Onion Grass in an Alfalfa Plot

[aa961jester]

I have 200 acres located in south central Kentucky. Last September I started an alfalfa plot that also has a strip of Whitetail Institute Fusion down the center. The Alfalfa is doing OK but I have oniongrass starting throughout the field. I did use gly twice on the field and a 3 point disc before planting. Does anyone know if Grassout (clethodim) will kill the oniongrass. If not do you know what will?

 

[Charles Clear]

I have onion grass in my yard, a lot of it actually. Mine pretty much disappears in the summer. I only see it in the spring. My yard smells like onion soup when I mow it in the spring lol. I was always told the bulb is the problem, why herbicides don't always work.