Written collaboratively by: Paul O. Johnson, David Vos, Jill Alms, Leon J. Wrage, Adam J. Varenhorst, Philip Rozeboom, Patrick M. Wagner, Emmanuel Byamukama, Dalitso Yabwalo, and Connie Strunk
The South Dakota Pest Management guides are now available for free. The guides offer recommendations for controlling weeds, insects, and diseases in a variety of South Dakota crops.
Marestail (also known as horseweed) is considered either a winter annual or biennial species that is often difficult to identify at the rosette stage. In the Dakota’s, marestail will germinate in the fall and bolt in the spring.
Kochia is a problem in north central South Dakota row crops. New post-emergent options in corn and soybean have helped alleviate kochia competition from many fields, but these herbicide options shouldn’t be completely relied upon for a long-term control plan.
Fact sheet about symptoms, disease cycle, risk factors and management of Wheat streak mosaic disease