Ready-to-use spray for control of ants, earwigs, woodlice, silverfish, cockroaches and beetles Zero In Ant & Cockroach Killer 1Litre Indoor and Outdoor use - Ant Killer Spray Fast-acting contact killer for treatment in homes, patios and gardens with new added germ control,Defenders® Ant Killer Powder is an insecticidal powder for the control of ants, woodlice, cockroaches, earwigs and other crawling insects. For use in the home and garden. 100% kill on contact. For crack and crevice treatment in homes, patios and gardens.