In this photo you will see small, darker green spots on these tomatoes. These spots are a disease called Botrytis.
This is a photo of timber rot on a tomato plant.
- This comes along with the timber rot. It is called Sclerotinia. The small black seed like figures you see inside the stem are the Sclerotia. This is a soil born disease and can stay in your soil for as many as 10 years or longer.
What you see in this photo is called Early Blight.
Click here for more information on these diseases and a few others