Sounds like blossom-end rot. Usually signifies a lack of calcium and is induced by uneven watering. Helpful to ensure a steady water supply and adding some calcium rich material such as natural ground limestone (agricultural lime), dolomite, wood ashes, bone meal, oyster shells or egg shells. HTH ----- Original Message ----- From: Ron Hay <ronhay@pacbell.net> To: <gardeners@globalgarden.com> Sent: Wednesday, July 21, 1999 11:03 AM Subject: [gardeners] Tomatoes with black fungus > Hi, this year for the first time, we are experiencing a number of > tomatoes, Burpee's Early Girl and Big Girl, developing soft bottoms that > turn black and slightly flattenend, most of which fruit cannot be > salvaged. We carefully dipose of it in the trash so as not to infect our > compost pile. Any clues as to cause/cure? > > Ron, > Van Nuys, CA > USDA 9b, Sunset 20 > >