Euschistus servus

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Euschistus servus on cotton (click on image to enlarge it)
Author(s): Russ Ottens, University of Georgia
Source: Wikimedia Commons

Euschistus servus (Say, 1832) - (brown stink bug)

This stink bug is a polyphagous pest in North America, infesting for example cotton, soybean and corn (maize). However, it also attacks and breeds on many other crops like wheat, peach or tomato. The piercing and sucking activities of the bugs can results in the death of seedlings, stunting of the crop, or abortion of fruits or seeds.

The adults are 10-15 mm long, yellowish grey with dark brown punctures on the upper side. The nymphs develop through five instars over a period of about 1 month. There are usually several generations per year (up to 5) with the bugs migrating between host plants. E.g. the 1st generation might develop on wheat and the 2nd one on corn (maize). The adults of the last generation overwinter. Stink bugs may be controlled with insecticides, but action thresholds need to be observed.