Grasshoppers are expected to be a problem in east-central Alberta and western Saskatchewan this year.
Producers are advised to monitor fields and roadsides.
The economic thresholds for control are reached when hopper numbers exceed 13 per sq. metre in the field and 25 per sq. m in the roadside.
However, thresholds are reduced when plants are under drought stress and are unable to compensate for feeding injury. Control may then be required at lower levels – seven to 12 hoppers in the field, and 13 to 24 in the roadside ditches.
