Canada

Obliquebanded leafroller (oblique banded leafroller)

Choristoneura rosaceana

The spring flight of OBLR adults begins about 3 to 4 weeks after petal fall on apples, and continues for 3 to 4 weeks. In areas where the OBLR has 2 generations, a second flight occurs from early August through early September. OBLR adults are 9 to 12 mm in length and have a wingspan of 20 to 27 mm. The hind wings, which are not visible when the moth is at rest, are pale yellow. After emergence, females have a 24 hr preoviposition period. They then begin laying egg masses that gradually diminish in size with each succeeding egg mass laid. A female is capable of laying up to 900 eggs during her 7 to 8 day oviposition period.