How to Manage Pests

UC Pest Management Guidelines

Citrus

Loopers

Scientific Names:
Citrus looper: Anacamptodes fragilaria
Cabbage looper: Trichoplusia ni

(Reviewed 9/08, updated 9/08)

In this Guideline:


Description of the Pest

Loopers occur in most citrus-growing areas, usually together with other orangeworms. The larvae have no prolegs in the middle of the body and therefore move in a characteristic looping or measuring fashion. The female moth lays about 100 pale green, spherical eggs singly on leaves; there are several generations a year.

Damage

Looper larvae mainly consume new growth flushes, but also feed on blossoms and young fruit; they rarely damage mature fruit. Very young larvae typically feed on lower leaf surfaces along the leaf margin. Mature larvae, which are about 1.5 inch (3.7 cm) long, eat holes in leaves or consume them entirely.

Management

Loopers have many natural enemies, including Apanteles sp. Treatment for loopers on citrus is rarely required.

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Citrus
UC ANR Publication 3441

Insects, Mites, and Snails

  • E. E. Grafton-Cardwell, Entomology, UC Riverside and Kearney Agricultural Center, Parlier
  • J. G. Morse, Entomology, UC Riverside
  • N. V. O'Connell, UC Cooperative Extension, Tulare County
  • P. A. Phillips (emeritus), UC IPM Program, UC Cooperative Extension, Ventura County
  • C. E. Kallsen, UC Cooperative Extension, Kern County
  • D. R. Haviland, UC Cooperative Extension, Kern County
Acknowledgments for contributions to Insect, Mites, and Snails:
  • J. Barcinas, E.S.I., Corona, CA
  • R. Dunn, Badger Farming Co., Exeter, CA
  • J. Gorden, Pest Management Associates, Exeter, CA
  • H. Griffiths, E.S.I., Corona, CA
  • D. Machlitt, Consulting Entomology Services, Moorpark, CA
  • C. Musgrove, retired entomologist, Riverside, CA
  • K. Olsen, S & J Ranch, Pinedale, CA
  • T. Roberts, E.S.I., Corona, CA
  • T. Shea, UC Cooperative Extension, Riverside County
  • J. Stewart, Pest Management Associates, Exeter, CA
  • P. Washburn, Washburn & Sons Citrus Pest Control, Riverside, CA

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