Hi Beverly! I'm so glad you found my article and enjoyed reading about the Giant Swallowtail butterflies!
When I wrote about these beautiful butterflies, I wanted to make the point that they did not harm my citrus trees. They really aren't aggressive eaters, like some larvae can be. I've seen some nibble on the same leaf for their entire life as a caterpillar! Over the years of observing them, they have never caused damage to any of my citrus trees! And, like you, I'm always hoping people will reconsider the use of chemicals!
Thank you for telling your experience with them. Choisya ternata looks like a plant I would like to learn more about!
Best wishes with growing it again!
Thanks again for your comments.