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Tropical Fruit Discussion / Re: Alternatives to Copper(II) hydroxide for root pruning paint
« on: February 09, 2018, 02:39:49 PM »DIY formula. http://tropicalfruitforum.com/index.php?topic=3239.0
FWIW it's worth, been using root tip pruning systems for decades. Copper paints are about the best.
Thank you Mark, actually that was the thread from which I got the info. I found more info about it, see below
Copper sulfate and ammonia (to make CuOH2) though that would be a pain
Both CuO and Cu2(OH)3Cl should put a dent in fungi and prune/suppress roots. No idea if you would want to use them or not and this isn’t advice to do either. I would lean towards copper oxide being ok, see if you can find anything on it being used. How about copper carbonate?
You were right Ulfr, I think that all 4 of them would work. I follow your tip and searched for info and I found a patent which explain this:
"Preferably, the water-insoluble copper compound is in powder form and selected from the group consisting of copper oxychloride, copper oxide, copper carbonate and copper hydroxide.The particle size of the compound in powder form is preferably in the range of 0.5 to 2 microns. Suitable copper compounds meeting the above requirements are commercialized by GRIFFIN CORP. under the trademarks KOCIDE 101 or SPIN OUT FP. These compounds contain proprietary ingredients enhancing the dispersion and activity of the basic copper compound, which is preferably copper hydroxide. As aforesaid, the copper compound acts as a growth regulator by chemically pruning the rootlets and radicles that come in contact with it."
Here the patent: https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US5575112.pdf
Now I must find out how much copper oxychloride (which is the easiest to find here) I must add to one litre of latex paint to make it work.

Thank you both.




