At least in my orchard Geneva 16 is less vigorous (a lot) than bud-9 or
m-9 on the same variety after 3 years , 30 in my trial. The most
vigorous is Pagam 2, a type of m-9, this is what I like the best, no
more loss from fire blight than the others, Also for what it's worth, of
10 new Geneva 11 rootstocks lined out to bud later, 6 died of fire
blight, these are supposed to be resistant. Lee Elliott, Winchester, Il