Sentinel Insecticide 2G Sentinel insecticide is used to treat outbreaks of surface feeding insects such as black beetles, weevils, billbugs, ants and many more. The insecticide can be used on all turf types and it is a cost effective alternative to chloropyrifos. It is available in a Granular and Liquid form. Available as a liquid (80SC) or as a granular (2G). Product Tech Sheet Material Safety Data Sheet Product Label