[MAIPC] Summer Invasives.

[Marc Imlay]

I have found this year that the Japanese Stiltgrass is no longer
controllable over 400 acres of parkland  in spites of extensive use of
pre-emergents in March. At the 200 acre Swann Park beefsteak is no longer
controllable. And many folks have found the same for Wavyleaf basketgrass. .
Twenty years ago it was very doable to save all our parks. So mid-late
Summer invasives is very sad, especially since stiltgrass is so totally
destructive and replaces the other ground vegetation.  

 

I remind myself that I have been successful with invasives for the rest of
the year including garlic mustard and Lesser Celandine. For the late Summer
invasives , biological control remains our best hope, both effective host
specific from Eurasia, etc. as well as waiting for native biological
controls to pop up as with Ailanthus after 200 years. . 

 

From: Imlay, Marc 
Sent: Thursday, August 25, 2016 10:08 AM
To: 
Subject: RE: Mniutes from August 2016 board meeting

 

A top issue for invasive plant control folks is should we continue to remove
all the Asiatic bittersweet, bush honeysuckle,  juvenile garlic mustard,
Japanese barberry, porcelain berry, beefsteak, multi flora rose,  mimosa,
wineberry,  and mile-a minute. Or switch our resources to Japanese Stilt
grass and wavyleaf basket grass that have become so much more abundant and
destructive at our high priority sites. 

 

 

Marc Imlay, PhD, Chair, MAIPC Biological control working Group Conservation
biologist, 

Park Ranger Office, Non-native Invasive Plant Control coordinator.
<mailto:Marc.Imlay at pgparks.com> Marc.Imlay at pgparks.com

(301) 442-5657 cell  Natural and Historical Resources Division

The  Maryland-National   Capital   Park  and Planning Commission

 

Marc Imlay, PhD 
Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland
Chapter of the Sierra Club.

 



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