 |
| CLICK HERE TO VIEW CURRENT ISSUE |
 |
| Best of NAMA 2026 |
|
 |
|
EXPERT: HPPD RESISTANCE LIMITING CORN POST-EMERGENCE OPTIONS
Jul. 11, 2025
BrownfieldAgNews reports:
A weed science professor at the University of Illinois says resistance to HPPD inhibitors is growing.
Aaron Hager tells Brownfield, "Eighty-five to 90% of the phone calls so far, during this part of the growing season, have been people saying, 'Look, we tried one of the Group 27's post. It didn't control the water hemp. What do we do now? '"
He says scientists haven't been able to identify the genes responsible for the resistance, so there's no easy answer.
"We really have to rely very, very heavily on many soil-applied pre-emergence herbicides to get the corn crop out of the ground without waterhemp emerging through it." He says, "Because once it comes out of the ground, our post options in corn have become very, very limited."
He also says there's no help coming anytime soon.
"In the post arena, there is absolutely nothing coming that's going to be new and novel in terms of a new site of action in terms of actual new chemistry that's going to be effective on this amaranth population," he says.
Hager says it's important farmers use herbicides with multiple modes of action, and not rely on one class of chemicals, to help prevent further resistance development.
|
|
|
|
|
