Other Pests and Damage You May See During Preharvest

On this page
  • Cutworms
  • Flea beetles
  • Hornworms
  • Leafminer damage
  • Lygus damage
  • Tomato pinworm damage
  • Tomato psyllid nymph
  • Whiteflies damage

Use the photos below to identify pests and damage you may see during preharvest time such as whiteflies, leafminers, hornworms, lygus, cutworms, psyllids, tomato pinworms, and flea beetles. Names link to information on identification and management.

Click on photos to enlarge
Variegated cutworm, Peridroma saucia, larva.
Identification tip: Cutworms are various colors, hide during the day, curl up into a C-shape when disturbed, and chew irregular holes in the surface of fruits, especially fruit touching the ground.

Flea beetle damage
Flea beetles damage
Identification tip: Flea beetles may feed below the calyx on ripe tomato fruit.

Identification tip: Both species of hornworms have a large horn on the posterior end of the body. The tobacco hornworm (shown above) has seven diagonal stripes on each side of the body, in contrast to the tomato hornworm, which has eight chevron-shaped stripes. They can cause substantial defoliation.

Leafminer damage
Identification tip: Leafminer feeding results in slender, white, mined leaflets.

Lygus damage
Lygus damage
Identification tip: Fruit skin usually splits over the site of lygus bug feeding injury.

Tomato pinworm damage
Tomato pinworm damage
Identification tip: Tomato pinworm eats its way through the calyx and continues tunneling in the fruit.

Tomato psyllid nymph
Tomato psyllid (nymph)
Identification tip: Younger nymphs (bottom) have scalelike flattened, oval, yellowish green to orangish bodies with red eyes and three pairs of short legs. Older nymphs (top) are greenish and fringed with hairs and have wing buds, which make them easy to distinguish from whitefly nymphs.

Whiteflies damage
Identification tip: Silverleaf whitefly damage causes uneven ripening.


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