Plant Diagnostic Database

Harlequin Bug  (Margantia histrionica)

                       

harlequinbug

harlequinbugnymphs

harlequinbugeggs

harlequinbugdamage

 

 

 

 

 

                                                                                                                                                                                              
Hosts:

Cabbage family plants (cabbage, cauliflower, brussels sprouts, broccoli, kohlrabi, kale).

Description:
Adults are flat, 3/8 inch long, shield-shaped stink bugs with red and black spotted markings; nymphs look like adults, but are smaller and more round.
Life Cycle:
Adults overwinter under debris. They emerge in mid-spring and lay eggs by early summer. After hatching, nymphs feed for two months, by which time they are mature. There can be 1-2 generations per year.          
Controls:
Cultural:
Botanical:

Control weeds by removing, or mowing in crops or adjacent areas.  Attract native parasitic wasps and flies by planting small-flowered plants.

Spray with pyrethrin. 

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