New February 2003
Printer-friendly version
Download
a free PDF of this guide.
Contents
Caterpillars
Royal moths and silkworm moths
Hornworms
Swallowtails
Tussock moths
Tiger moths
Slug caterpillars
Puss caterpillars
Cutworms, armyworms, underwings and dagger moths
Whites and sulphurs
Tent caterpillars
Brush-footed butterflies, fritillaries and wood nymphs
Prominents and oakworms
Loopers and cankerworms
Milkweed butterflies
Skippers
Bagworms
Snout and grass moths
Sawflies
Related pages
Use our feedback form to ask questions or make comments about IPM1019.
Publication search
Caterpillars in Your Yard and Garden

Hackberry emperor caterpillars (Asterocampa celtis) are present from early summer to fall. They produce two generations per year.
Full-grown caterpillars are one to 1.5 inches long. The body is yellow to green with longitudinal to oblique white-yellow stripes on the sides of most body segments. Two barbed horns arise from the green head and a pair of pointed projections from the end of the body. From the base of each horn and running the length of the granulose body to the abdominal tips is a white-yellow line bordered by shades of dark green. Between these parallel lines in the center of the back is an inconspicuous yellow line. The host plant is hackberry (occasionally a serious pest).
About the family
Brush-footed butterflies, fritillaries and wood nymphs belong to the Nymphalidae family. Caterpillars have variable color patterns ranging from longitudinal stripes to mimicking a bird dropping. Most species are covered with prominent spines and tubercles.
IPM1019, new February 2003