Rabbit haemorrhagic disease escaped containment from an Australian Government research facility and spread across Australia. Rabbit hemorrhagic disease was subsequently legalised for the control of wild rabbits. The moth "Cactoblastis cactorum" was introduced for the control of prickly pear, and the salvinia weevil "Cyrtobagous salviniae" for the control of aquatic weed "Salvinia". More doubtful biological controls were the cane toad, which was introduced to control the sugar cane destroying cane beetle; instead the cane toad ate anything and everything else—the beetle was not its preferred food source given choice. The cane toad in Australia has become the biological control that is most infamous for having been a complete failure as well as becoming an environmental nightmare. Walter Froggatt, an economic entomologist, warned of this likelihood at the time. It has also led to much public concern and caution when considering the introduction of new biological controls.