Koa is vulnerable to infection by koa wilt. This makes Koa ukuleles very distinguishable by sound. In Ancient Hawaii, canoes were carved from the trunks of very old koa trees. The guitar is finished with a flamed koa headplate and snowflake fingerboard inlays. There are also campground facilities named Indiana Beach/Monticello KOA containing approximately 1,000 camp sites. Medeiros is the host and performer at the Hale Koa Hotel's luau in Waikiki. Adults eat the sap of "koa" ("Acacia koa") trees. The wood is denser, harder, and more finely grained than koa wood. The trunks of koa trees were used by the ancient Hawaiians to build their surfboards. Cook also brought two Maori from Queen Charlotte Sound, Te Weherua and Koa. Made from the wood of a koa tree, it was long and weighed . By 1972, 10 years after KOA's creation, KOA had 600 franchise campgrounds. "Pei pa koa" had annual sales of HK$350 million in 2014. Brown currently hosts a radio talk show on 850 KOA in Denver, Colorado. Flowers of the koa tree are pale-yellow spherical racemes with a diameter of .