On 7/18/2016 9:56 AM, John McGaw wrote:
Is there anything practical that can be done? My couple of
container-grown 'Patio' tomato plants produce loads of tomatoes, more
than I can use actually, but they all invariably develop the typical
sunken then darkened spots of anthracnose at about the time they ripen
properly. Even those that look OK quickly turn when brought into the
kitchen. I use fresh commercial planting mix every year so the disease
should not be from that source. All I can figure is that it is 'in the
air' since we have had a large percentage of our native dogwoods succumb
to anthracnose in recent decades. Every year is seems that some plague
or another attacks my tomatoes -- I'm about ready to give up on fresh
tomatoes.

I'm having the same problem. Maybe spraying in advance next year might
prevent it but I hear once in the soil there is nothing to do except
replace the soil. I replaced all of mine on deck 10 ft above ground
level but it appears to be back. Often wonder if source might be nursery
supplying seedlings. If you are having same problem maybe it is the plants.

I usually grow full size plants but nursery talked me into buying patio
tomatoes and watering less. Yield this year will hardly make it worth it.

There is a guy on a main road only a mile away that plants heirlooms and
sells tomatoes with no problem. I had talked to him about this and the
University of Delaware had told him once the fungus was there only
solution was to completely replace the soil. I've been through spraying
and once started seems to never stop. I cloned a couple of his
heirlooms but still got some fungus.