Pseudocercospora ulei
Pseudocercospora ulei is a fungal plant pathogen infecting rubber trees. The disease is called South American leaf blight and is the reason that rubber tree plantations such as Fordlândia fail in the New World. Under its synonym Microcyclus ulei it has been recognized as a potentially catastrophic threat to the world economy, as there is currently no existing fungicide or treatment. Its genome has been sequenced.