General Pests—Pod Fill / Dry Beans / Agriculture: Pest Management Guidelines / UC Statewide IPM Program (UC IPM)

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 (limas, common beans) Identification tip: Entire branches or stems decline, resulting in yellow flagging.	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 (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 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 or stink bug damage Identification tip: Lygus distort pods (pods with blanks). Stink bug damage similar, they also feed on beans.	Armyworm damage Identification tip: Damaged pods have holes chewed in pod (and beans).
Leaves with holes; skeletonized leaves
Armyworm older larva and damage Identification tip: Older larva chews large sections of leaves.	Loopers damage Identification tip: Chew holes in mature leaves.
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 Identification tip: Wavy tan leaf mines in surface of bean leaves.	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.
Bacterial brown spot Identification tip: Oval spots with dead tissue in the center surrounded by a narrow zone of light-green tissue. The centers of the spots may fall out resulting in tattered appearance.	Hallo blight Identification tip: Small, angular, water-soaked spots on the undersurfaces of leaves turn brown and develop characteristic light green to yellow halo around.
Leaves with stippling
Spider mite damage Identification tip: Very fine white or yellow stippling; fine webbing on leaf undersurface.	Leafhopper damage Identification tip: White stippling on upper surface of leaves; small white cast skins, tiny dark varnishlike spots on undersurface of lower leaves.

Text Updated: 06/16