Digital Post

A soybean field in Jasper County, Iowa, in 2016
File: Amy Mayer / Harvest Public Media

Regulators in Arkansas have proposed to effectively ban farmers from using a controversial weedkiller produced by Monsanto that is thought to be destroying crops after drifting in the wind.

The Arkansas State Plant Board proposed a ban on using the herbicide dicamba on cotton and soybeans from April 16 to October 31, essentially the entire growing season. (PDF)

Genetically engineered cotton seeds delivered to Missouri farmers in 2015 featured a warning not to spray them with dicamba. The corresponding dicamba herbicide was not approved by regulators until 2017.
File: Kristofor Husted / Harvest Public Media

The herbicide dicamba is thought to have been the culprit in more than 3 million acres of damaged soybeans across the country, destroying plants and leaving farmers out millions of dollars in crops.

The chemical has been in use for decades, so why is it today apparently causing farms so much damage?