Check fields regularly to monitor crop and weed development. Take note of weed species. This may happen if weed seeds were carried into the field by floodwater. Make a field map of these weed locations and use it to plan next year's weed management program. Consider whether herbicides can be safely applied.
Most labels clearly specify the maximum growth stage of the crop at which the product can be used.
Most labels also caution against using herbicides if the crop is under any stress. Thus, the feasibility of herbicide use the same year as a flood occurs is limited. If herbicide use is feasible but conditions are extremely wet, consider using a commercial sprayer equipped with flotational tires. If this is the case, try to prevent weeds from going to seed through the use of mowing, tillage or chemical application. As mentioned above, take note of any new weed species that are present.