Weekly Update 2025
Released July 4, 2025 ( Week 9 )
Welcome to Week 9 for the 2025 growing season! This week includes:• Weather synopsis• Predicted wheat midge development• Predicted grasshopper development • Cabbage seedpod weevil • Lygus bug monitoring • Aphids in field crops•...
Weather synopsis ( Week 9 )
The seven-day average temperature across the Prairie growing region was slightly above 15 °C between June 23 and June 29, which is slightly above the long-term climate normal (Fig. 1). The southwest corner of Manitoba experienced the warmest...
Predicted wheat midge development ( Week 9 )
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....
Predicted Grasshopper Development ( Week 9 )
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...
Cabbage seedpod weevil ( Week 9 )
There is one generation of cabbage seedpod weevil (CSPW; Ceutorhynchus obstrictus) per year. The overwintered adult is an ash-grey weevil measuring 3-4mm long (Fig. 1; left photo). Mating and oviposition are quickly followed by eggs hatching...
