Potassium bicarbonate

Blackbeard said:

Try a local Homebrew store they will have it in the wine section,

Click to expand...

MidnightSun72 said:

The potassium bicarbonate? Yes as well as beer making places.
Does anyone know a cheap source of potassium silicate rather than buying something like power si?

Click to expand...

MidnightSun72 said:

Also is it better to apply silicate foliar or to the pots rather than mess with the resevoir?

Click to expand...

• (a)
  In an experiment on pot-grown plants, the efficacy of root-applied 1.7 mM potassium meta-silicate (pH = 6) was compared with one foliar potassium meta-silicate spray at different concentrations of 10, 20 or 30 mM (pH = 5.5) on powdery mildew and on the production of pathogenesis-related proteins (PRs), in two cucumber cultivars with different resistance to powdery mildew. The conclusion was that foliar-applied Si can effectively control powdery mildew infections, because an effective physical barrier of Si is deposited on the leaf surfaces, and/or the osmotic effect of the applied silicates. The foliar spray did not enhance the systemic acquired resistance, while continuously root-applied Si did enhance the defense reaction through increased levels of PRs such as peroxidase, polyphenol oxidase and chitinase [31].
• (b)
  One or two foliar KSi sprays (28 and 56 mM KSi) were applied to cucumbers plants grown on rock wool. All KSi sprays reduced the powdery mildew infection rates by up to 87% with very little difference between the two KSi concentrations [32].

MidnightSun72 said:

Also is it better to apply silicate foliar or to the pots rather than mess with the resevoir?

Click to expand...

xtsho said:

It doesn't take much and I am still using the 1 pound container of Agsil 16H I bought years ago. I have close to half of it left. Like everything prices have gone up but it's $25 a pound for water soluble powder with free shipping on Amazon. It's a different brand than Agsil 16H but same stuff just different bag.





Some people use it at the root zone. That provides some systemic resistance. I don't use silica products other than as a foliar spray myself. I'm not a believer in adding silica to my feeding regimen.

• (a)
  In an experiment on pot-grown plants, the efficacy of root-applied 1.7 mM potassium meta-silicate (pH = 6) was compared with one foliar potassium meta-silicate spray at different concentrations of 10, 20 or 30 mM (pH = 5.5) on powdery mildew and on the production of pathogenesis-related proteins (PRs), in two cucumber cultivars with different resistance to powdery mildew. The conclusion was that foliar-applied Si can effectively control powdery mildew infections, because an effective physical barrier of Si is deposited on the leaf surfaces, and/or the osmotic effect of the applied silicates. The foliar spray did not enhance the systemic acquired resistance, while continuously root-applied Si did enhance the defense reaction through increased levels of PRs such as peroxidase, polyphenol oxidase and chitinase [31].
• (b)
  One or two foliar KSi sprays (28 and 56 mM KSi) were applied to cucumbers plants grown on rock wool. All KSi sprays reduced the powdery mildew infection rates by up to 87% with very little difference between the two KSi concentrations [32].

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027496/

Click to expand...

xtsho said:

It doesn't take much and I am still using the 1 pound container of Agsil 16H I bought years ago. I have close to half of it left. Like everything prices have gone up but it's $25 a pound for water soluble powder with free shipping on Amazon. It's a different brand than Agsil 16H but same stuff just different bag.





Some people use it at the root zone. That provides some systemic resistance. I don't use silica products other than as a foliar spray myself. I'm not a believer in adding silica to my feeding regimen.

• (a)
  In an experiment on pot-grown plants, the efficacy of root-applied 1.7 mM potassium meta-silicate (pH = 6) was compared with one foliar potassium meta-silicate spray at different concentrations of 10, 20 or 30 mM (pH = 5.5) on powdery mildew and on the production of pathogenesis-related proteins (PRs), in two cucumber cultivars with different resistance to powdery mildew. The conclusion was that foliar-applied Si can effectively control powdery mildew infections, because an effective physical barrier of Si is deposited on the leaf surfaces, and/or the osmotic effect of the applied silicates. The foliar spray did not enhance the systemic acquired resistance, while continuously root-applied Si did enhance the defense reaction through increased levels of PRs such as peroxidase, polyphenol oxidase and chitinase [31].
• (b)
  One or two foliar KSi sprays (28 and 56 mM KSi) were applied to cucumbers plants grown on rock wool. All KSi sprays reduced the powdery mildew infection rates by up to 87% with very little difference between the two KSi concentrations [32].

