Mike and Chelle: I second what Rick said 100%. Virus is a plant 'disease', not a soil 'disease'. I personally take the 'go slow approach' unless it's blatantly obvious, just to be more sure it isn't a symptom of something else, like environment, weather, nutrition, etc. And if the affected plant is in a pretty tight group, I wait until late, late fall to make sure all the stem roots of adjacent plants are dead. Then I'll go in and remove the plant in a clump with as much dirt intact as possible and try my darndest not to tear any stem bublets loose. I've been pretty fortunate in not having many viruses, especially this year with the hot dry weather and lack of insects--especially ants.
There are some older books written by Jan De Graaff that say viruses can live in the soil for two or three years but I don't think anyone subscribes to that thinking today. I don't!
