September 2017 issue of the Cornell Flower Bulb Research Program Research Newsletter:
I am often asked for a recipe for fungicide drenching or dipping prior to planting spring bulb crops. My advice is to consider using products effective against the major disease problems likely to be encountered, Generally, these are Fusarium, Rhizoctonia, Pythium and Botrytis.
Read the whole article. Starts on page 7.