Harlequin Bug

Description:

Murgantia histrionica goes by a few common names ; derived mostly from the variegated color pattern and irregular markings on its back, such as "Calico Back", "Calico Bug", "Fire Bug", and more commonly, the "Harlequin Bug". Harlequin bugs measure approximately 8-11.5 mm (about 3/8 in.) and are shaped like a convex shield with slightly curved corners. Like other stink bugs, they produce odors from their thoracic glands, using them as a defense against predators. Harlequin bugs are native to Mexico and Central America, and are an invasive species in North America, having been first detected in Texas in 1864. They are now found throughout the U.S. as well as in parts of Canada adjacent to New England, and all the way south to Mexico. In the southernmost states, the Harlequin bug is considered a pest, especially on cruciferous plants (any plants of the family Cruciferae ; cabbage, kale, mustard, broccoli, and turnip). The bugs can ruin the market value of such crops by causing yellow and white blemishes on foliage. Adult Harlequin bugs are dormant during the winter, and become active when temperatures rise in early spring. They go through three or more generations in the southern U.S., but usually only one generation in the northern states.

Habitat:

It can be found in primarily Brassicaceae (horseradish, cabbage, cauliflower, collards, mustard, Brussels sprouts, turnip, kohlrabi, radish); may also attack tomato, potato, eggplant, okra, bean, asparagus, beet, weeds, fruit trees and field crops as well as home gardens.