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Stripe rust off to an early start |
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April 18, 2017 |
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Yellow-orange urediniospores of stripe
rust on winter wheat leaves. Pustules
are typically long and narrow, which
differs from the scattered, individual
pustules of leaf rust and stem rust. |
Stripe rust is continuing to develop on winter
wheat across the region, due to weather
conditions that favor rust infection and spread.
In Whitman County, Washington, stripe rust is
about one month earlier than normal and similar
to the severe epidemic years of 2011 and 2016.
Growers should be scouting all winter wheat
fields and may want to use a fungicide with
their herbicide application if their wheat
variety is moderately susceptible or
susceptible, based on the rating in the Seed
Buyers Guide.
They should also treat their winter wheat if
stripe rust is found on 2-5% of the plants in a
field. Be sure to plant spring wheat that is
resistant to stripe rust as well.
You can find additional information on stripe
rust, including photos showing rust percentage,
under Foliar Fungal Diseases in the Disease
Resources section of the WSU Wheat and Small
Grains website,
http://smallgrains.wsu.edu/stripe-rust.
For questions or comments contact Tim Murray by
email,
tim.murray@wsu.edu, by phone (509) 335-7515,
or Twitter (@WSUWheatDoc). For additional
information contact Dr. Chen at
xianming@wsu.edu or (509) 335-8086; or Mike
Flowers at (541) 737-9940 or at
Mike.Flowers@oregonstate.edu. |
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