How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Squash bug

Eggs are laid in the spring through midsummer on stems or on the undersides of leaves, often in the angle formed where two veins meet. The orange yellow to bronze eggs are elliptical, and are deposited on their sides in groups. Young squash bugs are wingless and pale green to almost white, later turning darker brown. Very young nymphs feed close together. Nymphs grow into adults by late summer or fall. There are several generations a year.

Squash bug nymphs
Squash bug nymphs

Squash bug eggs
Squash bug eggs

Squash bug adults
Squash bug adults

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