Division of Plant Sciences

University of Missouri

Events  |  Contact Us  |  Weather: 80.0°F / 26.7°C
Spiny amaranth (<em>Amaranthus spinosus</em>) infesting a pasture in northwest Missouri. Graduate student Jaime Farmer presents results from his tillage research at the 2014 Mizzou IPM Field Day. An average waterhemp produces approximately 300,000 seed/plant. Note the size of waterhemp seed compared to a single corn kernel. Eric Riley, former MU Weed Science Research Specialist, discusses the results of his research on the management of giant ragweed.

weed science

Fun Facts

Tiny seeds from horseweed (Conyza canadensis) have been known to travel 300 miles by air. Specially equipped model airplanes have tracked horseweed seed in the earth’s planetary boundary layer.


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.

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