[MAIPC] Microstegium versus Perilla, August 30 2020

[frazmo]

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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