Tomato wilt/virus???
 

My tomatoes in the greenhouse are beginning to wilt. The leaves are
shrivelling up and going black, the leaf veins and some of the trunks are
turning an orange-brown colour. New growth is OK, but I think it is a
matter of time before it also gets affected. Tomatoes in the vegetable
garden are going fine.

I would appreciate any help you can offer.

Thanks

Ian
(Melbourne)