Marestail can cause significant yield loss in both corn and soybeans. Learn to scout and identify this weed early. Horseweed (Marestail) (Conyza canadensis(L.) Cronq.) Winter/summer annual.

Context Explanation

Horseweed emerges in fall or early spring as a rosette. Fall-emerged horseweed becomes dormant over the winter, plants start to bolt in April/May, begin to flower in July, set and disperse seed from August to October and die. To effectively kill mares’ tail, it’s essential to choose the right weed killer. In this section, we’ll explore the different types of weed killers that can help eliminate mares’ tail and provide tips on how to use them effectively.

Insight Material

Looking to control marestail? It is one of the more challenging weeds to control prior to no-tilling soybeans. Aaron Hager, University of Illinois Extension weed specialist, said some farmers have reported poor marestail control following applications of glyphosate plus 2,4-D. Horseweed (marestail) competes with soybeans throughout the growing season and reduces crop yields. Learn how to manage it with this factsheet from the USB-sponsored group, Take Action (Herbicide-Resistance Management).

Final Conclusion

Marestail (Conyza canadensis), also known as horseweed or Canada fleabane, is a common winter or summer annual broadleaf weed found in nurseries, greenhouses, landscapes, roadways, meadows, turfgrass, and crops. Learn about marestail—how to identify, lifecycle, the damage it causes, known resistance and how to control using an integrated weed management. What’s the secret to preventing marestail regrowth in no-till fields? Talkin’ Weeds: Learn how to combine burndown and residuals for maximum effectiveness. Marestail Weed Identification: How and When to Scout Marestail can cause significant yield loss in both corn and soybeans. Learn to scout and identify this weed early.

Horseweed/marestail Conyza Canadensis (L.) Cronq. General description: Produces a basal rosette of hairy, irregularly toothed leaves 2-3 inches long. Stem reaches heights of 6 ft, terminal portion is a large panicle of inconspicuous flowers producing numerous wind-dispersed seed. Farm Progress: What’s the secret to preventing marestail regrowth in no-till fields?