I plant fennel near my plots as a sacrificial plant to the hornworms. Then I kill them with my bare hands when I catch them eating the fennel. They don't seem to bug the peppers much. That's probably because there are tons of wolf, jumping, and other spiders that like my pepper plots an plants (my pods have spiders of different species and webs in their crevices there are so many). I suggest jumping spiders man. I saw one a fraction of the size of a hornworm kill it and hold it in its mouth, lol. There are also some natural wasps here that lay white eggs all over the hornworms and paralyze them. The larva eats their insides alive after they hatch.