I have grown tomatoes for many years now, but have never had a rotten or black inside. It isn't something that is apparent from the exterior of the tomato? I put a bit of calcium nitrate around the plants when I planted them as I was told that it helped with blossom end rot. I used to always add a bit of lime to bottom of the hole when I planted them, but I forgot this year. This should be a bumper crop year for tomatoes, with all the heat that we have had. Any ideas would be appreciated.
there seems to be an issue - both in canada and the us - with blight this year. same/similar fungus that caused the 'great potato famine' in ireland. have no idea if there's anything that can be used to treat it. i would say that you should planted anything in that family in the general area of where you've got the tom's planted this year...give some time for the fungus to die off.
I occasionaly see a type of black rot on the inside of ripe tomatoes, but it has been very rare; so I've never tried to do anything about it. Regarding blight, if your tomatoes aren't covered to keep off the inevitable rain, I recommend spraying them with fixed copper. This has worked pretty well for me, and I only spray when rain is expected within a day or two. So far in this hot dry summer, I haven't sprayed at all; and I haven't seen any sign of blight. However, rain is in the forecast finally; so I expect to be spraying this weekend.
