Mortein PowerGard Multi Insect Killer kills flies, mosquitoes, moths, cockroaches, spiders, ants, fleas, wasps and silverfish in seconds, and is Mortein’s fastest multi insect killer on cockroaches. For direct kill for flying insects, spray directly at the fly, mosquito or other flying insects for fast results. For direct kill of crawling insects, spray directly onto cockroaches, ants, spiders and other crawling insects for fast results.