January 1, 2014
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...
March 1, 2003
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...
January 1, 2001
This field guide was prepared to enable growers of seed alfalfa to quickly identify their pest and beneficial insects. The important distinguishing features are indicated on the plates by arrows. These features can be readily seen with a hand lens or magnifying glass. Economic thresholds are...