Eucosma sonomana, the western pineshoot borer, is a moth of the family Tortricidae. It is found in western North America.

Eucosma sonomana
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Tortricidae
Genus: Eucosma
Species:
E. sonomana
Binomial name
Eucosma sonomana
Kearfott, 1907
Larva
Damage

The wingspan is 16–22 mm. Adults are on wing for two to three months during the spring. There is one generation per year.

Larvae feed on pine species and is considered a pest on Pinus ponderosa. They mine the pith of terminal shoots.

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