UC IPM Online UC ANR home page UC IPM home page


SKIP navigation



Other pests you may see:

On this page
  • Aphids
  • Armyworms
  • Corn leafhopper
  • Corn leafminer
  • Cucumber beetles
  • Cutworms
  • Grasshoppers
  • Seed rots and damping-off
  • Thrips
Names link to additional information on identification and management.
Click on photos to enlarge
Corn leaf aphid nymphs and adults.
Identification tips: Bluish-green, can be winged or wingless; look for curled leaves and stunted plants, honeydew on leaves, or black sooty mold.
Use the key to identifying aphids.

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.
Adult corn leafhopper.
Corn leafhopper
Identification tips: Adults are very small, tan, and have two distinct black spots between eyes; nymphs are tan or green and wingless; both feed in whorls and on leaves; look for stunted corn, dry leaves, sticky honeydew, and black sooty mold.
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.

Photo not available

Seed rots and damping off
Identification tips: Infected tissue may be water-soaked (Pythium), white to pink (Fusarium), or bluish (Penicillium); look for brown, soft stem and yellow, wilted leaves.

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C113/m113dpotherpests.html revised: June 24, 2016. Contact webmaster.