I'm new to the forum and wondered if anyone has any idea how to combat tomato spotted wilt virus. I have three tomato plants that have been very healthy and producing nicely. One of them, however, has produced two tomates with concentric rings and has leaves at the bottom of the plant that are starting to yellow or spot. A master gardener's web site I visited diagnosed the problem as spotted wilt virus. I checked around for ideas on how to kill the virus once it's present or at least keep it in check, but no such luck. Any ideas? Thanks for your help!