Melvin writes
You can apply Advion Cockroach Gel Bait anytime in areas where you have not applied a spray such as an Ortho product. A good way to remember this rule is "spray low and bait high". Otherwise, we recommend waiting about 2 weeks to apply bait gel to spots where you have just applied a residual insecticide.
We have more tips on how to treat for roaches in our online guide here.
Answer last updated on: 08/09/2021