Romix
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Extracting Stevioside from Stevia
Is it possible to extract Stevioside from Stevia plant leaves?
Bugs were terrorizing my plant, first I've boiled some tobacco and sprayed solution all over the plant. Bugs disappeared for few days but then came
back. So I sprayed it with a pesticide bought online, now I'm scared brewing leaves in a tea.
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zinc finger
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It is possible. I am only not sure how much leaves you would need.
I would try using hot ethanol on crushed leaves, filtering and then precipitating it in ice cold water. Purifying it should be possible via
recrystallisation.
[Edited on 21-5-2021 by zinc finger]
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Opylation
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If you're trying to keep the plant, some warm water with dish soap sprayed onto the plant daily (more if you'd like) will kill any insects. This is
because the oleophilic soap will dissolve the exoskeleton of the insect. It can take a day or two to notice affects. I've used this for killing aphids
on the plants in my garden
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Aloesci
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One paper describes using 200g dried leaves to 1L water.
They used increased pressure and temperature for 20 minutes and 'wine pressed' the resulting mixture to obtain a solution.
When the solution was dried, their powder was over 50% steviolglycosides.
I'm guessing these could be re-crystalised or puritified with food grade ethanol.
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draculic acid69
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I cold water extracted a handful of dried Stevia once and while the resulting solution was sweet the bitterness that was also extracted overpowered
the sweetness making it unusable. I can't imagine this will improve with heat and pressure. I also doubt ethanol will not suffer the same problem. And
to top it off I call bullshit on the companies that say "we only use water to extract the glycosides". How do U get a white powder from a green leaf
that makes water turn green using water. I suppose if you extract everyother component with hexanes or whatever before using water to extract the
glycosides it's really just lying by omission
[Edited on 21-5-2021 by draculic acid69]
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draculic acid69
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Quote: Originally posted by Romix  | Is it possible to extract Stevioside from Stevia plant leaves?
Bugs were terrorizing my plant, first I've boiled some tobacco and sprayed solution all over the plant. Bugs disappeared for few days but then came
back. So I sprayed it with a pesticide bought online, now I'm scared brewing leaves in a tea. |
Unless your pesticide is food safe or breaks down completely
after a set period of time I would pass on it.
Does the package of your pesticide say anything about
using it on food crops?
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unionised
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It's reasonably easy to extract the Steviosides you want.
What's more difficult is not extracting nicotine along with it.
There's a reason why nicotine is no longer licensed as an insecticide.
It is more toxic to people than it is to insects.
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Texium
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| Quote: Originally posted by Romix | Is it possible to extract Stevioside from Stevia plant leaves?
Bugs were terrorizing my plant, first I've boiled some tobacco and sprayed solution all over the plant. Bugs disappeared for few days but then came
back. So I sprayed it with a pesticide bought online, now I'm scared brewing leaves in a tea. |
Good job, you
rendered an edible plant inedible. Sure you could try to extract the glycosides, but how will you know that you succeeded in removing the pesticides,
and didn’t actually just concentrate them along with your desired glycosides? You might as well ditch the plant unless you just want to keep it as
an ornamental.
| Quote: Originally posted by draculic acid69 | | And to top it off I call bullshit on the companies that say "we only use water to extract the glycosides". How do U get a white powder from a green
leaf that makes water turn green using water. I suppose if you extract everyother component with hexanes or whatever before using water to extract the
glycosides it's really just lying by omission |
They probably just filter the extract through activated carbon
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Texium
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Thread Moved
21-5-2021 at 04:54 |
draculic acid69
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I doubt carbon alone would get the colour out.
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zinc finger
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http://dx.doi.org/10.15174/au.2017.1209
Seems reasonable according to this paper
As the DOI does not seem to work:
Link
[Edited on 21-5-2021 by zinc finger]
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pneumatician
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Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **
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You can do it but the medicinal properties are removed. If you only have a plant, remove by hand the bugs... use natural predators... remove bugs and
enclose the plant in a net...
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karlos³
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I always liked using Chrysopidae larvae, which you can buy as eggs easily and cheap.
And those guys have a voracious hunger... and for some reason, they liked to crawl over my computer screen, probably because it was warm... one bit me
in the finger on accident, I wiped it away and only then saw one of those brave lions had died...
And two months later you have the adult lacewings in your rooms which can easily be shooed away.
Get some of those killers, its one of the best bug-treatments for plants, except maybe for spidermites.
Yeah they might look bad... they absolutely are though... but they are killers!
Best against aphids, their natural prey... german name is even related to this, its translated "aphid lion"(Blattlauslöwe).
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Romix
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What I noticed about Stevia, that bugs only appearing on a leaves that are close to lamp, the ones are in a shadow doesn't have any!
Possibly light destroys natural pesticides in a plant?
Or maybe it's just warmer for them there...
[Edited on 23-5-2021 by Romix]
[Edited on 23-5-2021 by Romix]
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