You should not bait anywhere you have sprayed Bengal Gold Roach Spray. Spraying is done down low and baits are placed higher up. Sprays will contaminate baits making them less attractive. We have a guide here that explains the best treatment and where to use baits and spray. The IGR in Bangal Gold provides up to 6 months residual but the insecticide active only lasts a few days to a few weeks.