keyshunter

I agree with much of what was said above. But, for many years (per Penn State recommendation), in corn that was short enough to get the booms over, we used atrazine plus crop oil to control grasses that had escaped our pre-emergence sprays. We never saw damage to the corn. One caveat is to plant corn and not oats or any other atrazine sensitive crop in that field the following year, since there is a likelihood of damage from the residual atrazine.