Offsite movement of pesticides by drift is an important consideration when making any pesticide application but can be an even greater concern when products are applied later in the growing season. There are several reasons for increased concern with later applications. One is that off-target movement of products from mid-season pesticide applications can affect non-target plants and other organisms more because they are actively growing. A common scenario illustrating this point is a postemergence-applied corn herbicide that drifts onto an emerged soybean crop versus a product that was soil-applied before soybeans were planted.
Iowa State University
Schaefer, Kristine J. P. and Pope, Richard O., "Drift issues, late application considerations, and soybean fungicides" (2005). Integrated Crop Management News. 1429.
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