[MAIPC] Garlic Mustard scarce this season, in 2018?

Fri Jun 15 03:24:31 PDT 2018

Today with volunteers we have finished bagging all the adult garlic mustard over the usual 500 acres of urban and suburban parks in Maryland that I lead the charge on. A few were removed too late. There were many, many, more adults than last year. One reason was that in many cases there were no juveniles around because the seed bank performed go for broke. Another reason was that in a few areas, I had not sprayed mono-cultural patches of juveniles in time in 2017. I will do that sooner this year.
Marc Imlay, PhD, Chair, MAIPC Biological control working Group
Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator.
(301) 442-5657 cell  ialm at erols.com<mailto:ialm at erols.com>
Natural and Historical Resources Division
The  Maryland-National   Capital   Park  and Planning Commission
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From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Mark Frey
Sent: Monday, May 07, 2018 7:57 PM
To: Foster, Donna M -FS <donnamfoster at fs.fed.us<mailto:donnamfoster at fs.fed.us>>
Cc: maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>
Subject: Re: [MAIPC] [Maipc-brd] Garlic Mustard scarce this season, in 2018?

Thanks for sharing!

I would note that the areas described in this paper are glaciated portions of the continent and are therefore devoid of native earthworms. In our area we have a mix of native and non-native earthworms so the picture may be more complicated. I still plan to pull in in priority areas.

Mark

On Mon, May 7, 2018 at 10:59 AM, Foster, Donna M -FS <donnamfoster at fs.fed.us<mailto:donnamfoster at fs.fed.us>> wrote:
In regards to Garlic Mustard, attached is a garlic mustard update by Bernd Blossey, Cornell University.

I’m not sure I agree with his management recommendation not to remove it (I believe if you have volunteers and can pull it, PULL IT!).

The correlation between invasive earthworms is quite interesting. Here in our FS Office we have forest health staff exploring the relationship of exotic earthworms to many different impacts on forest health and regeneration and findings seem to substantiate this also.

At my home here in Morgantown, WV, the populations is as strong as ever. Also, I spent 2 weeks in NE PA the last two weeks in April and saw the population expanding again this year. Interestingly, both woodlands have very large deer populations…

I hope this helps.
Donna

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Caring for the land and serving people

From: Maipc-brd [mailto:maipc-brd-bounces at lists.maipc.org<mailto:maipc-brd-bounces at lists.maipc.org>] On Behalf Of Jenn Truong
Sent: Friday, May 4, 2018 5:40 PM
To: c.schreter at comcast.net<mailto:c.schreter at comcast.net>
Cc: MAIPC Board <maipc-brd at lists.maipc.org<mailto:maipc-brd at lists.maipc.org>>
Subject: Re: [Maipc-brd] Fwd: Garlic Mustard scarce this season, in 2018?

Hi Carol,
One of our board members noted that he has not seen much of a difference and he's out in the field quite a bit around DC and MD.
On the other hand, I don't get out in the field much at all any more (sadly). But what little I have seen from hiking around on weekends on my own does seem (anecdotally) to be less. But I'm not sure I can venture as far as to say I think it may be the frigid winter we've had. We've had worse winters when it didn't seem to have much of any effect on the Garlic Mustard. In my case, I'd like to think the areas I've visited are getting lots of great staff and volunteer control efforts that are staring to bear some success, since I tend to visit a lot of the same areas year after year and see diminished return with each year. =)

Jenn Truong
Technology Officer

MAIPC Board of Directors
Mid-Atlantic Invasive Plant Council
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---------- Forwarded message ----------
From: Carol Schreter <c.schreter at comcast.net<mailto:c.schreter at comcast.net>>
Date: Thu, May 3, 2018 at 12:52 PM
Subject: Garlic Mustard scarce this season, in 2018?
To: info at maipc.org<mailto:info at maipc.org>

To MAIPC,, Have you noticed that Garlic Mustard seems scarce this season? Everywhere?

Consider the possibility that Garlic Mustard is scarce in 2018, all over. In areas previously cleared or not. I’m thinking the frigid winter destroyed most of the 1styear or overwintering Garlic Mustard leaves, except on plants located in very protected spots. Here in Baltimore City on May 3, 2018, some few scattered 2ndyear plants are in flower. I am pulling the occasional plant that stands <15” tall. Oddly, I also see some nearby patches looking like 1styear rosettes, like a ground cover. Too soon for that. Maybe they are the 2ndyear plants/roots, sending new stalks up from scratch.

I invite your reaction to this novel observation -- and interpretation. Thank you for any wisdom.

Carol Schreter, Baltimore Bird Club Conservation Chair

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