Hi, I planted several tomato plants for the first time using a Japanese Tomato Ring. The plants are over 5' high and have shown tremendous vigor. They are full of tomatoes (none ripe yet, though). The spot I planted them in has not had other tomato plantings before.

I have fought with bacterial blight early on and then lots of tomato fruitworms. BT-K helped with the fruitworms and I used copper for the blight.

Lately, what I thought was the blight early on seems to have returned. Older leaves are developing brown, necrotic(?) spots, the leaves dry up and the stem eventually turns yellow and falls off. What is this and what can I do at this point (plants are full of fruit and still blooming). Also, I try to go as pesticide/chemical free as possible so I am open to alternative methods.....

Here are pics:

http://photobucket.com/tomatoproblems

THANKS SO MUCH!