Soybean growers continue to battle herbicide resistant weeds that continue to affect yield while simultaneously new resistant biotypes continue to evolve due to limited post-emergent herbicide options. Misapplication and overuse of post-emergent herbicides has led to selection pressure in giant ragweed populations. Soil applied residuals are effective as the herbicide is absorbed into the weed at the most vulnerable stage of growth, emergence. Can soil applied residual herbicide programs can be cost effective while providing effective giant ragweed control?

Objectives are to evaluate combinations of soil residual herbicides, target economical treatments that compete with current recommended...