Boxelder Bug

Pest: Boxelder Bug (Boisea rubrolineata)

Pest Type: Insect Pest, true bug

Major Identifying Features: Adults are about 1/2 inch long, are mostly black and have three red lines on their thorax and several fine red lines on each wing, wings lie flat when the bug is at rest, nymphs are bright red and develop black wing pads, eggs are yellow when first laid

Life Cycle: Females over winter and lay eggs in spring in crack and crevices of box elder trees’ bark, nypmhs develop in summer, lay eggs and develop into the next nymphal stage, second generation nymphs grow to full size in August and September, in fall they seek shelter (and can come indoors in large numbers)

Pest Rating: Minor

Management Rating: Easy

Host/Season/Outbreak Information: Host include box elder trees, maples, ashes, almond, maple, cherry, apple, peach, pear, plum trees, grapes

Damage Information: Boxelder bug usually feed on the leaves, flowers, and seedpods of the female or seed bearing box elder tree (Acer negundo), or feed on fruits of  almond, apple, cherry, peach, pear, and plum trees, and on grapes, feeding punctures can deform fruit, they do not damage plants significantly but can become a nuisance indoors

Management Options: Prevention by reparing screens and closing up places where bugs can enter the house, and by eliminating hiding places, physical removal with water is very efficient, chemical control is not recommended

Sources:

ipm.ucanr.edu

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