Pest profile

Oriental Fruit Moth

Grapholita molesta (iNaturalist: Aspila molesta) · Lepidoptera: Tortricidae[2]

Oriental fruit moth larvae kill peach and nectarine shoot tips in spring, and later generations bore into the fruit around the pit.[1]

Oriental fruit moth adult, a small mottled gray-brown moth with whitish flecks, resting on a pale surface
Oriental fruit moth adult, a small mottled gray-brown moth with whitish flecks, resting on a pale surface. Photo: Chrissy McClarren and Andy Reago, public domain (CC0), via iNaturalist

How to identify it

  • Larvae are orangish, pale yellow, pink or whitish with a brown head and grow to about 2/3 inch.[1]
  • Under a hand lens, a comb of short stiff bristles on the underside of the last segment sets it apart from other fruit-boring larvae.[1]
  • Adults are about 1/2 inch long, dark brown or gray with whitish mottling, and fly around twilight.[1]

Look-alikes

Look-alikeHow to tell them apart
Peach twig borerIts shoot damage looks identical; check the larva for the anal comb.[1]
Codling mothDamage to fruit and nuts looks the same; only oriental fruit moth larvae have the anal comb.[1]

Where it lives

It attacks almonds and stone fruits; nectarines and peaches are especially susceptible.[1]

US map: public records from 14 states since 1990 (GBIF).

Biology and life cycle

Mature larvae overwinter in cocoons on the tree or in litter at its base.[1]

Adults emerge in February or early March; early larvae tunnel in shoot tips, later ones in fruit and nuts.[1]

There are five or six generations a year in California.[1]

Damage and signs

  • Tunneled shoot tips wilt and die back an inch or more (flagging); healthy trees tolerate it.[1]
  • The important damage is later larvae tunneling to the center of green or ripening fruit and nuts.[1]

Health risk

It feeds on fruit trees only; UC IPM mentions no risk to people.[1]

Control

Prevention

Avoid persistent broad-spectrum insecticides; effective sprays are for professionals, and mating disruption rarely works on one or a few trees.[1]

Biological control

The wasp Macrocentrus ancylivorus commonly parasitizes 80 to 90 percent of larvae by late summer on unsprayed trees.[1]

A small, unharvested sunflower patch planted in April and late May gives that wasp an overwintering host.[1]

Common questions

Why are my peach shoot tips wilting in spring?
Oriental fruit moth or peach twig borer larvae tunneling in the tips cause this flagging.[1]
Can I spray oriental fruit moth myself?
Effective products are available only to professional applicators; biological control is the backyard approach.[1]

Sources

  1. University of California Statewide IPM Program, “Oriental Fruit Moth (Pests in Gardens and Landscapes).” ipm.ucanr.edu/PMG/GARDEN/FRUIT/PESTS/orientfrmoth.html (accessed 2026-10-06)
  2. iNaturalist, “Aspila molesta taxon page (order and family).” www.inaturalist.org/taxa/1507298 (accessed 2026-10-06)

Updated 2026-10-14. Built from sourced records. Spot an error? Tell us.