[MAIPC] What's Munching on our Wavyleaf?

Fri Oct 30 04:02:19 PDT 2015

Hi everyone,

Following are the reports on the insects consuming Wavyleaf Basketgrass in Beltsville, Maryland in September. No pathogens were reported.

Marc Imlay, PhD, Chair, Biological control working Group
Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator.
(301) 442-5657<blocked::blocked::tel:(301)%20442-5657> cell  ialm at erols.com<blocked::blocked::mailto:ialm at erols.com>
Natural and Historical Resources Division
The  Maryland-National   Capital   Park  and Planning Commission
www.pgparks.com<http://www.pgparks.com/>

From: Steiner, Warren [mailto:STEINERW at si.edu]
Sent: Wednesday, September 09, 2015 10:52 AM
To: 'Swearingen, Jil' <jil_swearingen at nps.gov>; dadamski at si.gov; Davis, Don <DAVISD at si.edu>; Adamski, David <AdamskiD at si.edu>
Cc: Ellis, Michael <Michael.Ellis at pgparks.com>; Imlay, Marc <Marc.Imlay at pgparks.com>
Subject: RE: [MAIPC] What's Munching on our Wavyleaf?

Here are pics of specimens preserved on 6 Sept. from Oplismenus.  An Elachista, I think, but not my area. Also one parasitoid pupa.  We put several leaves with larvae in alcohol and have the rest for rearing attempt…however this morning have not seen any more larvae in mines of either Op. or Panicum.  Samples were collected about a week ago now and larvae may have bailed out…none seen in containers, which have loose closure.  Delivering to Lep folks now…

Will need locality data for these---Thanks.

Warren

From: Swearingen, Jil [mailto:jil_swearingen at nps.gov]
Sent: Wednesday, September 02, 2015 1:35 PM
To: dadamski at si.gov<mailto:dadamski at si.gov>; Steiner, Warren; Davis, Don; Adamski, David
Cc: Ellis, Michael
Subject: Fwd: [MAIPC] What's Munching on our Wavyleaf?

Hi there,

Any thoughts?

Jil
_____________________________
From: Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>>
Sent: Friday, October 2, 2015 9:21 PM
Subject: RE: What's Munching on our Wavyleaf?
To: Ellis, Michael <michael.ellis at pgparks.com<mailto:michael.ellis at pgparks.com>>, 'Sara Ann Tangren' <stangren at umd.edu<mailto:stangren at umd.edu>>

Looks good to me. Marc

From: Sara Ann Tangren [mailto:stangren at umd.edu]
Sent: Friday, October 02, 2015 6:36 PM
To: Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>>; Michael Ellis <Michael.Ellis at pgparks.com<mailto:Michael.Ellis at pgparks.com>>
Subject: Fwd: What's Munching on our Wavyleaf?

Hi Guys,

I�m writing up the label for your herbarium voucher specimens. Would I be correct as follows:

Collected: 9/1/15, Beltsville Neighborhood Park, Prince George�s County MD
Collectors: Michael Ellis, Marc Imlay
Habitat: Moist forest.
Notes: Wavyleaf basketgrass leaf miner damage widespread at Beltsville Neighborhood Park this year.

If you decide to publish your results, you will have an herbarium voucher specimen to reference.

Sara

Begin forwarded message:

From: Marc Imlay <ialm at erols.com<mailto:ialm at erols.com>>
Subject: What's Munching on our Wavyleaf?
Date: September 2, 2015 at 12:32:14 AM EDT
To: "Sierra Club Maryland Chapter, Alien Invasive" <MD-CONS-INVASIVES at LISTS.SIERRACLUB.ORG<mailto:MD-CONS-INVASIVES at LISTS.SIERRACLUB.ORG>>, "Wu, Carrie" <cwu at richmond.edu<mailto:cwu at richmond.edu>>, <donnamfoster at fs.fed.us<mailto:donnamfoster at fs.fed.us>>
Cc: "'Beauchamp, Vanessa B.'" <VBeauchamp at towson.edu<mailto:VBeauchamp at towson.edu>>, <ipetrus1 at verizon.net<mailto:ipetrus1 at verizon.net>>, <rwestbrooks at intrstar.net<mailto:rwestbrooks at intrstar.net>>, <kjamir at comcast.net<mailto:kjamir at comcast.net>>, <jvan7423 at yahoo.com<mailto:jvan7423 at yahoo.com>>, <wesley.Knapp at Maryland.gov<mailto:wesley.Knapp at Maryland.gov>>, <JFrancismd at verizon.net<mailto:JFrancismd at verizon.net>>, "'Palmer, James G.'" <James.G.Palmer at jhuapl.edu<mailto:James.G.Palmer at jhuapl.edu>>, "'Garrett,Chris'" <Chris.Garrett at pgparks.com<mailto:Chris.Garrett at pgparks.com>>, "'Lowe, Kyle'" <Kyle.Lowe at pgparks.com<mailto:Kyle.Lowe at pgparks.com>>, <Rod.Simmons at alexandriava.gov<mailto:Rod.Simmons at alexandriava.gov>>, <Jil_Swearingen at nps.gov<mailto:Jil_Swearingen at nps.gov>>, "'Hough-Goldstein, J A'" <jhough at udel.edu<mailto:jhough at udel.edu>>, "'Bruckart, William'" <William.Bruckart at ARS.USDA.GOV<mailto:William.Bruckart at ARS.USDA.GOV>>, "'Andrew H. Baldwin'" <baldwin at umd.edu<mailto:baldwin at umd.edu>>, 'Stephanie A Yarwood' <syarwood at umd.edu<mailto:syarwood at umd.edu>>, "'Kerrie L. Kyde -DNR-'" <kerrie.kyde at maryland.gov<mailto:kerrie.kyde at maryland.gov>>, <donnamfoster at fs.fed.us<mailto:donnamfoster at fs.fed.us>>, "'MNPS Board'" <board at mdflora.org<mailto:board at mdflora.org>>, 'Sara Tangren' <stangren at umd.edu<mailto:stangren at umd.edu>>, "'Charlie Davis'" <charliedavis1 at verizon.net<mailto:charliedavis1 at verizon.net>>, <kim.finch at ppd.mccppc.org<mailto:kim.finch at ppd.mccppc.org>>, "'Juba, Marc'" <Marc.Juba at ppd.mncppc.org<mailto:Marc.Juba at ppd.mncppc.org>>, <INVASIVES at LISTSERV.UMD.EDU<mailto:INVASIVES at LISTSERV.UMD.EDU>>, <NativePlantseast at yahoogroups.com<mailto:NativePlantseast at yahoogroups.com>>, <vnps-pot at yahoogroups.com<mailto:vnps-pot at yahoogroups.com>>

