@QVCFanfromLongIsland
I have no idea about flat leaf parsley being a surface on which to lay eggs. This was the first year I grew Italian parsley from seeds to seedlings. They germinated well and then chipmunks continuously dug them up, day after day, until only one tiny underdeveloped seedling was left. These chipmunks have been so destructive with all of my potted plants. So frustrating! I had them planted with purple basil and they weekend the root system so much that it may not survive either.
Congratulations on keeping your parsley! Have you considered a light spray of organic, plant safe insect repellent? I have had great luck with the Bayer brand concentrate. Next year, I will buy a fully developed plant from my local greenhouse nursery and see if I have better luck.
I have read other posts here and I agree that it is a catch 22. Butterflies are wonderful in so many ways. I will have to buy parsley this year, but luckily I don't use a lot of it and it is readily available and not too pricey.