Last year I had bagworms galore on my evergreens. What can I do to prevent them this year?
There are no preventions for bagworms, besides making sure you’ve hand picked and destroyed any remaining bagworms still hanging on your plants. These little bags can have as many as 500 plus eggs in them, so pick and destroy before they hatch, which usually occurs late May. If they show up at that time on your plants, then spray with Bt or Captain Jack’s Deadbug Brew. But not before you see the whites of their beady little baggy eyes!