Invasive species in Hawaii and health-related problems. The introduction of mosquitoes to Hawaii has resulted in the spread of avian malaria, and increases the risk of dengue and west Nile virus (not known to be in Hawaii yet). Other native species can be affected by invasive species diseases as well, such as the once-dominant koa tree being killed by koa wilt, which is believed to have been brought into Hawaii on an ornamental acacia plant, and the 'ohi'a tree, now being affected by Rapid Ohia Death. Invasive predators can severely reduce the population sizes of native species, or even drive them extinct, because native
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",