All Wheat Alerts
Your search for Wheat Alerts yielded 3 results.
Swipe Left or Right to navigate Alerts
Stripe rust in Malheur County
Wheat Northern Idaho
Stripe Rust
Posted on: May 12, 2016 by Bill Buhrig
Stripe rust is being observed in wheat fields between Nyssa and Ontario. This falls in line with previous discoveries of stripe rust in neighbors areas including at the Parma R and E Center. As Juliet Marshall (U of I Aberdeen) suggests, weekly scouting is key and working with your crop consultant is important. Please see the link to the PNW Disease Handbook for more information.
» http://pnwhandbooks.org/plantdisease/wheat-triticum-aestivum-stripe-rust-yellow-rust
Stripe Rust in Parma Area
Wheat Treasure Valley
stripe rust
Posted on: May 11, 2016 by Jerry Neufeld
Dr. Oliver Neher (AMSCO Pathologist) and Dr. Olga Walsh (UI Parma Research and Extension Center) have found and confirmed stripe rust in the winter wheat nursery plots at the University of Idaho, Parma R&E Center.
Below is information Dr. Juliet Marshall (University of Idaho Cereals Extension Specialist) posted on this website regarding stripe rust a few days ago.
I highly recommend that anyone with a field of Brundage examine it closely for stripe rust, looking especially at lower leaves that could have been infected last fall. Snow cover protects wheat as well as the stripe rust from freezing temperatures. Fields that have been under snow will serve as good reservoirs for stripe rust to carry into our spring wheat.
All susceptible varieties should be scouted weekly from now on. Please report infected fields (the approximate location) and send pictures so I can keep alerts updated as the season progresses (jmarshall@uidaho.edu). This helps everyone!
Strobilurin fungicides are excellent preventative fungicides, as are triazoles. Triazoles (or triazole and strobilurin mixes) are more effective if there is a field with established infections. The attached table is (not a complete) list of fungicides put together by a group of pathologists belonging to the NCERA-184, with ratings for degree of control of several wheat diseases.
At this point:
1) Spray fungicides at herbicide timing on susceptible varieties of winter wheat.
2) Select resistant spring varieties, if possible.
3) Be prepared to spray susceptible winter and spring varieties as needed to protect from yield loss - this may be two or more applications of fungicides during the growing season.
4) Scout ALL varieties as there are sometimes changes in the fungal strains, and those varieties that are currently resistant may become susceptible if there are race changes in the fungi.
The use of resistant varieties is the most sustainable and economically viable method of stripe rust control. Breeders work hard to develop resistant varieties in order to help growers save input costs. It is not necessary to spray resistant varieties – in fact, not spraying resistant varieties will contribute to longer-term effectiveness of available fungicides.
» http://www.uidaho.edu/extension/cereals/scseidaho
» http://pnwpestalert.net/uploads/Stripe_Rust_Alert_4-5-16.pdf
» http://pnwpestalert.net/uploads/NCERA_184_Wheat_fungicide_table_2016_V1.pdf
Stripe Rust confirmed to have overwintered in susceptble winter wheat
Wheat All Locations
stripe rust of wheat
Posted on: April 5, 2016 by Juliet Marshall
I found stripe rust in two fields in south east Idaho on April 4, 2016. The first location was south of Aberdeen in a field of commercial wheat (Brundage).
The second location between American Falls and Pocatello was in a field of volunteer wheat (also Brundage) where stripe rust was found in November, 2015.
A report came in from CPS that a field of Brundage east of Wendell, ID, also has stripe rust (thank you Chris!!!)
From the symptoms, location on the lower leaves, and as one of the locations had confirmed stripe rust prior to the onset of winter, the existing stripe rust has overwintered from fall infections.
I highly recommend that anyone with a field of Brundage examine it closely for stripe rust, looking especially at lower leaves that could have been infected last fall. Snow cover protects wheat as well as the stripe rust from freezing temperatures. Fields that have been under snow will serve as good reservoirs for stripe rust to carry into our spring wheat.
All susceptible varieties should be scouted weekly from now on. Please report infected fields (the approximate location) and send pictures so I can keep alerts updated as the season progresses (jmarshall@uidaho.edu). This helps everyone!
Strobilurin fungicides are excellent preventative fungicides, as are triazoles. Triazoles (or triazole and strobilurin mixes) are more effective if there is a field with established infections. The attached table is (not a complete) list of fungicides put together by a group of pathologists belonging to the NCERA-184, with ratings for degree of control of several wheat diseases.
At this point:
1) Spray fungicides at herbicide timing on susceptible varieties of winter wheat.
2) Select resistant spring varieties, if possible.
3) Be prepared to spray susceptible winter and spring varieties as needed to protect from yield loss - this may be two or more applications of fungicides during the growing season.
4) Scout ALL varieties as there are sometimes changes in the fungal strains, and those varieties that are currently resistant may become susceptible if there are race changes in the fungi.
The use of resistant varieties is the most sustainable and economically viable method of stripe rust control. Breeders work hard to develop resistant varieties in order to help growers save input costs. It is not necessary to spray resistant varieties – in fact, not spraying resistant varieties will contribute to longer-term effectiveness of available fungicides.
The symptoms may not look like the typical long yellow-orange stripes that you see later in the season, but will look more like this:
(see attached picture)
