There are control measures that can be taken to reduce the impact of Invasive species. If you identify that you have one of these species present, below is information on both the spread and control for most of the moderate and serious threat species in the watershed. For more information on these plant species go the USDA Plant Database.

Amur Honeysuckle typically shades out native shades out other native plants that need sunlight. Common control methods are cutting, pulling out the seedlings, herbicides, and prescribed burning.

Autumn Olive shades out native plants that need sunlight. It is difficult to control because it grows back after cutting, but can be prevented by planting native species in disturbed areas.

Bell’s Honeysuckle shades out native plants that need sunlight. They can be controlled by removing the plant and the entire root when it is found, as well as herbicide use and burning.

Border Privet outcompetes other native plant species, and shades out others. It can be controlled by pulling, cutting, mowing, or herbicide treatments.

Bull Thistle mainly colonizes in disturbed areas. It can be controlled by pulling, mowing, or herbicides.

Canada Thistle shades out native plants that need sunlight. This plant can be controlled by limiting grazing, controlled burning, cutting, or mowing.

Cheatgrass can be controlled by tilling the land that is affected or using herbicide.

Common Buckthorn colonizes wetlands and shades out native plants. This plant can be controlled by mowing, cutting, girdling, burning, excavation, burning, and “underplanting.”

Common Privet grows very close together, and tends to crowed out other plants. This plant can be controlled by pulling, digging, or herbicide treatment.

Common Reed outcompetes other plants as well as lowering biodiversity, because all colonies tend to be clones. This plant can be controlled by water management, cutting, burning, or herbicide treatment.

Dame’s Rocket shades out native plants. This plant can be controlled by pulling out the plant and the entire root.

Eurasian Water-milfoil grows fast and crowds out native plants, as well as changing the ecosystem of its shallow water habitat, limiting species diversity. This plant can be controlled by pulling, lowering the amount of nutrients in the water, or herbicide treatment.

European Barberry is a host for wheat rust and is prohibited form being sold in many states.

Fiveleaf akebia can grow to smother anything form ground vegetation to canopy trees, and can prevent the growth of native plants. This plant can be controlled by repeated cutting, digging, or herbicide treatment.

Garlic Mustard outcompetes native plants for light, soil, and space. This plant can be controlled by pulling out the entire root system and cutting before the fruit is produced.

Glossy Buckthorn colonizes wetlands and shades out native plants. This plant can be controlled by mowing, cutting, girdling, burning, excavation, burning, and “underplanting.”

Goutweed crowds out native vegetation. This plant can be controlled by herbicide treatment.

Japanese Barberry crowds out native understory plants. This plant can be controlled by pulling, moving, or herbicide treatments.

Japanese Honeysuckle shades out native vegetation. This plant can be controlled by pulling and repeated pulling may be required, or herbicide treatments.

Japanese Knotweed outcompetes native plants. This plant can be controlled by pulling or herbicide treatments.

Japanese Stilt Grass outcompetes other shade dwelling plants. This plants establishment can be controlled by planting native vegetation in disturbed areas. If it occurs it must be pulled, before seed production, every year for seven years.

Jimsonweed is found in pastures, barnyards, and farmlands. This plant can be controlled by herbicide treatments.

Johnson Grass crowds native vegetation, slows succession, and reduces plant diversity. This plant can be controlled by pulling seedlings, or herbicide treatment.

Lesser Celandine outcompetes native vegetation. This plant can be controlled by digging, or herbicide treatment.

Morrow’s Honeysuckle shades out native vegetation. This plant can be controlled by pulling, digging, or burning.

Multiflora Rose outcompetes native vegetation, and drains nutrients out of the soil. This plant can be controlled by herbicide treatments.

Musk Thistle has the competitive advantage in grazed lands because it is not eaten by livestock. This plant can be controlled by pulling or herbicide treatments.

Oriental Bittersweet outcompetes native vegetation. This plant can be controlled by pulling, cutting, or herbicide treatment.

Purple Loostrife outcompetes native vegetation. This plant can be controlled by pulling, increasing water depth, or herbicide treatment.

Reed Canary Grass invades wetlands and outcompetes native wetland vegetation. This plant can be controlled by pulling, digging, burning, or herbicide treatment.

Russian Olive outcompetes native vegetation and hinders succession. This plant can be controlled by mowing.

Shattercane colonizes disturbed areas. This plant can be controlled by deep plowing, and crop rotation.

Siberian Elm colonizes and dominates disturbed areas. This plant can be controlled by girdling, cutting, pulling of seedlings, burning, and herbicide treatments.

Tartarian Honeysuckle outcompetes native vegetation. This plant can be controlled by pulling, or herbicide treatments.

Tree-of-Heaven outcompetes native vegetation. This plant can be controlled by removing the plant and all of the root system.

Wild Parsnip is common in disturbed areas. This plant can be controlled by pulling, cutting, digging, mowing, or herbicide treatments.

Wineberry grows in dense thickets, and displaces native vegetation. This plant can be controlled by pulling, or herbicide treatments.

For information on herbicide use regulations please see the Pennsylvania Department of Agriculture webpage on Pesticide Certification and Licensing at http://www.agriculture.state.pa.us/plantindustry/cwp/view.asp?A=3&QUESTION_ID=121152