Planning Insecticide Application and Timber Harvesting in a Spruce Budworm Epidemic
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- Dimond, John B.
USDA Forest Service - Seymour, Robert S.
United States Department of Agriculture - Mott, Gordon D.
USDA Forest Service
Until about 1980, spray blocks in spruce budworm protection programs tended to be large, often encompassing several townships, and were geometrically regular in outline. Block design was based on the cost of operating spray aircraft; there were few turns and little flying with spray booms turned off. In the process, stands with relatively few budwonn host trees were sprayed along with the highly vulnerable, well-stocked spruce-firflats . lt was believed that any killing of budworms was useful, reducing the likelihood that treated stands would be reinfested.
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