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Identifying Fruitworm Eggs and Potato Aphids

On this page
  • Tomato fruitworm egg
  • Potato aphid
  • Healthy and parasitized tomato fruitworm eggs
  • Potato aphid parasitized

Use the photos below to identify both healthy and parasitized fruitworm eggs and potato aphids before you monitor leaf samples during bloom. Names link to more information on identification and management.

Click on photos to enlarge

Fruitworm eggs

Potato aphid

Fruitworm eggs
Tomato fruitworm egg
Identification tip: Cabbage looper eggs (right), sometimes confused with fruitworm eggs (left) are similar in shape but have finer ridges.

Potato aphid eggs
Potato aphid
Identification tip: The potato aphid has both a pink (top)–and a green (below)–color biotype. This aphid is much bigger than the green peach aphid; it has a more elongate body shape and is generally found on the terminals of tomato plants later in the season than green peach aphids.

Fruitworm eggs
Healthy and parasitized tomato fruitworm eggs
Identification tip: Healthy (white) and parasitized (black) eggs of tomato fruitworm.

Parasitized potato aphid
Potato aphid (parasitized)
Identification tip: Different parasites leave potato aphid mummies in varying colors. The parasitized aphid above is black.

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

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