How to Manage Pests
Pests in Gardens and Landscapes
and confirmation—Green fruitworm
At least ten species of relatively large green caterpillars can be included in the green fruitworm group;
the most important in California are the speckled green fruitworm, Orthosia hibisci, and the humped
green fruitworm, Amphipyra pyramidoides. Youngest larvae feed during the day whereas older larvae
feed at night and hide during the day. Small larvae are difficult to distinguish from other small green
caterpillars. Mature larvae of the speckled green fruitworm have cream-colored lines down the back and
sides of their bodies. Humped green fruitworms have a prominent hump on the tail end of their body and
bright yellow and white stripes down their backs.
Don't confuse green fruitworms with sawfly larvae. Fruitworms have only five pairs of prolegs instead
of one on every abdominal segment, as sawfly larvae do.
pear sawfly larva