[Fhb-update_ma] FHB Update from PA, 05/05/17
FHB Updates - Mid Atlantic SWW Region
fhb-update_ma at scabusa.org
Fri May 5 16:02:35 EDT 2017
Over the next several days, our risk levels for FHB are dropping due to low
temperatures. Much of PA is experiencing rains that would prevent spraying
at this time anyway. Monitor closely as we go into next week to see if
increasing temperatures and possible scattered rains increase our risk.
Much of the barley in southern PA has headed and may be flowering or a bit
past flowering now, but if you get a window to spray, even if you feel like
you may be late, you can take it. The plants should be dry when you make
your application, but a shower soon after application probably won’t wash
much, if any, product off.
Wheat across the southern part of PA has begun to head out. In these areas,
we can expect the first flowering around the middle of next week. Be
prepared to spray a fungicide on fields that are at 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.
--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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