Documenting emergence patterns at our Crop Tour plot in Galva, Illinois
Anything that emerges after 36 hours of the first plant emergence is considered a weed and will not be able to catch up to the neighbors and therefore will rob plants of valuable inputs.

- White Flags – 0-12 hours
- Red Flags – 12-24 hours
- Blue Flags – 24-36 hours
Anything that emerges after 36 hours of the first plant emergence is considered a weed and will not be able to catch up to the neighbors and therefore will rob plants of valuable inputs.