Thursday, 26 May 2016

Weekly Update (May 25, 2016; Wk 04) - Predicted Grasshopper Development

Grasshoppers (Acrididae) – This past week, cooler conditions in Alberta slowed egg development while warmer conditions in Saskatchewan enhanced development. 

For the week of May 23, 2016, the predicted mean embryological development was 85% compared to 75% for the previous week. These results suggest that grasshopper hatch will rapidly progress over the next week to ten days

The model predicted that 13% of the hatch is complete (compared to last week’s value of 5%). Peak hatch (approx. 30%) was predicted to occur between Saskatoon and Regina.

Biological and monitoring information related to grasshoppers in field crops is posted by the provinces of ManitobaSaskatchewanAlbertaBritish Columbia and the Prairie Pest Monitoring Network.  Also refer to the grasshopper pages within the new "Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide" - both English-enhanced or French-enhanced versions are available.