[MAIPC] Incised fumewort infestations can be really bad

Wed May 3 13:15:03 PDT 2023

WV had 2020 iNat report from residential area, but it wasn't apparent at the site (or evident around the neighborhood) when I checked last year.
I didn't attempt contact with property owner or make close examination of surroundings (the local homes have mostly well managed lawn yards).
It was maybe planted/introduced in garden and hasn't spread overwhelmingly yet, though a better look might find it persisting.  I'll keep watch,

Donna Ford-Werntz, Ph.D.
Service Professor/Herbarium Curator
Biology Dept., Box 6057
Life Sci. Bldg., 53 Campus Dr.
West Virginia Univ.
Morgantown, WV 26506
304-293-0794; biology.wvu.edu
________________________________
From: MAIPC <maipc-bounces at lists.maipc.org> on behalf of Greenberg, Patricia <Patricia.Greenberg at fairfaxcounty.gov>
Sent: Friday, April 28, 2023 12:25 PM
To: Jeffrey Branham <jbranham at prescott.edu>; Ossi, Damien (DOEE) <damien.ossi at dc.gov>
Cc: maipc at lists.maipc.org <maipc at lists.maipc.org>
Subject: Re: [MAIPC] Incised fumewort infestations can be really bad

Hi,

We have a 30-acre area on the Difficult Run Stream Valley in Fairfax County of Corydalis incisa. For that area, we are just trying to contain and keep it from spreading further out from center. However, it’s been located all along the trails and all the way down to the Potomac River.

Really grateful for the Invader Detectives for the support in helping us track it down. We have a fantastic group of EDRR volunteers that have really been tremendous in helping us survey the parkland so we can learn the extent of spread.

Patricia

Patricia Pearl Greenberg
Ecologist II

Invasive Management Area Program Manager

Natural Resource Management and Protection Branch

Fairfax County Park Authority

Office: 703-324-8673

patricia.greenberg at fairfaxcounty.gov

(She/Her)

ISA Certified Arborist

Tree Risk Assessment Qualified (TRAQ)

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Jeffrey Branham
Sent: Thursday, April 27, 2023 10:47 AM
To: Ossi, Damien (DOEE) <damien.ossi at dc.gov>
Cc: maipc at lists.maipc.org
Subject: Re: [MAIPC] Incised fumewort infestations can be really bad

I'm relatively new to the area, but its all over Philadelphia, particularly in the Wissahickon Gorge.  As far as I know, its not really prevalent in NJ which is a wonder because we've got every other invasive species.  Seems like its only a matter of time..

On Thu, Apr 27, 2023 at 10:26 AM Ossi, Damien (DOEE) <damien.ossi at dc.gov<mailto:damien.ossi at dc.gov>> wrote:

Hi folks,

If you’re like me, you have not been aware of the rapid growth of incised fumewort in the past few years.  Under Sara Tangren’s leadership the Nat Cap PRISM started tracking it this spring with our network of Invader Detectives.

It’s…everywhere, and it appears to be outcompeting or outright killing bluebells wherever they occur together.  USDA’s weed risk assessment for this species found no evidence for allelopathy in field tests, but that had high uncertainty.

Please click on the iNatualist entry below and look at the images.  It appears to occupy 1+ acres in Seneca Creek State Park in Montgomery County.  This is the largest population that we have found this year, but it appears to go from a few plants to a large population in only two or three seasons.

Have you been tracking this plant in your area?

Damien

Damien Ossi

Wildlife Biologist

Fisheries and Wildlife Division

Department of Energy and Environment

202-741-0840
damien.ossi at dc.gov<mailto:damien.ossi at dc.gov>

From: invaderdetectives at googlegroups.com<mailto:invaderdetectives at googlegroups.com> <invaderdetectives at googlegroups.com<mailto:invaderdetectives at googlegroups.com>> On Behalf Of Tangren, Sara (DOEE)
Sent: Monday, April 17, 2023 11:36 AM
To: invaderdetectives at googlegroups.com<mailto:invaderdetectives at googlegroups.com>
Subject: [InvaderDetectives] incised fumewort infestations can be really bad

Hi All,

I’ve spent the last week helping combat an infestation at Hemlock Overlook Park (Bull Run watershed, VA). The appearance of what is going on there suggests that the plants are allelopathic, but only scientific tests could tell us for sure. To see the bluebells, violets, and spring beauties being overrun was heartbreaking. It took only 3 years to go from first observation to serious ecological damage and first response. We’ve got to react to this species more quickly from here on out.

Today I’m catching up on iNat reviews and came across this one by our own esummerbell. Her photos do an excellent job of capturing just how bad incised fumewort can get, please have a look.

[cid:image001.jpg at 01D979CC.86DE38A0]

Incised Fumewort (Corydalis incisa)<https://www.inaturalist.org/observations/155117633>

inaturalist.org<https://www.inaturalist.org/observations/155117633>

I think we need to have a meeting this winter and develop a region wide (or nationwide) management plan, something large scale.

Best,

Sara

Sara A. Tangren, Ph.D.
Coordinator
National Capital PRISM
Department of Energy & Environment
Government of the District of Columbia
1200 First Sreet NE, Fifth Floor
Washington, DC 20002
sara.tangren at dc.gov<mailto:sara.tangren at dc.gov>

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Cheers,
  JB
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