Bonide Captain Jack’s BT Organic Worm & Caterpillar Control. This 32-ounce ready-to-use spray harnesses Bacillus thuringiensis, a naturally occurring bacterium that specifically targets destructive caterpillars while protecting beneficial insects like honeybees and ladybugs.
It works! (Sorry about the devastation. It sucks.)
Or the spinosad from the same brand. A little more specific for cabbage worm per my wife.
Glad you brought that up! I spent a lot of time reading the teeny print on those bottles and others that list EXACTLY which pests they work on. I was going to recommend that you KNOW which pests are eating the plants before buying any of it. This has a bit more info: https://plantingguys.com/gear-guides/best-insecticide-for-cabbage/
There's a thing called a Sap Beetle that might be the culprit. I used to have scads of wild raspberry plants at a couple of houses I've lived in. I never saw a beetle until I <gulp> looked down at the berry I was eating only to see the critter lying inside. From then on, I never ate a berry I hadn't inspected. And there were many, many beetles.
@Bette @johntimaeus @briankrebs the only critters I've ever actually seen on them are stink bugs. But they're an unlikely culprit, because they seem to eat the fruit and use the leaves for cover. Plus they're rare where I live: I see one maybe every other year.
I always inspect every raspberry I eat inside and out, whether store bought or from my garden. Experience.