Over an acre of WLBG at Beltsville Neighborhood Park I saw every specimen in each patch infected this way as described by Ranger Mike Ellis in the message immediately below this one.

 Marc Imlay, PhD

Conservation biologist, MNCPPC, 3014425657<tel:3014425657>

Board member of the Mid-Atlantic Invasive Plant Council,

Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland Chapter of the Sierra Club.

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Ellis, Michael
Sent: Tuesday, September 01, 2015 11:39 PM
To: Imlay, Marc <Marc.Imlay at pgparks.com<mailto:Marc.Imlay at pgparks.com>>
Cc: Nate Kurtanich <natekurtanich at gmail.com<mailto:natekurtanich at gmail.com>>; NativePlantseast at yahoogroups.com<mailto:NativePlantseast at yahoogroups.com>; Beauchamp, Vanessa B. <VBeauchamp at towson.edu<mailto:VBeauchamp at towson.edu>>; Bruckart, William <William.Bruckart at ARS.USDA.GOV<mailto:William.Bruckart at ARS.USDA.GOV>>; maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>; Ann Bonner <Ann.Bonner at dnr.state.oh.us<mailto:Ann.Bonner at dnr.state.oh.us>>; Sara Tangren <stangren at umd.edu<mailto:stangren at umd.edu>>; Wu, Carrie <cwu at richmond.edu<mailto:cwu at richmond.edu>>; Aimee Weldon <weldon at potomac.org<mailto:weldon at potomac.org>>
Subject: [MAIPC] What's Munching on our Wavyleaf?

Hi Everyone,

Has anyone seen wavyleaf basketgrass getting attacked like this before?  Beltsville photo album: https://goo.gl/photos/2FiwZpebPcdWFrHw6  - Notice how similar the damage is to what we are finding on our deer-tongue grasses (Last four photos).

At Little Paint Branch Park & Beltsville Neighborhood Park I estimate we are seeing this damage in at least 50% of all our wavyleaf patches.  We have seen this damage for roughly 3 years but in previous years it was very isolated to just handful of plants, now it has spread across most of the park, affecting thousands of WLBG plants.  Last year I came up with a theory that this damage is possibly caused by the same leaf-miner that seems so fond of our Deer-Tongue.

Although we haven�t seen any plants killed by this apparent leaf-miner, the plants do seem much more susceptible to stress once damaged, such as the dry conditions we�ve seen in Beltsville this year, possibly reducing or at least delaying seed production.

Perhaps a leaf-miner fly or leaf-miner moth already associated with Dichanthelium clandestinum?http://www.illinoiswildflowers.info/grasses/tables/table130.html

Let us know your thoughts, if you have any advice for getting this insect identified, or if you�ve seen anything else attacking WLBG.

Also, is anyone collecting WLBG seeds this year for any studies? I can assure you we have plenty.

Thanks,

Michael Ellis

Non-Native Invasive Plant Specialist

Natural and Historical Resources Division, Park Ranger Office

The Maryland-National Capital Park and Planning Commission

www.pgparks.com<http://www.pgparks.com/>

240-429-5042<tel:240-429-5042>

From: Ellis, Michael [mailto:Michael.Ellis at pgparks.com]
Sent: Tuesday, October 06, 2015 3:07 PM
To: 'Sara Ann Tangren' <stangren at umd.edu>; Marc Imlay <ialm at erols.com>; Swearingen, Jil <Jil_Swearingen at NPS.GOV>; Steiner, Warren <steinerw at si.edu>
Subject: RE: What's Munching on our Wavyleaf?

For what it's worth, I have been finding larvae in all the Beltsville deer tongue grasses. I still believe they are the likely culprit.

[cid:image001.jpg at 01D112E0.C55D37D0]
[cid:image002.jpg at 01D112E0.C55D37D0]
[cid:image003.jpg at 01D112E0.C55D37D0]
Michael Ellis
Non-Native Invasive Plant Specialist
Natural and Historical Resources Division, Park Ranger Office
The Maryland-National Capital Park and Planning Commission
www.pgparks.com<http://www.pgparks.com>

240-429-5042<tel:240-429-5042>

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