Stand Dynamics Documents

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Susceptibility of Balsam Fir to Spruce Budworm Defoliation as Affected by Thinning

Problem Addressed: Spruce budworm defoliation of balsam fir.
Goal(s)/Objective(s): Quantify defoliation levels in treated and control plots in order to determine what effect, if any, thinning had on the susceptibility of balsam fir.
Key Findings: Susceptibility of balsam fir to spruce budworm defoliation was not affected after thinning in coniferous and hardwood forest types.
Views: 778
Downloads: 5
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The Presettlement Forest and Natural Disturbance Cycle of Northeastern Maine

Problem Addressed: The unknown character of the presettlement forests in New England.
Goal(s)/Objective(s): Estimate the species composition of the presettlement forests, to interpret their successional status, and to provide evidence on the frequency of large-scale natural disturbances.
Key Findings: Severe disturbance was fairly common in the presettlement forest of northern Maine, and data from the land surveys and individual virgin stands likewise indicate that most of the land surface supported climax stands that were frequently all-aged.
Views: 1021
Downloads: 4
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Spruce Budworm Damage Assessment with 35mm Air Photos

Problem Addressed: Spruce budworm
Goal(s)/Objective(s): Assist forest managers at all levels in assessing damage and estimating possible future damage due to spruce budworm activity and provide an index which can be used to rank stands in terms of relative probability of future damage.
Views: 1025
Downloads: 1
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A Study of the Cost of Strip Cutting Black Spruce Stands in Northern Ontario

Problem Addressed: Spruce budworm
Goal(s)/Objective(s): Deal with the impact of strip cutting on planting, layout and supervision, in-strip operations, roadside processing, movement of mean and materials, and roads.
Key Findings: While the effects of strip cutting on silvicultural treatment costs are not included in the terms of reference of this study, discussions with foresters suggest that there may be some.
Views: 905
Downloads: 2
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The Significance of Non-Host and Alternative Host Tree Species on Populations of Larval and Spruce Budworm, with Emphasis on Improving Sampling Techniques

Problem Addressed: Spruce budworm
Goal(s)/Objective(s): Evaluate spruce budworm population and defoliation levels on host species of differing forest types in Maine.
Key Findings: Spruce budworm moths showed a distinct preference for white spruce foliage. Egg to instar-VI budworm survival was highest in the forest type which was a mixture of white spruce and balsam fir. Survival was lowest in the study area with a mixture of red spruce, balsam fir, and hemlock.
Views: 744
Downloads: 1
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