and life cycle—Asparagus beetles
Adult beetles overwinter in garden debris, especially old ferns. They emerge when spears first emerge.
Beetles feed and lay dark brown eggs singly or in rows on spears. Eggs hatch in 3 - 8 days. Larvae are
blue gray with black heads and feed on plant tips. Mature larvae drop to the ground and pupate just below
the soil surface. A new generation of adults emerges in 1 - 2 weeks. After spears are harvested, beetles
and grubs feed on ferns. There may be up to five generations a year.