– Mark VanGessel, Extension Weed Specialist; mjv@udel.edu
The cool spring has meant winter grains have not progressed as quickly as normal and some fields may not have been sprayed yet. With the forecasted weather, grains will begin growing quickly and there might be a short window before the weeds are too tall or the crop canopy closes and prevents good spray coverage. If you are considering a postemergence spray, 1) be sure weeds are small, 2) the crop has not reached the maximum stage for application, and 3) the replant interval allows a late spray.
| Herbicide | Maximum Stage | Rotation to Soybeans | Rotation to Vegetables |
| Axial XL | Pre-boot | No restrictions | 30 days |
| Harmony Extra | Before flag leaf emergence | 7 days | 45 days |
| Huskie | Flag Leaf emergence | 120 days | 9 months |
| Quelex | Flag leaf emergence | 90 days | 15 months |
| Starane Ultra | Early boot stage | 120 days in MD 90 days in DE, VA |
4 months |
| Sentrallas | Before flag leaf emergence | 120 days 90 days in DE, MD, VA |
4 months |