Field Guide     Weed Management     Common Ragweed

Common Ragweed (Ambrosia Trifida L.)

Crop Impacts: Soybeans, corn, other yield crops

Common Ragweed 1

About Common Ragweed:

Common ragweed is an annual summer plant that generally can grow to be up to 3 feet tall. The stem of this weed is a greenish colour with hints of pink, and has a sticky texture. This weed has many leaves, the range in size; they can be 4 to 6 inches. Common ragweed flowers are first green and eventually change to a yellow. This weed grows in many different locations, and can survive in many different soils.

Family: Composite or Aster Family

Common Ragweed 2 Common Ragweed 3

Common Ragweed Scouting and Prevention:

In order to prevent Common Ragweed early, early season tillage will help. Mowing can also reduce the chances of this weed getting into your crops as well as into your fields all together. Using a pre-season herbicide can also help avoid the growth of this weed in various locations.

Common Ragweed Control:

When dealing with Common Ragweed, it is important to remove the weeds before they seed, to eliminate future problems. There are many herbicides available that can help control common ragweed.

Latin / Alternative Common Ragweed Names:

  • - Ambrosia Trifida L
  • - Great Ragweed
  • - Kinghead
  • - Tall Ragweed

Additional Ragweed Resources:

http://www.omafra.gov.on.ca/english/crops/facts/ontweeds/common_ragweed.htm Ontario Government: Ag

http://www.weedwreckingcrew.com/ Dupont Weed Wrecking Crew

http://www.precisionpac.com/ Dupont Precision Pac

http://www.illinoiswildflowers.info/weeds/plants/cm_ragweed.htm Illinois wild flowers information

http://www.extension.purdue.edu/extmedia/BP/GWC-14.pdf The Glyphosate, weeds and crops series