EPA’s February 2024 ruling vacating labels for over-the-top applications of dicamba products including XtendiMax, Engenia and Tavium has motivated some companies to pull OTT dicamba varieties in soybeans.  

In Mississippi, top selling Corteva's Pioneer line variety P44A21X will not be an option for farmers in 2025. In its place, Pioneer is favoring an Enlist platform. Mississippi field agronomist Gus Eifling said there are a few options for farmers looking to replace their usual soybean choice.  

“We have a couple of different options: P42A84E is an Enlist 4.2 that will work as a replacement,” Eifling said. “The P43Z44SE, that is also a replacement. And the P45A81E replacement also goes on the same areas that the P44A21X went on.” 

Eifling said some of the updated Enlist variety swaps come with additional benefits for the growing season over the unavailable 44A21X variety.  

“One difference is the P43Z44SE is a root knot nematode bean as well,” Eifling said. “So it will go on root knot or non-root knot ground and it gives you a broader spectrum of acres that it can go on.” 

Another popular variety, P47A64X, finds its replacement in an Enlist conversion P48A14E. Eifling said acres can easily convert from one version to the next, with the exception of a few soil types.  

Related:Can the Delta double crop? Maybe.

“We can go across a broad spectrum of acres with those varieties,” Eifling said. “The only watch out is zero grade buckshot that's poorly drained, or what I would consider blow sand or beach sand. There are other options available for that.” 

New variety P45Z75E is showing promise as one of the highest yielding soybeans in Corteva’s Enlist lineup for Mississippi, according to Eifling. With limited supplies of the variety this year, agronomists are suggesting use in only top-producing soils.  

“It's one of the highest yielding soybeans in our lineup and goes across a lot of acres for the first year,” Eifling said. “Because it's limited supply, we're going to try to keep it off tougher dirt and put it on the better yielding areas. We also want to keep it off lodge-prone soils for the time being, until we determine standability.” 

For farms in the eastern portion of the state, unique soil challenges were addressed in an Extend packaged variety and finding an alternative will be critical.  

“In East Mississippi, we have iron chlorosis, or iron deficiency chlorosis. There are a lot of tough acres to grow on around here,” Eifling said. “By pulling the P53A67X we probably pulled the standard for this area for iron chlorosis, which is about 25,000 bags.” 

Replacement variety P56A71E has undergone testing in variety trials the last two years, and according to Eifling, handles iron chlorosis with nearly matched coverage and succeeds in similar soil types.