Iprodion is used on crops affected by Botrytis bunch rot, Brown rot, Sclerotinia and other fungal diseases in plants. It is currently applied in a variety of crops: fruit, vegetables, ornamental trees and scrubs and on lawns. Iprodion (http://www.guidechem.com/cas-367/36734-19-7.html) is a contact fungicide that inhibits the germination of fungal spores and it blocks the growth of the fungal mycelium.
Sodium Bicarbonate solution: Many reference articles point to a sodium bicarbonate solution made from Baking Soda (make sure the baking soda does not contain other elements, just Sodium Bicarbonate), 1tsp Baking Soda, ¼ tsp Neem oil and 1 qt warm water, shake well to mix in the Neem Oil while applying with a mister. I use this method and it seems quite successful.