Line art illustration of tubercles (raised mounds from which bristles, or hairs, arise) on the top and sides of Lepidoptera (moth and butterfly) larvae. Tubercle characteristics can help to distinguish the species.

Omnivorous leafroller tubercles are chalky white. On the larvae of other common pest leafrollers (Tortricidae), tubercle color is not white and typically is brown, green, or yellowish. Credit: Adapted from Alvah Peterson, Ohio State University — Line art illustration of tubercles (raised mounds from which bristles, or hairs, arise) on the top and sides of Lepidoptera (moth and butterfly) larvae. Tubercle characteristics can help to distinguish the species. Credit: Adapted from Alvah Peterson, Ohio State University