Stop tomato curly top virus
 

Had virus on 5 plants first of year.Pulled them out and replanted.I use 5' concrete wire by 2' diameter, 13 squares cir.. Ordered frost cloth and cut and placed over each cage.Covered top and down 2 squares.I used wood clothes pins and very light weight aluminum wire to attach the covers.
No virus in last 2 months.Garden looks strange but appears to be working.
May help us, try and see.Frost cover not shade cloth.
Hope this may help.
Rick

No virus
 

The frost covers I mentioned earlier have eliminated curly top virus on my tomatoes.After covering top of cages 8 weeks no virus.This is working for me hope this may help you.