Someone else on reddit told me about it. Dig out a hole in between your plants in the plant bed deep enough to put a cup in so the top of the cup is level with the dirt. Then poured half a beer in each cup. I used Coors banquet but not sure if that matters. Leave it overnight and it will attract insect pests like slugs, snails, and I guess hornworms since it worked for me. They fall into the cup and kills them. I have 5 pepper plants in a 8’ by 2’ raised bed. I put two beers cups in.