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1 result found for: economic development and trade

Topics: Agriculture Organizations: Agriculture, Food, and Rural Development (1992-2006) Tags: pests animal parasites

Views: 38
Updated

January 1, 1993

Description

Black flies, which number about 100 species in Canada, occur in varying abundance in all parts of the country. Adult females feed on blood, causing irritation and discomfort to humans, domestic and wild mammals and birds. Apart from the annoyance and discomfort, black flies cause economic losses...