Choristoneura parallela

Type

Native

Taxonomy

Choristoneura parallela (Robinson) (Tortricidae: Tortricinae: Archipini)

Common names: parallel-banded leafroller moth, spotted fireworm

Adult Recognition

FWLFWL:
forewing length; the distance from the base of the forewing to the apex, including fringe
: 8.5-11.0 mm (males); 11.0-12.0 mm (females)

Head and thorax red-orange to brown; forewing with costacosta:
the anterior margin of each wing
concave, ground color red-orange to pale brown; fasciaefascia:
a dark transverse band on the forewing
well-developed, distinct, brown, often with strong red or purple shading, especially in females; males without forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
; hindwing pale brown to orange.

Male genitalia are characterized by a large, broad angular process on the ventralventral:
lower, to the bottom, on the under side
margin of the sacculussacculus:
the ventral margin of the male valva
at two-thirds length (Dang 1992Dang 1992:
Dang, P. T. 1992. Morphological study of male genitalia with phylogenetic inference of Choristoneura Lederer (Lepidoptera: Tortricidae). Canadian Entomologist. 124: 7-48.
). Female genitalia are characterized by a long, thin ductus bursae and a large, hook-like signumsignum:
a sclerotized projection or patch on the interior of the corpus bursae

Larval Morphology

The following account is summarized from MacKay (1962a).

Mature larva 19-25 mm in length; width of head 1.6-1.8 mm; head orange; prothoracic shieldprothoracic shield:
a sclerotized plate on the dorsal surface of the prothorax
orange, black on posteriorposterior:
after, to the rear, toward anal end
, anteromedial, and anterolateral margins; legs black; body dark green, pinaculapinaculum:
flattened sclerotized plates on a caterpillar that bear the setae
 creamy white; prolegs yellow; anal fork well-developed; SV group on A1, 2, 7, 8, 9 numbering 3:3:3:2:2.

Detailed figures of of larval chaetotaxychaetotaxy:
the arrangement of setae (in reference to Lepidoptera larvae), often depicted on a "setal map"
are available in MacKay (1962a).

Similar Species

Choristoneura parallela is very similar to several other species of Choristoneura, especially C. rosaceana and C. obsoletana. Males of C. parallela lack a forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
and sinuous costal margincostal margin:
see costa
, both of which are present in C. rosaceana. The fasciaefascia:
a dark transverse band on the forewing
are much more well-defined in C. parallela than in C. obsoletana.

Biology

The following account is summarized from Stuart & Polavarapu (1998).

In New Jersey, two generations occur per year, with adults eclosing in early June and again in early August. Egg masses are laid in clusters of up to 350 eggs on the surface of leaves of the host plant. Larvae web leaves together and feed on both leaves and fruit of the plant. Overwintering occurs as second instar larvae. C. parallela is most well-known for being a pest of cranberries (Vaccinium macrocarpon). Females rarely oviposit on cranberry and only reach this host by ballooning. Eggs and/or larvae of this species have been recorded from 23 plant species in 19 different families.

Host plant Host plant family Reference(s)
Acer rubrum Aceraceae Stuart & Polavarapu 1998
Sagittaria latifolia Alismataceae Stuart & Polavarapu 1998
Gerbera jamesonii Asteraceae Anonymous 1983Anonymous 1983:
Anonymous 1983. Bureau of Entomology. Tri-ology. 22(10): 5-7.
Solidago sp. Asteraceae Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
Clethra alnifolia Clethraceae Stuart & Polavarapu 1998
Hypericum perforatum Clusiaceae Sandberg & Passoa 1989
Chamaedaphne calyculata Ericaceae Stuart & Polavarapu 1998
Kalmia sp.  Ericaceae Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
; Stuart & Polavarapu 1998
Vaccinium macrocarpon Ericaceae Stuart & Polavarapu 1998
Vaccinium sp. Ericaceae Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
Phaseolus sp. Fabaceae MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
; Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
Hypericum virginicum Hypericaceae Stuart & Polavarapu 1998
Myrica sp. Myricaceae McDunnough 1933aMcDunnough 1933a:
McDunnough, J. 1933a. Notes on the biology of certain tortricid species with structural details of the larvae and pupae. Canadian Journal of Research. 9: 502-517.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
; Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; LACM IndexLACM Index:
LACM Index. Records from the card file at the Los Angeles County Museum of Natural History, Los Angeles, California; transcribed by Gaeden Robinson (BMNH).
[unspecified] Poaceae Stuart & Polavarapu 1998
[unspecified] Polypodiaceae Stuart & Polavarapu 1998
Lysimachia terrestris Primulaceae Stuart & Polavarapu 1998
Rosa sp. Rosaceae Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
Gardenia sp. Rubiaceae MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
; Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
Citrus sp. Rutaceae Freeman 1958Freeman 1958:
Freeman, T. N. 1958. The Archipinae of North America (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 7 (Vol. 90): 1-89.
; MacKay 1962aMacKay 1962a:
MacKay, M. R. 1962a. Larvae of the North American Tortricinae (Lepidoptera: Tortricidae). Canadian Entomologist, Supplement 28: 1-182.
Salix humilis var. tristis Host plant table (embedded)

View full screen host table here

Distribution

Choristoneura parallela is widespread in eastern North America, ranging as far north as Wisconsin, southern Ontario, and Vermont and as far south as Florida and eastern Texas. Records in the literature from California are dubious and require verification.

Links

Additional photos and a distribution map of this species in North America are available at Moth Photographers Group
 Male . ©  Loren Jones. Image used with permission.
Male. © Loren Jones. Image used with permission.
 Female . ©  Loren Jones. Image used with permission.
Female. © Loren Jones. Image used with permission.