. Research for tomorrow's forests : 1983 research accomplishments. --. Forests and forestry Research United States. Predicting Forest Stand Losses to Gypsy Moth The gypsy moth is one of the most challenging problems facing forest managers in the Northeast today. People attempting to cope with the pest need help in predicting and evaluating its impacts so they can decide whether to attempt control efforts and where to concentrate them. Some techniques for predicting forest stand losses to gypsy moth have already been developed by the Northeastern Station in cooperation with State and Private Fo
. Research for tomorrow's forests : 1983 research accomplishments. --. Forests and forestry Research United States. Predicting Forest Stand Losses to Gypsy Moth The gypsy moth is one of the most challenging problems facing forest managers in the Northeast today. People attempting to cope with the pest need help in predicting and evaluating its impacts so they can decide whether to attempt control efforts and where to concentrate them. Some techniques for predicting forest stand losses to gypsy moth have already been developed by the Northeastern Station in cooperation with State and Private Forestry, Northeastern Area. These include the use of easy-to- measure stand characteristics. Typical of the models used for prediction is an equation for estimating the rate of change in timber value for forest stands exposed to an outbreak. The important stand measurements in this equation are ones easily taken by a forest manager—basal area per acre in tree species that the gypsy motn tends to avoid, percentage of stand basal area in trees to inches in diameter, and percentage of stand basal area in trees with poor crowns. Impacts could become more serious as the pest spreads south and west into forests where oaks are more common and timber quality is better. In an attempt to measure impacts in advance of gypsy moth infestation, scientists have installed some 600 field plots in the heart of Pennsylvania's oak coun- try. Besides learning whether these stands have a greater potential for economic loss, researchers will be able to refine existing models for better prediction of the insect's Gypsy moth infested forest plots are remeasured twice a year to gather data on growth, mortality, and stand changes. 43. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Forest Service. [Was
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