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
Wahiawa Botanical Garden The property was transferred to Honolulu in 1950, and opened as a botanical garden in 1957. It is open seven days a week, from 9am to 4 pm. The Garden's collections include: Blue Ginger ("Dichorisandra thyrsiflora"), Hāpuu ii ("Cibotium chamissoi"), Koa ("Acacia koa"), Blue Jacaranda ("Jacaranda mimosifolia"), "Nageia nagi", "Angiopteris evecta", Shaving Brush Tree ("Pseudobombax ellipticum"), Autograph Tree ("Clusia rosea"), Nutmeg ("Myristica fragrans"), Allspice ("Pimenta dioica"), Travellers' Palm ("Ravenala madagascariensis"), "Chrysophyllum oliviforme", Common Screwpine ("Pandanus utilis"), "Parkia javanica", Guanacaste ("Enterolobium cyclocarpum"), Candle Tree ("Parmentiera cereifera"), Elephant Apple ("Dillenia indica"), Moreton Bay Fig ("Ficus macrophylla"), Queensland Kauri ("Agathis robusta"), "Brownea macrophylla",