There has also been research concerning the bacteria strain "bacillus amyloliquefaciens" as a biocontrol agent against fusarium.
https://scholar.google.com/scholar?s...t=0,5&as_vis=1
There are several products on the market containing a strain of bacillus amyloliquefaciens which are not expensive. I have ordered some for the possible benefit against gray mold and early blight.