. 1980-1990 national program of research for forests and associated rangelands. --. Forests and forestry Research United States; Rangelands Research United States. Forest Protection. Forest Protection Insects, diseases, and wildfires kill an estimated billion cubic feet of timber annually—an amount equal to one-fifth the annual har\est. Insects and diseases also cause approximately the same amount of annual growth loss. In addition to these damages, the three factors together impair esthetic values, recreational op- portunities, watersheds, and wildlife habitat. In rural and urban areas, i
. 1980-1990 national program of research for forests and associated rangelands. --. Forests and forestry Research United States; Rangelands Research United States. Forest Protection. Forest Protection Insects, diseases, and wildfires kill an estimated billion cubic feet of timber annually—an amount equal to one-fifth the annual har\est. Insects and diseases also cause approximately the same amount of annual growth loss. In addition to these damages, the three factors together impair esthetic values, recreational op- portunities, watersheds, and wildlife habitat. In rural and urban areas, insects and disease may cause a significant reduction in real estate \alues. Forest protection research is focused on minimizing these losses. Increasingly, research is concentrating on pre\enti\e measures as well as control methods. Research problem area 1980 1985 1990 Scientist Years Control of insects affecting forests Control of diseases, parasites, and nematodes affecting forests Prevention and control of forest and range fires Total 46. 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. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
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