Try sprinkling the plants with water, then with wheat bran. The beetles will eat the wheat bran, which then swells causing the beetle to explode. Effective homemade sprays can be made from boiled basil or cedar chips. Add 2 tbsp. Flea Beetles Flea beetles are found throughout North America.
Colors range from high gloss black to iridescent blue, green, or bronze.
Some have yellowish legs, antennae, or wing markings. You will never get close enough to get a good look at the little critter. The bugs winter over in garden debris, so keep the garden clean in winter. Teas made from repellent plants such as wormwood, mint, hot peppers, garlic, onions or catnip make effective sprays. A sprinkling of wood ashes or ground limestone discourages the beetles, who dislike dustiness.