The latest Prairie wind trajectory cereal rust risk report is available for download now at the following link: June 21-27, 2023 report.
As of the period of June 21-27, 2023 the overall Prairie cereal rust risk assessment and need for in-crop scouting is as follows:
Pacific Northwest – There
was moderate number of reverse wind trajectories that passed over the PNW
region and into the Prairies. Rainfall
has recently occurred especially in central Alberta to the south Peace River
region, as well as some areas of southeastern
Saskatchewan and Manitoba. However,
given limited stripe rust development in the PNW, as of June 27, 2023 the
risk of stripe rust appearance from the PNW is low and scouting for this
disease in the Prairie region is generally not urgent.
Kansas-Nebraska corridor – Given
a very low number of wind trajectories from this region and generally low rust
levels in commercial fields in this corridor, as of June 27, 2023 the risk
of stem, leaf, stripe, and crown rust appearance from the Kansas-Nebraska
corridor is generally low and scouting for these diseases in the Prairies is
not urgent. Recent
reports in mid-late June of stripe, leaf and stem rust in Kansas and Nebraska,
and a recent report of stem rust in South Dakota may represent somewhat of a
concern. However, the number of trajectories was reduced for June 21-27, although
rainfall did occur in southeastern Saskatchewan and Manitoba. Farmers and consultants in the central-eastern
Prairies should
consider keeping an eye out for stripe and stem rust development, especially in
fields planted to susceptible varieties.
