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Global Invasive Species Team listserve digest #015
Tue, 26 Jan 1999 15:33:06 -0800 (PST)
--CONTENTS--
1. Hackberry Control and GPS suggestions
2. Mapping weed infestations
3. Hackberry Control
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1. Hackberry Control and GPS suggestions
From: Chris Maron (cmaron(at)tnc.org)
On controlling hackberry seedlings: You might consider purchasing a
portable burn unit that operates like a little blow torch. Jack
McGowen-Stinski from the Michigan Field Office uses one to burn buckthorn
seedlings. We purchased one for Indiana but I moved to the Adirondacks
before we had a chance to use it. We got it from Northern Supply or some
name like that. The unit was called something like the "Red Devil" or
"Fire Devil" and operates with propane. I suggest you contact Jack to get
more information.
For Donnelle in Maryland: A suggestion would be to purchase a Global
Positioning System and have someone circle infestations and click as he
circles the weeds; or stand in the middle and click. Also, you might
experiment with aerial photos, maybe with infra red. I've heard about
someone using kites to get aerial photos of small areas. I can't remember
who told me about that person but if Donnelle wants to pursue that
further, have her give me a call and I'll ask around for the person's
name.
Chris Maron
Adirondack Field Office
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2. Mapping weed infestations
From: Jonathan Soll (jsoll(at)tnc.org)
In my relatively limited experience I have found two methods that work
well, 1 kind of low-tech, the other high-tech.
1. Low tech - Use aerial photographs and interns
2. High tech use GIS. GIS units are available that can record the
boundary of a patch as you walk around it. The data can be downloaded and
mapped onto orthophotos or topomaps. You can even enter codes in the
field to indicate density of plants within a patch. The units are sort of
costly (I haven't priced one in a while) but are easy to use.
Jonathan Soll
WAFO
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3. Hackberry Control
From: Bill Kleiman (nachusa(at)essex1.com)
I have not tried to control a bunch of hackberrry, but we occasionally
kill a few of them. I suggest you use 20 - 30% Garlon 4 in mineral oil
with a colorant added (so you know where you have been). We often use a 1
and 1/2 inch paint brush and carry a small tin can with the herbicide in
it. Paint several inches of the bark with the Garlon and you will have a
good kill rate. We often store the can in a 4 gallon bucket with extra
Garlon mix in a detergent bottle that is well labeled. This method has
worked well on gray dogwood, buckthorn, honeysuckle, and young trees of
cherry and elm and hackberry.
If this sounds like too much work you can either keep mowing, or use might
try Krenite herbicide which is a bud inhibitor and only works on woody
species. You might spray this chemical on the foliage in September.
Krenite is expensive and I think more toxic to humans.
Bill Kleiman
Nachusa Grasslands, The Nature Conservancy
2055 Lowden Rd., Franklin Grove, IL 61031
815-456-2340. Fax is 456-2342. nachusa(at)essex1.com
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