Seedling grasses tend to lodge by breaking over at the soil. These herbicides have the potential to be used for selective removal of most grass species from any non-grass crop. Mixing with postemergence broadleaf herbicides frequently results in reduced grass control. At normally used postemergence doses, soil activity is marginal or lacking. Cell Membrane Destroyers Compounds in this group result in rapid disruption of cell membranes and very rapid kill.
Herbicidal oils dissolve membranes directly.
Rapid destruction of cell membranes prevents translocation to other regions of the plant. Severe injury is evident hours after application, first as water-soaked areas which later turn yellow or brown. Maximum kill is attained in a week or less. New growth on surviving plants will be normal in appearance. Foliar activity alone can provide only shoot kill.