http://www.using-hydrogen-pero... you might get some tips, here, MaryAnn. I used an H202 spray / drench, last year, in an effort to stop the botrytis......it *may* have helped..
...it's hard to say.....
.....but, for sure, it didn't stop it
. I read of using it in an old gardening book (2 cups of 3% H202, to 1 gallon of water), and gave it a try.