Marty had asked on orchid board if CO2 was effective against other pests.
A study was done for the greenhouse production of flowering plants
and can be found in
Journal of Economic Entomology Vol. 94(2): 430-438

Daniel Potter of the University of Kentucky, who proposed the study,
was kind enough to send me a PDF of the article, but I have not
yet asked permission to redistribute it as I just received it.

A quick skim indicates that 12-18 hours in a 99% CO2 environment
is 100% effective at killing spider mites and their eggs.
It's also effective at turning a few types of plants to mush...

--
Chris Dukes
Suspicion breeds confidence -- Brazil

On Thu, 01 Sep 2005 01:55:13 GMT in <slrndhcns1.br0.pakrat [at] mouse.private.neotoma.org> ? <pakrat [at] localhost.private.neotoma.org> wrote:
> Daniel Potter of the University of Kentucky, who proposed the study,
> was kind enough to send me a PDF of the article, but I have not
> yet asked permission to redistribute it as I just received it.

And the article is available at http://zeniv.linux.org.uk/~pakrat/anoxia.pdf


--
Chris Dukes
Suspicion breeds confidence -- Brazil

Do you really think that this is a viable and safe method for hobbiests?
First you are looking at renting cylinders of CO2 with regulator, then you
must be able to measure and monitor the level of CO2 from outside the
greenhouse, hold the concentration for the desired length of time, vent the
greenhouse of CO2, then measure the level to ensure life safety.

Floramite isn't that expensive and is a lot less hassle and safer all the
way around for common mite control.

Garland




"?" <pakrat [at] localhost.private.neotoma.org> wrote in message
news:slrndhcns1.br0.pakrat [at] mouse.private.neotoma.org...
> Marty had asked on orchid board if CO2 was effective against other pests.
> A study was done for the greenhouse production of flowering plants
> and can be found in
> Journal of Economic Entomology Vol. 94(2): 430-438
>
> Daniel Potter of the University of Kentucky, who proposed the study,
> was kind enough to send me a PDF of the article, but I have not
> yet asked permission to redistribute it as I just received it.
>
> A quick skim indicates that 12-18 hours in a 99% CO2 environment
> is 100% effective at killing spider mites and their eggs.
> It's also effective at turning a few types of plants to mush...
>
> --
> Chris Dukes
> Suspicion breeds confidence -- Brazil

GARLAND HANSON wrote:
> Do you really think that this is a viable and safe method for hobbiests?
> First you are looking at renting cylinders of CO2 with regulator, then you
> must be able to measure and monitor the level of CO2 from outside the
> greenhouse, hold the concentration for the desired length of time, vent the
> greenhouse of CO2, then measure the level to ensure life safety.


Indeed, 8% CO2 is a lethal concentration for humans, and lesser levels
can make people very sick---headache, hypertension, vomiting, etc. Add
to that the fact CO2 is odorless and tasteless, and you've got a
potential for real problems.


J. Del Col