An average waterhemp produces approximately 300,000 seed/plant. Note the size of waterhemp seed compared to a single corn kernel. Maypop passionflower (<em>Passiflora incarnata</em>) is an increasing problem weed in a number of Missouri pastures. MU Weed Scientists utilize GPS tracking collars to determine the effects of weed infestation on cattle grazing distribution. Currently, herbicide-resistant waterhemp fields like this are one of the most problematic weeds in the state.

weed science

Fun Facts

After a walk, Swiss engineer George de Mestral observed burs from common burdock (Arctium minus) stuck to his wool pants and his dog’s fur. A few years later he patented Velcro, an invention inspired by the weed.


Welcome to the University of Missouri's Weed Science homepage. Here you can find information related to our extension, research, and teaching programs or visit some of our web resources like the Missouri Weed Identification or Herbicide Injury Guides. In our "Research Results" section, you can search results from our field research by year, herbicide, weed, or crop. Additionally, you can click on our publication section to see all of the publications and newsletter articles we provide as well as to view and/or listen to some of our power point presentations. We welcome your comments and/or suggestions about this site.

Click here for dicamba-related research results and presentations.

Download our new Weed ID App at the Apple App or Google Play Stores for I-phones, I-pads, and Android devices: