We have several tomato plants in containers on our deck. This is the 2nd season we have had the hornworms, so we've been inspecting daily and picked off quite a few, avoiding major damage. We now have 3 worms that are parasitized. Everything I have read says to leave them on the plant. But, when, if ever, can I remove them? How will I know the wasps have emerged? I'd like to spray with BT, but don't want to kill wasp larvae. Any advice? They are gross andI would love to be rid of them, lol! Thanks!