Margaret, sorry to hear that you lost most of your bulbs. What is more interesting is that 3 did not get sick. Maybe those cultivars are more resistant to what ever is doing this. At least half of mine, which are outside year round, do the same thing in mid to late summer, The leaves get big red patches that spread down to the ground. I pull off all the rotten leaves and the bulbs put out a second flush of growth in the fall that seems to be OK. I'm wondering if this is an environmental issue fostering disease on the leaves rather than a disease of the actual bulb. I don't discard the bulb until it is obviously mushy. I also don't trade bulbs, so I am not unintentionally passing on any residual disease to someone else. Margaret, now you have room for new bulbs.