Proper Glyphosate Staging Helps Growers Maintain Grain Quality
As harvest season approaches, growers are being reminded that proper timing is essential when applying pre-harvest glyphosate for weed control. Following recommended staging guidelines can help protect crop quality, reduce residue concerns, and support continued access to domestic and international markets.
Pre-harvest glyphosate is used to manage weeds before harvesting. However, applying it too early can result in unacceptable residue levels in harvested grains. These residues may affect crop marketability and create challenges for growers selling into sensitive markets.
One of the most important factors is grain moisture content. Experts recommend applying glyphosate only when grain moisture levels are below 30% in the least mature area of the field. This includes sections with regrowth that may still produce seeds. Applying the product before this stage increases the risk of residue issues.
Glyphosate is registered for pre-harvest weed control where permitted, but it should not be used as a desiccant. Growers are encouraged to carefully follow all product label instructions, including application rates, timing requirements, and pre-harvest intervals. Harvesting crops earlier than advised can further increase the likelihood of unwanted residues in grain.
“Glyphosate is an important tool in the grower's toolbox for crop management, and when it comes to pre-harvest glyphosate, timing is everything. By waiting until grain moisture in the least mature part of the field is below 30 per cent, growers can ensure their crop meets market standards and help keep markets open for all,” said Krista Zuzak, Director, Crop Protection and Production at Cereals Canada.
When glyphosate is used in combination with other products, growers should follow the most restrictive label requirements. Proper planning and careful application decisions can help ensure crops meet market standards and buyer expectations.
Strong on-farm management practices play an important role in maintaining the reputation of agricultural products. By following recommended staging guidelines, growers can improve crop quality, support food supply chain confidence, and help keep valuable markets open.
Agronomists, retailers, and producers should regularly review application recommendations and confirm any market-specific requirements with grain buyers before making management decisions. Careful attention to timing and label directions can contribute to successful harvests and stronger market opportunities.
Photo Credit: Cereals Canada logo