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2 results found for: economic development and trade

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

Views: 35
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...


Views: 10
Updated

March 1, 2003

Description

Grasshoppers are a major pest of both cultivated crops and rangeland grasses in the world’s semi-arid regions. Traditionally drier areas like southern Alberta are more prone to recurring problems, but serious grasshopper infestations can occur in cropland throughout the province. Although the...