[MAIPC] Murdannia Info

Sun Aug 18 13:59:45 PDT 2019

Hi Alex,

See previous messages below with MAIPC on Murdannia keisak.

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

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Alexander Fisher
Sent: Sunday, August 18, 2019 2:01 PM
To: maipc at lists.maipc.org
Subject: [MAIPC] Murdannia Info

Can anyone share information on their experiences with the management of
Murdannia keisak for conservation or restoration. Also if you have
information on herbicide treatment prescriptions that is welcomed too.

I am continuing to find this plant along streams and wetlands throughout
Virginia as far as Bedford County and Albemarle to the west and VA Beach to
the east. 

Thanks,

Alex Fisher

Conservation Chair of VNPS

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of
sarahechamberlin at gmail.com
Sent: Tuesday, August 28, 2018 10:35 AM
To: maipc at lists.maipc.org
Subject: [MAIPC] Beware Marsh Dewflower!

Please, please be on the lookout for Marsh Dewflower (aka Dayflower),
Murdannia keisak. If you aren’t aware of this moisture loving plant, I
cannot emphasize enough the need for you to learn to recognize it so that
you can pull it immediately. 

In the space of only two years it has overwhelmed the wetlands/stream on my
Charles City County, Virginia property. Mats of Marsh Dewflower have
smothered native habitat. Because the seeds come from upstream; the invasion
cannot be controlled.

According to EDD Maps it is spreading throughout the mid-Atlantic.
<https://www.invasiveplantatlas.org/subject.html?sub=3053>
https://www.invasiveplantatlas.org/subject.html?sub=3053

Removing non-native invasive plants is my passion. Japanese Honeysuckle and
Japanese Stilt grass, once prevalent on my property, have been removed by
hand. All that I need to do now is to monitor for new invasions. But with
Murdannia keisak, a plant I was not familiar with, I have met my match. I
can only remove it from select areas in and along the marsh,  knowing that
the annual will return to the same areas next year.  It is a heartbreaker. 

Please, please beware this plant! 

Sally Chamberlin

Certified Virginia Master Naturalist 

From: Marc Imlay <ialm at erols.com> 
Sent: Sunday, October 30, 2016 8:31 AM
To: 'Sue Muller' <sonicsue at verizon.net>; 'Muller, Sue'
<smuller at howardcountymd.gov>
Cc: Ellis, Michael <Michael.Ellis at pgparks.com>
Subject: yesterday

Hi Sue,

As discussed yesterday, A management guide for Invasive Plants in Southern
Forests, page 66, states “Japanese Knotweed spreads along streams by stem
and rhizome fragments, and rare seeds”

Regarding Murdannia keisak wartremoving herb
<http://plants.usda.gov/core/profile?symbol=MUKE>
http://plants.usda.gov/core/profile?symbol=MUKE shows it introduced in
Maryland. Wart-Removing Herb Murdannia keisak (Hassk.) Hand.-Maz. O
Originally associated with rice production in east Asia and likely was
imported with rice to be used as seed in Louisiana and South Carolina.
Earliest records of existence are from the 1920’s. O Found in all coastal
states from Delaware to Louisiana. O Dispersal is by seed and from
vegetative structures. Waterfowl favor seed as a food source and are a
suspected vector. O Has an aggressive ability to establish and take over
wetlands and marshes at the exclusion of native plants.

<https://www.clemson.edu/extension/natural_resources/forestry/veg_mgmt/invas
ive_species_booklet.pdf>
https://www.clemson.edu/extension/natural_resources/forestry/veg_mgmt/invasi
ve_species_booklet.pdf

Plant Invaders of Mid-Atlantic Natural Areas

Swearingen, J., K. Reshetiloff, B. Slattery, and S. Zwicker. 2002. Plant
Invaders of
M  <http://www.invasive.org/eastern/midatlantic/muke.htmlid-Atlantic>
http://www.invasive.org/eastern/midatlantic/muke.htmlid-Atlantic Natural
Areas. National Park Service and U.S. Fish & Wildlife Service, 82 pp.

Brent Steury, NPS

Marsh Dewflower
Murdannia keisak

Marsh dewflower, a member of the spiderwort family and native of eastern
Asia, was first noted in 1935 in cultivated rice paddies in South Carolina.
It escaped and has become established in the wild in 18 southern states and
the District of Columbia. Marsh dewflower prefers damp soil at the edge of
freshwater tidal marshes, around ponds and along slow moving streams. Its
aggressive growth enables it to out-compete native plants by forming dense
mats. Seeds are dispersed by wildlife. It also spreads when floods
distribute root fragments to new locations.

Prevention and Control
Hand pulling may be effective if done before the plant sets seed. Glyphosate
treatments were ineffective when applied early in the season.

Native Alternatives
water plantain (Alisma subcordatum), three-way sedge (Dulichium
arundinaceum), duck-potato or arrowhead (Sagittaria latifolia or rigida)

 <http://www.invasive.org/eastern/midatlantic/muke.html>
http://www.invasive.org/eastern/midatlantic/muke.html

Marc

 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

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Williams, Owen
Thomas Alexande
Sent: Wednesday, June 01, 2016 2:27 PM
To: maipc at lists.maipc.org
Subject: [MAIPC] seeking experienced advice to treat Murdannia keisak

Hello all,

I am seeking the advice of people with experience treating Murdannia keisak.
I have a ½ acre seasonally flooded pond with a bad infestation.  I can
control holding up to 20’’ of water in the deepest parts of the pond,
subject to rates of precipitation/evapotranspiration.   

Has anyone had success with a particular chemical, treatment timing,
combination with flooding
etc.  I have avoided mechanical treatments and I
have had little to no progress with rodeo applied in the August timeframe.

Thanks very much,

Owen

Owen Williams

Ecologist

Resource Management Division

Fairfax County Park Authority

12055 Government Center Parkway, Suite 936

Fairfax, VA 22035-1118

Office ph. (703) 324-1036  Fax (703) 324-3996

 <mailto:owilli at fairfaxcounty.gov> owilli at fairfaxcounty.gov

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20190818/0ec577c2/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 3687 bytes
Desc: not available
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20190818/0ec577c2/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 10295 bytes
Desc: not available
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20190818/0ec577c2/attachment-0003.jpg>