[MAIPC] Microstegium versus Perilla, August 30 2020

[Kathleen Michels]

I just see Perilla spreading EVERYWHERE! In addition to meadows and woods
It's even in our Wheaton urban parking garage  garden far away and isolated
by lots  of asphalt and concrete  from any gardens or natural areas. Like
barberry it's the newest that is just t
exploding over every natural and non natural area  we look!

On Fri, Oct 2, 2020, 8:27 AM Marc Imlay <ialm at erols.com> wrote:

> Reminder. If you see something, say something.
>
>
>
> If you see a massive die off of Beefsteak Mint, please report it for
> potential biological control. Thank you
>
>
>
> Marc
>
>
>
> *From:* frazmo <frazmo at gmail.com>
> *Sent:* Sunday, September 13, 2020 1:30 PM
> *To:* Marc Imlay <ialm at erols.com>
> *Cc:* MAIPC <maipc at lists.maipc.org>; INVASIVES at listserv.umd.edu
> *Subject:* Re: [MAIPC] Microstegium versus Perilla, August 30 2020
>
>
>
> Remember allelopathy! A quick web search seems to show there is some
> literature indicating that Perilla has allelopathic properties. That could
> help to explain  the how/why on the observations of Perilla patches
> appearing to outcompete Microstegium.
>
>
>
> My quick peek also reminded me about the very alarming toxicity of
> Perilla. For example,  it is a serious poisoning hazard to livestock. I
> guess that may help to explain deer avoiding it.
>
>
>
> Cheers, Steve Young, Arlington VA volunteer
>
>
>
> On Fri, Sep 11, 2020, 3:34 PM Marc Imlay <ialm at erols.com> wrote:
>
> Japanese stiltgrass is easy to pull out unlike many of the native
> competitors. One reason it grows fast is because it puts it’s energy into
> growing fast rather than maintaining strong roots. So how can we change
> things so that the native competitors outcompete stiltgrass because they
> have stronger roots?
>
>
>
> *Marc Imlay, PhD Conservation biologist, *
>
> *Board member of the Mid-Atlantic Exotic Pest Plant Council, ,*
>
> *Natural Places Committee for the Maryland Chapter of the Sierra Club*
>
>
>
> *From:* James Remuzzi <james at sustainablesolutionsllc.net>
> *Sent:* Monday, August 31, 2020 12:01 PM
> *To:* Marc Imlay <ialm at erols.com>
> *Cc:* MAIPC <maipc at lists.maipc.org>
> *Subject:* Re: [MAIPC] Microstegium versus Perilla, August 30 2020
>
>
>
> We also noticed this in the field Marc.
>
>
>
> For whatever reason- Perrilla seems to outcompete JSG.
>
>
>
>
> *James R. Remuzzi*
>
> *President*
>
> c:202-746-1649
>
> o:855-478-7824
>
> f: 202-706-6063
>
> *sustainablesolutionsllc.net* <http://sustainablesolutionsllc.net>
>
>
>
>
>
>
>
> On Mon, Aug 31, 2020 at 8:37 AM Marc Imlay <ialm at erols.com> wrote:
>
> Microstegium versus Perilla
>
>
>
> I came across a huge mono-culture of Japanese stiltgrass about 25% of an
> acre. In the middle of the patch was a monoculture  patch of Beefsteak mint
> about 15 feet x 20 feet with almost no stiltgrass. There were two other
> beefsteak patches about 5 x 10 feet with no Microstegium. Is this just one
> non-native invasive outcompeting another one? Or is there another
> possibility that could be explored? For example, reintroduce Mentha
> arvenis. Any potential biocontrol?
>
>
>
> *Marc Imlay, PhD*
>
>
>
> *Conservation biologist, *
>
> *Board member of the Mid-Atlantic Exotic Pest Plant Council, *
>
> *,*
>
> *Natural Places Committee*
>
> *for the Maryland Chapter of the Sierra Club.*
>
>
>
>
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