What has been in the media as of late is the systemic type of insecticides on flowering plants that bees may visit for pollen. Systemic means the plant takes it up with its roots and is taken throughout the entire plant.
The first question we ask is, Does the plant produce flowers that bees visit? In this case of grass, it does not, so the exposure of bees to the imidacloprid (e-media-cloe-prid) applied to the lawn is probably minimal. We also use a granule product so we get no drift like a liquid may drift into flowers.