Below are stink bugs in potatoes, belonging to the genus Chlorochroa. Adults are ~1/2″ long. Stink bugs are often easy to see on the leaves and stems of potatoes.
General Biology and Crop Damage:
Stink bugs looking much like Chlorochroa feed on many different plants. They can be found in potato fields throughout the season, but most often move into potatoes from neighboring crops, weeds, and native plant communities.
Damage associated with stink bugs includes flagging of leaflets, whole leaves, and growing tips.
Stink bugs often seem to be clumped within fields. Treatment of entire fields for control of stink bugs is rarely required.