[MAIPC] [External] Slate Article on Japanese Knotweed

[Melissa Bravo]

? I see pollen production on knotweed at my place, the bees love it. And I've always seen seed pods - so it would not be worth it to the plant ecologically speaking to bother producing seeds if not for some season where it would be beneficial  - - seasonal triggers often do not get captured in one year, two year small site studies.. 
but I did not read the article... just two -centencing- here lol. 
Melissa A. Bravo, M.S. CCA, Agronomist Meadow Lake Farm Consulting Services 814-574-4067 / bravomelissa at yahoo.com 





 

    On Thursday, May 9, 2019, 12:50:22 PM EDT, Muth, Norris (MUTH) <MUTH at juniata.edu> wrote:  
 
 There’s some knotweed hybridization which implies at least pollen production - and quite likely seed production. But the lack of genetic variability argues for clonal spread only. It’s sort of a similar story to Phragmites australis. Christina Richards - cited in the article - would likely know for sure.
What do you say Dr. Richards? Viable seed production at all?
—Norris Z. Muth, Ph.D. (he/him/his)Juniata Collegemuthlab.org From: MAIPC <maipc-bounces at lists.maipc.org> on behalf of Rohrbaugh, Andrew <anrohrbaug at pa.gov>
Sent: Thursday, May 9, 2019 11:53 AM
To: MAIPC Listserve
Subject: Re: [MAIPC] [External] Slate Article on Japanese Knotweed 
I don’t think there’s much evidence of seed production, although I recall someone studying the genetics of knotweed- Norris, do you recall that study?

 

Knotweed is difficult to kill, but there’s some tricks to it (mowing it down first, letting it regrow, then spraying it)… and you have to keep after the patches. It’s got a really strong root system, and once it gets started in a disturbed area (due to a root fragment moving in during disturbance) subsequent disturbances make it hard to get other species established.

 

Andrew Rohrbaugh | Botanist

Pennsylvania Department of Conservation & Natural Resources
Bureau of Forestry | Ecological Services Section

PO Box 8552, 400 Market St, Harrisburg, PA 17105-8552
Phone: 717.705.2823 |Fax: 717.772.0271
anrohrbaug at pa.gov

www.dcnr.state.pa.us

 

From: MAIPC [mailto:maipc-bounces at lists.maipc.org]On Behalf Of frazmo
Sent: Thursday, May 09, 2019 11:41 AM
To: MAIPC Listserve <maipc at lists.maipc.org>
Subject: [External] [MAIPC] Slate Article on Japanese Knotweed

 

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Read this article if you want to experience real terror...

 

https://slate.com/technology/2019/05/japanese-knotweed-invasive-plants.html

 

And two questions for possible discussion:

 

1. Do MAIPC listserv readers find JK as hard to kill as described in the article?

 

2. I have seen isolated plants come up in some odd places. Does anyone know whether there is any evidence of JK spreading by seeds in our mid-Atlantic area?

 

Cheers,   Steve Young, Arlington VA volunteer

 


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