Dicamba Registration Extended for 2 Years

soybean-row-503945927-Thinkstock-1The EPA announced Wednesday that they would extend the registration of dicamba for over-the-top use on cotton and soybeans. This extension is good through December 20, 2020. The EPA worked in collaboration with state regulators, farmers, academic researchers, pesticide manufacturers, and other stakeholders to arrive at this decision.

EPA Acting Administrator, Andrew Wheeler, followed this announcement with, “EPA understands that dicamba is a valuable pest control tool for America’s farmers, by extending the registration for another two years with important new label updates that place additional restrictions on the product, we are providing certainty to all stakeholders for the upcoming growing season.”

Dicamba registration decisions for 2019-2020 growing season

  • Two-year registration (until December 20, 2020)
  • Only certified applicators may apply dicamba over the top (those working under the supervision of a certified applicator may no longer make applications)
  • Prohibit over-the-top application of dicamba on soybeans 45 days after planting and cotton 60 days after planting
  • For cotton, limit the number of over-the-top applications from 4 to 2 (soybeans remain at 2 OTT applications)
  • Applications will be allowed only from 1 hour after sunrise to 2 hours before sunset
  • In counties where endangered species may exist, the downwind buffer will remain at 110 feet and there will be a new 57-foot bufferaround the other sides of the field (the 110-foot downwind buffer applies to all applications, not just in counties where endangered species may exist)
  • Clarify training period for 2019 and beyond, ensuring consistency across all three products
  • Enhanced tank clean out instructions for the entire system
  • Enhanced label to improve applicator awareness on the impact of low pH’s on the potential volatility of dicamba
  • Label clean up and consistency to improve compliance and enforceability

Jason Norsworthy, University of Arkansas weed scientist, weighed in on this issue in the Delta Farm Press. He seemed unsurprised by the news, but also cautioned readers to remember that these are not actual changes to the label, just modifications. He stated, “There’s nothing there that surprised me. I’ve been in correspondence with the agency over the past few months, and I know they have been poring over a wealth of data. I do think what they have put out takes things a step further than where we were at in 2017 and 2018.”



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