Karen Delahaut, Walt Stevenson
This disease, caused by the common soil fungus Fusarium oxysporum
f. sp. cepae,
can be found wherever onions have been grown long enough to build up sufficient inoculum to initiate disease. Chives and shallots are also affected. Fusarium basal rot can cause crop failure and economic losses. Find out how to spot, prevent, and control for the disorder by reading this handy fact sheet.