An average waterhemp produces approximately 300,000 seed/plant. Note the size of waterhemp seed compared to a single corn kernel. Former graduate student Nick Monnig makes a herbicide application to one of his research plots. Currently, herbicide-resistant waterhemp fields like this are one of the most problematic weeds in the state. Maypop passionflower (<em>Passiflora incarnata</em>) is an increasing problem weed in a number of Missouri pastures.

weed science

Fun Facts

Scientists have discovered that earthworms contribute to the spread of giant ragweed by systematically collecting and burying its seeds in their burrows.


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: