Q.Pest & Weed Management
How do I control Palmer amaranth in soybeans?
A.
Palmer amaranth has developed resistance to glyphosate, ALS-inhibitors, and PPO-inhibitors in many regions. Use a multi-mode-of-action herbicide program (residual pre-emerge + post-emerge with multiple actives), narrow row spacing for canopy closure, cover crops for weed suppression, and timely cultivation. Rogue out escapes before they go to seed.
Variety review and cover crop pages cover related topics.