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Stink Bugs and Shield BugsRequest for bug ID
Hi WTB,
This bug rapidly proliferates in my kale patch. First showed up on the tree kale, but rapidly moved into the other more common kales. We live an hour drive north of San Francisco. I first noticed the bugs in mid-September. They don’t clump together, but there will be several on each leaf if I don’t pick them off. They have a loose grasp on the leaf and readily fall off if the leaf is jostled. They don’t seem to change appearance much from the time they are first noticeable (about 1.5mm long) to the size in this photo (about 3/16 of an inch long). I believe the actual color is a bit more orange and less yellow that in the picture. Thanks for any help.
Paul

Hi Paul,
The Harlequin Bug, Murgantia histrionica, is a species of Stink Bug in the family Pentatomidae. They are pests on plants in the cabbage family and are frequently found on Alyssium and the mustard that grows wild in much of California. The specimens in your photo are immature nymphs. The adults have wings.

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