[MAIPC] update on times are changing

[Marc Imlay]

1.	Do a good job at selected parks so removal of one invasive does not
just cause other invasive species to take over. Also, evaluators are excited
to see the natives come back and then they support the NNI program. I
started with Swann Park described below and we have done the same for LPBP,
Cherry Hill Park, Magruder Woods and Clearwater NC. 

 

2.	It may be too late at LPBP this year as it is at Swann Park for
Japanese Stiltgrass.   

 

From: Marc Imlay <ialm at erols.com <mailto:ialm at erols.com> > 
Sent: Friday, June 07, 2019 11:06 AM
To: INVASIVES at LISTSERV.UMD.EDU <mailto:INVASIVES at LISTSERV.UMD.EDU> 
Subject: update on times are changing

 

Update on times are changing. 

 

Today I surveyed 5 acres in the center of the 200 acre Swann Park in Charles
County for garlic mustard and co-mingled other invasive plant species. I
removed the 5 adult garlic mustard plants, 3 juvenile Japanese barberry, and
about ten small wine berry. There were no other invasive species except for
Japanese Stiltgrass which is monocultures over about ¼th of the 5 acres. It
was almost entirely removed from the 200 acre park 20 years ago. On the
perimeter of the park oriental  bittersweet and Chinese privet has heavily
invaded although they were eradicated from the entire 200 acre park 20 years
ago. Unfortunately, we have to give up removing the JSG and wait for a
biocontrol to evolve. 

 

 

3.	Because Asiatic Bush Honeysuckle increases the risk of Lyme disease
from deer ticks by a factor of 10, let us remove it everywhere with a focus
on where visitors come as in Lake Artemisia The other NNI to remove and not
plant is Japanese barberry which increases the risk by 8.8 fold. 

       

4.	Mke Ellis is on the look out for a native bio control of Japanese
Stiltgrass such as he found with slugs. If a devastating impact is found we
have been requested to report the finding to Matt Tancos with ARS. 

From: Tancos, Matthew - ARS <Matthew.Tancos at ARS.USDA.GOV
<mailto:Matthew.Tancos at ARS.USDA.GOV> > 
Sent: Wednesday, March 27, 2019 4:03 PM
To: ialm at erols.com <mailto:ialm at erols.com> ; Jil Swearingen
<jilswearingen at gmail.com <mailto:jilswearingen at gmail.com> >
Subject: Biological control of invasive weeds

 Hello Marc and Jil,

 Things have started to settle down with the new position, and I wanted to
reach out to the both of you. Just to clarify, our mission has switched from
investigating foreign pathogens to exclusively focusing on endemic pathogens
to control invasive weed populations. Due to my limited staff and resources,
I won’t be able to target all of these important invasive species at once
(multiple stakeholders). However, I plan to focus my efforts on several key
players and hope we are able to identify some promising pathogens.
Identifying a potential pathogen will require being at the right place at
the right time when disease initially develops; however, I remain
optimistic!  We are currently evaluating some pathogens for swallow-wort,
Japanese hop, mile-a-minute, oriental bittersweet, and Japanese honeysuckle.
I would really like to target invasive weeds colonizing wetland and riparian
environments due to the importance of the Chesapeake Bay to our region. 

 I think it will be very challenging to identify a promising pathogen on
wavyleaf basketgrass due to its recent introduction. Approximately 30 years
isn’t a lot of time for a new pathogen to emerge, but maybe I’m wrong. I
would also be interested in looking at Ranunculus ficaria due to its ability
to really outcompete in wetland/riparian environments. I can’t make any
promises as to finding a potential pathogen, but we can give it a shot! Also
the more eyes we have looking for severe dieback events, the better our
odds.

 Best,

-Matt

           5. Winter and late Fall is the best time to save all our trees
from evergreen vines including Japanese honeysuckle and English Ivy. It is
ideal to have volunteers do this before tick season in Mid-April.  And it is
so easy to find all of them at that time. 

           6. OK all. Please share your ideas. 

 Marc Imlay

Natural Places Chair of the Maryland Chapter Sierra Club. 

 

 

 

 

 

 

 

 



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