The mix,as I remember, was one cup of peroxide (3%...that's what you would get in the drugstore) to 1 gallon of water. Another book said 1 & 1/2 cups. I have used the Listerene (actually a "Walmart substitute" !) for quite a few years, and have had good luck with it.I use it, undiluted, in a spray bottle, and anything that looks "iffy", gets a good squirt. I also, if it's a large wound (or where I may have 'scraped" a rhizome) dust with either Comet, or, powdered limestone.
I will add this comment...I have never had ANY trouble with borers, leaf spot, or any kind of rot, in beds that have been "burnt over', the year before. If the "burning" really helps
, I don't know...but I can see no actual harm done by it, so, I'll continue burning, on the premise that "it 'might" help, and doesn't hurt"
