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- Control Working GroupMany invasive species are already present in Hawaii and, despite our best prevention efforts, more will continue to arrive. Control of these species is necessary to mitigate or eliminate impacts to Hawaii’s environment and economy, and to the health and lifestyle of Hawaii’s people. Where possible, eradication is a preferred management option over continual control. […]
- Barbados GooseberryBarbados gooseberry (Pereskia aculeata) Hawai‘i-Pacific Weed Risk Assessment Score: 13 High Risk. Regulatory Status: None Prevention and Control Category: KISC Target Species. MoMISC Target Species. BIISC Target Species. Report this species Description Barbados gooseberry is a Woody shrub when young, but grows into climbing, leafy cactus, with branches are up to 11m (33 ft) long. […]
- Cat’s ClawCat’s claw, popoki, puakelekino (Caesalpinia decapetala) (Fabaceae) Description: Sprawling, climbing bramble or shrub with thorns on stems and leaves Yellow flowers in clusters, brown pods, with 4-9 black seeds Native to tropical Asia, introduced to Hawaii for use as a natural fence. First collected on Oahu in 1910, transported to Maui on construction equipment from […]
- Fire TreeFire tree, firetree, faya bush (Morella faya) Hawaii Pacific Weed Risk Assessment: 17 High Risk Regulatory Status: Hawaii Noxious Weed List (HAR 68) Prevention and Control Category: None Description: Evergreen shrub or small tree up to 8 m tall (26 ft) Fruit are pink to red or blackish when mature, and appear bumpy Native to the […]
- Glory Bush Glory bush (Tibouchina urvilleana) Hawaii Pacific Weed Risk Assessment: 10 High Risk Regulatory Status: Hawaii Noxious Weed List (HAR 68) Prevention and Control Category: OISC Target Species Report this species if seen on Oahu Description Tibouchina species usually have fuzzy leaves with prominent veins and showy purple flowers. Tibouchina plants have been grown as ornamentals. […]
- Gorilla Ogo Gorilla ogo (Gracilaria salicornia) Hawaii Pacific Weed Risk Assessment: None Regulatory Status: None Prevention and Control Category: None Description Brittle seaweed with cylindrical branches 2-5 mm in diameter. Gorilla ogo grows on the reef where it forms thick intertwining mats up to 15 cm thick Yellowish if growing in sunny spots, dark green or brownish when […]
- GorseGorse (Ulex europaeus) Hawaii Pacific Weed Risk Assessment: 20 High Risk Regulatory Status: Hawaii Noxious Weed List (HA 68) Prevention and Control Category: None Description Thorny shrub, up to 2 meters (6 ft) tall, with inch-long spines Bright yellow flowers that smell faintly of coconut Native to Western Europe, introduced as food plant for sheep and as […]
- Himalayan BlackberryHimalayan blackberry (Rubus ulmifolius, syn: R. discolor) Hawaii Pacific Weed Risk Assessment: 24 High Risk Regulatory Status: None Prevention and Control Category: OISC Target Species Report this species if seen on Oahu 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 […]
- Long-thorn KiaweLong-thorn kiawe (Prosopis juliflora) Hawai‘i-Pacific Weed Risk Assessment Score: 19, High Risk. Regulatory Status: Hawaii Noxious Weed (HAR 68) Prevention and Control Category: KISC Target Species Report if spotted on Kauaʻi Description Long-thorn kiawe can grow as a rambling shrub or tree ranging from 6′ to 30′ tall. The thorns are up […]
- Nettle CaterpillarNettle caterpillar (Darna pallivitta) Regulatory Status: Pest for Control (HAR 69A) Prevention and Control Category: The Hawaiʻi Department of Agriculture and U.S. Department of Agriculture introduced a biocontrol agent to control nettle caterpillar in 2010. The biocontrol agent, a wasp introduced from Taiwan, is a natural enemy of the caterpillar and has helped to manage […]