[MAIPC] spotted knapweed in the east

Thu Jul 2 12:05:56 PDT 2015

The PA Bureau of Forestry has found that spotted knapweed is invasive in our state. Luckily, it doesn’t compete as well in forested or mesic sites.  However, on more xeric sites (rocky roadsides, ROW’s, barrens, cliffs) it can certainly be more aggressive and take space and resources away from native plants that might use those habitats. Additionally, we’ve monitored it increasing on many of the Marcellus pads and ROW’s, and it has been a management concern on some areas we are maintaining as grassland for rare bird species.

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<http://www.dcnr.state.pa.us/>

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Stephen Hiltner
Sent: Wednesday, July 01, 2015 12:59 PM
To: Bailey, Whitney - FS
Cc: maipc at lists.maipc.org
Subject: Re: [MAIPC] spotted knapweed in the east

It was invasive in prairie restorations in Ann Arbor, MI. The U of M landscape architect dept. could be contacted, or the city's Natural Areas Preservation director in the parks dept., for more up to date info.

I found something called Tyrol's knapweed (Centaurea nigrescens) spreading in a small area along the towpath in Princeton, NJ. And am seeing Daucus carota in some spots in NJ start to act as invasive in meadows as it was in Michigan.

On Wed, Jul 1, 2015 at 12:29 PM, Bailey, Whitney - FS <whitneybailey at fs.fed.us<mailto:whitneybailey at fs.fed.us>> wrote:
It's all over WV on roadsides, dry slopes, and pastures.  We are actively treating it within the boundaries of the Potomac Highlands CWPMA, but as far as I know only with herbicides thus far.

Whitney Bailey
Forest Ecologist
Forest Service
Monongahela National Forest
p: 304-636-1800 x280<tel:304-636-1800%20x280>
whitneybailey at fs.fed.us<mailto:whitneybailey at fs.fed.us>
200 Sycamore St.
Elkins, WV 26241
www.fs.fed.us<http://www.fs.fed.us>

Caring for the land and serving people

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Today's Topics:

   1. spotted knapweed in the east (Hough-Goldstein, J A)
   2. Re: spotted knapweed in the east (Swearingen, Jil)
   3. Re: spotted knapweed in the east (McAvoy, Tom)

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Message: 1
Date: Wed, 1 Jul 2015 14:29:16 +0000
From: "Hough-Goldstein, J A" <jhough at udel.edu<mailto:jhough at udel.edu>>
To: MA-IPC Listserve <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>
Subject: [MAIPC] spotted knapweed in the east
Message-ID: <5A6E273BE0233E479143BB98CBFF0F6971AA1088 at mailbox1>
Content-Type: text/plain; charset="utf-8"

All,
I am working on adding spotted knapweed to the list of invasive plants in the Mid-Atlantic that have biocontrol insects available for release, but the vast majority of published work deals with infestations in western rangelands. The implication seems to be that it rarely becomes invasive in the east, but maybe that is changing.
Does anyone know of (1) infestations of knapweed in particular habitats in the east or (2) any states in the eastern US that have released biocontrol insects targeting this species?
Thanks,
Judy
____________________________
Judy Hough-Goldstein, Professor
Dept. Entomology & Wildlife Ecology
University of Delaware, Newark DE 19716
Phone: (302) 831-2529<tel:%28302%29%20831-2529>
E-mail: jhough at udel.edu<mailto:jhough at udel.edu><mailto:jhough at udel.edu<mailto:jhough at udel.edu>>
http://canr.udel.edu/faculty/hough-goldstein-judy/

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Message: 2
Date: Wed, 1 Jul 2015 11:01:21 -0400
From: "Swearingen, Jil" <jil_swearingen at nps.gov<mailto:jil_swearingen at nps.gov>>
To: "Hough-Goldstein, J A" <jhough at udel.edu<mailto:jhough at udel.edu>>
Cc: MA-IPC Listserve <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>
Subject: Re: [MAIPC] spotted knapweed in the east
Message-ID:
        <CAF689tm=xnJNq5zKKrfBrZfF3GZAMJ3M6Q2tC3n9E_Azof=gyg at mail.gmail.com<mailto:gyg at mail.gmail.com>>
Content-Type: text/plain; charset="utf-8"

