2,4-D is often used as a preplant burndown herbicide to help control horseweed and other broadleaf weeds before planting in no-till corn and soybean production. Isolated instances of poor horseweed ...

One morning last summer, University of California Cooperative Extension vineyard weed control adviser John Roncoroni displayed a horseweed plant that had grown to more than 10 feet tall in a Yolo ...

Glyphosate-resistant horseweed (or marestail or Conyza canadensis) has been confirmed throughout Delaware, Maryland and New Jersey. Horseweed is a winter annual weed. Emergence begins in the fall and ...

WESTMINSTER, Colorado – November 19, 2021 – Horseweed is one of the most common and most troublesome weeds in soybean production – shown to cause yield losses of up to 39 percent in the Midwest ...

Horseweed (marestail, Conyza canadensis L.) is a unique weed species that can emerge in both fall and spring. In Nebraska, unlike the eastern Corn Belt, horseweed populations predominantly emerge in ...

WEST LAFAYETTE, Ind. - A new Purdue University Web page offers farmers general information and educational materials on dealing with horseweed, a plant that is infesting parts of Indiana's cropland.