Bob, I would be afraid to have tomatoes so close to tobacco. Do you regularly grow it close to tobacco without any problems?
CT
I've grown tobacco and tomatoes within 3 feet of each other for 10 years or so and never had a disease problem. I think a lot of the problems that arise are from using commercial salt fertilizers that kill the microbes in the soil and then spraying toxic chemicals on the plants thereby killing the good bugs. Mother Nature has been at this for a long time. Sticking as close to her as possible will yield good things.