Division of Plant Sciences

University of Missouri

Events  |  Contact Us  |  Weather: 82.5°F / 28.1°C
Former graduate student Nick Monnig makes a herbicide application to one of his research plots. Eric Riley, former MU Weed Science Research Specialist, discusses the results of his research on the management of giant ragweed. An average waterhemp produces approximately 300,000 seed/plant. Note the size of waterhemp seed compared to a single corn kernel. Currently, herbicide-resistant waterhemp fields like this are one of the most problematic weeds in the state.

weed science

Fun Facts

Invasive weeds are spreading at a rate of about 4,600 acres per day on federal lands in the West.


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: