Rediscovery of the rust Diabole cubensis, released as a classical biological control agent against the invasive weed Mimosa pigra in Australia

The neotropical rust Diabole cubensis was introduced as a biological control agent against the weed Mimosa pigra in the Northern Territory during the period 19961999. It was thought to have failed to establish as it had not been observed since then. In 2011, D. cubensis was detected on M. pigra plants on the Finniss River and Daly River floodplains, 12 years after its introduction. In 2012, the fungus was also detected on the Mary and Adelaide River floodplains. Details of these findings, a description and illustrations of the rust fungus are included.