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How to Manage Pests
UC Pest Management Guidelines
Citrus
Loopers
Scientific Names:
Citrus looper: Anacamptodes fragilaria
Cabbage looper: Trichoplusia ni
(Reviewed 7/03,
updated 7/03)
In this Guideline:
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DESCRIPTION OF THE PESTS
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.
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UC IPM Pest Management Guidelines: Citrus
UC ANR Publication 3441
Insects, Mites, and Snails
E. E. Grafton-Cardwell, Kearney Agricultural Center, Parlier
J. G. Morse, Entomology, UC Riverside
N. V. O’Connell, UC Cooperative Extension, Tulare Co.
P. A. Phillips, UC IPM Program, UC Cooperative Extension, Ventura Co.
C. E. Kallsen, UC Cooperative Extension, Kern Co.
D. R. Haviland, UC Cooperative Extension, Kern Co.
Acknowledgments for contributions to the insect, mite, and snail section:
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
J. Stewart, Pest Management Associates, Exeter, CA
P. Washburn, Washburn & Sons Citrus Pest Control, Riverside, CA
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