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adult

by

University of Minnesota

Adults:
The adult asparagus beetle is about 1/4 inch (6 -9 mm) long, has a long, smooth, shiny, slightly elongated hard body. Its antenna are slightly less than half the body length. The adults have a metallic blue head. The thorax is red with two blue spots. Each bluish-black wing cover has three yellowish square spots and a red border.

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Kansas State University

Eggs:
Eggs are deposited on the asparagus shoots. The eggs are a shiny black color and oblong shaped. The eggs are difficult to remove. The eggs hatch in about 1 week depending on temperature.

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University of Minnesota

Larvae:
The larva is a slender white grub with a segmented body about 1/3 inch (10 mm) long. The body has a dark spot at both ends and very short legs near the head. The larva spends all of its life stage feeding underground until pupation.

Pupae:
Larvae pupate in the soil and the adult emerges in approximately 5-10 days.