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Re: Atrazine!

Ed and Gale,
Depending upon what other species are present, herbicides can be used. Plateau
herbicide will kill fescue while not harming big blue, indian, little blue.
Sideoats is susceptible to higher rates of Plateau, above 8 ounces. Many forbs
are tolerant as well. Be sure to check a Plateau label before applying. Dormant
season application of Plateau is also an option. Spray when the natives have
gone dormant but the fescue is still actively growing. Dormant season spraying
of Rounup will also control fescue and not harm any grasses or forbs that are
already dormant. In southern IL I would expect you could spray late October,
however be sure anything you want to live is dormant.

Keep the tall grasses growing,
Jef Hodges

Ed and Gale wrote:

> We have a problem with tall fescue in a 2yr old planting.Do you think
> atrazine could be effective and how and when should it be applied?
> Ed Cook
> Southern Illinois
>
> -----Original Message-----
> From: Thomas Rosburg <thomas.rosburg@drake.edu>
> To: prairie <prairie@mallorn.com>
> Date: Saturday, August 21, 1999 8:31 AM
> Subject: RE:Atrazine!
>
> >Back in the late 80's I did research invesigating the effects of fire and
> atrazine on prairie restoration (check Rosburg and Glenn-Lewin 1992, Proc.
> of 12th N.A. Prairie Conference).  I did not see any evidence that the
> prairie species we were working with were susceptible to atrazine.  Of
> course none of the warm-season grasses are susceptible (they're like corn),
> so the main concern is with the forbs.  My sense is that since atrazine
> needs to be picked up by root systems in the upper portion of the soil
> profile (thats why it is effective on annual weedy species), the
> deeper-rooted prairie species don't absorb enough to do much damage.   I
> would not be too concerned.  In fact you may get a better establishment.
> Some of the best results (restoration of prairie species) that I saw in my
> research were on the pastures where atrazine was applied.  It provided great
> control on cool-season grasses.  I really think that, if used properly, it
> is a herbicide that could be used effect!
> > ively in prairie establishment.
> >
> >
> >Thomas Rosburg
> >Dept. of Biology
> >Drake University
> >Des Moines, Iowa
> >515-271-2920
> >thomas.rosburg@drake.edu
> >
> >
> >On 7/19/99, prairie wrote:
> >>Hello fellow prairie enthusiasts,
> >>I am a grad student at Western Michigan University.  >Quite recently,
> >>folks here have begun tossing around the idea of a >prairie restoration
> >>on our campus of about 50 acres--yippie!!!  We've >been putting together
> >>species lists, burning regimes, and coming up with >all sorts of research
> >>projects.  The administration is very anxious to >get something planted
> >>on this open area that for the past many years has >been farmed.  The
> >>original plan was to seed it this fall.  Trouble >is, we just discovered
> >>that it was treated with Atrazine last spring.  >We've been doing some
> >>research on this troublesome chemical, and it seems >that it breaks down
> >>in about 2 years or so on the surface, but leaches >down and takes much
> >>longer to break down at deeper levels of soil.  How >have you who have
> >>done restorations/plantings dealt with this?  Can >we go ahead and plant
> >>this coming spring, and then hope that the Atrazine >will break down
> >>quickly enough that by the time our forbs' roots >reach down that far,
> >>they will not be affected?  We'd greatly appreciate >advice from folks
> >>who've dealt with this specifically for prairie >plants.
> >>
> >>Thanks much,
> >>Theresa Mau-Crimmins
> >>x93mau@wmich.edu
> >>
> >>---------------------------------------------------
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> >>
> >>
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> >> Date: Mon, 19 Jul 1999 11:06:22 -0400
> >> From: Theresa Mau-Crimmins <theresa.mau@wmich.edu>
> >> Subject: Atrazine!
> >> Sender: owner-prairie@mallorn.com
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