Common NameOblique-banded leafrollerSeasonalityAdult flight from early June through August; 2nd flight can occur in mid to late August.IdentificationLarvae dark green or brown with brown to black head at maturity. Pupa dark, reddish brown and usually found in folded leaves. Adults brownish red with darker, oblique band across center of forewing (Furniss & Carolin 1977). Wingspread approx 25 mm. Hind wing light in color with fringe along posterior edge.
Scientific NameChoristoneura rosaceanaCommon Name
Oblique-banded leafroller
Habitat
Deciduous woodlands.
Seasonality
Adult flight from early June through August; 2nd flight can occur in mid to late August.
Identification
Larvae dark green or brown with brown to black head at maturity. Pupa dark, reddish brown and usually found in folded leaves. Adults brownish red with darker, oblique band across center of forewing (Furniss & Carolin…
Larvae dark green or brown with brown to black head at maturity. Pupa dark, reddish brown and usually found in folded leaves. Adults brownish red with darker, oblique band across center of forewing (Furniss & Carolin 1977). Wingspread approx 25 mm. Hind wing light in color with fringe along posterior edge.
Life History
Adults emerge in mid to late June and eggs are laid shortly thereafter. Larvae emerge in approximately 2 weeks and typically disperse on silken threads. Larvae start feeding and then either enter diapause in a…
Adults emerge in mid to late June and eggs are laid shortly thereafter. Larvae emerge in approximately 2 weeks and typically disperse on silken threads. Larvae start feeding and then either enter diapause in a sheltered place in second or third instar or continue development for a second generation. If second generation is produced, the larvae enter diapause and hibernate in second or third instar. Larvae emerge after leaf-flush in the spring and start feeding again. On fruit trees, the larvae feed on floral parts within bud clusters, continue feeding on flowers during bloom, and eventually feed on fruit and expanding leaves. Larvae typically pupate after sixth larval instar. Populations vary from mostly producing one generation per year in northern climates to mostly producing two generations per year in southern, warmer climates (EPPO 2004, Hunter & McNeil 1997, Hunter & McNeil 2000).
Conservation
Not of concern.
Diet Info
Polyphagous, but prefers hosts from the Rosaceae family. It is considered a pest in apple, pear, and peach orchards. It also occurs on soft fruits such as blueberries and raspberries, on ornamental shrubs, on a wide…
Polyphagous, but prefers hosts from the Rosaceae family. It is considered a pest in apple, pear, and peach orchards. It also occurs on soft fruits such as blueberries and raspberries, on ornamental shrubs, on a wide variety of other deciduous tree species (EPPO 2004), and has occasionally been found feeding on pines (Otvos 1991).
Range
Widely distributed species in temperate North America. Most commonly found in the West at low elevations except the arid Southwest (EPPO, Furniss & Carolin 1977).
Citation
Page Citation for Choristoneura rosaceana
Page Citation
"Species Details - Choristoneura rosaceana, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-5273. Accessed 18 Apr. 2025.
References
AuthorNorthern Prairie Wildlife Research Centre.
TitleCaterpillars of Pacific Northwest Forests and Woodlands: Choristoneura rosaceana (Tortricidae).
Publication Date2004
AuthorHunter, M. D., and J. N. McNeil
TitleGeographic and parental influences on diapause by a polyphagous insect herbivore.
Publication Date2000
Series TitleAgricultural and Forest Entomology
Volume2
Pages49-55
AuthorHunter, M. D., and J. N. McNeil
TitleHost-plant quality influences diapause and voltinism in a polyphagous insect herbivore.
Publication Date1997
Series TitleEcology
Volume78
Pages977-986
AuthorOtvos, I. S.
TitleNorth American Species in Forestry.
Publication Date1991
Pages719-756
AuthorEuropean and Mediterranean Plant Protection Organization (EPPO).
TitlePlant Quarantine Data Retrieval System.
Publication Date2004
AuthorFurniss, R. L., and V. M. Carolin
TitleWestern Forest Insects.
Publication Date1977
Pages172-173
Specimen Information
There are 149 specimens of this Species.
149 results plotted on map in 38 markers. Note: Only records with latitude and longitude coordinates are plotted on map.