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Other pests you may see:

On this page
  • Armyworms
  • Corn leafminer
  • Cucumber beetles
  • Grasshoppers
  • Thrips
Names link to additional information on identification and management.
Click on photos to enlarge
Larva of the armyworm.
Identification tips: Black with a white or red stripe; eggs are covered with a gray, cottony material, found on weeds near field; look for holes in leaves and girdled branches.
Mines created by corn leafminer larvae.
Corn leafminer
Identification tips: Pale-green to yellowish maggots; look for mines on lower leaves up to the sixth leaf.
Western spotted cucumber beetle.
Cucumber beetles
Identification tips: Yellow with black spots or black with white stripes; larvae hatch in soil and feed on roots; adults feed on corn leaves, tassels, and silks.
Grasshopper adult.
Identification tips: Nymphs feed on foliage, most often on the edges of fields near pasture areas or roadsides.
Adult western flower thrips.
Identification tips: Adults are tiny and narrow with fringed wings; immature thrips are wingless and yellowish; look for stunted plants and distorted leaves.

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