Hi Rose Marie, I have never been stricken with Sour Rot so I can only generalize about its control. You seem to have taken care of the most common multipliers. You might also destroy any affected fruit and a fungicide such as Daconil might do some good. Have you checked with your Ag Ext. Service to determine if this fungus is seed borne? I think Byron Bromley had a problem with seed borne disease. What company did that come from, Byron? Good gardening, Chuck Wyatt www.heirloomtomatoes.net www.heirloomtomatoes.net