Hawaii residents are urged to use the Pest Hotline to promptly report sightings of invasive pests such as snakes, unusually aggressive stinging ants, and illegal or unknown animals. Call 643-PEST (643-7378)
The Division of Forestry and Wildlife of the Hawaii Department of Land and Natural Resources has designated all non-native Rubus species as some of Hawaii's Most Invasive Horticultural Plants.
Description:
Spiny, woody bramble that grows as a sprawling bush, but may reach heights of 4 m (13 ft)
White to pinkish flowers that become shiny black fruit when ripe
Native to Western Europe, introduced as an ornamental and backyard food crop
Harm:
Found in disturbed areas, open fields and around fresh water habitats
Forms dense, impenetrable thickets that exclude other native plant species
Seeds are spread by fruit-eating birds and mammals, also spreads vegetatively
Thickets also make access difficult for hunters, hikers and other visitors to forest
Infestations can produce 7,000-13,000 seeds per square meter, which can remain dormant in the soil for several years
In Hawaii:
Kauai: None known.
Oahu: Known from only two areas on Oahu: Mauumae Trail and Palolo Valley in the southeastern corner of the island. OISC is working to eradicate these populations.
Maui: Present at Waikamoi and Kaulalewelewe, West Maui, near the beginning of the trail to Puu Kukui.
Molokai: None known.
Lanai: Presence/absence unknown
Kahoolawe: None known.
Big Island: Present, but not currently a BIISC target. Landowners are encouraged to control where possible.
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