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 Invasive Weed Species to be Controlled


INVASIVE WEED SPECIES WHICH MERIT MANAGEMENT CONSIDERATION: New exotic weed pests are continually being discovered encroaching into the State of Iowa. Many of these weed species can be controlled early in the discovery phase, and before infestation. The IRVM Program and the County Weed Commissioner, while focusing on noxious weeds, also evaluates the spread and the environmental impacts of new weeds on Johnson County. If a weed species is considered to have a significant detrimental impact on the resources of Johnson County, the Weed Commissioner can seek to have that species declared noxious by the Board of Supervisors. That weed species can then be included as part of the overall weed management plan.

This is a list of plant species which are considered invasive or aggressive by the Johnson County IRVM Program and County Weed Commissioner. These species are unsuitable for use or growth in roadside plant communities. Because of concern for their spread into public right of ways, planting these species in adjacent private lands is discouraged. This plant species list is not all-inclusive, and may be edited to include or remove certain species as conditions or situations dictate.

Autumn Olive (Elaeagnus umbellata)Abobe Icon
Black Locust (Robina pseudoacacia)Abobe Icon
Bush Honeysuckle (Lonicera spp)Abobe Icon
Canada Thistle (Cirsium arvense)Abobe Icon
Chinese Bush Clover (Sericea lespedeza)Abobe Icon
Common and Glossy Buckthorn (Rhamnus cathartica & Rhamnus frangula)Abobe Icon
Common Reed Grass (Phragmites australis)Abobe Icon
Common Teasel (Dipsacus fullonum)Abobe Icon
Crown Vetch (Coronilla Varia)Abobe Icon
Garlic Mustard (Alliaria petiolata)Abobe Icon
Japanese Barberry (Berberis thunbergii)Abobe Icon
Japanese Knotweed (Polygonum cuspidatum)Abobe Icon
Leafy Spurge (Euphorbia esula)Abobe Icon
Mulitflora Rose (Rosa multiflor)Abobe Icon
Oriental Bittersweet (Celastrus orbiculatus)Abobe Icon
Purple Loosestrife (Lythrum salicaria)Abobe Icon
Reed Canary Grass (Phalaris arundinacea)Abobe Icon
Smooth Brome (Bromus inermis)Abobe Icon
Plumeless and Musk Thistle (Carduus acanthoides, Carduus nutans)Abobe Icon
Tree of Heaven (Ailanthus altissima)Abobe Icon
Wild Parsnip (Pastinaca sativa)Abobe Icon
Yellow and White Sweet Clover (Melilotus officinalis and Melilotus alba)Abobe Icon