Tropics, are your Sarracenias particularly prone to fungus? Well, mine are. For some reason, both my sarracenias, a "stevensi" and a purpurea, have died from an outbreak of fungus (grey mould I think) which did not affect plants very close to them -- VFTs, sundews, non-CP plants, etc.
And what's more, the fungus is immune to Captan, overdosage or not. They just keep coming back!