. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Spruce Bud worm Figure 7. Volume of spruce and fir killed compared to pulpwood harvested in Maine from 1979 to 1983. Year | Volume harvested O Volume killed Q Projected loss 1983 1982 1981 1980 1979 Million , , , , , , , , , , , Cubic Feet 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Source: Data provided by Maine Bureau of Forestry. Figure 8. The Fettes Method of calculating the percen
. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Spruce Bud worm Figure 7. Volume of spruce and fir killed compared to pulpwood harvested in Maine from 1979 to 1983. Year | Volume harvested O Volume killed Q Projected loss 1983 1982 1981 1980 1979 Million , , , , , , , , , , , Cubic Feet 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Source: Data provided by Maine Bureau of Forestry. Figure 8. The Fettes Method of calculating the percentage of foliage removed to determine which stands require protection. F-705646. 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 Loomis, Robert C; Tucker, Susan; Hofacker, Thomas H; United States. State and Private Forestry; United States. Forest Pest Management. [Washington, D. C. ] : The Service
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