As young crops continue to grow, growers should look out for horseweed (also known as marestail). This annual weed typically germinates in the fall or spring but also has the unique ability to do so year-round.
Purdue University says that crop rotation doesn’t affect horseweed, so knocking down this weed before its highly mobile seeds spread throughout the field offers the best chance of control.
Horseweed is often misidentified as whitlowgrass or a member of the fleabane species, so paying special attention to its characteristics is the key to an accurate diagnosis.
Identification
- Forms a rosette soon after emergence
- Can grow up to 6 feet tall
- Leaves decrease in size toward the top of the weed
At this point in the season, applying a post-emergence herbicide can help control horseweed and prevent future seed dispersal. With the increasing threat of herbicide resistance, the University of Nebraska-Lincoln reminds growers to consider choosing an herbicide containing multiple effective modes of action.
Acuron, Acuron Flexi, Halex GT and Flexstar GT 3.5 herbicides can help control horseweed and other tough weeds in corn, soybeans and other crops, while also helping manage resistance to herbicides in future seasons.
Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. Acuron is a restricted-use pesticide.
Source: Syngenta Know More Grow More