Koa wilt They are a dominant forest species. Koa wilt has been found on the islands of Kauaʻi, Oʻahu, Maui, and Hawaiʻi. Most diseased trees are found at elevations below 3,000 feet. However, it has also been observed at elevations as high as 7,000 feet. Fusarium, the primary cause of Koa wilt, May be found in a variety of environments but thrives with the high temperatures and moist soils of Hawaii. It survives in the soil. "F. oxysporum" is a soil-borne pathogen, and currently sanitation, controlling the initial inoculum, is the best means to control it. One should avoid bringing infected soil
Koa Kannon the Soto school. General Iwane Matsui who commanded the Shanghai Expeditionary Force at the outbreak of the Second Sino-Japanese War built the Koa Kannon statue after retiring from the service in 1940 to honor the officers and men of both China and Japan who fell in battle in the name of consecrating equally both friend and enemy. The statue was made using clay from battlefields, including from the vicinity of Nanjing where Matsui served. On 24 February 1940 the consecration ceremony was performed in the presence of Tessui Oshima, a high-ranking Jodo Buddhist monk from Zojo-ji, and other distinguished figures.