Invasive

Illustration of Acer platanoides (Norway Maple)

Illustration of Alliaria petiolata (Garlic Mustard)

This nematode worm is a parasite, originally from Southeast Asia. With the American eel population already declining, the introduction of this nematode may have a large negative impact on the survival of this species

Illustration of Anthonomus grandis (Boll Weevil)

Pickleweed is an invasive or introduced plant in Hawaii. It has succulent, brilliant green leaves and is common in salt marshes and tidal shorelines. It grows slowly in soils with high salt concentrations and areas with seawater overwash where it suffers little competition from other plants. The species manages salts by sequestering them in cell vacuoles and eventually shedding the leaves

Illustration of Berberis thunbergii (Japanese Barberry)

Illustration of Bidens spp. (Bur-marigold)

Illustration of Casuarina spp. (Casuarina)

Illustration of Centaurea solstitialis (Yellow Starthistle)

Illustration of Centaurea spp. (Knapweed)

Side view illustration of an adult Blue-spotted Grouper. The blue-spotted grouper was introduced to the Hawaiian islands from Moorea, French Polynesia in the late 1950s in an attempt to establish a grouper fishery in Hawaii

Illustration of Cirsium arvense (Creeping Thistle)

Illustration of Dactylis glomerata (Orchard Grass)

Illustration of Dreissena polymorpha (Zebra Mussel)

Illustration of Elaegnus angustifolia (Russian Olive)

Illustration of Elaegnus angustifolia (Russian Olive) leaves

Illustration of Elodea canadensis (Canadian Waterweed)

Illustration of Euphorbia esula (Leafy Spurge)

Illustration of crew member performing exotic plant management

Illustration of Hedera helix (English Ivy)

Illustration of Hedera helix (English Ivy) flower

Illustration of Hedera helix (English Ivy) fruit

Illustration of Hedera helix (English Ivy) leaf

Illustration of Helix aspersa (Garden Snail)

Native to India, introduced to Hawaii Island in 1883 (via Jamaica, where it was also introduced), then introduced to Maui, Molokai, and Oahu; none were introduced on the island of Kauai. Mongoose were imported by the sugar industry to control rats in cane fields. This infamous mistake was made without much knowledge about mongoose. Mongoose, which are active during the day, did not control the rats because the rats are primarily active at night

Illustration of Hydrilla verticillata (Waterthyme)

Illustration of Hydrilla verticillata (Waterthyme) 2

Hymenachne was introduced into northern Queensland, Australia in the 1970s to use in ponded pastures. It escaped cultivation a few years after its release in 1988. It is spreading throughout the tropical wetlands of northern Australia and is most common in the coastal wetlands of northern Queensland and the Northern Territory

Illustration of introduced species

Illustration of introduced species

Illustration of introduced species management

Front view illustration of a West Indian Lantana. It is a weed of cultivated land, fence lines, pastures, rangelands, and waste places. It thrives in dry and wet regions and often grows in valleys, mountain slopes, and coastal areas. It is somewhat shade-tolerant and, therefore, can become the dominant understory in open forests or in tropical tree crops. In pastures it forms dense thickets which shade out and encroach upon desirable pasture plants. With time it can form pure stands over large areas, the

Known as Koa haole (foreign koa) in Hawaii, or leucaena, is abundant as a weed in dry lowlands of Hawaii, often forming dense thickets in lowlands and lower mountain slopes of 2500 ft (762 m) altitude

Illustration of Lymantria dispar (Gypsy Moth)

Illustration of Lymantria dispar (Gypsy Moth) caterpillar

Illustration of Lythrum salicaria (Purple Loosestrife)

Illustration of Miconia calvescens (Bush Currant)

Illustration of Microstegium vimineum (Japanese Stilt Grass)

Illustration of Japanese stiltgrass

Illustration of Miscanthus sinensis (Chinese Silvergrass)