Trap crops are used to keep the bugs busy eating a plant you don’t care much about so they leave your more treasured plants alone.
Consider a trap crop a distraction, a red herring crop? It’s like they are saying, “Hey, look at me- over here- ignore that big green handsome crop down the way- I taste much better!"
I think I have discovered -inadvertently- a new trap crop for some kind of bug. I am guessing it is earwigs.

Here is a photo of swiss chard that was planted in early spring. There are 4 of them and none have reached more than 6 inches tall. They are always ragged looking and the leaves are full of holes.

Chard all eaten up

Swiss Chard holier than Swiss Cheese

I usually don't like it when bugs banquet on my garden crops, but since they picked the swiss chard, I not going to complain too much. Here is a photo of the kale that is inches away from the chard. I guess they didn't like the kale!
Kale not eaten

Perfect Kale

I love kale and there are so many ways to use it. A special favorite is to put it in soups, casseroles, and chili. Once in a while I even sneak a small bit into the morning smoothies!

How do you like your kale?