[MAIPC] Mugwort Control

[Moore, April -FS]

Do you find a particular percent solution of glyphosate better than another?

Thanks.

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Nathan Hartshorne
Sent: Friday, March 27, 2020 4:59 PM
To: Gover Jr., Arthur Earl <aeg2 at psu.edu>
Cc: MAIPC Listserve (maipc at lists.maipc.org) <maipc at lists.maipc.org>
Subject: Re: [MAIPC] Mugwort Control

We have a surprising range of sprout times from Virginia up to northern PA/jersey as well as other mountainous regions, so that does not surprise me yours hasn't sprouted.  Where I am in Philly it is a few inches tall already.  So there is certainly no problem waiting until yours has sprouted and then let it get a couple inches.

I have used a few different herbicides including glyphosate and clearcast, but have no personal preference.  It takes a long time with each different one to get a preference, and I did not have that, so I have no particular recommendation.  My recommendation really was just about the strategy to start early.  Mugwort can take over a field if ignored, and spraying only in the fall after it seeds has not shown me any particular usefulness.  So if you hit it when it is young short, it is easy to avoid hitting other plants, helps suppress mugwort height, and does kill a fair percent of the plants.

On Fri, Mar 27, 2020 at 4:05 PM Gover Jr., Arthur Earl <aeg2 at psu.edu<mailto:aeg2 at psu.edu>> wrote:
Hi, Nathan.

Could you elaborate on the current stage of the mugwort your addressing. In Central PA, mugwort emergence is in the future.

What material are you using?

Thanks.

Be well.

Art

Penn State Wildland Weed Management
116 ASI Building
University Park, PA  16802

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> On Mar 27, 2020, at 15:23, Nathan Hartshorne <nshartshorne at gmail.com<mailto:nshartshorne at gmail.com>> wrote:
>
> Hi All,
>
> I just wanted to say that in the past I have had success reducing mugwort invasions by spraying at this point of the year when it is still short and a lot of the natives still haven't even shown their sprouts.  Now I got maybe as little as 20% killed and the rest grew back, but that 20% was very helpful in thin areas.  Also, the mugwort that did resprout grew shorter and was significantly easier to manage later in the season when I hit it again.  If you have ever waded through a field of 5 ft tall mugwort trying to spray it with a backpack sprayer, it is not easy.  Anyways, just some advice.
>
> Best,
> Nathan
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