Koa wilt trees. Outrigger canoe racing, often in koa canoes, is still a popular and highly competitive sport of cultural significance. Koa wilt Koa wilt is a relatively new disease to Hawaii, discovered in 1980. Koa wilt is caused by a forma specialis of the fungus "Fusarium oxysporum", which is now abundant in Hawaiian soils and infects the native Acacia koa tree, a once-dominant species in the canopy of Hawaiian forests. Fusarium oxysporum f.sp. koae is believed to have been brought into Hawaii on an ornamental acacia plant. Fusarium fungi clog the tree xylem, causing significant wilt and mortality among these beautiful
Koa people Koa people The Koa are an indigenous Australian people of the state of Queensland. Tasaku Tsunoda and Gavan Breen have speculated that the ethnonym "Koa" may derive from a word *"guwa" meaning 'west'. Walter Roth thought that the Koa language had affinities with that of the Maiawali, forming a linguistic bridge between it and the languages spoken by the Wanamara and Maithakari. Like many other peoples of the area, they had an extensive sign language, indicating a largew number of meanings by gestures. In Norman Tindale's estimation, the Koa's tribal territory ranged over about . Taking the headwaters of Diamantina