[MAIPC] NNI question

[Clair MIPN Coordinator]

Hi Robert,

A few years ago we (the Midwest Invasive Plant Network) developed an online
database tool that helps compare the effectiveness of various treatment
methods for a number of invasive species. (
https://mipncontroldatabase.wisc.edu/) The effectiveness scores are based
on published data and expert practitioner input. We generally have not
found dramatic differences in the effectiveness of triclopyr (in oil) vs.
glyphosate for cut stump treatments of woody invasives. Of the species you
mentioned, Oriental bittersweet and multiflora rose are included in the
database, and we do not show any difference in effectiveness of cut stump
with triclopyr vs. glyphosate for those species. The database's main
limitation is the number of species it contains, which at the moment is 49,
but we hope to add more in the future.

I'm not myself a land manager, but the ones I work most closely with tend
to use glyphosate over triclopyr for cut stump as the first line of offense
due to concerns with the risk off-target impacts and cost.

Thanks,
Clair

On Tue, Mar 20, 2018 at 7:30 AM, Servis, Robert <
Robert.Servis at montgomeryparks.org> wrote:

> Good morning All,
>
> I sent this yesterday but may have sent it to the wrong list serve
> maipc-bounces at lists.maipc.org, which may not have gone through…(I don’t
> know how these list serves work exactly 😊 ), so I’m trying again today
>
> I just have a quick question that I was hoping someone could answer.
>
> The debate has arisen recently as to *the need to use Triclopyr over
> Glyphosate for cut stump treatments*
>
> Is there any reason to think that Glyphosate used in a cut stump treatment
> at 25% (mixed with water) would *not *work to control the following
> species:  English Ivy, Winter Creeper, Oriental Bittersweet, Porcelain
> Berry or Multiflora rose?
>
>  (as long as the cut stump was made flush and as close to the ground as
> possible.  And also assuming that the timing and weather conditions were
> appropriate for this treatment)
>
>
>
> In my experience of 15+ yrs applying herbicides…a 25% mix of Glyphosate
> for cut/stump treatment, has certainly seemed sufficient to kill these
> species.  The only one of these that I may choose to use anything other
> than glyphosate on may be the Bitter Sweet vines.  For some species such as
> Kudzu, Wisteria, Bittersweet I would tend to use Triclopyr (Garlon 3A) at
> 25% for a cut stump treatment as they have tended to respond a little
> better to Triclopyr than Glyphosate, in my experience.
>
> Given that the site in question here, has a scheduled retreatment or two
> over the next growing season, I do not see the harm in using Glyphosate for
> all initial cut stump treatments, and *if* bittersweet (or anything else)
> seems to be non-responsive under proper cutting/treating methods, then
> bring in the Triclopyr and give that a shot.
>
>
>
> It just seems to me to be unnecessary to use Triclopyr from the beginning,
> but I wanted to pick the brains of my highly respected colleagues in the
> Vegetation Management Field (You all), and see what the response is!
>
> Any thoughts would be greatly appreciated!
>
>
>
> As we know Triclopyr is much more expensive than Glyphosate, and persists
> in the soil longer.   it is always my goal to be as environmentally
> friendly and economical when making necessary pesticide applications, as
> long as the same results can be achieved.
>
>
>
>
>
> Robert Servis
>
> Natural Resource Specialist- Vegetation ecology
>
> M-NCPPC / Park Planning and Stewardship division
>
> Robert.Servis at montgomeryparks.org
>
> (Cell)-  (301)875-2202 <(301)%20875-2202>
>
> (Office)-  (301)962-1343 <(301)%20962-1343>
>
>
>
> _______________________________________________
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>
>


-- 
Clair Ryan
Midwest Invasive Plant Network Coordinator
<http://www.mipn.org>
(630) 719-5649
<http://twitter.com/intent/user?screen_name=MIPN_InvPlants>
<https://www.facebook.com/midwestinvasiveplantnetwork/>
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