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Posted by Scott Simpson on January 28, 2007, 5:46 pm
I cut them to the ground, put RoundUp on them, and they still grow back! How
do I kill these darn things? Thank you.
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Posted by buffalobill on January 28, 2007, 5:57 pm
i don't know but i searched and found your eradication of strelitzia:
http://www.google.com/search?hl=en&q=eradicating+Strelitzia&btnG=Google
+Search
be careful, also see:
http://www.aspca.org/site/PageServer?
pagename=pro_apcc_toxic_birdofparadise/
"Dogs like to eat these plants, but the seeds, if eaten, are toxic,
and can cause abdominal pain and vomiting."
and more plant description at:
http://en.wikipedia.org/wiki/Strelitzia
you might also phone your local university agricultural extension
service.
> I cut them to the ground, put RoundUp on them, and they still grow back! How
> do I kill these darn things? Thank you.
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Posted by Red on January 28, 2007, 6:09 pm
> I cut them to the ground, put RoundUp on them, and they still grow back! How
> do I kill these darn things? Thank you.
Roundup is a selective herbicide and doesn't kill everything. Try a
weed killer containing 2-4-D full strength from the bottle on those
cut back stubs.
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Posted by Harry K on January 28, 2007, 10:39 pm
>
> > I cut them to the ground, put RoundUp on them, and they still grow back! How
> > do I kill these darn things? Thank you.Roundup is a selective herbicide and
doesn't kill everything. Try a
> weed killer containing 2-4-D full strength from the bottle on those
> cut back stubs.
2-4-D will kill top growth. Doesn't do much for killing roots except
if you keep reapplying it will eventually starve the roots - read
_after several years_.
I am unfamiliar with birds of paradise but if round-up takes a 10 or
so days to kill the top growth then it is also killing the roots. May
require reapplication over several years to get all of them though.
I have been spraying morning glory in the lawn for 20 years with 2-4-
D and it still occasionally shows up. The real killing success I have
had is with roundup. Trouble there is that it also kills the grass
arund the morning glory.
Same with Canadian Thistle.
Harry K
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Posted by dpb on January 29, 2007, 11:57 am
>
> > I cut them to the ground, put RoundUp on them, and they still grow back! How
> > do I kill these darn things? Thank you.Roundup is a selective herbicide and
doesn't kill everything. Try a
> weed killer containing 2-4-D full strength from the bottle on those
> cut back stubs.
Actually, it's the other way 'round -- glyphosate (Roundup, et al.) is
a non-selective, systemic herbicide whereas 2,4-D is a broadleaf-
specific selective herbicide. While there are a few plants that are
glyphosate-resistant and some ag crops have been developed
specifically ("Roundup-ready" is Monsanto trade name for cultivated
crops that have been bred for over-the-top application), in general it
will kill or severely damage almost all common decorative plants/
grasses.
Don't have specific data for susceptibility of Bird of Paradise to
either, but time of year and strength of application and form of
application are all potentially quite significant to success. I'd
venture better luck in application on plant before severely pruning it
back for better absorption/takeup, as that's the mechanism to get the
herbicide introduced into the plant. However, as Roundup is non-
selective and will damage if not kill virtually everything it comes in
contact with, be extremely careful in application around anything of
value such as shrubs, trees, valuable perennials, etc.
A good overview on usage is at http://www.ces.ncsu.edu/depts/hort/hil/
hil-648.html
A look at the Roundup application label didn't find it listed but that
could possibly be a case of such a small usage.
The suggestion to contact local Extension Service is a good one.
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