New Fact Sheets Added for Invasive Plants and Weeds

New Fact Sheets Added for Invasive Plants and Weeds

The Renz lab in the UW-Madison Agronomy Department in cooperation with University of Wisconsin-Extension Team Horticulture, Wisconsin Department of Natural Resources, and the Midwest Invasive Plant Network has continued the development of a series of fact sheets on invasive plants and urban weeds that was started in 2009. This series summarizes important identifying characteristics for each featured species, as well as information necessary for developing a management plan. The bulk of each sheet lays out non-chemical and chemical control methods. Information highlighted includes timing of treatment for each technique, effectiveness of treatments, and remarks and cautions particular to each technique. The products or techniques included are in common use or are known to provide effective control as documented by researchers and land managers. Those products and techniques that do not provide sufficient control or lack information for effectiveness on target species have been omitted. It is our hope that these sheets will provide everyone with the information needed to manage invasive species in their specific situation.

We are releasing 18 new sheets, representing 23 species. This brings the series to a total of 33 sheets and 44 species. You might have seen the original batch of species, but with this new release we have updated all of our sheets to include new herbicide products and a rating system that allows the user to compare the effectiveness of control techniques. The control information is given as a percentage of the original infestation that is controlled the year of the application and the year after the initial application with no subsequent application of control.

All of the sheets are available at the UW-Extension Weed Science web site ( or you can follow the links below directly to a species.

Original fact sheets:

black swallow-wort – Vincetoxicum nigrum

buckthorns – Rhamnus cathartica and Frangula alnus

bush honeysuckles – Lonicera spp.

Canada thistle – Cirsium arvense

creeping bellflower – Campanula rapunculoides

dame’s rocket – Hesperis matronalis

garlic mustard – Alliaria petiolata

hedge-parslys – Torilis spp.

hill mustard – Bunias orientalis

Japanese honeysuckle – Lonicera japonica

Japanese knotweed – Polygonum cuspidatum

poison-hemlock – Conium maculatum

spotted knapweed – Centaurea stoebe

teasels – Dipsacus spp.

wild parsnip – Pastinaca sativa

 New fact sheets:

Asian bittersweet – Celastrus orbiculatus

biennial thistles – bull Cirsium vulgare, European marsh Cirsium palustre, musk Carduus nutans, plumeless – Carduus acanthoides

bird’s-foot trefoil – Lotus corniculatus

black locust – Robinia pseudoacacia

common tansy – Tanacetum vulgare

crown-vetch – Securigera varia 

field bindweed – Convolvulus arvensis

Japanese hop – Humulus japonicas

Japanese stiltgrass – Microstegium vimineum

leafy spurge – Euphorbia esula

multiflora rose – Rosa multiflora

privet – Ligustrum spp.

purple loosestrife – Lythrum salicaria

quackgrass – Elymus repens

sericea lespedeza – Lespedeza cuneata

sweetclovers – Melilotus spp.

tree-of-heaven – Ailanthus altissima

wild chervil – Anthriscus sylvestris

This information can be accessed in the form of a searchable database (