Date: Tue, 4 Apr 2000 17:01:38 -0700 From: Kevin Snively <ksnive@ricochet.net> To: cp@opus.hpl.hp.com Message-Id: <aabcdefg1014$foo@default> Subject: Re: Using poison on introduced carnivorous plants
On Tue, 04 Apr 2000, you wrote:
> The Drosera capensis plants in California would be quite difficult to
> remove by herbicide because, as you note, the water is so plentiful. An
> herbicide and application method would have to be designed carefully so
> you do not hit non-targets. Unfortunately, the exotics are growing among
> grasses and trees, and these could be damaged by herbicides, too. The
> presence of (native) D. rotundifolia complicates the matter.
In this case thinking o/s the box might help. Try Nitrogen, or
Calcium. In medium sized doses it is fatal to Drosera. A small
amount of incidental damage will heal its self in 1 or 2 years
and it wont linger in any harmful way like say agent orange or
2-4D. will. Pyrethrum esp. when mixed with citrus oil also is
known to clobber Drosera but will need to be used a few times to
really ko the plants.
> The more I think about this, I think that the best thing to do
> would be to map the infestation, and try manual removal as
> much as you can
chances are you will end up with twice as many next year as you
start with. You might try covering them with a PVC sheet clear or
black and cooking them in the sun. Remember not all the earth
takes as long to heal its self as an alpine meadow. Given a chance
life takes hold. Thats why we even have weeds to begin with.
The real question is how to kill the seed?
krs
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