The redhumped caterpillar has four stages of development—egg, larva (caterpillar), pupa, and adult (moth). Moths emerge from pupae in April to May and mate. Each female lays several groups of eggs on host foliage. The eggs hatch into caterpillars that feed on and chew leaves.

The redhumped caterpillar is found throughout the United States and Canada. Though not common in most orchards of the western United States, it is more often seen than the yellownecked caterpillar. In large numbers the caterpillars can severely defoliate trees.

Redhumped caterpillar can be a pest of plum orchards in the Central Valley. Biological control and pruning is often sufficient to manage the pest; use the monitoring guidelines below to determine need for treatment.

The larva is yellow with a red head and is lined longitudinally with orangish, black, and white stripes. Several prominent black tubercles arise from the back, and there is a large reddish hump on top of the first abdominal segment (B).

Oedemasia concinna, the red-humped caterpillar moth or red-humped caterpillar, is a moth of the family Notodontidae. [1] [2] [3] [4] It is found from southern Canada to Florida and Arizona. [1] [2] [3] The wingspan is about 30–35 millimeters (1.2–1.4 in). …

Jan 11, 2018 · We have watched many entire life cycles of monarchs and feel glad to do our part to save them. We looked up these caterpillars on our redbud tree, believing they must be of some beautiful and exotic butterfly. Instead, we have discovered they are the redhumped caterpillar; soon to become moths.

The common name is descriptive of the caterpillar, which has a bright red, slightly raised hump on top of the third body segment, as well as a red head. Behind the red hump there is a series of thin black lines running front to back and narrow yellow bands running along the sides.

Redhumped caterpillars are mainly a problem on young trees where they skeletonize leaves, leaving behind only leaf veins. They do not web leaves. Redhumped caterpillar can be a pest of cherry orchards in the Central Valley but is rarely found in the Central Coast.

Jun 23, 2022 · Caterpillar has bright red head and red hump over segment A1. Striping is variable but includes black, yellow and white pinstripes. Takes up a defensive posture raising the rear end when disturbed.

Red-humped caterpillars develop into a type of prominent moth (Family: Notodontidae) and are sometimes defoliators of ornamental trees and shrubs in their larval stage.