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Prairie Pest Update #9 (Jul 04, 2014)
Cabbage seedpod weevil, diamondback moth, wheat midge, swede midge and more
Abbreviated Weekly Update – Staff are busy performing surveys this week.
Wheat Midge (Sitodiplosis mosellana) – This week modelling includes wheat midge in order to facilitate monitoring across the prairies. The map below predicts the geographic distribution and corresponding accumulation of heat units necessary for wheat midge to emerge from puparia developing in the soil.
When monitoring wheat fields, be particularly watchful for the synchrony between flying midge and anthesis. Additional wheat midge biology and monitoring information can be located by clicking here or linking to your provincial fact sheet (Saskatchewan Agriculture, Alberta Agriculture and Rural Development). More information related to wheat midge on the Canadian prairies was published by Elliott, Olfert, and Hartley in 2011.
As the growing season progresses, areas highlighted yellow, orange, then red predict regions which have accumulated sufficient heat units for wheat midge adults to begin to emerge (Fig. 1) based modelling. Those of you monitoring wheat midge using pheromone traps will need to have traps in place within areas of the map highlighted green (i.e., 500-600 DD) and turquoise
July 3, 2014 - Prairie Pest Monitoring Weekly Update
Source: Alberta Canola Producers Commission
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