This map depicts the climate range of the blueberry maggot within Southern Ontario, South-western Quebec and the North-eastern United States. Suitable climate occurs from plant hardiness zone 3b to 8b. This map also depicts a cluster of blueberry production facilities in La Route Bleue in Southern Quebec and the Lac St-Jean region. Black dots mark the areas in which blueberry maggot is know to occur. In the U.S., there are a few dots per state from Ohio south to Virginia and east to Maine. The density of the dots increases significantly in South-eastern Maine. In Canada there is a concentration of dots stretching from the London region east to Hamilton and then in Monteregie and in the Atlantic Provinces.