How do extreme precipitation events influence weed control efficacy? 

The Northeast is experiencing a 71% increase in extreme precipitation events, which can increase soil-applied herbicide leaching and runoff, thereby decreasing preemergent residual herbicide efficacy. Cover crop surface residues can suppress weeds, thus offering alternative weed control when residual herbicides fail. However, cover crop surface residues increase soil moisture, which may exacerbate the loss of residual herbicides in response to extreme rain events. Therefore, we are investigating how extreme precipitation affects weed management efficacy.