[Fhb-update_ma] FHB Update from PA, 05/31/17
FHB Updates - Mid Atlantic SWW Region
fhb-update_ma at scabusa.org
Wed May 31 12:32:14 EDT 2017
If you have wheat flowering now, or set to flower in the next week, consider
a spray for scab prevention. Throughout PA we have been experiencing
“Low” risk for the development of scab in wheat and barley…until now.
Much of the southern part of PA as well as central areas are going to be
increasing in risk level over the next several days. If you have wheat
beginning to flower in the next few weeks, keep watching the model: you will
probably want to spray.
If you choose to spray your wheat, you can do so from the beginning of
flowering up to about 5 days following the beginning of flowering. Remember,
sprays applied PRIOR to flowering will NOT provide significant suppression
of scab or toxin production. Caramba or Prosaro are effective on scab and
give control of most leaf diseases and glume blotch. They do not need to be
tank mixed with another product to control these diseases. If these products
are unavailable, Proline and Folicur (which together provide the same
chemicals as Prosaro) may be tank mixed at a rate of 3 + 3 fl oz/A. Spray
nozzles should be angled at 30° down from horizontal, toward the grain
heads, using forward- and backward mounted nozzles or nozzles with a two
directional spray, such as Twinjet nozzles. Do NOT use any
strobilurin-containing fungicides at heading or beyond.
Wheat in the southern parts of PA may now be showing symptoms if it was
infected at flowering. Look for portions of the head to be bleached white
instead of a healthy green. Having an idea of how much of your crop is
affected will be important as you make harvest decisions in the next several
weeks.
--Alyssa Collins, Extension Field Crops Pathologist, Penn State University
For more details, go to the FHB Risk assessment tool at
http://www.wheatscab.psu.edu
For the latest news and updates from the U.S. Wheat & Barley Scab
Initiative, go to https://www.scabusa.org
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