Dicamba survey results in, additional restrictions planned

BISMARCK – The North Dakota Department of Agriculture (NDDA) has compiled the results of a survey seeking information on plant injury that may have been caused by use of newly registered formulations of the herbicide Dicamba.

There were 215 survey responses, with 207 indicating damage.

“The injuries and damage reported are consistent with herbicide damage – leaf cupping, leaf curl and crinkled leaves,” Agriculture Commissioner Doug Goehring said. “But of the 207 responses indicating damage, 184 had no plant tissue analysis to verify the damage was caused by Dicamba.”

Dicamba is a selective herbicide used to control broadleaf weeds and woody plants. It has many applications, including lawn care, crop production and range management. Historically, it has been used in pre-plant applications on soybeans. Recently, new formulations have been approved for post-emergence use on Dicamba-tolerant soybeans.

“On Friday, the Environmental Protection Agency released their new label language classifying the new formulations as restricted-use products. We are currently drafting North Dakota-specific restrictions for Dicamba to mitigate potential damage to non-target crops in 2018,” Goehring said. “The proposed changes should be finalized by early November.”

The restrictions will only affect applications made on soybeans for XtendiMax by Monsanto; Engenia by BASF; and FeXapan by DuPont. The restrictions will not affect generic Dicamba formulations for use in small grains and corn.

Full survey results are available here.