The grass generally germinates about two weeks after the corn goes in. I gathered that post-em Simazine would have little effect on germinated grass. Timing of application with follow up rains can be an issue, so early pre plant could be a good strategy Matt. Early post emergent atrazine with oil doesn't seem to work on this grass, although I am keen to try the cyanazine +oil post em.

Martin, as far as chickpeas go, they are grown over winter, so we sometimes see the grass late in the crop, but we only use 0.5lb/a of simazine pre em with Balance so the residual probably isn't there 6months later.

Jim