Selectivity is based on the plants ability to rapidly metabolize the herbicide before it becomes toxic. Weeds are controlled because they metabolize at a lower rate. ALS inhibitors are readily taken up by leaves and roots. As soil pH decreases, persistence increases with IMI's. Low organic matter increases adsorption.
Degradation is favoured by high pH and high microbial activity.
Company phase out of herbicide started in 1996 and product manufacturing is stopping. Moisture needed for activation. Will leach on sandy soils. Has shown activity on kochia, Russian thistle, cleavers. Is weak on mustards.