I’m in the process of tracking down the rogue Autumn Olive
that I cut and marked a few weeks ago, so I can treat the regrowth with
glyphosate herbicide. Even the most
recently cut stems have produced suitably sized sprouts to receive a sufficient
quantity of herbicide to be effective.
That’s not surprising since these aggressive invasive plants are nearly
impossible to suppress.
I mapped the cut shrubs so I would be able to find them
now. The map shows the approximate
location of the Autumn Olive and identifies the number of marking flags at the
site. I just have to get close and find
all of the flags. I didn’t remove the
flags after spraying. That will be done
in a couple of weeks when I make my final check and treat any sprouts that
managed to miss the spray application.
Some stumps are slower to regrow than others. The stump on the right was sprayed about a
month ago. At that time, the stump on
the left was not showing any green growth.
It has obviously flourished since.
Autumn Olive has a habit of managing some new growth following a
herbicide treatment, so it’s important to make a follow-up visit. I try to make my final rounds during the
first week of June. Anything that’s
going to grow will have done so by then.
It’s also important to get the flags collected before they are hidden by
the rapidly growing vegetation. The wire
stemmed flags I put out this year amount to about a half mile of wire scattered
around my fields. I want to make sure it
all gets removed.
While wandering around with my spray bottle, I treated a few
other alien plants that have the potential for causing a disturbance to native
ecosystems. The large leaves of Common
Burdock, Arctium minus, are a common sight around barn lots and farmsteads where
they can reach impressive sizes. The
plant is a biennial and needs disturbed soil to provide a proper environment
for seed germination. In more natural
landscapes, Burdock usually doesn’t reach the size or plant density displayed
in disturbed areas. It’s not at the top
of the list as a noxious invasive, but it has enough negative qualities to make
its elimination worth the effort. The
large leaves can create a dark enough shadow area that a bare spot is left when
the plant dies. The bare spot becomes an
ideal seed bed for Burdock and other invasive plants. The sticky seed heads are also a hazard to
small animal life. I have found the desiccated
bodies of birds, bats and small mammals that became ensnared by the bristly
hooks present on the seed heads.
Fortunately, this plant easily succumbs to a treatment of
glyphosate. A high percentage of the
plants can be eliminated by applying glyphosate to just the central whorl of
developing leaves. The Burdock dies and
incidental death of neighboring plants is virtually eliminated.
I also treated several Barberry shrubs. These plants are fast becoming a problem in
the woods. I cut the Barberry off a few
inches above the ground and applied glyphosate to the freshly cut stubs. This treatment method is effective on many
woody plants, but I’ve never before tried it on Barberry. I thought this was a good time to put it to a
test. The plants were going to produce
fruit this year, so cutting them eliminated the fruit and if the spray doesn’t
kill them, at least it didn’t do them any good.
I wish I could do as well getting rid of what I don't want in my little garden.
ReplyDeleteThat's quite a job!
ReplyDeleteThank you for these invasive posts. Very informative, inspiring, and helpful at approaching the problem.
ReplyDeleteI personally have been clearing barberry, multiflora rosa, invasive honeysuckles (Lonicera tatarica), and chinese wisteria out of a urban backyard. This approaches have allow proper identification as well as removal approaches depending what else is growing nearby.
Hi Lois. After I get Blue Jay Barrens cleaned up, I'll come in to town and take care of your garden. How about the second Sunday in May, 2043.
ReplyDeleteHi Pat. It's enjoyable work.
Thanks Dave. I wish more people would take the initiative and control invasives on their property. Good Luck in your efforts.