Workshop on New Grass Germplasms
29
Branch chain amino acid synthesis is inhibited by
imidazolinone (Arsenal)
sulfonyl ureas (Oust XP, Telar DF, Escort XP)
The modes of action are not clear for organic arsenicals (cacodylic acid,
MSMA).
Final observations
The use of a quality surfactant is required to obtain the maximum perfor-
mance of most herbicides. A good surfactant will provide enhanced spreading
and coverage of the herbicide with no antagonism to the active ingredient. Also,
it will not disrupt the active transport within the plant to allow the herbicide to
penetrate the leaves and shoots of the plants.
A unique attribute of Escort and Telar is their ability to inhibit seed forma-
tion and the production of viable seed. The impact of these two herbicides on
weed seed is so detrimental to weeds such as Canada thistle, musk thistle, Dyer's
woad, and houndstongue, that you may not find any production of viable seed.
Leafy spurge, which is a major problem in the west, is actually stimulated by
mowing, pulling, or burning. Tordon and, recently, another herbicide, Plateau,
have shown excellent control of this highly invasive weed.
Chemicals are an essential component in a toolbox against weeds.
Techniques for establishing native plants on weed-infested lands
Blair Waldron, Research Geneticist, USDA-ARS, Logan, Utah
This research was performed by Blair L. Waldron, Research Geneticist,
Kevin B. Jensen, Research Geneticist, W. Howard Horton, Rangeland Scientist,
and R. Deane Harrison, Rangeland Specialist, all from the USDA-ARS, Forage
and Range Research Lab, Logan, Utah, working with cooperators Antonio J.
Palazzo and Tim Cary from CRREL, James Kulbeth and Jeff Linn from Fort
Carson, and Pete Nissan and Clark Reames from Yakima Training Center.
Some general tips from Howard Horton for establishing plants on weed-
infested lands are
Remove competition.
Previous Page
