Harvest Blocks Research Articles

Spruce Budmoth — A Case History: Opportunities

The spruce budmoth, Zeiraphera sp. is a new pest of white spruce plantations in New Brunswick. Damage to the buds results in deformation of the stem and stunting of growth.Because of the secretive feeding behavior of the larvae, attempts to control populations or provide protection with chemical insecticides have been largely unsuccessful. The nature of the plantation and the biology of the insect provide an attractive opportunity for development of an integrated pest management system. The most promising techniques for immediate application and research and development effort are: reduction of harvest block size; planting of mixed conifer species; spruce budmoth pheromone; mass release of Trichogramma parasites; and further testing of Bacillus thuringiensis.

SIGHTLINE, PERSPECTIVE PLOT, SCOPE–Three Desktop Computer Programs for Forest Landscape Design

Abstract SIGHTLINE, PERSPECTIVE PLOT, and SCOPE are new computer programs to assist the forest manager in predicting the visual consequences of timber harvest. Developed by the U.S. Forest Service for use on desktop computer systems, they can depict (1) terrain and timber stands from a viewpoint, (2) clearcut harvest blocks and ridgelines in true perspective from a viewpoint, and (3) partially cut harvest blocks and associated features in true perspective from a viewpoint.