Better Weed Management
Through Ecological
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Rhamnus cathartica (common buckthorn) and R. frangula (glossy buckthorn also known as Frangula alnus) are non-native shrubs that can form dense thickets that crowd out native plant species and threaten ecosystem integrity.  R. cathartica invades floodplain and riparian forests, open oak woods, prairies, open fields and edge habitat such as fencerows.  R. frangula invades wetland habitats and can occur in edge habitat, old fields and prairies.   

Recently, both species have been identified as primary overwinter hosts for the soybean aphid (Aphis glycines) an invasive pest of soybeans in the Midwest. 

We are working as part of a multidisciplinary team to determine the relationship between Rhamnus populations and soybean aphids. Our lab has the primary responsibility for determining the biology and ecology of these weedy invasive species.

Determining the geographical distribution of Rhamnus species is a major component of our research.  On this site we have a map (see maps) of Rhamnus spp. in the North Central region but there are large areas for which we have no information.  Interested in helping?  Please fill out the questionnaire or contact us directly at the phone number or email address at the bottom of this page.  The information will be used to update our state and regional maps.