I can't find any info on this. I assume if it can be used in a mix as a spray see this article:
http://plant-disease.ippc.orst.edu/articles.cfm?article_id=14
...that someone somewhere has used it dry??
I have looked around the small towns here for a bulb dust for at least 3 years and I never find any- just liquid fungicides which I'm not interested in using on bulbs- I'd rather have a powder. Every year something starts rotting in the basement for dormant storage for our 7-8 month winter storage season.
I'd rather not buy a product on line if I have it in my kitchen already..
Karen
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Here is a link that might be useful: link to article - hopefully
