Weed Control for No-Till Soybeans

Mark VanGessel, Extension Weed Specialist; mjv@udel.edu

It’s time to consider your options for no-till soybean burndown programs, and it is particularly important if you have glyphosate-resistant horseweed (marestail). Weed control for no-till soybeans has become more complicated as glyphosate-resistant horseweed has spread and species-shifts have occurred because of over-reliance on glyphosate for soybean weed control. A new fact sheet, “Approaches to Pre-Plant Weed Control in No-till Soybeans” is available at www.rec.udel.edu/weedscience/Fact%20Sheets_web/NT_soybeans_08_WF19.pdf. This fact sheet discusses the need for a combination of non-selective herbicide plus a plant growth regulator (2,4-D or dicamba) plus a residual herbicide for consistent weed control. In addition, the disadvantages of waiting until late spring to spray no-till herbicides are discussed.

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