Sunflower XIV-12

Carrot Beetle

Frank B. Peairs

Carrot Beetle

Field Biology and Identification

A moderate size 13 to 17 millimeter (1/2 – 11/16 inch), oblong‑ovate, dark reddish‑brown to black beetle.  Wing covers have longitudinal depressed furrows with punctures.  Adult beetles overwinter in the soil and emerge in the spring to lay eggs.  The larvae are C‑shaped and white, resembling common white grubs.  They feed on grasses and decaying vegetation in the soil but will attack the roots of crops.

Plant Response and Damage

The second‑brood adults feed two to 13 centimeters (one to five inches) below the surface on sunflower roots.  Adult beetles chew on roots leaving a gouged appearance.  Large infestations may cause stunting, wilting, and lodging.

Management Approaches

No control is currently recommended for this insect.

Categories: Sunflower, Insects, Carrot beetle

Date: 04/16/2004