How to Manage Pests

Pests in Gardens and Landscapes

Amorbia—Amorbia cuneana

Amorbia larvae are green caterpillars about 0.75 to 1 inch long when full grown. A black stripe on the side of the head and the segment behind distinguishes them from other caterpillars.

Identification of species | Life cycle

Damage

Larvae feed on new growth flushes, often rolling or skeletonizing the leaves or tying leaves to fruit with webbing. Fruit may be scarred. In citrus, feeding on fruit occurs at petal fall. Larvae feed on the peel of young or maturing fruit under the calyx. Damaged fruit often decays at the feeding site.

Solutions

Look for webbing and leaf rolls in young foliage and feeding damage on young and mature fruit on the outside canopy. Hand remove leafrollers and egg masses. Various natural enemies attack egg, larval, and pupal stages of amorbia. Applications of Bacillus thuringiensis or spinosad may be needed.

Amorbia larva
Amorbia larva
Leaves tied to fruit
Leaves tied to fruit
Damage to avocado
Damage to avocado


Statewide IPM Program, Agriculture and Natural Resources, University of California
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