Obliquebanded/Threelined Leafroller
Choristoneura rosaceana (Harris) / Pandemis limitata (Robinson)

Life Cycle: Threelined and obliquebanded leafrollers overwinter as larvae on hosts. A summer generation is present from mid June to early August; the second larval generation (overwintering larvae) appears in September. Moths are present June-July and again late August-October.

Monitoring: Pheromones are available to monitor male moths. From pink through bloom inspect bud clusters and leaves for larvae or their damage. Summer generation larvae feed on terminal leaves, under leaves tied onto fruit, or between touching fruit.

Hosts: Fruit trees, various trees and shrubs.

Comments: Larvae of these two species can have either a brown or black head and segment behind the head. They can be distinguished from the one-generation leafroller larvae in the spring by their larger size, having overwintered as larvae, not eggs. Leafroller larvae found in July through September are of the two-generation species. Fruit damage caused in the spring resembles that of single-generation leafrollers and of fruitworms.

Body length: Adult - 15.0mm; Mature larva - 24.0mm