Oriental Fruit Moth

Grapholita molesta

Insectalso: OFM, Oriental peach moth

A small moth whose caterpillars first bore into tender shoot tips and later tunnel into the fruit of peach, nectarine, and other stone fruit, making them a leading wormy-fruit pest of orchards. With several overlapping generations a year, it can wilt shoots in spring and ruin fruit at harvest.

🔎 How to spot it

The adult is a small gray-brown moth with a wingspan of about half an inch and mottled wings that blend into bark. The caterpillar is pinkish-white with a brown head, up to about half an inch long, and is best told from the codling moth larva by the small dark comb on the tip of its last segment. Early damage shows as wilted, dying shoot tips, while later the fruit hides the larva inside.

🥀 Damage it causes

The first generations bore into the soft growing tips, killing them so the shoots wilt and bend over in a shepherds-crook, which stunts young trees and shapes growth. Later generations tunnel into the fruit, often entering at the stem end and feeding around the pit, leaving gummy holes and brown frass and a worm in the fruit at harvest. A few percent shoot strike can become heavy fruit infestation if generations build unchecked.

🛡️ Prevent it

Prune out and destroy wilted, infested shoot tips through the season to remove larvae before they mature, and clean up dropped and culled fruit. Keep an eye on nearby unmanaged stone fruit, which seeds infestations. In small plantings, mating-disruption dispensers that confuse the males can lower fruit damage where enough trees are grown together.

🧯 If it is already here

Time any sprays with pheromone traps and a degree-day model rather than spraying blindly, since the moth has multiple generations and treatment must hit the egg-hatch window; the naturally derived spinosad and Bacillus thuringiensis are options for the home orchard. Mating disruption and the orchard sanitation of removing strikes and drops are the backbone of low-spray control. Bagging individual fruit protects a few prized peaches.

💡 Good to know

Oriental fruit moth is easily confused with codling moth, but its early attack on shoot tips, the shepherds-crook wilting, and the anal comb on the larva distinguish it. Because it overwinters in ground litter and bark crevices, fall cleanup reduces the next year first flight. Trapping to time treatment is what separates effective control from wasted sprays.