Question
My husband and I are attempting to get a second, winter crop from Celebrity tomato plants planted in home-composted soil in a greenhouse in Chandler,Arizona.  The plastic covering holds in heat and moisture and the tomato plants and fruit (very large, some cracked, many spotted)are very wet.  We noticed a black spore-like appearance of the leaves, stems and even the cords tying up the vines. From limited research, it appears that we may need to remove all the vines or resort to some very intense sulfur/copper treatment.  No other plants are infected - the lettuce, spinach, bell pepper, cucumber and strawberry plants are healthy.  Please advise the best, next course of action.
Thank you very much!

Answer
I have found that copper is the best fungicide for tomatoes. I personally use a product called Soap Shield. The fatty acids in the solution result in excellent long-term protection. Unlike many other copper fungicides, there is no need to mix sulfur.

Attached is a website from which the product can be purchased. It also includes a testimony from a gardener who had similar problems with tomatoes.

http://www.gardensalive.com/product.asp?pn=8066&ss=Soap%20Shield

Good luck, and please write again if I can ever be of assistance.

Regards,

Mike