Weekly Update 2025
Released June 20, 2025 ( Week 7 )
Welcome to Week 7 for the 2025 growing season! This week includes:• Weather synopsis• Predicted grasshopper development • Predicted bertha armyworm development• Diamondback moth• Wheat midge• Cabbage seedpod weevil• Lygus bug...
Weather synopsis ( Week 7 )
The seven-day average temperature across most of the Prairie growing region was above 14 °C last week (June 9 – June 15, 2025) (Fig.1). Southeastern Alberta and southwestern Saskatchewan experienced the warmest average temperatures between June...
Predicted Grasshopper Development ( Week 7 )
The grasshopper model was developed for the migratory grasshopper, but closely represents the development of the other primary pest grasshopper species found in the prairie region. The model uses weather from the current growing season to estimate...
Predicted bertha armyworm development ( Week 7 )
The phenology model for bertha armyworm development on the Canadian prairies was developed by Ross Weiss and Owen Olfert. Model simulations were used to estimate development of bertha armyworm as of June 15, 2025. The model indicates that in...
Diamondback moth ( Week 7 )
Diamondback moths (DBM; Plutella xylostella) are a migratory invasive species. Each spring, adult populations migrate northward to the Canadian prairies on wind currents from infested regions in the southern or western U.S.A. Upon arrival to the...
