Peanut Response to Flumioxazin and <i>S</i>-Metolachlor Under High Moisture Conditions

ABSTRACT Georgia produces nearly 51% of the United States peanut (Arachis hypogaea L.) crop. To combat and prevent weed infestations, herbicide programs containing flumioxazin S-metolachlor are often applied preemergence (PRE). Despite effectiveness for control, injury following heavy rainfall can be problematic. The objective this study was to evaluate impact from after simulated events on growth yield. Plots were planted at University Ponder Research Farm located near Ty Ty, using conventional tillage practices twin-row spacing. Treatments included PRE applications 0, 0.11 0.22 kg ai/ha alone or in combination with 1.07, 1.40, 2.80 a CO2-pressurized backpack sprayer. Irrigation ≥20 cm 30 days planting (DAP) simulate rainfalls. Flumioxazin caused greatest visual (&amp;gt;60%) most whole-plant fresh weight/m reductions 21 DAP compared other treatments. Peanut density not impacted by S-metolachlor. Neither nor affected J-rooting. Yield reduced any rate flumioxazin. However, kg/ha, (2.6X field rate), yields 8.9% plots where no recommended rates applied.