Utah State University Extension
Leafrollers are a type of caterpillar that may roll or tie leaves together to form a protective shelter. They feed on the leaves and fruits of host plants. This fact sheet describes them, the crop injury they cause, their orchard preferences, monitoring, treatment timing, and management.
Alston, Diane G. and Murray, Marion, "Leafrollers in Fruit Orchards (Lepidopters: Tortricidae)" (2017). All Current Publications. Paper 1771.