[pbs] Equisetum control
Rodger Whitlock
totototo at mail.pacificcoast.net
Mon Aug 4 16:45:08 EDT 2003
On 3 Aug 03 at 21:28, Roy Sachs wrote:
> Has anyone out there had experience controlling horsetails with
> herbicides?
>
> The more I pull them up the more that rhizome growth is stimulated
> rhizome or something wild is happening since the area of infestation
> has expanded at least 5-fold in five years.
The herbicide MCPA will control horsetail. I do not know if it is
still available.
By control, I mean about 95% kill. Treat once, wait long enough for
surviving rhizomes to re-shoot, then treat a second time. The
infestation should then be sparse enough for *digging* of remaining
lively rhizomes to be effective, but you still face several years'
vigilance.
Note that horsetail has paired tubers at intervals along the
rhizomes. It is definitely a survivor!
MCPA is not a selective herbicide, so the ground must be fallow to
use it on horsetail, or contain only weeds.
--
Rodger Whitlock
Victoria, British Columbia, Canada
"To co-work is human,
to cow-ork, bovine."
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