Some important fungal tomato diseases show up each year in OH. Growers need to know how to properly identify these diseases and take appropriate control measures. The following are some visual examples of these problems and their symptoms.

	Early Blight on lower leaves of fresh market tomatoes. Growers should pay attention to TOMCAST DSV accumulation if near a reporting station. A. Typical lesions. Close inspection shows lesions have concentric rings. B. Older leaves and necrosis caused by multiple early blight lesions.
Early Blight causing stem cankers on tomato plants. Note lesions on petioles and leaves as indicated by the circles. If allowed to advance, they could cause rapid death of plants in the field. Infection probably occurred on the transplants and this problem has been observed with plants being held for late planting.
Close up of Early Blight lesions. The most distinctive characteristic is the concentric circles of the lesions.
If left untreated, Early Blight lesions can quickly develop around the sepals or fruit scar. Fruits rapidly become unmarketable and secondary fruit rots develop.