[MAIPC] [Maipc-brd] Fwd: Garlic Mustard scarce this season, in 2018?

[Mark Frey]

I have seen typically dense stands of rosettes in the DC metro area this
season so I don't think it was cold enough to kill at least around here.
And, based on my research in Ohio, focused on garlic mustard with winter
temperatures into the teens, garlic mustard overwintered just fine. Today I
led a volunteer group and we pulled 21 garbage bags full of second year
plants, so there is still plenty around! And, it is definitely not too
early for healthy rosettes. Seedlings emerge in ~February so they have had
about 10 weeks to develop.

Vicky Nuzzo and Bernd Blossey (and others) have put forward the idea that
garlic mustard has gone through a decline in density in some areas. I don't
recall if they were saying that decline is only in areas with long invasion
histories or in other areas too. I think They talked about it at a MA-IPC
event in Pennsylvania in about 2001 (at the Morris Arb?).

Mark Frey

On Fri, May 4, 2018 at 10:12 PM, frazmo <frazmo at gmail.com> wrote:

> Ms. Schreter wrote the following to the MAIPC info email:
>
> 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
>
> 1905 Dixon Rd.
> Baltimore, MD 21209
> <https://maps.google.com/?q=1905+Dixon+Rd.+Baltimore,+MD+21209&entry=gmail&source=g>
> (410) 664-5151
> #  #  #
>
> Regarding this, of course we all know that Garlic Mustard is a biennial
> and that at this time of year we should be seeing both first- and
> second-year plants. And I will not discount that the weather may have
> impacted some of the plants. However, I remember a presentation on GM
> provided by an academic colleague at a MAIPC (then MA-EPPC) conference a
> few years ago (perhaps as many as 10-14 years?). She explained something
> that surprised and impressed me and stayed with me -- that GM populations
> are likely to go through alternating 2-year cycles of peaks and troughs of
> abundance. Her explanation made a lot of sense at the time and I wish I
> could replay it... :( . I hope someone else may remember better than I and
> be able to provide a link to more info. Suffice it to say, don't let GM
> fool you. Alternating boom years and more subdued years may just be part of
> its normal behavior. Cheers,
>
> Steve Young, Arlington VA
>
> On Fri, May 4, 2018 at 5:39 PM, Jenn Truong <jenn.b.truong at gmail.com>
> wrote:
>
>> 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
>> info at maip.org | www.maipc.org
>>
>>
>> ---------- Forwarded message ----------
>>> From: Carol Schreter <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
>>>
>>>
>>> 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
>>>
>>> 1905 Dixon Rd.
>>> Baltimore, MD 21209
>>> <https://maps.google.com/?q=1905+Dixon+Rd.+Baltimore,+MD+21209&entry=gmail&source=g>
>>> (410) 664-5151
>>>
>>
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>>
>>
>
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