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Autumn Versus Spring Spraying to Combat Insect Pests of Unseasoned Pine Logs

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An 11.7 percent gamma isomer content BHC emulsifiable liquid concentrate was diluted in water to 0.4 percent gamma content, by volume, and applied to live, standing pine (Pinus strobus L.) trees in the autumn or spring. The trees were subsequently felled. Applications with a small sprayer at either season gave 94.4 to 100 percent protection the following summer against pine sawyer beetles (Monochamus spp. [Cerambycidae]) on well sprayed lower trunks. Protection decreased in the higher parts of the trunks which were less heavily sprayed. However, in two different experiments, such decreases were slight on spring-sprayed-and-felled trunks and much more on all autumn-sprayed trunks. This reflects the effect of overwinter weathering on the BHC residue. Protection was slightly better on upper portions of autumn-sprayed-and-felled trunks than comparable heights on autumn-sprayed, spring-felled trunks. This suggests overwinter seasoning of logs may help make them slightly less attractive to Monochamus spp. Protection against pine bark beetles (Scolytidae) followed the same general trends observed for pine sawyer beetles. Other insect pests of unseasoned pine logs were just as scarce in the well sprayed, lower trunks.

Document Type: Journal Article

Affiliations: Associate Professor of entomology in the Department of Entomology and Plant Pathology at the University of Massachusetts, Amherst

Publication date: 1964-06-01

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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.

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