Garden Pests and Diseases: Yellow leaf curl virus? Anyone know about this? , 1 by Dragunov79

Dragunov79 wrote:
I posted this on the vegetable gardening thread :
"My Tomatoes are not looking happy. They have been in the garden since the end of March. They started out fine and even started setting fruit but then we had a week of rain... After that week all of the top leaves started curling up and turning a yellowish color. The fruit that was already set is still growing but it isn't setting any new fruit. The fruit on the plants looks healthy though. It is flowering but they die and fall off. Though that may be because of the 90 degree heat. Which I know may also be why new fruit is not setting. But the plants look like they are shriveling up. The new leaves are all curled and do not flatten out at all. I thought it was from the rain splashing but have been treating with docanil for 3 weeks now with no change at all. I will try to attach pictures. Does anyone know what this is and is it something that can be treated?"
Someone mentioned it looks like yellow leaf curl virus. If it is, should I destroy my plants? Can they be treated? I've never run into this one before. Can someone please help???