Seeing a strange brown-and-white caterpillar on citrus does not automatically mean you have a pest emergency. Giant swallowtail caterpillars can use citrus and related plants as larval hosts.
Butterfly or pest?
Correct identification matters before treatment. A healthy established citrus tree can often tolerate limited leaf feeding very differently than a newly planted tree.
Earth People approach
We identify what is present, assess actual plant risk and avoid unnecessary broad-spectrum treatment.