|Figure 1. Predicted percent of bertha armyworm (Mamestra configurata) population at pupal stage as of June 21, 2020.|
|Figure 2. Predicted percent of bertha armyworm (Mamestra configurata) population at adult stage as of June 21, 2020.|
|Figure 3. Predicted percent of bertha armyworm (Mamestra configurata) population at egg stage as of June 21, 2020.|
The BAW model was run until June 30, 2020 to project developmental status. The simulations for Saskatoon (Fig. 4) and Brandon (Fig. 5) indicate that first occurrence of BAW larvae may begin later next week.
|Figure 4. Projected bertha armyworm (Mamestra configurata) phenology at Saskatoon SK as of June 30, 2020.|
|Figure 5. Projected bertha armyworm (Mamestra configurata) phenology at Brandon MB as of June 30, 2020.|
Weekly Pheromone-baited Trapping Results - Early season detection of bertha armyworm is improved through the use of pheromone-baited unitraps traps deployed in fields across the Canadian prairies. Click each province to access moth reporting numbers observed in Alberta, Saskatchewan and Manitoba as they become available. Check these sites to assess cumulative counts and relative risk in your geographic region.
Biological and monitoring information related to bertha armyworm in field crops is posted by the provinces of Manitoba, Saskatchewan, Alberta and the Prairie Pest Monitoring Network. Also refer to the bertha armyworm pages within the "Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide" which is a free downloadable document as both an English-enhanced or French-enhanced version.
Refer to the PPMN Bertha armyworm monitoring protocol for help when performing in-field scouting. Use the images below (Fig. 6) to help identify egg masses and the economically important larvae in canola. Review the 2019 Insect of the Week which featured bertha armyworm and its doppelganger, the clover cutworm!