Invasive plants can thrive and aggressively spread beyond their natural range, disrupting ecosystems. The Management of Invasive Plants in Wisconsin series explains how to identify invasive plants and provides common management options.
To increase monarch populations, people are increasingly planting ornamental types of milkweed and encouraging common milkweed to grow wherever it occurs in uncultivated areas. While milkweed is beneficial to monarch populations, people need to be aware that it is toxic and can be lethal to animals, particularly horses and other equines.
Poison Ivy is a perennial woody plant that grows as either a low shrub or a climbing vine. Poison ivy is native to North America and is common in Wisconsin, growing in pastures, roadside ditches, fence rows, wooded forests, beaches and parks. Contact with poison ivy causes skin rashes, blisters and other allergic reactions. Learn identification and control in this factsheet.
Wild parsnip (Pastinaca sativa) is an aggressive Eurasian member of the carrot family that grows in sunny areas and tolerates dry to wet soil types. Very invasive, it can overtake roadsides and fields. Contact with this plant can cause severe skin blisters and permanent scarring. Learn how to identify and control this invasive plant in this factsheet.
Invasive phragmites, or common reed. is a tall, perennial grass that aggressively colonizes and forms dense stands in freshwater wetlands. Learn how to identify and control this invasive threat to Wisconsin’s wetlands in this factsheet.
Japanese Knotweed, which is native to Asia, has become an invasive plant in Wisconsin. This brochure describes the plant and gives recommendations for control.
Includes history, distribution, habitat, similar species, threats, identification and impact, of the shrub honeysuckles that are invasive in the Midwest. Photos and discussion of control strategies are also included.
Purple loosestrife (Lythrum salicaria) is a fast-spreading, tall Eurasian plant that grows primarily in wetlands and ditches, but can invade home gardens. This factsheet covers identification and control of this attractive, yet invasive, plant.
This detailed, illustrated guide will help you identify 54 of the most common problem weed species in the north central region of the United States. It is divided into two main sections: grass and grass-like weeds and broadleaf weeds.
Dame’s rocket is a Eurasian biennial belonging to the mustard family. It was introduced to North America in the 1600’s and has naturalized itself in moist, wooded areas, but can also invade open areas. Learn how to identify and control this invasive plant in this factsheet.