Apple maggot fly detected in British Columbia

A single apple maggot fly (Rhagoletis pomonella) was detected by the Canadian Food Inspection Agency (CFIA) in British Columbia on September 8, 2015.

The apple maggot is a primary pest of cultivated apples, especially in the northeastern United States and southeastern Canada.

Adults: The adult fly is about 4–5 mm, or slightly smaller than a house fly (6–7 mm). It is black in color, with white bands on the abdomen (four on the female and three on the male), and the wings are marked with four oblique black bands (Image 1).

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Image 1. Adult apple maggot fly, Rhagoletis pomonella (Walsh), dorsal view. Photograph by Joseph Berger; insectimages.org, #5402799

Larvae: The larvae are white or yellowish tapered maggots slightly smaller than those of the house fly (Image 2).

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Image 2. Larva within a plum fruit. Photo credit: Whitney Cranshaw, Bugwood.org, #5506402

 

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