As larvae, Flea Beetles live underground in your garden. Here they eat on the roots of the tomatoes, potatoes, peppers, turnips, and vegetables that you love. As adults they feed on the leaves of the plants. You will know if they have been around if you see irregular round holes in the leaves of the plants in the garden. If you see them, you will want them to leave before your crops wither and die. The best way to distract Flea Beetles is to plant Chinese Southern Giant Mustard around your garden. They love this and will leave your other garden plants alone.