Arlyn.. I can't help with solarization but after my wipeout a couple years ago I worried about planting in the same soil so I tilled all the berms and added a foot of dirt to them where I would be re planting and very few had problems last spring but the bed on the east side of my house was so large I left it alone and just tilled it and replanted in it and had quite a few plants affected so my guess is it does stay in the soil and you may think about moving the plants to a different area for a year or build a berm over that bed with issues.
