Managing annual ryegrass is not rocket science…but it is all about science. Therefore, being precise about the process of killing the cover crop is important.
In prior posts, you’ve learned about the timing, the weather, the proper mix of glyphosate, adding AMS and balancing the water hardness with citric acid if needed. Some add a surfactant and even 2,4-D for better control and to get rid of other broadleaf weeds at the same time.
By now, you may have seen already whether one full-rate application of glyphosate was enough. Inspecting the field a week after the first application is smart. Look closely. Any sign of green warrants another application.
After your corn or soybean crop emerges, you can control any annual ryegrass escapes with a labeled rate of Accent Q, Steadfast Q, or Option, but best control is obtained with these products when temperatures are above 70 degrees.