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Filtering by: Creator Eder, Robert G. Subject Conifers -- Diseases and pests -- Montana

An assessment of dwarf mistletoes in Montana

Creator:

Dooling, Oscar J., Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Dwarf mistletoes reduce tree height and diameter, and thereby cause a reduction in volume production. We estimate that volume reduction in Montana is about 33.2 MM cubic feet per year. Mistletoe effects are problems in some areas because of the demands we have placed on the Forests for goods and...

Resource Type:

Technical Report
Western spruce budworm defoliation trend relative to weather in the Northern Region, 1969-1979

Creator:

Hard, John S., Tunnock, Scott, Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Western spruce budworm defoliated area in the Northern Region has differed significantly across three discrete geographic zones during the past decade. Aerially visible defoliation in northern Idaho increased from 1.7 million acres in 1969 to a high of 2.2 million acres in 1974, and declined to none in 1979. Defoliated...

Resource Type:

Technical Report