Q.bulb storage
My father is looking for a “bulb dust” that helps prevent disease and fungus in winter stored bulbs for various flowers and plants. It only takes a small amount sprinkled on bulbs, as they are readied for storage. He had some years ago and used the last of it last year and didn’t write the name down. Cannot find it or anybody with knowledge of it here in town (Great Falls, Mt) this fall. Any help will be much appreciated. Thank you.

Certified GKH Gardening Expert
There are a few things it could have been, some of which are no longer available due to toxicity.
Some of the dusts that are still on the market have sulfur dust. If you search for that, you can find them. Bonide is an organic bulb dust that you can buy as well.