PubMed · 2026-06-19
Researchers found that applying the herbicide imazethapyr at moderate doses (250–500 mL per hectare) early in the faba bean growing season—from before planting through about 10 days after sowing—best controls weeds without harming the crop. Higher doses or late applications hurt the bean plants even while killing weeds.
Imazethapyr applied at 250–500 mL per hectare from pre-planting through 10 days after sowing maximized faba bean grain yield and canopy development.
Higher rates (≥750 mL/ha) or late post-emergence applications caused phytotoxic crop damage, reducing yield despite better weed suppression.
Response surface models achieved high predictive accuracy for leaf area index, 100-seed weight, and weed dry weight, validating RSM as a precision decision-support tool.
