Photo credit: Iowa State University

Iowa State University Extension weed scientist Bob Hartzler says dicamba injury this summer is the most extensive he’s ever seen.

Hartzler says reports from
agronomists across the state indicate nearly all
non-dicamba-tolerant soybeans are showing symptoms characteristic of
dicamba.

“And it’s from fence-row to
fence-row in those fields,” Hartzler says. “So you can’t see where the source
came from as the injury dissipates as you move across the field—and that’s the
type of injury we’ve never seen before.”

Hartzler thinks several
factors contributed to the increase in dicamba damage, including confusion over
the Ninth Circuit court decision, this summer’s environmental conditions, and
increased dicamba use on corn.

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