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adults and nymphs

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UC-Davis

Adults:
Potato aphids are approximately 1/4 inch (2.5-3.5 mm) long and can be pink or green in color. The soft body has a pear shaped appearance with a pair of long slender cornicles on its abdomen. Potato aphids are usually wingless.

Click for image of

adults and nymphs

by

UC-Davis

Eggs:
Potato aphids overwinter in the egg stage. The eggs are very minute (less than 1 mm), black, and shiny.

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of adults and nymphs

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UC-Davis

Nymphs
The immature potato aphid is called a nymph and passes through four developmental stages, followed by a pre-reproductive stage before becoming a reproductive adult. The nymphs are similar in color and body shape to the adults. Adults and nymphs are usually clustered together. Within 5-7 days, nymphs are able to reproduce.