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027496/

Click to expand...

MidnightSun72 said:

I am more interested in the Si for strengthening the stems and making the plant tougher as Bugby puts it. Some strains I got feel like could do with thicker better branches.

Click to expand...

xtsho said:

It doesn't take much and I am still using the 1 pound container of Agsil 16H I bought years ago. I have close to half of it left. Like everything prices have gone up but it's $25 a pound for water soluble powder with free shipping on Amazon. It's a different brand than Agsil 16H but same stuff just different bag.





Some people use it at the root zone. That provides some systemic resistance. I don't use silica products other than as a foliar spray myself. I'm not a believer in adding silica to my feeding regimen.

• (a)
  In an experiment on pot-grown plants, the efficacy of root-applied 1.7 mM potassium meta-silicate (pH = 6) was compared with one foliar potassium meta-silicate spray at different concentrations of 10, 20 or 30 mM (pH = 5.5) on powdery mildew and on the production of pathogenesis-related proteins (PRs), in two cucumber cultivars with different resistance to powdery mildew. The conclusion was that foliar-applied Si can effectively control powdery mildew infections, because an effective physical barrier of Si is deposited on the leaf surfaces, and/or the osmotic effect of the applied silicates. The foliar spray did not enhance the systemic acquired resistance, while continuously root-applied Si did enhance the defense reaction through increased levels of PRs such as peroxidase, polyphenol oxidase and chitinase [31].
• (b)
  One or two foliar KSi sprays (28 and 56 mM KSi) were applied to cucumbers plants grown on rock wool. All KSi sprays reduced the powdery mildew infection rates by up to 87% with very little difference between the two KSi concentrations [32].

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027496/

Click to expand...

xtsho said:

It doesn't take much and I am still using the 1 pound container of Agsil 16H I bought years ago. I have close to half of it left. Like everything prices have gone up but it's $25 a pound for water soluble powder with free shipping on Amazon. It's a different brand than Agsil 16H but same stuff just different bag.





Some people use it at the root zone. That provides some systemic resistance. I don't use silica products other than as a foliar spray myself. I'm not a believer in adding silica to my feeding regimen.

• (a)
  In an experiment on pot-grown plants, the efficacy of root-applied 1.7 mM potassium meta-silicate (pH = 6) was compared with one foliar potassium meta-silicate spray at different concentrations of 10, 20 or 30 mM (pH = 5.5) on powdery mildew and on the production of pathogenesis-related proteins (PRs), in two cucumber cultivars with different resistance to powdery mildew. The conclusion was that foliar-applied Si can effectively control powdery mildew infections, because an effective physical barrier of Si is deposited on the leaf surfaces, and/or the osmotic effect of the applied silicates. The foliar spray did not enhance the systemic acquired resistance, while continuously root-applied Si did enhance the defense reaction through increased levels of PRs such as peroxidase, polyphenol oxidase and chitinase [31].
• (b)
  One or two foliar KSi sprays (28 and 56 mM KSi) were applied to cucumbers plants grown on rock wool. All KSi sprays reduced the powdery mildew infection rates by up to 87% with very little difference between the two KSi concentrations [32].

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027496/

Click to expand...

MidnightSun72 said:

How much do you typically water?

min a week my room usually uses between 216 gallons and 300gallons a week when packed. It ends up costing a shit ton in nutes and additives lol. So I try to run the least complicated nute regime cuz I hate measuring and mixing and checking PH. I use floraflex cuz the A and B mix and in minutes ans PEKacid as Ph down and to keep my lines clear of calcium build up. And the resevoir stays super stable. That's why I don't want to add the Si to reservoirs. Think I would just hand water it in. I feel like I would go through the stuff like crazy.

Click to expand...

xtsho said:

I'm nowhere near the scale that you are. I wouldn't add it to the reservoir either. If you have things running smooth it's not worth messing around.

I only use it as a foliar. I've used it the root zone before and any benefits were not significant enough for me to bother with it and it did have me fiddling with the reservoir and a few soil grown plants had issues I had never had before or since. I know many people swear by it. I'm not one of them. It is very effective as a foliar against PM and that's all I use it for.

I also use PeKacid for pH down. It's easy to use and I like that it comes in a powder. I don't have anything that comes in a bottle as a liquid. I'm surprised more people aren't using PeKacid as pH down.

Click to expand...

MidnightSun72 said:

How much agsil do you use per litre or gallon?

Click to expand...