The EPA and registrants recently announced changes to the new dicamba labels in response to widespread off-target plant injury. The most significant change is classification of the new dicamba formulations as Restricted Use Products. Other changes will reduce the hours available to spray soybean, including: 1) restricting applications to between sunrise and sunset; and 2) reducing the maximum wind speed during application from 15 mph to 10 mph. The ability to cover all acres in a timely manner has always been an issue and these new limits will add to that difficulty.

An earlier article described hours available to apply herbicides using restrictions on the first Xtendimax with Vapor Grip Technology label. In updating the following linked article, box plots are used to display the distribution of available hours during two 7-day periods at different times in the growing season. Weather records for four different years were used, therefore providing 28 days in each analysis. Weather data from the ISU Research Farm near Boone was used.

Learn more about the label changes and their expected affects in this story.