University of Minnesota Extension
www.extension.umn.edu
612-624-1222
 Menu  Menu

Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Beetles, bugs, ants, and other insects without obvious wings - Under 1/4 inch long > Northern corn rootworm

Northern corn rootworm

Diabrotica barberi

Northern corn rootworm

Jeff Hahn, University of Minnesota


Size: 1/6 - 1/4 inch long

Where/When: Feeds on corn silk and flower blossoms of a variety of flowers including roses, dahlia, sunflowers and similar plants. Northern corn rootworms are present August to September.

Significance: When feeding is severe and the corn silk is eaten before it is pollinated, the ear will not develop properly. They chew ragged holes in flower blossoms and can make them unsightly. The severity ranges from slight to severe.

More information on Northern corn rootworm...

Did this tool help you identify the insect? Tell us.
  • © 2015 Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy