Larry - I agree .... I am doing it by trial and error. Was sorry to see Red Volunteer showing rust in your above photo. It is listed as showing a 1.1 rust resistance rating. Ha! so much for those ratings ....
I think that different strains of rust can come in and hit even plants that were originally listed as rust resistant. The other thing is the actual number rating. A "shows rust resistance" notation may mean that it does get some rust, but certainly not a 5.0 rating for rust susceptibility. The rating system is hard for me to comprehend, truth be told.
