white mold of tomato
White mold-Also known as timber rot when affecting tomato. Portions of the plant may begin to wilt due to lesions on stems. Dark, irregularly shaped sclerotia may be found inside or outside stems and are often associated with a white mold. Fruit may also be affected. Huge host range. More common in greenhouses than in fields.
Figure 1. White mold (timber rot) of tomato. Lesion as base of plant leads to wilt. 
Figure 2. White mold of tomato. Note dry, brittle appearance of stem and dark, irregular sclerotia in and on stem. 
Figure 3. White mold of tomato. Stem has been torn away to reveal sclerotia. 
Figure 4. White mold of tomato fruit.