Hello Thanks so much to all of you who took the time to help us out with our tomato problem. The web pages with the pictures really were the thing that did the trick! We determined from the pictures and descriptions that we have Septoria Leaf Spot (Septoria blight). We have been removing the affected leaves and using the fungicide recommended. My husband was surprised to learn that he should not be watering from the top of the plant but from the bottom! (some day he will learn to love this computer too!) Thank you again for all of your help. Mary Fry The Thumb of MI Zone 5