Regarding Sulfur:
This is completely anecdotal, and might just be correlation, rather than causation, but my plants came down with what Im prettry sure is fusarium. I gave them a heavy spray of sulfur, and a watering with some sulfur. Then for a few waterings, Id thrown in a splash of sulfur.
They’re 3 weeks into flower, and so far, it doesnt appear to be spreading any further. My plan was, and is, the first sign that its spreading within the plant, i’ll cull them.
Btw, there’s a chance it isnt fusarium, thats just what I came up with. If anyone checks it out, and knows different, it would be nice to know, but in mean time Im treating as if it is.
Also, on a side note, its my understanding sulfur is a good general pest control too, but IDK.