Predicted grasshopper development

Grasshopper Simulation Model Output – As of this week, average embryonic development is 62% (59.5% last week).  Development continues to be greatest across Saskatchewan and Alberta (Table 1; Fig. 1).

Table 1. Predicted percent embryonic development of Melanoplus sanguinipes populations at selected sites across the Canadian prairies (as of May 11, 2020).

Figure 1. Grasshopper embryological development (%) based on model simulations using
current environmental conditions (as of May 11, 2020).

Biological and monitoring information related to grasshoppers in field crops is posted by Manitoba Agriculture, Saskatchewan Agriculture, Alberta Agriculture and Forestry, the BC Ministry of Agriculture and the Prairie Pest Monitoring Network (newly updated). Also refer to the grasshopper pages within the "Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide" (Philip et al. 2018) as an English-enhanced or French-enhanced version.