[MAIPC] Phellodendron amurense Treatment Options
Richard Gardner
rtgardner3 at yahoo.com
Tue Mar 15 08:53:18 PDT 2016
Drill and fill is safer and more contained than hack and squirt. I would drill 1/4" holes at least through the vascular cambium every 2" of girth. Then I would spray 50% glyphosate into the holes.
An alternative worth trying would be to drill a 3/8" hole into the center of the tree. Then fill the hole with 50% glyphosate. I tried this with Ailanthus, but the sap was so sticky it grabbed the drill bit after @ 2". If this tree does not grab the drill bit, drilling into the center may be a safer and less intensive method than hack and squirt or drill and fill.
Richard Gardner
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On Tue, 3/15/16, Sitch, Kelly <kesitch at pa.gov> wrote:
Subject: [MAIPC] Phellodendron amurense Treatment Options
To: "'MAIPC at lists.maipc.org'" <MAIPC at lists.maipc.org>
Date: Tuesday, March 15, 2016, 8:44 AM
Hello Everyone,
This spring a significant
infestation of Phellodendron amurense (Amur corktree)
was found in Michaux State Forest (Franklin County, PA near
Chambersburg). We expect that it originated from
individuals planted at the nearby Penn
State Mont Alto Campus and has been present on the State
Forest for some time. They are spread out over
approximately 100 acres, but very patchy. Stems range
in size from 1-2 feet tall and less than 1” DBH to
larger mid-canopy size individuals in the 6-10”
DBH range.
This is a novel invasive
species on the State Forest. As such, we don’t
have a lot of experience with treatment. Our current
thinking is to apply a basal application of Pathfinder II to
all stems less than 4” DBH. We are considering
hack and squirt treatments of 50% Glyphomate 41 to stems
greater than 4” DBH. Our concern is the
corky/spongy nature of the bark as the stems mature could be
a problem for basal treatments, thus the hack and squirt at
larger diameters.
I wanted to reach out to
this group to see if anyone had any experience with
effective treatments for
Phellodendron or could speak to the relative efficacy
of various herbicides/treatments. We plan on doing
some experimenting ourselves with various treatments this
field season, but would like to have our first control
attempt to be as effective as possible.
Thank you
Kelly Sitch
Kelly
Sitch |
Botanist
Pennsylvania
Department of Conservation & Natural Resources
Bureau of Forestry | Ecological Services Section
PO Box 8552, 400
Market St, Harrisburg, PA 17105-8552
Phone: 717.425.5370 |
Fax: 717.772.0271
www.dcnr.state.pa.us
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