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An Experiment in the Use of Sodium Arsenite in Thinning Ponderosa Pine

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Abstract:

Experience obtained over the past few years on the behavior of trees killed with sodium arsenite has suggested its use as a means of thinning, with the distinct advantage of eliminating the amassment of large sources of food for cambium-eating insects. The breeding and multiplication in slash of secondary insects that may become primary for a generation or more when thinning is not continuous or on contiguous areas, constitutes a hazard that must be reckoned with in the pine forests of the Southwest. When thinning is performed by the Danish or crop-tree method, the need for adopting some protective measure is exceptionally acute as thinning is concentrated about a relatively few selected trees that represent the cream of the stand, and according to present practice also involves an investment in pruning. It is obvious that the movement of insects from slash to even a portion of the crop trees would not only be costly but would result in an irreparable loss.

Document Type: Journal Article

Affiliations: Southwestern Forest and Range Experiment Station

Publication date: 1939-03-01

More about this publication?
  • 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)

    Average time from submission to first decision: 39.6 days*
    June 1, 2016 to Feb. 28, 2017

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