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Futures

Illinois Department of Agriculture Extends Dicamba Cutoff Date to July 15

06/13/2019
Illinois Department of Agriculture Extends Dicamba Cutoff Date to July 15
  • Illinois Department of Agriculture has extended the use of dicamba in dicamba-tolerant soybeans from June 30 to July 15.
  • This extended date increases the usefulness of the labeled dicamba products in this abnormal season, and judicious use and care should be taken to reduce off-target movement potential.*
  • The federal label has not changed - growth stages and planting date must be observed prior to applying dicamba.

The Illinois Department of Agriculture has extended the cutoff date for applications of dicamba in dicamba-tolerant soybeans from June 30 to July 15. This change use will take place once the department reviews and accepts the registrants’ Special Local Needs (SNL) product registration requests. This decision was due to the late planting season Illinois is experiencing and the importance of having an additional effective tool to manage tough to control weeds such as the Amaranthus species.

To reduce the potential for off target movement, applicators must be aware of temperature inversions, high wind speeds, high air temperatures, and low relative humidity, which can all occur in July. With an additional 15 days to apply dicamba, these weather conditions must be monitored very closely to mitigate the potential for off target movement. There are several best management practices to follow to aid in the successful application of this technology. These include proper nozzle selection, utilization of a drift reduction adjuvant (DRA), and intensified awareness of changing weather, to name a few. While the announcement only pertains to Illinois, we must be diligent across the entire Midwest to ensure proper stewardship of this technology.

While having an additional 15 days to apply dicamba, it is important to know that the federal label verbiage has not changed and still applies to all applications of dicamba. As soybean planting ranges from still in the bag, to early vegetative stages of growth, this implies that growth stages will be very different from field to field. For Engenia®, FeXapan™ and Xtendimax®, the label states that applications can be made prior to beginning bloom- R1- one open flower at any node on the main stem or within 45 days of soybean planting, whichever comes first. For the newest of the approved formulations, Tavium®, the label verbiage is slightly different. Tavium applications can be made to dicamba-tolerant soybeans through the V4 growth stage (4 fully expanded trifoliates) or 45 days after planting, whichever comes first. Once again, with soybean planting being delayed in parts of the territory, growth stages are going to vary from field-to-field, so it is very critical to scout the fields prior to dicamba applications the later we get into the season.

As the season continues and soybeans are planted, it is important to keep good planting date records and follow the best management practices when applying dicamba postemergence to dicamba-tolerant soybeans. It is an effective tool for weed management, but it must be stewarded to coexist with other technologies and specialty crops. If you have questions regarding application of dicamba, contact your local FS Crop Specialist. 

Select FS Adjuvants recommended for drift control, water drop management and water conditioning

* Before use, always read and following the herbicide and adjuvant labels.  

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