[MAIPC] FW: Stilt grass question

[Ken Bawer]

In Muddy Branch stream valley (Montgomery Co, MD) I noticed a Skunk Cabbage plant with no stilt grass growing around it. In an effort at citizen "science" I collected a leaf, blended it up with water, and sprayed in on some stilt grass. However, the mix just rolled off. Clearly I'm missing some key ingredient.

Ken Bawer

Date: Mon, 28 Sep 2015 08:03:11 -0400
From: jake_hughes at nps.gov
To: ialm at erols.com
CC: tomnjan2 at comcast.net; INVASIVES at listserv.umd.edu; maipc at lists.maipc.org
Subject: Re: [MAIPC] FW: Stilt grass question

My guess is that light limitation is at work.  Cole and Weltzin found the same pattern with paw paw (Asimina triloba):
Cole, P.G. and J.F.
Weltzin. 2005. Light limitation creates patchy distribution of an invasive
grass in eastern deciduous forests. Biological Invasions 7(3): 477-488.


On Mon, Sep 28, 2015 at 6:27 AM, Marc Imlay <ialm at erols.com> wrote:
Any response for Tom and Jan?
Marc Imlay, PhD, Chair, Biological control working Group  Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator.
(301) 442-5657 cell  ialm at erols.com
Natural and Historical Resources Division
The  Maryland-National   Capital   Park  and Planning Commission
www.pgparks.com   
 
 
-----Original Message-----
From: tomnjan2 [mailto:tomnjan2 at comcast.net] 
Sent: Monday, September 28, 2015 12:16 AM
To: Marc Imlay <ialm at erols.com>
Subject: Stilt grass question
 
Hi Marc, 
Tom (Crone) and I were walking around the back end of Greenbelt Park today. He was checking on some multiflora rose he'd cut earlier as well stilt grass he cut. But I noticed something I hadn't before. There were large swathes of stilt grass that had bare patches within those areas. The common denominator was Holly tree leaf shed. We started searching elsewhere and found the same correlation. The stilt grass totally avoided wherever the dropped holly leaves landed. Have you seen this before, or know if there's a specific chemical in the leaf that inhibits or kills the grass? Or some other symbiotic relationship creating the inhibition? I'm really curious to know. As we were driving out of the park, I started looking at the mountain laurel and what I saw didn't seem to be surrounded by stilt grass either.
 
thanks
Jan Steiner
 
Sent from my iPad=






	
		
			
				
			
		
		
			
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-- 
Jake Hughes
Lead Biological Science Technician
Shenandoah National Park
3655 US Hwy 211 E
Luray, VA 22835
Jake_Hughes at nps.gov
Office: 540-999-3500 ext 3492 
Fax: 540-999-3697



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