<div dir="ltr">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.<div><br></div><div>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?).</div><div><br></div><div>Mark Frey</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, May 4, 2018 at 10:12 PM, frazmo <span dir="ltr"><<a href="mailto:frazmo@gmail.com" target="_blank">frazmo@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Ms. Schreter wrote the following to the MAIPC info email:<br><br>
<span class="m_-8624209608306121504gmail-im"><div><p>To MAIPC,, <b>Have you noticed that Garlic Mustard seems scarce this season? Everywhere?</b></p><p><br></p><p>Consider the possibility that Garlic Mustard is <u>scarce in 2018, all over</u>. In areas previously cleared or not. I’m thinking the frigid winter destroyed most of the 1<sup style="line-height:0">st</sup>year
or overwintering Garlic Mustard leaves, except on plants located in
very protected spots. Here in Baltimore City on May 3, 2018, some few
scattered 2<sup style="line-height:0">nd</sup>year plants are in flower.
I am pulling the occasional plant that stands <15” tall. Oddly, I
also see some nearby patches looking like 1<sup style="line-height:0">st</sup>year rosettes, like a ground cover. Too soon for that. Maybe they are the 2<sup style="line-height:0">nd</sup>year plants/roots, sending new stalks up from scratch.<br></p><p><br></p><p>I invite your reaction to this novel observation -- and interpretation. Thank you for any wisdom. </p><p><br></p><p>Carol Schreter, Baltimore Bird Club Conservation Chair</p><p><a href="https://maps.google.com/?q=1905+Dixon+Rd.+Baltimore,+MD+21209&entry=gmail&source=g" target="_blank">1905 Dixon Rd.<br>Baltimore, MD 21209</a><br>(410) 664-5151</p></div></span>
# # #<br><br></div>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,<br><br></div>Steve Young, Arlington VA<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, May 4, 2018 at 5:39 PM, Jenn Truong <span dir="ltr"><<a href="mailto:jenn.b.truong@gmail.com" target="_blank">jenn.b.truong@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi Carol,<br><br></div>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. <br><br></div>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. =)<span class="m_-8624209608306121504HOEnZb"><font color="#888888"><br></font></span><div><div><div><div class="gmail_extra"><span class="m_-8624209608306121504HOEnZb"><font color="#888888"><br clear="all"></font></span><div><div class="m_-8624209608306121504m_-3643960224383876400m_116694223065999328gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><span class="m_-8624209608306121504HOEnZb"><font color="#888888"><span style="background-color:rgba(255,255,255,0)"><b>Jenn Truong</b> </span><br>Technology Officer</font></span><span><br><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div><div><div><span></span></div><span></span><span>MAIPC Board of Directors</span><br><span></span></div></div><span>Mid-Atlantic Invasive Plant Council<br></span></div><span><a href="mailto:info@maip.org" target="_blank">info@maip.org</a> | <a href="http://www.maipc.org" target="_blank">www.maipc.org</a></span></div></div></div></div></div></span></div></div></div></div></div></div></div></div></div></div><span>
<br><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Carol Schreter</b> <span dir="ltr"><<a href="mailto:c.schreter@comcast.net" target="_blank">c.schreter@comcast.net</a>></span><br>Date: Thu, May 3, 2018 at 12:52 PM<br>Subject: Garlic Mustard scarce this season, in 2018?<br>To: <a href="mailto:info@maipc.org" target="_blank">info@maipc.org</a><br><br><br><u></u>
<div><p>To MAIPC,, <b>Have you noticed that Garlic Mustard seems scarce this season? Everywhere?</b></p><p><br></p><p>Consider the possibility that Garlic Mustard is <u>scarce in 2018, all over</u>. In areas previously cleared or not. I’m thinking the frigid winter destroyed most of the 1<sup style="line-height:0">st</sup>year or overwintering Garlic Mustard leaves, except on plants located in very protected spots. Here in Baltimore City on May 3, 2018, some few scattered 2<sup style="line-height:0">nd</sup>year plants are in flower. I am pulling the occasional plant that stands <15” tall. Oddly, I also see some nearby patches looking like 1<sup style="line-height:0">st</sup>year rosettes, like a ground cover. Too soon for that. Maybe they are the 2<sup style="line-height:0">nd</sup>year plants/roots, sending new stalks up from scratch.<br></p><p><br></p><p>I invite your reaction to this novel observation -- and interpretation. Thank you for any wisdom. </p><p><br></p><p>Carol Schreter, Baltimore Bird Club Conservation Chair</p><p><a href="https://maps.google.com/?q=1905+Dixon+Rd.+Baltimore,+MD+21209&entry=gmail&source=g" target="_blank">1905 Dixon Rd.<br>Baltimore, MD 21209</a><br>(410) 664-5151</p></div>
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