[Fhb-update_ma] FHB Update from PA, 05/16/16
FHB Updates - Mid Atlantic SWW Region
fhb-update_ma at scabusa.org
Mon May 16 08:56:06 EDT 2016
Wheat across the southern part of PA has begun to head out. In these areas,
we can expect the first flowering around mid-week. Due to the persistent
rains and humidity in this region, scab risk will continue to be high,
despite cooler temperatures. Rust diseases have not yet been observed in PA,
but powdery mildew and the leaf blotch diseases are present in many areas.
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 http://www.scabusa.org
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