Beneficial Insects in Field Crops

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Wendy Wintersteen and Marlin E. Rice
Department of Entomology
Iowa State University

This publication features 17 full-colored photos of beneficial crop insects, including lady beetles, green lacewing, damsel bug, flower fly, spined soldier bugs, ground beetle, minute pirate bug, and aphid mummy in the adult, larva, pupae, egg, and cocoon stages.

The text provides information on each insect, including physical description, reproduction, and types of insect pests each feeds upon in the field.


  • Alfalfa weevil
  • Aphid
  • Aphid mummy
  • Armyworm
  • Black cutworm
  • Caterpillar
  • Convergent lady beetle
  • Corn earworm
  • Damsel bug
  • European corn borer
  • Flower fly
  • Green lacewing
  • Ground beetle
  • Lady beetle
  • Loopers
  • Minute pirate bug
  • Mites
  • Parasite wasp
  • Plant bug nymphs
  • Potato leafhopper
  • Seven spotted lady beetle
  • Spider mites
  • Spined soldier bug
  • Twelve spotted lady beetle


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