Agrilus curpescens

Rose Stem Girder
Bronze Cane Borer
Agrilus cuprescens

 

Rose Stem Girder Agrilus cuprescens on rose leaf June 19, 2008, Wheatley, Ontario.
Rose Stem Girder Agrilus cuprescens on rose leaf June 19, 2008, Wheatley, Ontario.

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.

Rose Stem Girder Agrilus cuprescens on rose leaf June 19, 2008, Wheatley, Ontario.
Rose Stem Girder Agrilus cuprescens on rose leaf June 19, 2008, Wheatley, Ontario.

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

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