I just had to rip out some previously healthy-looking plants (Prue, Dufresne, Rinaldo) from a corner of the yard that apparently doesn't have adequate air circulation (it's next to a concrete wall, concrete on each side, good sun but high wall). All container plants. Early blight, some sort of mold spot, and the killer, fusarium wilt. Game over, man. Sorry to see them go. I picked and gave away about 12 lbs. of green tomatoes.
Oddly enough, the plants that I'd set out earlier, in the cold, in old potting soil (St. Pierre, Santa Clara Canner) have the foliar disease and have leaves dying from the bottom up, but have not yet suffered vascular collapse and are still erect and healthy. Of course it's just a matter of time, but at least these have lasted longer, and I've even gotten ripe fruit from St. Pierre (nice tomato, by the way, thanks for earlier recommendations all).
I've never seen "in ground" plants suffer this way; I guess having a robust root system helps, and the early transplants set out when the weather hasn't yet warmed up enough for above-ground growth are apparently very busy underground getting good roots in place.
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