The unusually warm weather may create additional weed challenges this spring. Winter annuals in no-till fields will likely accumulate much more biomass prior to planting than normal and therefore use more soil moisture, tie up more nutrients and potentially interfere with planting and crop establishment. In addition, weeds such as horseweed (marestail) will grow more rapidly and reach growth stages that are difficult to control much sooner than in a “normal” spring.
Iowa State University
Hartzler, Robert G. and Owen, Micheal D. K., "'Early' Early-spring Weed Management" (2012). Integrated Crop Management News. 166.
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