Europe
Garlic mustard (Alliaria petiolata)
Eggs are less than ½ mm long and pale yellow. Larvae are C-shaped, legless grubs up to 3 mm long that are white with distinctive reddish-brown head capsules. Adults are up to 2½ mm long with long, thin snouts. They are black but sparsely covered with short lighter hairs and scales, giving them an overall dark gray appearance.
This species overwinters as adults. New adults emerge from late spring through early summer and feed on garlic mustard leaves and sometimes flowers. Females lay eggs in pods containing developing seeds. Several eggs can be laid into the same pod. On average, females lay 160 eggs in their lifetime. Larvae feed on ripening seeds, developing through three instars. Mature larvae exit seed pods by late June and pupate in the soil. There is one generation per year.
Becker, R., E. Gerber, H.L. Hinz, E. Katovich, B. Panke, R. Reardon, M. Renz, and L. Van Riper. 2013. Biology and Biological Control of Garlic Mustard. Forest Health Technology Enterprise Team, Morgantown, West Virginia. FHTET-2012-05. https://bugwoodcloud.org/resource/files/6249.pdf