What’s all the frass about?

I have always planted an abundance of parsley and dill in the spring… one clump for us and 3 or 4 for the butterflies. Not many butterflies have been fluttering through this neighborhood so I was overjoyed three weeks ago when I saw some frass or caterpillar poo beneath a big pot of parsley, the parsley we used for the kitchen! Immediately, I took the pot off the deck and placed it in a secure place in the garden.

I knew exactly what caterpillar made this frass… the Eastern Black Swallowtail butterfly (Papilio polyxenes) that uses plants in the carrot family as hosts. I spotted several tiny caterpillars on the parsley and watched them develop through several instars for about two weeks.caterpillar poo

Dainty but constant eaters, they almost cleaned out the potted flat parsley and moved on to curly parsley and dill in the garden.

They were plump and beautiful and ready to pupate when we left for a week’s vacation.

We returned home yesterday and I checked the parsley. All the caterpillars were gone, hopefully tucked securely in their chrysalis quite a distance from the host plant. How exciting to play a part in raising these beautiful butterflies!

I keep checking for an egg, but unfortunately no monarch butterfly has visited their host plant in our garden, butterfly weed (Asclepias tuberosa). At Rolling Green Nursery where I work, I have seen a few monarchs feeding on butterfly weed we have for sale. Let’s hope the female below left an egg on the plant. Just seeing the insect is encouraging for our diminishing population of monarchs.

monarch butterfly at Rolling Green Nursery, NH

 

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