Dusky stink bug

Dusky stink bug

Euschistus tristigmus (Say)

Hemiptera: Heteroptera: Pentatomidae


Stink bug adults have a broad, flattened, shield-shaped body and a narrow head. The dusky stink bug is dark brown, with sharp shoulder projections (A).

  • Damage

    Can cause fruit damage in all tree fruits under conditions that are not yet fully understood. Adult feeding during bloom and shuck split can cause the fruit to abort, and feeding later in the summer can cause a deep catfacing injury (B) such as that caused by tarnished plant bug (Lygus lineolaris), or depressed, dimpled, corky or water-soaked areas on the skin (C, D). All tree fruits are attacked, especially peaches and apples. Other species of stink bugs are beneficial predators.

    Management

    Elimination of alternate host broadleaf weeds, especially legumes, in the orchard will contribute to management efforts. If control is needed, insecticides should be timed to kill immigrating adults as they appear in the orchards to prevent feeding damage and subsequent mating and egg laying.

    Crops Affected

    • Apples
    • Cherries
    • Peaches
    • Pears
    • Plums
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