[Fhb-update_ma] FHB Update from PA, 05/19/15

[FHB Updates - Mid Atlantic SWW Region]

Wheat is heading and beginning to flower across southern PA. Most counties
of PA are now at a “Low” risk for the development of scab in wheat and
barley that is currently flowering, for all but the most susceptible
varieties. Since our weather has been so variable, there are probably
localized areas that may have weather that is conducive to the production
and spread of spores (warm and wet). Use your judgement on this, as the
weather stations may not always be experiencing the same storm events as
your farm. Be prepared to spray a fungicide on fields that are at medium to
high risk at 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