Onespotted Stink Bug
Euschistus variolarius (Palisot de Beauvois)

Life Cycle: Overwinter as adults in or near orchards and become active in spring. Eggs are laid on weeds on which nymphs develop to adults (they do not reproduce on fruit trees). Two generations produced per year (June and August).

Monitoring: Limb taps will detect presence but not abundance. Adults readily drop to ground when disturbed.

Hosts: Various native plants; attack fruit trees when native host plants dry up towards end of summer.

Comments: Other species of stink bugs also cause similar damage in orchards. They have the same shield-shape and vary in clour from green to gray-brown. Early season feeding on young pome and soft fruit causes cat-facing and dimpling. Adult feeding on pome fruit later in season causes a white to pale green cottony spot to form beneath the puncture, often with some browning.

Body length: Adult - 12.0mm; Mature nymph - 11.0mm