AKA Southern Corn Rootworm (in the larval stage). Adults variously reported as between 5 - 9mm long. Larvae to 8mm. Adults yellow to green with eleven black spots on the elytra. undecimpunctata, the abdomen is greenish-yellow with 11 black spots on the elytra. The head, antennae and legs are entirely black or with some greenish-yellow. Life Cycle = Overwinters as an adult in southern states. Eggs are laid at soil surface or below at the base of food plants. Larvae hatch in 7 - 10 days and feed for three to six weeks. The larvae pupate at the base of host plants and emerge as adults in 1-2 weeks.
They are widely dist. except n. Rocky Mtns. Larvae feed on roots of a wide range of plants, including many field crops.
Found under the porch light. This landed on me several times so it is harmless and it didn't mind me stalking it. ") Considered a major pest of many field crops including cucumbers and other squashes, corn, soy. Beetles also transmit crop diseases such as bacterial wilt. Adults also reported damaging to garden plants including hibiscus, roses.