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Dry Beans

Pests and their Damage—Pod Fill

On this page
  • White mold
  • Fusarium wilt
  • Cut out
  • Lygus bug
  • Stink bug
  • Armyworm
  • Loopers
  • Saltmarsh caterpillar
  • Leafminer
  • Common bacterial blight
  • Spider mite
  • Leafhopper

Collapsed, wilted, dying or yellowing
Damaged pods
Leaves with holes

Leaves with mines
Leaves with spots
Leaves with stippling

Use the photos below to identify damage. Names link to more on identification and management.

Click on photos to enlarge
Collapsed, wilting, stunted, yellowing, or dying plants

White mold damage
White mold damage (limas, common beans)
Identification tip: Entire branches or stems decline, resulting in yellow flagging.

Fusarium wilt
Fusarium wilt (of blackeyes) damage
Identification tip: Pale green, flaccid leaves turn yellow and drop off; brown discoloration in center of root, stem, and some branches (seen when sliced).

White mold damage
White mold damage (limas, common beans)
Identification tip: White mycelium on surface of rotted tissue; affected tissue dries and bleaches to pale tan or whitish.

Cut out damage
Cut out damage
Identification tip: An aborted blackeye bean bud is a sign of cut-out, caused by water stress, Thielaviopsis basicola, or Fusarium solani.

Damaged pods

Lygus bug damage
Lygus bug or stink bug damage
Identification tip: Lygus distort pods (pods with blanks). Stink bug damage similar, they also feed on beans.

Armyworm damage to pods
Armyworm damage
Identification tip: Damaged pods have holes chewed in pod (and beans).

Leaves with holes; skeletonized leaves

Armyworm damage
Armyworm older larva and damage
Identification tip: Older larva chews large sections of leaves.

photo of looper damage
Loopers damage
Identification tip: Chew holes in mature leaves.

Saltmarsh caterpillar
Saltmarsh caterpillar young larvae and damage
Identification tip: Young larvae feed in groups, chewing holes in leaves. Older larvae (not pictured here) feed individually.

Leaves with mines Leaves with spots

Leafminer damage
Leafminer damage
Identification tip: Wavy tan leaf mines in surface of bean leaves.

Common bacterial blight
Common bacterial blight damage
Identification tip: Irregularly-shaped spots bordered by a lemon yellow ring; as spots enlarge, tissue in center dies and turns brown.
Leaves with stippling

Spider mite damage
Spider mite damage
Identification tip: Very fine white or yellow stippling; fine webbing on leaf undersurface.

Leafhopper damage
Leafhopper damage
Identification tip: White stippling on upper surface of leaves; small white cast skins, tiny dark varnishlike spots on undersurface of lower leaves.

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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