[MAIPC] Japanese Stilt grass

Fri Oct 1 05:05:33 PDT 2021

Has anyone tried to spray stilt grass with an "attractant" that may induce deer browsing?  I'm not sure what deer like in the sense of taste but a spray of "sugar" may get them to at least browse the plant which from my observations they appear to shy away from? Just a thought.

[cid:image001.png at 01D7B69B.1B153600]

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Marc Imlay
Sent: Thursday, September 30, 2021 4:12 PM
To: INVASIVES at LISTSERV.UMD.EDU; 'MAIPC Listserve' <maipc at lists.maipc.org>
Subject: [MAIPC] Japanese Stilt grass

Today at Ruth B. Swann Park in Charles County Maryland, I came across about a quarter acre that had only dead stilt grass from last year. The dead stilt grass was very thick but there was no live stilt grass or any other green vegetation including beefsteak plant, Perilla frutescens.  There was a lot of Perilla about 300 feet away.

Marc Imlay

From: Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>>
Sent: Tuesday, March 23, 2021 7:16 AM
To: 'Kit Britton' <kitbritton at gmail.com<mailto:kitbritton at gmail.com>>
Subject: RE: Private: Re: Successional Change at Fraser Preserve with Margaret Chatham - Thu, 03/11/2021 7:30pm-9:00pm

If it kills the seedbank and you remove Perilla, the stilt grass would not come up at that location the next year (unless it came in from elsewhere).

From: Kit Britton <kitbritton at gmail.com<mailto:kitbritton at gmail.com>>
Sent: Tuesday, March 23, 2021 6:57 AM
To: Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>>
Subject: Re: Private: Re: Successional Change at Fraser Preserve with Margaret Chatham - Thu, 03/11/2021 7:30pm-9:00pm

I don't know.  I'm trying to think how to figure that out.

 I think if I look for the first spring/early summer growth of both plants, there would be the clue.  Is that right?

Killing the seedbank would mean perilla comes up mostly alone except for stiltgrass seed that blows in late the prior year.So maybe that would be a smaller "crop". So the result is the stiltgrass that year is sparse.

One thing is perilla is usually still carrying and presumably dropping seed well after the stiltgrass seems finished.

I will watch patches of perilla on TRI this spring/summer.

Kit

On Mon, Mar 22, 2021 at 8:53 AM Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>> wrote:
Does the Perilla kill the seed bank or just the emerging stiltgrass? Marc

From: Kit Britton <kitbritton at gmail.com<mailto:kitbritton at gmail.com>>
Sent: Sunday, March 14, 2021 9:20 PM
To: ialm at erols.com<mailto:ialm at erols.com>
Subject: Private: Re: Successional Change at Fraser Preserve with Margaret Chatham - Thu, 03/11/2021 7:30pm-9:00pm

>From observation in woodlands environments at Theodore Roosevelt Island and in Donaldson Run Park it appears that Perilla may have a toxic effect on Japanese Stiltgrass which will not grow under the Perilla plants or is very sparse.  Also on a larger scale at Gambrill State Park in Maryland this was obnserved last summer.

Kit Britton
ARMN Master Naturalist

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