Thanks for the comprehensive disease indentification page. Unfortunately, it appears to be late blight. It's strange that I didn't notice this until just a couple of days ago. The disease has progressed rapidly. It is especially bad on the Gold Nugget which had been doing so well all summer. It's nearly completely destroyed the Quali T-23. Almost every branch has those characteric water soaked lesions. Much of the foilage is infected. A half dozen other plants have mild to moderate symptoms. Another half a dozen have not yet shown any signs of late blight. And now it's even gotten to the wonderful Purple Calabash. Just when they finally got well-established. The causes were probably the cool, humid weather, the fact they were planted close together, lack of nutrients stressing the plants, and most importantly, the mistake of planting tomatoes in the same location for 2 consecutive seasons.

Anyways, can cuttings be taken from non-infected branches? Can late blight spread to peppers? Is there a (practical) way to sterilize the soil so tomatoes can be grown next year?