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Dry
Beans > Year-Round IPM Program > Pod
Fill > Damage
to Plants
Dry Beans
Pests and their Damage—Pod Fill
On this page
- White mold
- Fusarium wilt
- Cut out
- Lygus bug
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- Stink bug
- Armyworm
- Loopers
- Saltmarsh caterpillar
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- Leafminer
- Common bacterial blight
- Spider mite
- Leafhopper
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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.
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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).
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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.
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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.
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| 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.
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Armyworm damage
Identification tip: Damaged pods have holes chewed
in pod (and beans).
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| Leaves
with holes; skeletonized leaves |
Armyworm older larva and
damage
Identification tip: Older larva chews large sections
of leaves.
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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.
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| Leaves
with mines |
Leaves
with spots |
Leafminer damage
Identification
tip: Wavy tan leaf mines in surface of bean leaves.
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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
Identification
tip: Very fine white or yellow stippling; fine webbing
on leaf undersurface.
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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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