Rose Stem Girder
Bronze Cane Borer
Identification: Introduced into the USA, “Illustrations of North American Entomology” by Glover, 1878. (misidentified as A. fagi, figure, no text).
Head: Wide, reddish-bronze. Male has some greenish on lower face. Indented line from top of head to mouth barely visible, if at all.
Antenna: Light golden-bronze. Segments steak-knife-like from 4th to tip.
Thorax (Pronotum): Reddish-bronze. Base margin wraps around side of head, smooth and even. Side margins slant upward to wing base, a slight shelf along edge. Lower margin wavy. Underside reddish-bronze, shiny; male has long hair on underside.
Wings (Elytra): Reddish-bronze; slightly wider than thorax. Sides waved with a wide shelf about mid-wing, same color as wing. Tips separated, widely rounded. Center of base margin (scutellum) oblong from side to side (transverse), usually somewhat lighter in color.
Legs: Reddish-bronze, feet somewhat darker.
Abdomen: Reddish-bronze; tip blunt, rounded.
Size: 4 to 6 mm.
Habitat: Forest edges, meadows, field edges, gardens.
Food: Rose Rosa and Dewberry Rubus
Flight Time: May to July
Life Cycle: Larvae cause galls or abnormal swellings on the stems of roses Rosa and Dewberry, Blackberry, Raspberry Rubus.
Comments: Essex County – Lake Erie Islands, Point Pelee and Ojibway Prairies. Kent County Rondeau Provincial Park. Bruce Peninsula.
For information on synonyms, references and type specimens see next page