which best corkraoch insectide

If you are using it indoors at your house, we recommend using the Advion bait gel along with the Gentrol IGR and Suspend SC. The Advion bait gel can be used around the kitchen corners, bathrooms, etc. You may mix the Gentrol IGR and Suspend SC in the same sprayer and use it as a surface treatment in areas that you see the roaches. You can also do a perimeter treatment around the house to prevent further infestation.