Weekly Update 2025
Released July 25, 2025 ( Week 12 )
Welcome to Week 12 for the 2025 growing season! This week includes:• Weather synopsis • Bertha armyworm • Predicted diamondback moth development • Predicted wheat midge development• Predicted grasshopper development • Lygus bug...
Weather synopsis ( Week 12 )
Over the past week (July 14-20, 2025), the average temperature across the Canadian prairies was ~15 °C and slightly cooler compared to long-term climate normal (Fig. 1). Over the last 30 days, eastern Manitoba was the warmest and the Peace River...
Bertha armyworm ( Week 12 )
The phenology model for bertha armyworm development on the Canadian prairies was developed by Ross Weiss and Owen Olfert. Model simulations used to estimate development of bertha armyworm are now complete for the 2025 growing season. Now, in-field...
Predicted diamondback moth development ( Week 12 )
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...
Predicted wheat midge development ( Week 12 )
The emergence of wheat midge (Sitodiplosis mosellana) needs to be synchronized with the development of wheat heads for successful larval development. One factor that determines the timing of adult wheat midge emergence is spring precipitation....
