I don't, I just squash them every chance I get. I finally got all my kids trained that they ARE NOT green ladybugs, kill them all!!!!! They have reeked a bunch of havoc on one of the cantaloupe vines, but have left other stuff alone aside from just crawling and flying around everywhere. More of an annoyance than an actual problem as far as I can tell. I have seen the meadowlarks and other small native birds eating them like crazy though, so I try to leave some behind for the others to eat too.