[MAIPC] herbicide travel distance in Japanese honeysuckle runners??

Wed Apr 14 07:04:55 PDT 2021

It is critical to remove the vines of Japanese honeysuckle going high up the trees. Deer do not climb up the trees, of course. Deer are now under control in my local park and the Japanese honeysuckle came back in large amounts, but only where we did not complete the removal of the vines up the trees.

Marc imlay

Maryland Sierra Natural Places Committee.

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Nathan Hartshorne
Sent: Tuesday, April 13, 2021 1:06 PM
To: Hamersky Business <william at skyhammer.com>
Cc: MAIPC Listserve (maipc at lists.maipc.org) <maipc at lists.maipc.org>
Subject: Re: [MAIPC] herbicide travel distance in Japanese honeysuckle runners??

I'm never one to say don't control invasives, but it is worth pointing out that deer often provide a lot of control of japanese honeysuckle, especially when they are overpopulated, which is pretty common.  So depending on the browse you see, you can even focus on other species.  One big drawback of deer fences for restoration projects is that I would then have to deal with a lot of honeysuckle climbing up the baby trees.  Obviously the control the deer provide isn't perfect, so it's good to do your sprays anyways, but it's rare when we can enjoy deer doing something so good, so I like to bring it up.

On Tue, Apr 13, 2021 at 12:18 PM Hamersky Business <william at skyhammer.com <mailto:william at skyhammer.com> > wrote:

Thanks for the speedy replies everyone!  

I was using 2-3% glyphosate.  

If it matters, I have the option of Candor or 3-D to use on these guys.

William Hamersky
Skyhammer
470 Taylors Gap Rd
Charlottesville, VA  22903

cel:  415. 516. 2560

william at skyhammer.com <mailto:william at skyhammer.com> 

“The Ash, having fibres tenacious and strong,
Teaches me firm resistance, to battle with wrong."
      Helen O. Hoyt

On Apr 13, 2021, at 7:36 AM, Mark Frey <runcator at gmail.com <mailto:runcator at gmail.com> > wrote:

William

It really depends heavily on the herbicide used. Some herbicides travel in roots and some don't. Some herbicides travel far in soils and some don't. I don't know of research applicable to runners in particular but there are certainly many research projects on efficacy of herbicide X on species Y. 

I just did a quick search in Google Scholar and found a few old resources for this species in particular:

Regehr, D. L., & Frey, D. R. (1988). Selective control of Japanese honeysuckle (Lonicera japonica). Weed Technology, 139-143.

Evans, J. E. (1984). Japanese honeysuckle (Lonicera japonica): a literature review of management practices. Natural Areas Journal, 4-10.

 <https://www.invasive.org/gist/esadocs/documnts/lonijap.pdf> Nuzzo, V. (1997). Element stewardship abstract for Lonicera japonica. Nature Conservancy, Arlington, VA.

The Element Stewardship Abstracts are usually very useful for management. These documents were being produced back when TNC had a robust invasive species program and I have found them to be very useful for decades. Obviously, new research is not captured in these documents and some of the chemicals outlined in them and not ones many natural area managers would like to use if they could be avoided. But, they are a good place to start.

Mark

On Mon, Apr 12, 2021 at 10:00 PM Hamersky Business <william at skyhammer.com <mailto:william at skyhammer.com> > wrote:

Hi All,

New to the MAIPC list mail, but have been reducing invasives on my property for the 6 years I’ve lived in Virginia, and also belong to Blue Ridge PRISM. 

I’ve been foliar spraying young J honeysuckle sprouts on the farm for a few days now and was wondering if anyone has info or knows of research on “just how far” the herbicide can travel along the runners before it is no longer effective? I’m guessing you all know that you can pull up one young sprout and have 3, 4, 5, or more runners attached to it, many with other “sproutlets” attached that will eventually root and create independent plants.  Incidentally, when I did occasionally pull up a sprout attached with runners, often their small “siblings" were invisible under the leaf litter.  

So my question is: is there any research out there showing the efficacy of herbicide treatment on invasive runners? Is it worthwhile to herbicide treat these groups of plants, or just keep pulling and pulling (exposing lots of bare soil in the meantime and who knows how many other weed/invasive seeds!) and see how far I can go… hopefully not to the next county.

Thanks so much for any help/input/direction!

William Hamersky
Skyhammer
470 Taylors Gap Rd
Charlottesville, VA  22903

cel:  415. 516. 2560

william at skyhammer.com <mailto:william at skyhammer.com> 

“The Ash, having fibres tenacious and strong,
Teaches me firm resistance, to battle with wrong."
      Helen O. Hoyt

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