Origin

The brown marmorated stink bug, Halyomorpha halys, is native to Asia.

Life Cycle

Adults emerge from overwintering in April. Eggs are 0.06 in. (0.16 cm), pale green and first generation eggs are laid mid-Spring. Most egg masses have about 25 eggs. The nymphal stages do not have developed wings. All instars have deep red eyes. Size ranges from 0.13-0.75 in. (0.32-1.9 cm) as the insect grows and molts. Nymphs are first red, turning almost black, and then finally becoming brown as adults. They are the typical "shield" shape of other stink bugs, almost as wide as they are long. Only one generation has been observed; however, there are likely to be multiple generations as it spreads south.

Distribution

It has been detected in 38 states including Washington, Oregon, Idaho, California, Arizona, New Mexico, Texas, Kansas, Nebraska, Minnesota, Iowa, Missouri, Illinois, Wisconsin, Michigan, Indiana, Ohio, Kentucky, Pennsylvania, New York, Vermont, New Hampshire, Maine, Massachusetts, Rhode Island, Connecticut, New Jersey, Delaware, Maryland, West Virginia, Virginia, Tennessee, North Carolina, South Carolina, Georgia, Alabama, Mississippi, and Florida and continues to spread. Hosts include maple, serviceberry, birch, butterflybush, pepper, pecan, catalpa, hackberry, redbud, citrus, dogwood, cucumber, fig, sunflower, honeysuckle, tomato, apple, plum, pear, rose, lilac, linden, viburnum and grape.

Control Efforts

Injuries caused by feeding produce small necrotic areas on the outer surface of fruits and leaves. Scarring is common on fruits such as apple and peach. On other plants may have roughly circular stippled areas about 0.13 in. (0.32 cm) inch wide. Adults begin overwintering at the end of September and become a nuisance as large numbers congregate and invade buildings in search of overwintering sites. The STOP brown marmorated stink bug website has been setup to provide current information on this pest.

Resources

• Featured Creatures - Florida Department of Agriculture and Consumer Services, Division of Plant Industry and University of Florida
• Brown Marmorated Stink Bug - A New Exotic Insect in New Jersey - Rutgers Cooperative Extension
• STOP brown marmorated stink bug - Northeastern IPM Center

Selected Images

Maps

Invasive Listing Sources

• Idaho Invasive Species Act
• Invasive Species of Concern in Georgia
• Maryland Invasive Species Council - Invasive Species of Concern in Maryland
• West Virginia Invasive Species Strategic Plan and Volunteer Guidelines 2014