My tomato plants have been looking worse and worse over the past couple weeks. While I'm certain at this point it could be blight or wilt, my questions are: Do these diseases tend to show up around this time of year? Are they likely in the soil to begin with, but don't attack until now? It seems I have been having this problem for years, late in the season.

Unfortunately I have not practiced crop rotation, due to the limited space I have. If I were to give the beds a break from tomatoes for a couple of years, would this problem still be waiting for the tomatoes when I continued growing again?

Thanks,

Chris