Hi Carla, here's a guide! https://homeguides.sfgate.com/kill-potato-beatles-29389.html Hope it helps!
Introduce ladybugs, natural predators of the potato bug, into the garden. Purchase ladybugs at local garden centers or online. Release the ladybugs at night to allow the insects to get used to their environment when the temperatures are cooler. Sprinkle a small amount of water on and around the ladybugs for moisture and hydration.
Sprinkle wheat bran over the plants and leaves; the potato bugs will consume the wheat bran. The wheat bran will continue to expand in the beetle's stomach and cause the pest to die.
I like your idea of wheat bran!
A botanist I follow recommends using Dr Bronners to make a soap spray. A few squirts of Dr Bronners castile soap in a spray bottle of water. Spray on the underside of the leaves.
Hi Carla: Here are a couple of sites that may help: