I would rather not have the worms on my beautiful parsley plant. Can I get rid of the worms safely by spraying vinegar or apple cider vinegar on them?
Vinegar actually works as a weed killer in the garden, but would also kill your Parsley.
Here is an article about controlling pests in the vegetable garden.
You can also treat the plants with Neem Oil.
Neem Oil is organic and is safe for people, pets and bees.