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 - 1/4 inch - 1/2 inch long > Bean leaf beetle

Bean leaf beetle

Cerotoma trifurcata

Bean leaf beetle

Jeff Hahn, University of Minnesota

Bean leaf beetle

Jeff Hahn, University of Minnesota


Size: 1/4 inch long

Where/When: Feeds on leaves of snap peas (string peas, green beans). Also, on soybean, clover, and other legumes. Adults are active mid-May to early June and mid-July through September.

Significance: Low numbers usually not injurious. High numbers can defoliate plants and kill young seedlings; they can also reduce vigor and yield of plants. Feeding on bean pods later in season is usually just cosmetic.

More information on Bean leaf beetle...

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