Fusarium is common in most soils around the US.-The varieties that affect other members of the solanum family(tomatoes,potatoes,peppers,etc)also attack brugs.It will show up as lesions around the leaf nodes or as a larger mass, on the main trunk,at ground level.These pictures do not show Stanglebrand which is just one more variety.SB will look similar but has a distinctive black ring around the lesion.Thankfully,I don't have any pictures of that one.
