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Other Pests You May See—Bloom through Late Fruit Set

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  • Armyworms
  • Green peach aphid
  • Hornworms
  • Leafminers
  • Loopers
  • Lygus
  • Potato aphid
  • Thrips
  • Tomato bug
  • Tomato bug damage
  • Tomato pinworm
  • Whiteflies

Use the photos below to identify pests you may see during the bloom season. Keep records of aphids, caterpillars and armyworms, leafminers and whiteflies. Names link to information on identification and management.

Click on photos to enlarge

Western yellowstriped armyworm and beet armyworm
Identification tip: Young armyworms skeletonize foliage.

Green peach aphids
Green peach aphid
Identification tip: The green peach aphid is dark green to yellow, without a waxy bloom. Tubercles on antennae are converging rather than diverging on the potato aphid.

Identification tip: Both species of hornworms have a large horn on the posterior end of the body.

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

Identification tip: Loopers are easily recognized because they crawl by arching their backs.

Identification tip: Adults are yellowish, brownish, or greenish bugs, about 0.3 inch in length, with a conspicuous triangle in the center of the back that is tinged brown, red, or yellow.

Potato aphid
Potato aphid
Identification tip: This aphid is much bigger than the green peach aphid with a more elongate body shape and is generally found on the terminals of tomato plants later in the season. It is also considered to be more damaging.

Identification tip: Thrips are small insects, about 0.04 inch long. Adults have two pairs of narrow wings which are fringed with hairs.

Tomato bug
Tomato bug
Identification tip: Tomato bugs are slender plant bugs about 1/4 inch in length with long legs and a green body. Nymphs (right) resemble adults (left), but are smaller and lack wings.

Tomato bug damage
Tomato bug damage
Identification tip: Tomato bug damage results in reddish rings around petioles and stems which easily break when contacted.

Tomato pinworm
Tomato pinworm
Identification tip: This caterpillar feeds on leaves and creates blotch type mines but causes most of its damage when it attacks the fruit.

Identification tip: Whitefly adults are tiny, 0.06 inch long, yellowish insects with white wings.

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