Koa wilt there are no local hosts, it is suggested that one plant seeds from several different sources in the hope of finding a resistant tree. Currently, research about Koa wilt is focused primarily on determining resistant Koa varieties. Koa is a commodity, a dominant native forest species, and an important element of Hawaiian culture. Koa is highly prized hardwood that can sell for prices as high as $150 a board foot, a special measurement indicating one-foot by one-foot by one-inch wood piece. Koa is currently being grown on plantations to support this high demand, yet some plantations have a 90% tree
ʻAnianiau Its call is a pair of notes, "tew-weet", while its song is a trill of "wee-see, wee-see, wee-see". Anianiau are found in mesic and wet forests at elevations above . The highest densities occur above . Dominant tree species in its habitat include koa ("Acacia koa"), ōhia lehua ("Metrosideros polymorpha"), ōlapa ("Cheirodendron trigynum"), and lapalapa ("C. platyphyllum"). The anianiau mainly feeds on nectar from the flowers of plants such as ōhia lehua ("Metrosideros polymorpha"), ōhelo ("Vaccinium" spp.), and alani ("Melicope" spp.). It will also take arthropods from trees, shrubs, or vines. The anianiau breeding season ranges from February to June.