I think you might mean Early Blight rather than Late Blight? Any resistance to Late Blight is difficult to document although I know some claim it.

Mountain Magic is the only one I have tried of your list and while it might be a bit more tolerant of EB and Septoria IME it isn't actually resistant. And since it develops anyway I find I'd rather have a better tasting, larger fruit. I wasn't impressed with the size or the flavor personally. It tastes like a store-bought tomato plus it is a very small fruit.

Previous reviews of Mountain Merit here don't seem to praise it especially either.

Dave

Hi Dave

According to what I have read, Defiant has high resistance to late blight, and intermediate resistance to early blight, fusarium wild 1 and 2.

What is the source of your reading? Seed vendors or actual research studies? Seed vendors claim many things that aren't supported by actual research. :) Can you link to them for us?

Dave

I will find the info and get back from you. I believe it is from a University. Mike

Check out Cornell University research paper- Managing late blight in tomato and potato- An essential part of gardening.
www.longislandhort.cornell.edu/vegpath/late. Check out Cornell chronicle as well on Iron Lady tomatoes. http://www.news.cornell.edu/stories/2013/03/ready-plant-iron-lady-tomato-punches-out-blights

There are other articles that support this position, however I am certainly not an expert, just looking for answers too