aSpecified with reference to Cook [30] and Waage et al. [36] using distributions defined in Biosecurity Australia [31]; b Derived from Sapoukhina et al. [37]; c ABS [6], Note 1ha  = 10 000 m2; d Ulubasoglu et al. [38]; e Assumes average density of planting of 2 000 stems/ha and removal, transport, destruction and chemical costs amounting to $20/tree. This is inclusive of labour (team of three at $50/hr per person), bulldozing equipment ($100/hr at 20 hr/ha), truck hire ($75/hr), incendiaries ($60/ha for green waste) and creation of a circular chemical buffer zone approximately 5 ha in diameter around previously infected sites. Chemical used is assumed to be dithane (applied at a rate of 3 kg/ha or $25/ha) and oil (applied at 3L/ha or $10/ha) at fortnightly intervals rotated with propiconazole (applied at a rate of 0.3L/ha or $5/ha). Assume 2 additional dithane treatments are required and 4 propiconazole treatments (and therefore 6 additional oil treatments), each taking 1 hr/ha to apply; f Assumes: (i) labour costs of $50/ha (i.e. 1 application × 1hr/ha × $50/hr); (ii) 75 mL of chemical solution is used per banana plant per treatment costing $10/L (e.g. dimethoate diluted to 75 mL/100L) (i.e. approximately $15/ha); and (iii) two additional chemical treatments will provide sufficient suppression of banana aphid [30].