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Aphid and Adelgid

Order: Hemiptera
Superfamily: Aphidoidea

Bean aphid
Bean aphid

Pests as nymphs and adults

Appearance

  • Pinhead size
  • Piercing/sucking mouthparts
  • Globular soft bodies (tear-drop, pear-shaped)
  • Long spindly legs & antennae
  • Twin "jet-pipe" cornicles (backward pointing abdominal tubes)
  • Slow moving
  • May or may not have wings

Symptoms

  • Wilting, twisted, malformed leaves and buds
  • Yellowing foliage
  • Some: galls
  • Some: plant pathogens
  • Sticky honeydew which attracts ants, bees & wasps and may lead to sooty mold
  • Some: cottony tufts or dirty-white crust on bark
  • Some: powdery waxy film

Biology

  • May overwinter as eggs, nymphs or adults
  • Pests as nymphs and adults
  • Asexual reproduction
  • Live young
  • Many offspring with short generation times

Control

Physical

  • Protect with polyester-fiber row covers
  • Aluminum foil collars
  • Spray forcefully with garden hose
  • Yellow sticky traps

Cultural

  • Proper nitrogen fertility
  • Compost culls

Biocontrol

  • Conserve natural enemies (lady beetles, lacewing larvae, parasitic wasps, soldier beetles)
  • Mass-releases from commercial insectaries

Pesticides


Contact Us

Integrated Pest Management

Mailing Address:
University of Idaho, Boise Center
322 E Front St, Suite 180
Boise, ID 83702

Phone: 208-364-4046

Fax: 208-364-4035

Email: rhirnyck@uidaho.edu