What diseases is Brandy Boy F1 supposed to resist? It's supposed to have improved disease-resistance over Brandywine.

Also, just from your own experience, what does it resist? And is it any different disease-wise than other Brandywines, as far as you've noticed?

Well, I found some answers on Dave's Garden:
- aris (and the Dave's Garden article itself) says it's resistant to "Fusarium Wilt, Verticillium Wilt, Root Nematodes, and Tobacco Mosaic (T)" and vouches for the Fusarium and Verticillium resistance (at that point of the season, anyway). I don't know how they know.
- Anecdotal: Early Blight (1 central Florida vote for field resistance; 1 MN vote for seed-starting susceptibility when crowded)
- Anecdotal: An Oregon grower said it resisted a disease that caused them to pull up five Paul Robeson tomato plants.

travis on Tomatoville mentioned giving up an effort to stabilize Brandy Boy, due to it having lost resistance to Fusarium and Verticillium wilts. So, it would seem that the resistance in the F1 is heterozygous unless travis's plants were crossed or something. I'm not sure if john11840's stabilized Brandy Boy has the resistance or not, but I would think so.

Anecdotally I would say it is susceptible to Septoria, but outgrows it and remains productive. Man I love Brandy Boy

This is one I've been meaning to try, I hear a lot of people like it for flavor and they say it's very productive, too.

I had some F2 Brandyboy seeds, I got from a friend, and grew those 2 years ago, and they were fairly resistant to diseases, and delicious, but they weren't very productive, compared to most other varieties, partly because they stopped producing in the low to mid 90s. So last year I got a packet of F1 Brandyboys, and got a little better production, but that's probably because it was a milder summer, and not many higher days in the higher 90s, which is usually when most tomatoes stop producing for me. I would have grown the F1 again, but had too many new varieties this season!

I'm growing 2 this year just because I had seeds leftover from a few years ago & wanted to give them another try. I don't remember being bowled over by it, but I don't remember specifically why either. I have more time now to observe, less varieties to distract me so I guess I'll find out soon.

Unfortunately they were very quick to succumb to fusarium for me last year. This year trying Chef’s Choice Pink and Mountain Rouge to see if I can find an acceptable Brandywine alternative with F resistance. One of them is a Momotaro cross, and Momotaro scoffed at all diseases in our garden last season, so fingers crossed!

@Cranraspberry and everyone else

Has anyone tried Rose or Capsian Pink against Fusarium? What about Aunt Ginny's Purple or Cherokee Purple?

@Shule I have Cherokee Purple growing this year, the Cornell site lists it as resistant to all three fusarium strains, so we’ll see how it does.
Now if I could also find some resistant hearts…