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Economic thresholds for insects attacking oilseeds

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... More ≫

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 guidelines published by the Western Committee on Crop Pests, and indicate the economic threshold recommendations being made.

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Insects associated with alfalfa seed production

Description

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.... More ≫

Description

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 based on the average number of insects captured in five 90° sweeps.

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Grasshopper management

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,... More ≫

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 majority of grasshopper damage has been to cereal grains, other crops can be seriously affected. This fact sheet provides information on significant species of grasshoppers in Alberta, including each specie’s significant food supply. Information is also provide on grasshopper control and the economic threshold at which control measures become viable.

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