Snow-on-the-Mountain (<em>Euphorbia marginata</em>) is one of the most poisonous weed species encountered in Missouri pastures. Currently, herbicide-resistant waterhemp fields like this are one of the most problematic weeds in the state. Spiny amaranth (<em>Amaranthus spinosus</em>) infesting a pasture in northwest Missouri. Maypop passionflower (<em>Passiflora incarnata</em>) is an increasing problem weed in a number of Missouri pastures.

weed science

Fun Facts


Ancient Egyptians wrapped their dead in the leaves of the giant reed (Arundo donax), now one of the worst riparian weeds in the U.S.


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: