About kudzu bugs
The Kudzu bug, Megacopta cribraria, is also known as the bean plataspid, lablab bug, or globular stink bug. It was first discovered near Atlanta Georgia in 2009 and has since spread to South Carolina, North Carolina, Alabama, and southern Virginia. It has also been found in Maryland on the eastern shore, in southern and central Maryland. Like our other favorite stink bug, the kudzu bug was introduced from Asia. It is very distinctive looking. It is about the size of a pea (1/6”- ¼”), olive green with brown speckles and flat across the back end. They are “true bugs” and have piercing-sucking mouthparts.
Kudzu bug eggs. Photo: Joe Eger, Dow AgroSciences, Bugwood.org
Kudzu bug nymphs. Photo: John Ruberson, Kansas State University, Bugwood.org
The kudzu bugs love kudzu and are one rare example of an invasive feeding on another invasive. Since kudzu is one of its favored hosts in Asia, it is expected that the bug will continue to spread throughout the areas in the U.S. where kudzu grows. It would be nice if the kudzu bug only fed on kudzu but, unfortunately this critter feeds on the leaves and stems of soybeans and can cause serious yield losses. Kudzu bugs also feed on a wide variety of other legumes including other beans, wisteria, and some vetches. So far they are not known to damage non-legume plants. The bugs have several generations in the South; we don’t know how many they have in Maryland.
Kudzu bugs have something in common with other invasive insects such as the Brown Marmorated Stink Bug and Asian Lady Beetles. They don’t like to spend the winter outdoors. In the fall, they often congregate on light colored surfaces, such as siding, fascia boards, etc. before moving into structures. They will enter buildings under siding, gaps around windows, doors, vents, or pretty much any entry point they can find. Like the stink bugs come spring time they will try to get back outside in search of food. Needless to say they can be a real nuisance to people. The best method of dealing with them in residences is basically the same as other home invaders. Seal your home or building up as tight as you can to prevent entry.
Additional resource
Kudzu Bug | University of Georgia