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Western Cherry Fruit Fly
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Wing of western cherry fruit fly showing distinctive wing markings |
Sweet cherry infested with western cherry fruit fly larvae |
Life Cycle: Overwinter as pupae in the soil under host. Adults are present June - early August; eggs are laid in fruit and larvae emerge from the fruit 2-3 weeks later (July-August), drop to the ground and pupate in the soil. One generation per year.
Monitoring: Suspend yellow sticky tapes baited with ammonium carbonate attractant within lower canopy of trees by end of May.
Hosts: Cherry.
Comments: Adult cherry fruit flies closely resemble other species of fruit flies that attack domestic and wild fruit. The black cherry fruit fly, Rhagoletis fausta (Osten Sacken) occasionally attacks cherry. Western cherry fruit flies have distinctive wing markings (black fork at tip and a very small clear spot on the upper edge). Larvae of cherry fruit flies are maggots (white, legless, no distinct head, tapered body) whereas cherry fruitworm larvae are caterpillars (white to pink body, black legs and dark head). The presence of frass at the feeding site is also a sign of cherry fruitworm feeding.
Body length: Adult - 4.0mm; Mature larva - 6.0mm
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