How to Manage Pests

Pests in Gardens and Landscapes

Carrot beetle—Tomarus (=Ligyrus) gibbosus

Carrot beetles infest flowers such as dahlia, iris, lily, and sunflower. Adults are reddish brown, 1/2-inch long, and feed both above and below ground. Larvae are up to 1-1/4 inches long, white to bluish, and have a dark head.


Foliage yellows and wilts. Plants may be stunted, fall over, or die from root-feeding beetles. The basal stems or leaves may be chewed.


Exclude adults, which fly at night to lights. Eliminate decaying vegetation that harbors adults around plants.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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