Dill Weed Worms

Question

My potted dill has been infested by some kind of small worm. Other herbs in the same patio pot are not affected. What are these pests, and what can I do to eliminate them?

Answer 1

It may be an Eastern Black Swallowtail: http://www.fcps.edu/islandcreekes/ecology/eastern_black_swallowtail.htm

Regardless, this article will help you with caterpillars in your garden:
https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm