Yup,..that's way more effective than Perlite. For soil bound insects , sometimes diatomaceous earth is used as you had intended the Perlite to do. Not the same . Diao. actually cuts the critter to pcs. as they travel thru/around it, like glass.......with perlite, i have witnessed lil bugs go behind the pcs. to hide wtf! For lil critters that fly around , those yellow sticky traps will soon tell you if you have a problem and with wat exact critter, as they attract them so....cheers.