Last year, rather foolishly, I bought some plants from a boot sale, although
already having a number of plants growing in the green house, after they
were all put out into the garden they were all growing well until the boot
plants suddenly started to show signs of something wrong, they them started
to die, and whatever it was found it's way onto my own tomatoes, I dug them
all out, but did not either put them on the compost heap, or dispose of them
in any other way, they lay on the path until they just rotted away.

Now, the big question is, will this virus remain in/on the soil, so if I do
plant more tomatoes will they all suffer the same fate?

If that is likely, what can I do to stop this happening?

Alan