[APWG] What caused surprise results in Poppy Project?
craig at astreet.com
craig at astreet.com
Fri Sep 13 20:50:13 CDT 2013
Dear Robert and All,
Sorry you don't like pots? How about a
one foot by two foot flat that is four inches deep, as an ex situ test
pot?
You can see that same result in two flats at
http://www.ecoseeds.com/good.example.html.
Not damping off, in
either case.
Sincerely, Craig Dremann (650)
325-7333
> Hi Craig
>
> Putting soil in pots changes the entire ecology of the experiment. I
hate
> it when people do pot studies on plants that are growing in
natural
> settings and try to extrapolate that data into the real world. Your
plants
> most likely died from damping off, a common complex of fungal
pathogens
> that is most virulent in containers and much less so in the real
world.
>
> Bob
>
> ________________________________
>
From: APWG [apwg-bounces at lists.plantconservation.org] on behalf of
> craig at astreet.com [craig at astreet.com]
> Sent: Wednesday, September 11, 2013 1:41 PM
> To: apwg at lists.plantconservation.org; craig at ecoseeds.com
> Subject: [APWG] What caused surprise results in Poppy Project,
where
> seedlings all died?
>
>
> Dear All,
>
>
>
>From my Poppy Project in Palo Alto, California, (Google = Poppy
> Project+Arastradero) I took soil samples from under the poppies
where
> they had been shedding seeds this summer from locations 10 feet
apart, and
> put the soil into 4 inch plastic pots.
>
> I watered the pots and within a few weeks, had a lush growth of
poppy
> seedlings in both pots. Both pots were side-by-side evenly watered
and
> neither were fertilized.
>
> However, within a month, every single poppy seedling in one pot died,
and
> you can see a picture of both pots at
> http://www.ecoseeds.com/what-difference.jpg.
>
> These pot-tests of checking soil samples from the future
revegetation
> sites have become the standard for Caltrans for their projects, ever
since
> I taught them classes on the use of native plants 13 years ago, to
> discover and correct this problem.
>
> This is the second time I have encountered this very important issue
in
> such a dramatic way that is often overlooked, when trying to get
native
> plants established here in the West---so any guesses of what the
> difference was?
>
> Sincerely, Craig Dremann (650) 325-7333
>
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