As a result of the widespread drought conditions experienced this past year, growers may have concern with the potential for herbicide carryover injury to this year’s crops.
DuPont Pioneer notes the potential for herbicide carryover injury is driven by the concentration of available herbicide remaining in the soil at the time of rotational crop planting and the susceptibility of the rotational crop to the herbicide. Some crops aren’t injured by relatively high concentrations, while others are highly injured by low concentrations. The stresses the newly planted crop faces during establishment can also affect response. DuPont Pioneer notes emerging plants are more likely to show injury to residual levels of herbicide if other stresses like compaction or cold, wet soils are also present. Unfortunately, there isn’t much growers can do at this point to affect the amount of residual herbicide present in their fields.
DuPont Pioneer says there are, however, a few things growers can do to reduce the risk of crop injury. DuPont Pioneer suggests reviewing spray records for each field and product labels to see what restrictions are indicated, ensuring seedling stresses are minimized, changing the planted crop, delaying planting, considering tillage and conducting a bioassay or chemical analysis.