Pre-Harvest Applications in Wheat
Staging wheat for pre-harvest weed control can be tricky, especially in years when the crop is uneven due to poor conditions. Pre-harvest staging is critical to avoid any herbicide residues in the grain, which can lead to Maximum Residue Limit (MRL) and marketability issues. A wheat plant is considered physiologically mature at 30% moisture; this means grain fill has stopped and final yield and kernel weight/size has been determined. Spraying pre-harvest products such as glyphosate, prior to 30% grain moisture can negatively impact grain quality and marketability.