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Bean Leaf Beetle

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PEST FACTS AND IMPACT ON CROP

Latin name is Ceratoma trifurcata

  • Although the larvae feed on soybean roots, most damage occurs from adult feeding on foliage or pods
  • Found east of the Rocky Mountains, wherever soybeans are grown
  • No significant natural enemies are known
  • Hosts: alfalfa, clover, green beans, wild legumes such as tick trefoil
  • Generations per year
    • 3 – Southeast United States
    • 2 – Iowa and Illinois
    • 1 to 2 – Wisconsin
    • 1 – Canada
  • Adults overwinter in woodlots and fence rows
  • Quickly killed if exposed to temps below 14° F
  • Adults may feed on alfalfa in spring before soybeans emerge

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