Invasive plant species By: Grace Kenyon & Maddie Woodfield

Giant Hogweed One of the most dangerous invasive species in New York due to its ability to cause permanent scarring through painful burns caused by its sap. Can grow up to 20 ft tall Originally came from Asia It was brought from Asia for decoration and became an invasive species Will kill off other native plants by blocking sunlight Notify the DEC before tackling it yourself, spray with herbicide, or cut down carefully do not burn.

Honeysuckle There are native and invasive species of honeysuckle present in NY. These plants grow densely and will suppress and out-compete other native species. The invasive species are also can harm migrating animals that eat the berries. Hand removal, burning it in an open space, and herbicides Some invasive honey suckle came from Asia The purpose of bringing invasive honeysuckle plants to America was for decoration purposes

Purple Loostrife Purple loosestrife is rapidly displacing native species such as cat tails The root system can also raise the water and reduce water flow Can be pulled by hand, and species of beetles have been released to help control Europe and Asia Brought in when seeds were in soil used as ballast in European sailing ships and discarded in North America Can take over swamp areas easily

Garlic Mustard Europe and parts of Asia Introduced for medical use and food Garlic mustard is dangerous to forests because it is able to dominate understories Can release a chemical that damages relationships between native grasses and fungi Hand pulling, and herbicides Can kill native grasses and fungi Form dens strands that choke out native plants

Kudzu Invasive vine from Japan The plant was introduced as a centennial exposition in Philadelphia and New Orleans in 1883 The Kedzu increased the amount of nitrogen in soil so it decreased the soil productivity Kills off native plants that cant have a high concentration od nitrogen in it soil Apply herbicide when vines are actively growing

Japanese Knotweed and bamboo’s Originally from Japan Was introduced as a decorative garden plant Grows rapidly hard to get rid of and the lack of diversity in plants leads to soil being more likely become eroded Kills off native plants by cutting off their sunlight Spray the plant when the flowers bloom with a weed killer

Hemlock wooly Aldridge Native to East Asia Feeds off the snap of hemlock trees and this threatens the eastern hemlock tree It was accidently introduced to North America in 1924 Soil treatment is considered the best way to get rid of the invasive plant

Water chestnut Originates in Asia, China, Japan, India, ext. It was introduced in the Hudson river – Mohawk river drain basin. It was possibly intentional Water chestnuts kill most native water plants Reduced plant growth and reduced levels of dissolved oxygen (can lead to killing fish) Mechanical, hand pulling, harvesting, or chemical are all ways to get rid of the water chestnut.

Japanese Stilt grass Decreases biodiversity by killing native grasses, sedges, and herbs Also places where infested often have more invasive species Originates from Japan Introduced to North America in Tennessee most likely through packing material Mowing, Hand pulling, Limit soil disturbance

MugWort Its pollen is a reason hay fever is spread It is problematic in nurseries, field grown crops, and turf grass Spray with herbicides Europe and Eastern Asia Has medical uses and was introduced for that purpose and through a contaminant in a ship ballast

Wild Parsnip Like giant hogweed, wild parsnip sap contains chemicals that will cause a burn within 48 hours Europe and Asia Most likely brought by European settlers for its edible roots Burn the site where grown fallowed by applying herbicides to site

COMMON BUCKTHORN This plant degrades the wildlife habitat and threatens the future of forests, wetlands and prairies by killing off native plants for nutrients, light and moisture. It originates Europe Brought in the 1800 used as an ornamental plant Remove trees with fruit first to reduce the amount of seeds

JAPANESE BARBERRY Japanese barberry can threaten native species in a variety habitats ranging from closed canopy forests, to woodlands, wetlands, pastures, meadows and wasteland Mowing or cutting for small populations or areas where herbicides may not be used Native to Japan Was introduced as a decorative plant

MULTIFLORA ROSE The multiflora rose invades forest edges in dense thickets that exclude native species Seedlings can be hand pulled, larger plants can be dug out, frequent repeated cutting or mowing Native to Japan and Korea Asian people brought it with them to America and planted them

ORIENTAL BITTERSWEET Oriental bittersweet's vine can strip away the protective bark, of trees and other plants it climbs Additional weight can also cause branches to break. It can also shade out native species. Native to Japan and Korea Introduced in the 1860’s Vines can be pulled by hand, which should be done before fruiting herbicides on cut stems.

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