. Severity of foliar symptom production was significantly correlated with extent of root system colonization by these fungi....
Resource Type:: Technical Report
Full Text:: SERVICE NURSERY, COEUR D'ALENE, IDAHO by R. L. James, Plant Pathologist and C. J. Gilligan, Biological

Creator:: Dooling, Oscar J., Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: for dwarf mistletoe In Douglas-fir (DF), western larch (WL), and lodgepole pine (LP) on the Flathead

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
Full Text:: relatively high blister rust hazard in both northern Idaho and northwestern Montana. Several thousand

Creator:: James, Robert L., United States. Forest Service. Northern Region, and United States. Forest Pest Management
Abstract:: Investigations of containerized western white pine, western larch, and Douglas-fir seedlings at the Western Forest Systems Nursery in Lewiston, Idaho, revealed that many seedlings were colonized with Fusarium oxysporum although they lacked severe disease symptoms. White pine seedlings were also infected with Pythium spp., probably as a result of sowing...
Resource Type:: Technical Report
Full Text:: Pathologist • ABSTRACT Investigations of containerized western white pine, western larch, and Douglas-fir

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
Full Text:: WESTERN LARCH, DOUGLAS-FIR, GRAND FIR, SUBALPINE FIR, AND PONDEROSA PINE • SEEDLINGS AT THE USDA FOREST

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region
Abstract:: A rare outbreak of hemlock sawfly, Neodiprion tsugae Middleton, was detected in August in drainages near the Canadian border in Idaho infesting several thousand acres. Some stands of western hemlock and subalpine fir were severely defoliated. Understory Engelmann spruce trees were lightly defoliated. The sawfly overwinters in the egg stage...
Resource Type:: Technical Report
Full Text:: , Idaho (fig. 1). Several thousand acres of mixed western hemlock, subalpine fir, and Engelmann spruce

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