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 ...

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 ...

Marestail has quickly established itself as the number one problem weed in soybean production. Marestail (Conyza canadensis) is a native annual plant belonging to the aster family. A mature plant is ...

Drive by just about any soybean field in the community and you are likely to see marestail growing high above the canopy. In some fields, the marestail is overwhelming the beans, in others the plant ...

A native species that has become a major problem in Panhandle and Sandhills rangeland is Marestail or Horseweed, a native annual forb also known as Canadian horseweed and Canada fleabane.