[MAIPC] MAIPC Digest, Vol 65, Issue 3 -Message 2

Mon Mar 13 06:40:17 PDT 2017

For the last 2 decades I have removed all the specimens in a population
either by mechanical or chemical treatment.

Marc Imlay, PhD, Conservation biologist, Chair, MAIPC (Mid Atlantic Invasive
Plant Council)  Biological control working Group

Board Member, Maryland Native Plant Society,

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

Park Ranger Office, Non-native Invasive Plant Control coordinator.
<mailto:Marc.Imlay at pgparks.com> Marc.Imlay at pgparks.com

(301) 442-5657 <tel:(301)%20442-5657>  cell  Natural and Historical
Resources Division

The  Maryland-National   Capital   Park  and Planning Commission

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Kathryn
Peterson-Lambert
Sent: Thursday, March 09, 2017 2:12 PM
To: maipc at lists.maipc.org
Subject: Re: [MAIPC] MAIPC Digest, Vol 65, Issue 3 -Message 2

On Mar 7, 2017, at 8:47 AM, Kathryn Peterson-Lambert <triplam747 at aol.com
<mailto:triplam747 at aol.com> > wrote:

Hello and great point regarding chemical resistance - this is a biological
process that is present everywhere - in my IPM classes that I had with Mark
and also in Pennsylvania - it was suggested that rotating the use of
chemicals would alleviate some of this resistance - it is similar to the
antibiotic resistance that humans develop to bacteria - using the products
correctly and not abusing them also helps - much like the IPM - Mark
suggested using a lower dosage on the conservative side to treat problems -
rather than too much. This combined with a rotation of chemicals and without
a sole reliance on the chemicals. Mechanical, biological, other methods are
available - once a chemical has not been used for three years or so - then
the plants after so many generations respond to the chemical again. 

On Mar 6, 2017, at 4:43 PM, maipc-request at lists.maipc.org
<mailto:maipc-request at lists.maipc.org>  wrote:

Send MAIPC mailing list submissions to
            maipc at lists.maipc.org <mailto:maipc at lists.maipc.org> 

To subscribe or unsubscribe via the World Wide Web, visit
            http://lists.maipc.org/listinfo.cgi/maipc-maipc.org
or, via email, send a message with subject or body 'help' to
            maipc-request at lists.maipc.org
<mailto:maipc-request at lists.maipc.org> 

You can reach the person managing the list at
            maipc-owner at lists.maipc.org <mailto:maipc-owner at lists.maipc.org>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of MAIPC digest..."

Today's Topics:

  1. 2 upcoming meetings + Faith's blog about inv spp intro rates
     (Phytodoer at aol.com <mailto:Phytodoer at aol.com> )
  2. Invasive Management as a Selection Pressure (frazmo)

----------------------------------------------------------------------

Message: 1
Date: Mon, 6 Mar 2017 11:03:43 -0500
From: Phytodoer at aol.com <mailto:Phytodoer at aol.com> 
To: necis at lists.nationalwildlife.org
<mailto:necis at lists.nationalwildlife.org> , ficmnew at ls.ars.usda.gov
<mailto:ficmnew at ls.ars.usda.gov> ,
            maipc at lists.maipc.org <mailto:maipc at lists.maipc.org> 
Subject: [MAIPC] 2 upcoming meetings + Faith's blog about inv spp
            intro rates
Message-ID: <1983feb.235d5b14.45eee25e at aol.com
<mailto:1983feb.235d5b14.45eee25e at aol.com> >
Content-Type: text/plain; charset="utf-8"

Hello,
forest pest mavens & others

I have posted a blog at _www.cisp.us_ (http://www.cisp.us)  or 
_www.nivemnic.us_ (http://www.nivemnic.us)  that reports on the Hanno
Seebens & 40+ 
colleagues - showing that introductions of invasive species  continued to
rise 
in the 20th Century & first years of the 21st ... policies  are not yet 
adequately effective in turning back this tidal wave ...

2 meetings in May provide opportunity to join others working on these  
problems.  

