[MAIPC] Microstegium versus Perilla, August 30 2020

[INFO Dumbarton Oaks Park Conservancy]

Our experience is stiltgrass doesn't like deep shade which a dense patch of
perilla creates. Same occurs under wood nettles and other very dense plants
such as wineberry. Remove the perilla and stiltgrass will show up
immediately.
Ann

On Mon, Aug 31, 2020 at 12:01 PM James Remuzzi <
james at sustainablesolutionsllc.net> wrote:

> 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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