4 (1 = rare 5 = annual)

2 (1 = very little damage 5 = plants killed)

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Stink bug adults are green or brown, flat-topped insects that are about 1/2 inch long. They are shield-shaped, with a large triangle on their backs. They lay their eggs in clusters on the leaves. Nymphs are rounded, variously colored, and look little like the adults until they approach maturity.

Stink bugs are a contaminant in harvested peas because the nymphs are the correct size and shape to be indistinguishable from the peas by mechanical harvesting equipment.

Most overwinter as adults and lay clusters of barrel-shaped eggs on flowering plants and fruits in the spring and early summer. Nymphs (immature stages) feed on similar host plants. At the site where they insert their feeding stylets (beaks) into plants, cells are killed and subsequent growth around those cells may take on a distorted shape. Different species may undergo 1, 2, or 3 generations per season before adults become dormant to pass the winter.

Use a sweep net to scout pea fields within a few days of harvest to determine if a problem with stink bugs exists. If necessary, use an insecticide with a short preharvest interval to control the stink bugs. An alternative to an insecticide application is to adjust blowers and air cleaners within the processing plant to effectively remove the bugs.

Home, Yard & Garden Pest Guide
The Home, Yard & Garden Pest Guide (C1391) provides is written for homeowners and other residents and provides nonchemical and current chemical recommendations for controlling pests associated with trees, shrubs, turf, flowers, groundcovers, vegetables, fruit, and houses. In addition, you'll find detailed information about integrated pest management, pesticide safety, and pesticide application and calibration techniques. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "C1391").
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U of IL - Distance Diagnosis through Digital Imaging
A free plant, weed, insect and disease identification service available through your local University of Illinois Extension office. Center Educators or State Specialists review & respond to information and digital images submitted by local Extension office personnel. Some samples may require further examination or culture work (nominal fee involved) at the U of IL Plant Clinic.
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U of IL - Plant Clinic
Services include plant and insect identification, diagnosis of disease, insect, weed and chemical injury (chemical injury on field crops only), nematode assays, and help with nutrient related problems, as well as recommendations involving these diagnoses. Microscopic examinations, laboratory culturing, virus assays, and nematode assays are some of the techniques used in the clinic.
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