1) The North American Invasive Species Forum - which meets every other year 
- is meeting in Savannah, GA on May 9 - 11.  I hope this meeting will help 
bridge the gap between "invasive species" activists and official 
"phytosanitary"  types.  The agenda and registration information is at 
http://www.invasivespecies2017.org/

2) IUFRO section on Foliage, shoot and stem diseases of forest trees will  
be in Niagara Falls, Ontario on May 7-11, 2017. This year?s meeting  theme: 
Invasive Forest Pathogens & Implications for Biology and  Policy. Details 
are at https://www.cif-ifc.org/iufroworkingparty2017/

Wish I could go to both!

Faith Campbell
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/f3071
5ea/attachment.html>

------------------------------

Message: 2
Date: Mon, 6 Mar 2017 15:09:38 -0500
From: frazmo <frazmo at gmail.com <mailto:frazmo at gmail.com> >
To: "maipc at lists.maipc.org <mailto:maipc at lists.maipc.org> "
<maipc at lists.maipc.org <mailto:maipc at lists.maipc.org> >
Subject: [MAIPC] Invasive Management as a Selection Pressure
Message-ID:

<CAOO+nP-_XmaoR=nJmKOdZxuS+nhuxZfjwa9o0KjQg1EW7iRKJw at mail.gmail.com
<mailto:CAOO+nP-_XmaoR=nJmKOdZxuS+nhuxZfjwa9o0KjQg1EW7iRKJw at mail.gmail.com>
>
Content-Type: text/plain; charset="utf-8"

It?s well known that pesticide use can cause the development of chemical
resistance in target insects and plants. Based on anecdotal information and
personal observations, non-chemical invasive plant control efforts appear
to be able to cause the development of ?resistance-like? adaptations in
plants. When we engage in sustained management activity on an invasive
plant at a site, we can create selection pressure on the plant. Unwittingly
we may serve like plant breeders trying to create desirable new varieties,
but creating undesirable new varieties that could become more challenging
to manage.

Several examples. These are based on anecdotes and personal observations,
and I am hoping that perhaps some folks will be inspired to gather data and
study this more closely. When Japanese Stiltgrass invades a frequently
mowed area like a managed lawn, I have seen reports that it adapts to
flower and set seed even in the face of the mowing. I have noted that as we
have intensified efforts to control Garlic Mustard by hand pulling, it may
be adapting by flowering and developing viable seed earlier, in advance of
when we have tended to focus our pulling efforts. (I realize that a
confounding factor here is our increasing warming trend.) Also, I think I?m
seeing signs that we are selecting out the tallest, most robust plants, and
seeing more ?stunted? plants that may be harder to spot, yet still produce
seeds. Upper parts of plants may detach more readily leaving viable roots
behind, and un-pulled plants may have a second bloom later in the season.

Finally, over twenty-plus years of pulling English Ivy at Long Branch
Nature Center in Arlington, Virginia, I have noticed recently that more of
the remaining ivy seems to have a new characteristic. The vines seem to be
more fragile. Before, most vines pulled up very cooperatively, leaving few
rooted stem fragments. Now I find more uncooperative vines that go to
pieces on me, creating more work to find and pull all the viable remnants.
I believe that we?ve inadvertently selected for this trait.

In closing, my key point is that we in the invasive plants community should
be conscious of the possibility that we are selecting for resistant traits.
We should monitor for signs and consider changing up our practices
occasionally to reduce the risk of developing non-chemical resistance.

Cheers,

Steve Young, Volunteer, Arlington VA (past MAIPC Treasurer)
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/68d7c
869/attachment-0001.htm>

------------------------------

Subject: Digest Footer

_______________________________________________
MAIPC mailing list
MAIPC at lists.maipc.org <mailto:MAIPC at lists.maipc.org> 
http://lists.maipc.org/listinfo.cgi/maipc-maipc.org

------------------------------

End of MAIPC Digest, Vol 65, Issue 3
************************************

---
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/20170313/a65e2c5e/attachment-0001.htm>