Southern Research Station

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

Author: Michael, J.L.

Date: 1985

Source: Southern Journal of Applied Forestry. 9: 20-26.

Description: 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.

Keywords: 

View and Print this Publication (483 KB)

Pristine Version:  An uncaptured or "pristine" version of this publication is available. It has not been subjected to OCR (Optical Character Recognition) and therefore does not have any errors in the text. However it is a larger file size and some people may experience long download times. The "pristine" version of this publication is available here:

View and Print the PRISTINE copy of this Publication (656 KB)

Publication Notes: 

• We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
• This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

 Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

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.