Growth of Loblolly Pine Treated With Hexazinone, Sulfometuron Methyl, and Metsulfuron Methyl For Herbaceous Weed Control

  • Authors: Michael, J.L.
  • Publication Year: 1985
  • Publication Series: Scientific Journal (JRNL)
  • Source: Southern Journal of Applied Forestry. 9: 20-26.

Abstract

Aerial application of 0.25 pounds active ingredient per acre of sulfometuron methyl [Oust(TM), formerly DPX-5648] of 2.0 pounds of hexazinone [Velpar L. (TM)] postmergent in May 1982, resulted in good weed control. Weeds controlled on the silly clay coastal plain soil included pokweed (Phytolacca americana L.) rugweed (Ambrosia sp.). goldenrod (Solidago sp.) and evening primrose (Oenothera sp.). Growth of 1-year old loblolly pine (Pinus taeda L.) seedlings released with sulfometuron methyl or hexazinone was significantly improved in comparison to untreated seedlings. No significant pine mortality was associated with either treament. On similar sites where blackberry (Rubus sp.), honeysuckle (Lonicera japonica Thumberg), and herbaceous weeds are the major problem, application of sulfometuron methyl from per-emergence to the postmergent stage (when weeds are up to 12 to 18 inches in height) is recommended. Hexazinone is recommended as a postmergent treatement for herbaveous weed control. Treament with metsulforon methyl (formerly DPX-T6376-21) did not result in any growth responses significantly greater that untreated seedlings. Impacts of deer browsing on seedlings resulted in a slight height reduction the firest and second growing seasons following planting but by the end of the third growing season browsed seedlings had made up the difference. No diameter differences were associated with the deer browsing at any time during hte study.

  • Citation: Michael, J.L. 1985. Growth of Loblolly Pine Treated With Hexazinone, Sulfometuron Methyl, and Metsulfuron Methyl For Herbaceous Weed Control. Southern Journal of Applied Forestry. 9: 20-26.
  • Posted Date: January 1, 2000
  • Modified Date: August 22, 2006
  • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.