Potassium Silicate foliar spray against fungi?

nikthegreek(9b/10a E of Athens)March 27, 2014

Has anybody experimented with the use of potassium silicate (an alkaline foliar spray containing silicon oxide and potassium carbonate) to provide some control of rose leaf fungal diseases? I'm currently experimenting with the use of a potassium silicate product for the control of citrus leaf miner (totally different mode of action supposedly strengthening the epidermal cells, if it works) and I thought to experiment a bit with its use on roses. I'm particularly interested in powdery mildew.
Nik

Here is a link that might be useful: Potassium Silicate for use in crop production

This post was edited by nikthegreek on Thu, Mar 27, 14 at 4:58

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nikthegreek(9b/10a E of Athens)

Thanks for the links.
Nik

    Bookmark   March 27, 2014 at 11:27AM
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nikthegreek(9b/10a E of Athens)

Most of the references I can find discuss root application (hydroponics or soil drenching). I wonder if foliar applications can be effective and if they might have some negative effect by limiting the ability of the leaf to perform its functions.

Will do a little testing and report back although a minimally scientific test will have to wait until next year when I will be able to obtain from the same source multiple copies of a rose known to mildew badly in my garden (Duchesse de Brabant springs to mind).

The concoction I have in hand is very alkaline (pH > 9) even when diluted at the recommended rate and I wonder if this property might just have some effect regardless of the silica content. The same might apply to the potassium carbonate that is bound with the silicon oxide.
Nik

    Bookmark   March 27, 2014 at 12:10PM
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henry_kuska

This is a research leaf application paper.

http://hortsci.ashspublications.org/content/35/4/773.full.pdf

Here is a link that might be useful: link for above

    Bookmark   March 27, 2014 at 8:34PM
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