Belly Rot is caused by several fungi including Rhizoctonia Solani. Fruit decays at the area in contact with soil. The rot begins as a small water soaked area that quickly spreads. In many cases, the area will be surrounded by a profuse growth of white mycelium. The disease is most severe during periods of rainfall and high temperature, when the soil remains wet for long periods of time. To control, use well-drained soils, or plant on plastic mulch.