In June and July of 1974, 427,000 acres of Douglas-fir and grand fir timberlands in Oregon, Washington, and Idaho were treated with DDT to control the Douglas-fir tussock moth. This was the largest all-helicopter forest spray project ever carried out in the United States and required cooperation by many state and federal agencies, universities, and private landowners. Almost total insect mortality occurred immediately after treatments were applied. Defoliation ceased almost completely, and a high proportion of foliage was saved.
Document Type: Journal Article
Forester, Insect and Disease Management, USDA Forest Service, Region 6, Portland, Oregon
Publication date: February 1, 1976
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The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.