Quote:
Originally Posted by Itoero
ok,
But with potassium bicarbonate I should have better results?
Is there any known difference between potassium and sodium bicarbonate as fungicide?
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Yes. There is a good body of scientific research supporting greater efficacy of potassium bicarbonate vs. sodium bicarbonate as a horticultural fungicide. The information is commonly published by reputable academic extension agencies, such as in this PDF link:
https://www.extension.purdue.edu/ext...bp/bp-69-w.pdf
As others have mentioned, neither bicarbonate is effective unless mixed with a surfactant (spreader sticker). I'm currently using GreenCure, a commercially premixed potassium bicarbonate product, for the sake of convenience.