Due to a variety of factors, both common lambsquarters and marestail (also called horseweed) are challenging soybean weeds. Both plants have high seed production, increasing resistance to common ...

WILLISTON, N.D. - Neighboring eastern Montana has its first verified case of glyphosate-resistant Conyza Canadensis, more commonly known as horseweed or marestail. While Williams County Extension ...

BOZEMAN, Mont. – Experts from the Montana State University Extension Service have identified glyphosate-resistant Conyza Canadensis, also known as marestail or horseweed, in northeast Montana. The ...

For the past three years marestail populations east of the Mississippi River have exhibited resistance to glyphosate, the active ingredient in many popular herbicides, including Roundup. In 2002 the ...

Glyphosate-resistant marestail has infested about 2.2 million acres in Nebraska. Marestail is difficult to control due to its emergence pattern. Marestail primarily emerges in the fall though some ...

A marestail weed regrows after glyphosate application. Marestail, or horseweed, has become increasingly problematic for Indiana and Ohio soybean growers because it is resistant to common herbicides.

URBANA — Widespread and often very dense populations of marestail (horseweed) in soybean fields last spring caught the attention of farmers and other weed management practitioners, with many coming to ...

The weather for the past couple of weeks has allowed producers to make post-emergence herbicide applications. An issue they may be facing now is the presence of herbicide-resistant weeds. A number of ...