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
Nin Jiom Pei Pa Koa in 1962, and continue to manufacture and sell the product worldwide. "Pei pa koa" had annual sales of HK$350 million in 2014. A study at the China Academy of Traditional Chinese Medicine published in a 1994 article, "Pharmacological studies of nin jion pei pa koa", states that Nin Jiom Pei Pa Koa had significant cough relieving and sputum removing effects. In four acute or sub-acute inflammatory models, the anti-inflammatory effect was marked.." "Pei pa koa" is made up of a blend of herbal ingredients including the fritillary bulb ("Bulbus fritillariae cirrhosae", 川貝母), loquat leaf ("Eriobotrya japonica", 枇鈀葉), ladybell root ("Adenophora