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Chemi-Pruning Northern Hardwoods

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Chemi-pruning, a new term in American forestry, consists of deadening the lower branches of hardwood trees with chemical spray. The branches are then allowed to decay and drop off. Slash decay studies indicate that this should happen in 4 to 7 years when branches are 2 inches or less in diameter. Three spray mixtures applied with a shoulder-mounted mist blower killed branches to a height of 16 to 20 feet on tree stems. The technique proved safe for susceptible species like oak and is successful on resistant species like maple when used from mid-June to early September. Both 2,4,5-T and an invert emulsion of 2,4,5-T and 2,4-D were used at costs ranging from $5.10 to $6.17 per acre. Chemi-pruning hardwoods is an economical method of improving tree quality which should increase the return from growing hardwoods.
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Document Type: Journal Article

Affiliations: Research Assistant, University of Massachusetts, Amherst

Publication date: 1964-07-01

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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.

    2016 Impact Factor: 1.675 (Rank 20/64 in forestry)

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    June 1, 2016 to Feb. 28, 2017

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