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6 results found for: economic development and trade

Publication Type: Fact Sheet Tags: pests

Views: 12
Last Modified

January 1, 2014

Description

Many economic thresholds for insects attacking oilseed crops currently in use are nominal (i.e. unsupported by research). Some economic thresholds have been developed for major pests attacking crops in Western Canada. The following data have been compiled from various sources, including the...


Views: 16
Last Modified

January 1, 2002

Description

Mice are a large group of mammals, with more than 130 species found worldwide. In Alberta, there are seven species of mice and 12 species of voles. The most troublesome and economically important of the species found in Alberta are the house mouse, the whitefooted mouse and the meadow vole...


Views: 34
Last Modified

July 1, 2005

Description

Orchards, nurseries, shelterbelts and gardens can suffer economic losses and aesthetic damage because of gnawing animals. Most damage occurs from late fall until early spring when extreme weather conditions limit the available food supply. Plant damage can also be extensive during periods of...


Views: 33
Last Modified

January 1, 1991

Description

The warble is a major economic pest of cattle in Alberta. Warble grubs, which are the larval stage of the "heelfly," spend over nine months in cattle as internal parasites. During this period they damage the meat and hide of infested animals and are responsible for reduced milk production in...


Views: 26
Last Modified

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
Last Modified

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...