Judy,

I'm glad we are giving this plant more attention. It is definitely an invasive in natural areas in the eastern states. See the EDDMapS based map of its distribution nationwide from the Invasive Plant Atlas of the United States.  I saw large infestations of it along I-70 and I-68 this past weekend in Allegany and Washington Cos. in Maryland.

http://www.invasiveplantatlas.org/subject.html?sub=3013

Thank you,

Jil

On Wed, Jul 1, 2015 at 10:29 AM, Hough-Goldstein, J A <jhough at udel.edu<mailto:jhough at udel.edu>>
wrote:

>  All,
>
> I am working on adding spotted knapweed to the list of invasive plants
> in the Mid-Atlantic that have biocontrol insects available for
> release, but the vast majority of published work deals with
> infestations in western rangelands. The implication seems to be that
> it rarely becomes invasive in the east, but maybe that is changing.
>
> Does anyone know of (1) infestations of knapweed in particular
> habitats in the east or (2) any states in the eastern US that have
> released biocontrol insects targeting this species?
>
> Thanks,
>
> Judy
>
> ____________________________
>
> Judy Hough-Goldstein, Professor
>
> Dept. Entomology & Wildlife Ecology
>
> University of Delaware, Newark DE 19716
>
> Phone: (302) 831-2529<tel:%28302%29%20831-2529>
>
> E-mail: jhough at udel.edu<mailto:jhough at udel.edu>
>
> http://canr.udel.edu/faculty/hough-goldstein-judy/
>
>
>
>
>
>
>
> _______________________________________________
> MAIPC mailing list
> MAIPC at lists.maipc.org<mailto:MAIPC at lists.maipc.org>
> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org
>
>

--
*?Jil Marie Swearingen*

*IPM and Invasive Species CoordinatorIntegrated Pest Management Program* *National Capital Region* *Natural Resources and Science*
*4598 MacArthur Blvd., N.W.*
*Washington, DC 20007*
*?202-339-8318<tel:202-339-8318>*

I
?PM Resources: ?
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Message: 3
Date: Wed, 1 Jul 2015 15:41:16 +0000
From: "McAvoy, Tom" <tmcavoy at vt.edu<mailto:tmcavoy at vt.edu>>
To: "Hough-Goldstein, J A" <jhough at udel.edu<mailto:jhough at udel.edu>>, MA-IPC Listserve
        <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>
Subject: Re: [MAIPC] spotted knapweed in the east
Message-ID: <7e45b8bbd63f497683872328a3625088 at BELL.cc.w2k.vt.edu<mailto:7e45b8bbd63f497683872328a3625088 at BELL.cc.w2k.vt.edu>>
Content-Type: text/plain; charset="utf-8"

Judy,
Attached is a pub on knapweed we did back in the 1980 - 90?s.
We haven?t worked on it since then. Still a lot of knapweed here.
Tom

---------------------------------------------------------------------------------------------------------------------------
Tom McAvoy
Entomology (MC0319)
Price Hall, Rm 216, Virginia Tech
Blacksburg, VA  24061
Main Office: (540) 231-4010<tel:%28540%29%20231-4010>
Q-lab: 540-231-6320<tel:540-231-6320>
FAX: 540-231-9131<tel:540-231-9131>

From: MAIPC [mailto:maipc-bounces at lists.maipc.org<mailto:maipc-bounces at lists.maipc.org>] On Behalf Of Hough-Goldstein, J A
Sent: Wednesday, July 01, 2015 10:29 AM
To: MA-IPC Listserve
Subject: [MAIPC] spotted knapweed in the east

All,
I am working on adding spotted knapweed to the list of invasive plants in the Mid-Atlantic that have biocontrol insects available for release, but the vast majority of published work deals with infestations in western rangelands. The implication seems to be that it rarely becomes invasive in the east, but maybe that is changing.
Does anyone know of (1) infestations of knapweed in particular habitats in the east or (2) any states in the eastern US that have released biocontrol insects targeting this species?
Thanks,
Judy
____________________________
Judy Hough-Goldstein, Professor
Dept. Entomology & Wildlife Ecology
University of Delaware, Newark DE 19716
Phone: (302) 831-2529
E-mail: jhough at udel.edu<mailto:jhough at udel.edu><mailto:jhough at udel.edu<mailto:jhough at udel.edu>>
http://canr.udel.edu/faculty/hough-goldstein-judy/

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