The latest Prairie wind trajectory cereal rust risk report is available for download now at the following link: May 24-31, 2023 report.
As of the period of May 24-31, 2023 the overall Prairie cereal rust risk assessment and need for in-crop scouting is as follows:
Pacific Northwest – Even
though there were a number of reverse wind trajectories that passed over the
PNW region and into the Prairies, given limited stripe rust development in the
PNW, generally dry Prairie conditions, and relatively early stages of Prairie crop
development, as of May 31, 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.
Texas-Oklahoma corridor –
Given limited leaf, stem, stripe and crown rust development in this corridor, generally
dry Prairie conditions and early stages of Prairie crop development, as of May 31, 2023 the risk of stem, leaf,
stripe, and crown rust appearance from the Texas-Oklahoma corridor is generally
limited and scouting for these diseases in the Prairie region is not urgent. From May 24-31, 2023 there
were an increased number of trajectories from the Texas to Oklahoma region to
Manitoba and eastern Saskatchewan. However,
with limited rust development in the Texas to Oklahoma region there is likely
limited risk for the eastern Prairie
region, although it may be useful to keep an eye out for rust development,
especially for fields planted to susceptible varieties and winter wheat.
Kansas-Nebraska corridor – Given
limited leaf, stem, stripe and crown rust development in this corridor, generally
dry Prairie conditions, and early stages of Prairie crop development, as of May 31, 2023 the risk of stem, leaf,
stripe, and crown rust appearance from the Kansas-Nebraska corridor is limited
and scouting for these diseases in the Prairies is not urgent. From May 24-31, 2023 there were an increased
number of trajectories from the Kansas to Nebraska region to Manitoba and most
regions of Saskatchewan. Although rust
development has generally been limited in the Kansas to Nebraska region, recent
reports of stripe rust in Kansas commercial fields may be an emerging concern. In regions with 3-8 trajectories from the
Kansas to Nebraska corridor, farmers and consultants may consider keeping an
eye out for stripe rust development, especially in fields planted to
susceptible varieties and winter wheat.
