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Observations on Growth of Paraquat-Treated Slash Pine

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Research in use of paraquat to stimulate oleoresin formation in southern pines has resulted in substantial effort to develop commercial application techniques for increasing resin production. Currently there is some concern over the extent to which paraquat treatment affects the subsequent growth and yields of treated trees. In the present study low concentrations of paraquat cation (0.25 percent) injected into two tangential bore holes at the root collar caused no significant reduction in volume growth of 18-year-old slash pine during the two-year posttreatment period prior to harvest. Paraquat concentrations twice this high (0.5 percent), but injected into a single radial bore hole, resulted in approximately 13-percent growth reduction over the same period of time, indicating that higher concentration and lower volume treatments should be avoided. Both the mode of application and concentration used are important variables to consider in developing techniques to enhance oleoresin production without significant loss in volume growth.

Document Type: Journal Article

Affiliations: Associate Professor of Forest Resources, School of Forest Resources, University of Georgia, Athens

Publication date: 1981-08-01

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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