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The Effects of Formulation, Timing, and Method of Hexazinone Application of Survival and Growth of Ponderosa Pine Seedlings Item Info

Attempts to reforest disturbed sites with native conifers have varying degrees of success due to the limiting effects of herbaceous vegetation on the survival and growth of conifer regeneration. Hexazinone (3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5- triazine-2,4(1H,3H)-dione) is a broad spectrum herbicide that has proven effective in controlling many herbaceous and woody weeds at application rates tolerated by most native conifers. This study examined the effects of formulation, timing, and method of hexazinone application on survival and growth of 1-10 containerized ponderosa pine seedlings. Pre-plant and post-plant applications of the liquid (Velpar L) and granular (Pronone 10G) formulations of hexazinone applied both as a spot and broadcast treatments were evaluated. Hexazinone was effective in controlling competing herbaceous vegetation on forest sites and thus improved the growth and vigor of conifer regeneration. Pre-plant treatments appeared to be preferable in decreasing the potential for phytotoxic effects of the herbicide on desired crop species. Fall applied treatments, particularly of Velpar L, consistently resulted in significantly better tree performance than other hexazinone treatments or untreated controls.

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Title:
The Effects of Formulation, Timing, and Method of Hexazinone Application of Survival and Growth of Ponderosa Pine Seedlings
Creator:
Jeheber-Matthews, Susan
Date Created:
1987-11
Description:
Attempts to reforest disturbed sites with native conifers have varying degrees of success due to the limiting effects of herbaceous vegetation on the survival and growth of conifer regeneration. Hexazinone (3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5- triazine-2,4(1H,3H)-dione) is a broad spectrum herbicide that has proven effective in controlling many herbaceous and woody weeds at application rates tolerated by most native conifers. This study examined the effects of formulation, timing, and method of hexazinone application on survival and growth of 1-10 containerized ponderosa pine seedlings. Pre-plant and post-plant applications of the liquid (Velpar L) and granular (Pronone 10G) formulations of hexazinone applied both as a spot and broadcast treatments were evaluated. Hexazinone was effective in controlling competing herbaceous vegetation on forest sites and thus improved the growth and vigor of conifer regeneration. Pre-plant treatments appeared to be preferable in decreasing the potential for phytotoxic effects of the herbicide on desired crop species. Fall applied treatments, particularly of Velpar L, consistently resulted in significantly better tree performance than other hexazinone treatments or untreated controls.
Document Type:
Thesis
Library Call Number:
SD397.P6115J44 1987
Subjects:
Flat Creek hexazinone herbicide ponderosa pine pinus ponderosa application formulation method silviculture
UIEF Unit:
Flat Creek
Location:
UIEF; Flat Creek
Latitude:
46.866081
Longitude:
-116.734095
Department:
Department of Forest Resources
Type:
text
Format:
application/pdf

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Preferred Citation:
"The Effects of Formulation, Timing, and Method of Hexazinone Application of Survival and Growth of Ponderosa Pine Seedlings", UIEF Research Exchange, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/uief/items/uief_0042.html
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In copyright, educational use permitted.
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http://rightsstatements.org/vocab/InC-EDU/1.0/
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