Lesser Peachtree Borer
Head: Black. White to pale yellow stripe across top of head. Back of head black with thick, white to pale yellow fringe on each side, middle black. Eyes have white on inner margin. Nose cone (palpi) black with some yellow on underside.
Antenna: Long, black, reaching past mid abdomen. Males have 2 rows of very short hairs down length of antenna.
Thorax: Black with white stripe down each side of thorax. Two spots, barely separated, sometimes absent at end of thorax. Thorax side has white spot or streak before the wing.
Wings: Both front and hind wing transparent with black margins. The tiny dark mark on hindwing and hindwing margin may be visible through to the front wing. Front wing has narrow black bar at 2/3 wing length (discal cell). Sometimes with small, faint yellow tinted area before wing tip margin. Hindwing has very small mark at mid-wing margin. Fringe black.
Legs: Black, all joints have white scaling, including feet which are striped. Front and middle shin (tibiae) sometimes with heavy white scaling.
Abdomen: Black; longer and narrower than most other Synanthedon. Segment 2 lower margin has white line which does not continue to underside. Segment 4 has wide stripe on underside, visible as a white spot at side edge from the top side. Abdomen tip usually black, but sometimes with a few scattered white hairs; tip squared, but not flared. Female abdomen only slightly wider, otherwise identical to male.
Similar Species: The Peachtree Borer Synanthedon exitiosa male is almost identical, but has yellow tint on hind wings, lacks the white spots on each side of abdominal segment 4 and no white margin around eyes. All other similar species have white on the antenna.
Size: Female 10 to 13 mm. Male 7 to 10 mm long.
Habitat: Orchards and deciduous forests.
Food: Prunus species: Peach, Nectarine, Cherry, Plum. Also Serviceberry Amelanchier. Prefers damaged trees, especially with gummy cankers and black knot galls in the bark.
Flight Time: June to July.
Life Cycle: Males and females emerge in early morning and mate within hours. Females lay clusters of tiny, reddish-brown eggs under the bark of damaged areas of trunk and larger branches. Larvae feed in tunnels; 1st brood develops in 40 to 60 days; 2nd brood over-winters and resumes feeding in spring. Larva 18 mm long. Creamy white with a brown dot at sides of each segment; head yellowish-brown. Cocoons are made of silk and debris near the surface of the bark. Pupa (identical to Synanthedon exitiosa) forms inside the cocoon, and is capable of movement, pushing through the bark surface for the moth to emerge. Day-flying.
Comments: Ontario, Essex County.
For information on synonyms, references and type specimens see next page