Elevated risk of herbicide carryover this spring

An agronomist says exceptionally dry winters can lead to higher cases of herbicide carryover in the spring. 

Jason Mefford, who’s based in west central Missouri with AgriGold, tells Brownfield…

“That’s a pretty big concern.”  He says, “Almost all herbicides that are degraded are done by moisture and temperature and biology. So not having that moisture there it can really cause an issue.” 

This winter was exceptionally dry in much of the Midwest, and Mefford says recent rains may not be enough to avoid issues.

“Some of that rain would help, but it’s not like a light switch.”  He says, “It’s not an on and off sort of deal.”

He says fields with lighter, sandier soils and low organic matter have a higher risk.

“You probably won’t see it across the entire field.”  He says, “It’ll be maybe some overlapped places like corners or field entrances. You may see it on hillsides or terraces.”

Mefford says if farmers have at-risk fields, they want to gauge the extent of any damage before deciding how to manage that crop moving forward. 

Prior to planting, farmers could also match their rotation to what was planted last year, or disc the field, diluting the layer of chemical with more soil.

AUDIO: Jason Mefford – agronomist with AgriGold

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