sooby said:
The original study that found dishwashing liquid had effectiveness against daylily rust used it at 1% per measure of water. It was UltraDawn (most likely lemon, definitely not the antibacterial) in whatever formulation it came in at the time (early 2000s). Math is not my strong suit but, if I've got this right, according to my conversion app, a US gallon contains 256 tablespoons (or 768 teaspoons). That would make 1% a dilution of 2.56 tablespoons (or 7.68 teaspoons) of UltraDawn per US gallon of water. Don't anyone try this without checking my math first
I don't believe they tested any other strength so I'm wondering, Peter, if you've tried this and found a teaspoon per gallon effective? It would certainly be better if one could use less, especially outdoors, but that's quite a significant difference.
The study is at:
http://www.uoguelph.ca/%7Ethsi...
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